servers: usage statistics by command

.github/workflows/build.yml

@@ -320,14 +320,15 @@ jobs:
       - name: Clone project
         uses: actions/checkout@v3
 
-      - name: Set up uv
-        # uv takes Python from .python-version, the version of the Dockerfile's runtime stage.
-        uses: astral-sh/setup-uv@c18668ad3cf93ea998bef934396af7bb5c839dc7 # v10.2.0
+      - name: Set up Python
+        # Matches the runtime stage of scripts/resolver/service/Dockerfile.
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
 
-      - name: Lint
-        working-directory: scripts/resolver/service
-        run: uv run --frozen ruff check .
+      - name: Install resolver dependencies
+        # Must match scripts/resolver/service/pyproject.toml.
+        run: python -m pip install "eth-hash[pycryptodome]>=0.7"
 
       - name: Test
-        working-directory: scripts/resolver/service
-        run: uv run --frozen pytest -v
+        run: python -m unittest discover -s scripts/resolver/service -v

.gitignore

@@ -1,8 +1,4 @@
 *.lock
-# the resolver's Docker image and CI install exactly these
-!/scripts/resolver/service/uv.lock
-# local overrides of scripts/resolver/.env.example
-/scripts/resolver/.env
 *.db
 *.db.bak
 *.session.sql

cbits/sntrup761.c

@@ -719,32 +719,23 @@ Small_random (small * out, void *random_ctx, sntrup761_random_func * random)
 
 /* ----- Streamlined NTRU Prime Core */
 
-/* x^p-x-1 has a degree-19 factor mod 3, so a random g is not invertible in R3
-   with probability about 3^-19; KeyGen_attempts failures in a row mean a broken RNG */
-#define KeyGen_attempts 10
-
 /* h,(f,ginv) = KeyGen() */
-/* returns 0 if KeyGen succeeded; else -1 */
-static int
+static void
 KeyGen (Fq * h, small * f, small * ginv, void *random_ctx,
         sntrup761_random_func * random)
 {
   small g[p];
   Fq finv[p];
-  int i;
 
-  for (i = 0; i < KeyGen_attempts; ++i)
+  for (;;)
     {
       Small_random (g, random_ctx, random);
       if (R3_recip (ginv, g) == 0)
         break;
     }
-  if (i == KeyGen_attempts)
-    return -1;
   Short_random (f, random_ctx, random);
   Rq_recip3 (finv, f);          /* always works */
   Rq_mult_small (h, finv, g);
-  return 0;
 }
 
 /* c = Encrypt(r,h) */
@@ -893,21 +884,18 @@ typedef small Inputs[p];        /* passed by reference */
 #define PublicKeys_bytes Rq_bytes
 
 /* pk,sk = ZKeyGen() */
-/* returns 0 if KeyGen succeeded; else -1 */
-static int
+static void
 ZKeyGen (unsigned char *pk, unsigned char *sk, void *random_ctx,
          sntrup761_random_func * random)
 {
   Fq h[p];
   small f[p], v[p];
 
-  if (KeyGen (h, f, v, random_ctx, random) != 0)
-    return -1;
+  KeyGen (h, f, v, random_ctx, random);
   Rq_encode (pk, h);
   Small_encode (sk, f);
   sk += Small_bytes;
   Small_encode (sk, v);
-  return 0;
 }
 
 /* C = ZEncrypt(r,pk) */
@@ -972,21 +960,19 @@ HashSession (unsigned char *k, int b, const unsigned char *y,
 /* ----- Streamlined NTRU Prime */
 
 /* pk,sk = KEM_KeyGen() */
-int
+void
 sntrup761_keypair (unsigned char *pk, unsigned char *sk, void *random_ctx,
                    sntrup761_random_func * random)
 {
   int i;
 
-  if (ZKeyGen (pk, sk, random_ctx, random) != 0)
-    return -1;
+  ZKeyGen (pk, sk, random_ctx, random);
   sk += SecretKeys_bytes;
   for (i = 0; i < PublicKeys_bytes; ++i)
     *sk++ = pk[i];
   random (random_ctx, Inputs_bytes, sk);
   sk += Inputs_bytes;
   Hash_prefix (sk, 4, pk, PublicKeys_bytes);
-  return 0;
 }
 
 /* c,r_enc = Hide(r,pk,cache); cache is Hash4(pk) */

cbits/sntrup761.h

@@ -19,8 +19,7 @@
 
 typedef void sntrup761_random_func (void *ctx, size_t length, uint8_t *dst);
 
-/* returns 0 on success, -1 if the RNG never produced an invertible polynomial */
-int
+void
 sntrup761_keypair (uint8_t *pk, uint8_t *sk,
                    void *random_ctx, sntrup761_random_func *random);
 

contributing/CODE.md

@@ -7,7 +7,6 @@ This file provides guidance on coding style and approaches and on building the c
 When designing code and planning implementations:
 - Apply adversarial thinking, and consider what may happen if one of the communicating parties is malicious.
 - Formulate an explicit threat model for each change - who can do which undesirable things and under which circumstances.
-- Use the default cryptographic primitive for each purpose from the [primitive registry](../protocol/crypto-registry.md); any exception requires review, and the registry must be updated with every new primitive use or domain-separation string.
 
 ## Code Quality Standards
 

plans/2026-09-26-client-address-stats.md

@@ -0,0 +1,309 @@
+# Implementation plan: client address statistics
+
+Scope:
+
+- SMP server
+- XFTP server
+- NTF server
+
+## Rules
+
+- Counters per address are kept in memory only.
+- Counters are neither saved nor restored.
+- Prometheus receives aggregates across addresses only.
+- Addresses are not logged.
+- Addresses are shown only by a control port command.
+
+## Address key
+
+```
+data AddrKey
+  = AKIPv4 Word32
+  | AKIPv6 Word64
+```
+
+Key of a socket address:
+
+- IPv4 address: `AKIPv4`.
+- IPv6 address in `::ffff:0:0/96`: `AKIPv4` of its last 32 bits.
+- Other IPv6 address: `AKIPv6` of its first 64 bits.
+- Other address types: not counted.
+
+Text of a key:
+
+- `AKIPv4`: `a.b.c.d`.
+- `AKIPv6`: `xxxx:xxxx:xxxx:xxxx::/64`.
+
+## Counters
+
+Each server has a fixed set of counters:
+
+```
+class (Ord c, Enum c, Bounded c) => AddrCounter c where
+  counterName :: c -> Text
+  counterBounds :: c -> [Int]
+  connectionsCounter :: c
+```
+
+`counterName` is the Prometheus label value and the control port argument.
+
+Counters of every server:
+
+- `connections`: connections passed to the protocol handler, after TLS setup.
+- One counter per command tag, named by the tag: an attempt is counted, failed ones included.
+- `errors`: parse failures and authorization failures.
+
+Command tag types:
+
+- SMP: `CommandTag` in `Simplex.Messaging.Protocol`.
+- XFTP: `FileCommandTag` in `Simplex.FileTransfer.Protocol`.
+- NTF: `NtfCommandTag` in `Simplex.Messaging.Notifications.Protocol`.
+
+A function from a command to its counter is added for each server.
+
+SMP proxy counters, by result of `PRXY`:
+
+- `PRXY_own`: own server.
+- `PRXY_connected`: other server with an existing connection.
+- `PRXY_new`: other server with a new connection.
+- `PRXY_onion`: server with onion hosts only.
+- `PRXY_failed`: error.
+
+SMP proxy counters, by result of `PFWD`:
+
+- `PFWD_own`: own server.
+- `PFWD_other`: other server.
+- `PFWD_onion`: server with onion hosts only.
+- `PFWD_failed`: error other than a protocol error, or no session.
+
+Class precedence: `failed`, then `own`, then `onion`.
+
+XFTP counters:
+
+- `upload_kb`: kilobytes of chunks stored by successful `FPUT`.
+- `download_kb`: kilobytes of chunks sent for `FGET`.
+- `recipients`: recipient keys added by successful `FNEW` and `FADD`.
+
+## Periods
+
+- A period is a fixed interval of `period` seconds. The first period starts at server start.
+- Counts of the current period are accumulated as events occur.
+- Counts of the previous period are the counts of the last closed period.
+- Histograms use the counts of closed periods.
+- The control port command shows the previous and the current counts, sorted by their sum.
+
+## Module `Simplex.Messaging.Server.AddressStats`
+
+```
+data AddrStats c = AddrStats
+  { connectionsCount :: TVar Int,
+    current :: Map c (IORef Int),
+    previous :: Map c (IORef Int)
+  }
+
+type AddrStatsMap c = TMap AddrKey (AddrStats c)
+
+data AddrHistogram = AddrHistogram
+  { bucketCounts :: [Int],
+    countSum :: Int,
+    addressCount :: Int,
+    periodMax :: Int
+  }
+
+newtype AddressStatsConfig = AddressStatsConfig
+  { period :: Int64
+  }
+```
+
+- `current` and `previous` contain one cell per counter, created when the address is inserted.
+- `bucketCounts` are cumulative counts per bound, from server start.
+
+Bounds:
+
+- `countBounds`: 1 to 9, then R10 values times powers of 10, rounded half up to integers, up to 1,000,000: 60 bounds.
+- `kilobyteBounds`: the same, up to 100,000,000: 80 bounds.
+- R10 values: 1, 1.25, 1.6, 2, 2.5, 3.15, 4, 5, 6.3, 8.
+
+Functions:
+
+- `addrKey :: SockAddr -> Maybe AddrKey`
+- `addrKeyText :: AddrKey -> Text`
+- `counterByName :: AddrCounter c => Text -> Maybe c`
+- `withAddrStats :: AddrCounter c => Maybe (AddrStatsMap c) -> Socket -> (Maybe (AddrStats c) -> IO a) -> IO a`:
+  1. The peer address is read with `getPeerName`. On an exception, the connection is not counted.
+  2. In one transaction, the entry is looked up or inserted, and `connectionsCount` is incremented.
+  3. `connectionsCounter` is incremented.
+  4. The action is run. `connectionsCount` is decremented in `finally`.
+- `incAddrCounter :: AddrCounter c => AddrStats c -> c -> IO ()`
+- `addAddrCounter :: AddrCounter c => AddrStats c -> c -> Int -> IO ()`
+- `rolloverAddrStats :: AddrCounter c => AddrStatsMap c -> IORef (Map c AddrHistogram) -> IO ()`, in one pass over the entries, per counter:
+  1. The `current` cell is set to 0. Its value is the closing count.
+  2. A non-zero closing count is added to the histogram: to each bucket with a bound at or above it, to `countSum`, and to `addressCount`.
+  3. `periodMax` is the largest closing count.
+  4. The `previous` cell is set to the closing count.
+  
+  After the pass, an entry is deleted when `connectionsCount` is 0 and every closing count is 0. `connectionsCount` is read in the deleting transaction.
+- `addressStatsThread :: AddrCounter c => AddressStatsConfig -> AddrStatsMap c -> IORef (Map c AddrHistogram) -> IO ()`: `rolloverAddrStats` every `period` seconds.
+- `topAddresses :: AddrCounter c => AddrStatsMap c -> c -> Int -> IO [(AddrKey, Int, Int)]`: the key, previous count and current count of the counter, for up to the given number of entries, sorted by the sum of both counts, largest first. Entries with both counts 0 are excluded.
+- `addrHistogramMetrics :: AddrCounter c => Text -> Map c AddrHistogram -> Text`: Prometheus text for a metric name prefix.
+
+## Prometheus
+
+Written with the other metrics of each server, when both `addressStats` and `prometheus_interval` are set:
+
+```
+# TYPE <prefix>_client_address_period_count histogram
+<prefix>_client_address_period_count_bucket{counter="<name>",le="<bound>"} <addresses>
+<prefix>_client_address_period_count_bucket{counter="<name>",le="+Inf"} <addresses>
+<prefix>_client_address_period_count_sum{counter="<name>"} <sum>
+<prefix>_client_address_period_count_count{counter="<name>"} <addresses>
+# TYPE <prefix>_client_address_period_max gauge
+<prefix>_client_address_period_max{counter="<name>"} <max>
+```
+
+Prefixes:
+
+- `simplex_smp`
+- `simplex_xftp`
+- `simplex_ntf`
+
+In scrape jobs, `convert_classic_histograms_to_nhcb: true` is set.
+
+## Configuration
+
+The same INI section in `smp-server.ini`, `file-server.ini` and `ntf-server.ini`:
+
+```
+[ADDRESS_STATS]
+enable = off
+period = 300
+```
+
+- `enable = off` or an absent section: statistics are off.
+- `period`: seconds.
+
+`iniAddressStats :: Ini -> Maybe AddressStatsConfig` is added to `Simplex.Messaging.Server.CLI`.
+
+Added to `ServerConfig`, `XFTPServerConfig` and `NtfServerConfig`:
+
+```
+addressStats :: Maybe AddressStatsConfig
+```
+
+The section is written by the `init` command of each server with `enable = off`.
+
+With `addressStats` set:
+
+- an `AddrStatsMap` and a histogram reference are added to the server env
+- `addressStatsThread` is added to the server threads
+
+## Control port
+
+Command of the SMP, XFTP and NTF control ports:
+
+```
+addresses <counter> [<n>]
+```
+
+- User role.
+- `<counter>`: a counter name.
+- `<n>`: number of addresses, 10 when absent.
+
+Output of `topAddresses`:
+
+```
+address,previous,current
+<key>,<count>,<count>
+```
+
+Errors:
+
+- Unknown counter name: `error: unknown counter`.
+- Statistics off: `error: address statistics are off`.
+
+Changes:
+
+- `CPAddresses Text (Maybe Int)` is added to `ControlProtocol` in `Simplex.Messaging.Server.Control`, `Simplex.FileTransfer.Server.Control` and `Simplex.Messaging.Notifications.Server.Control`.
+- `addresses` is added to the `help` output of each control port.
+
+## SMP server
+
+In `Simplex.Messaging.Server`:
+
+- `runServer`: in the branch without HTTP, `runTransportServerState_` is called with `TLSServerCredential {credential = smpCreds, sniCredential = Nothing}`. In both branches, the socket is passed to `runClient`.
+- `runClient` is run in `withAddrStats`. The `AddrStats` is passed to `runClientTransport`.
+- `clientAddrStats :: Maybe (AddrStats SMPAddrCounter)` is added to `Client`, as a parameter of `newClient`.
+- `receive`:
+  - The counter of each parsed transmission is incremented.
+  - `errors` is incremented for each parse error and each failed verification.
+- `processProxiedCmd`: the proxy counter is incremented when the result of `PRXY` or `PFWD` is known.
+
+## NTF server
+
+In `Simplex.Messaging.Notifications.Server`:
+
+- `runServer`: `runTransportServerState_` is called with a new `SocketState` and `TLSServerCredential {credential = srvCreds, sniCredential = Nothing}`. The socket is passed to `runClient`.
+- `runClient` is run in `withAddrStats`. The `AddrStats` is passed to `runNtfClientTransport`.
+- `ntfClientAddrStats :: Maybe (AddrStats NtfAddrCounter)` is added to `NtfServerClient`, as a parameter of `newNtfServerClient`.
+- `receive`: counting as in the SMP server.
+
+## XFTP server
+
+In `Simplex.Messaging.Transport.HTTP2.Server`:
+
+- A parameter `Socket -> SessionId -> IO () -> IO ()` is added to `runHTTP2Server`. The handler of each connection is run inside it, after TLS setup.
+- In `getHTTP2Server`, the wrapper only runs the handler.
+
+In `Simplex.FileTransfer.Server`:
+
+- `TMap SessionId (AddrStats XFTPAddrCounter)` is created in `runServer`.
+- In the connection wrapper, the handler is run in `withAddrStats`. The `AddrStats` is inserted in the map before the handler, and deleted in `finally`.
+- `addrStats :: Maybe (AddrStats XFTPAddrCounter)` is added to `XFTPTransportRequest`. It is looked up by session ID for each request.
+- `processRequest`:
+  - The counter of each decoded command is incremented.
+  - `errors` is incremented for each decoding error and each failed verification.
+- `upload_kb` is increased by the chunk size, rounded up to kilobytes, after a successful `FPUT`.
+- `download_kb` is increased by the chunk size, rounded up to kilobytes, when an `FGET` response with the file is sent.
+- `recipients` is increased by the number of recipient keys after a successful `FNEW` or `FADD`.
+
+## Tests
+
+`CoreTests.AddressStatsTests`:
+
+- `addrKey`:
+  - IPv4 address
+  - IPv4-mapped IPv6 address
+  - two IPv6 addresses in one /64: one key
+  - two IPv6 addresses in different /64: two keys
+- bounds:
+  - `countBounds` values
+  - `kilobyteBounds` values
+- `counterByName` of each counter name
+- `rolloverAddrStats`:
+  - histogram buckets, sum, address count, and max
+  - zero counts not added to histograms
+  - previous counts set to closing counts
+  - entry with an open connection kept
+  - entry with closing counts kept
+  - entry without connections and closing counts deleted
+- `topAddresses`:
+  - order by the sum of previous and current counts
+  - number of entries limited
+  - entries with both counts 0 excluded
+- `addrHistogramMetrics` output
+- command to counter function of each server
+
+Server tests, with `addressStats` set and `period` 1:
+
+- SMP basic queue tests
+- SMP proxy tests
+- XFTP basic file tests
+- NTF basic token tests
+
+Control port test, SMP server with `addressStats` and a control port set:
+
+- after messages are sent, `addresses SEND` lists the test client address
+- `addresses` without authentication returns `AUTH`
+- `addresses` with an unknown counter returns `error: unknown counter`
+
+`CLITests`: `enable = off` is checked in `[ADDRESS_STATS]` of each generated INI.

protocol/agent-protocol.md

@@ -85,7 +85,7 @@ SMP agent protocol has 2 main parts:
 
 ![Duplex connection procedure](./diagrams/duplex-messaging/duplex-creating.svg)
 
-The procedure of establishing a duplex connection is explained on the example of Alice (the initiating party) and Bob (the joining party) creating a bi-directional connection consisting of two unidirectional (simplex) queues, using SMP agents (A and B) to facilitate it, and two different SMP routers (which could be the same router). It is shown on the diagram above and has these steps:
+The procedure of establishing a duplex connection is explained on the example of Alice and Bob creating a bi-directional connection consisting of two unidirectional (simplex) queues, using SMP agents (A and B) to facilitate it, and two different SMP routers (which could be the same router). It is shown on the diagram above and has these steps:
 
 1. Alice requests the new connection from the SMP agent A using agent `createConnection` api function.
 2. Agent A creates an SMP queue on the router (using [SMP protocol](./simplex-messaging.md) `NEW` command) and responds to Alice with the invitation that contains queue information and the encryption keys Bob's agent B should use. The invitation format is described in [Connection link](connection-link-1-time-invitation-and-contact-address).
@@ -208,7 +208,7 @@ This syntax of decrypted SMP client message body is defined by `decryptedAgentMe
 Decrypted SMP message client body can be one of 4 types:
 - `agentConnInfo` - used by the initiating party when confirming reply queue - sent in `agentConfirmation` envelope.
 - `agentConnInfoReply` - used by accepting party, includes reply queue(s) in the initial confirmation - sent in `agentConfirmation` envelope.
-- `agentRatchetInfo` - used to pass additional information when renegotiating double ratchet encryption - sent in `agentRatchetKey` envelope. A key sent in reply to another key includes the hash of that key; agents do not reply to such keys.
+- `agentRatchetInfo` - used to pass additional information when renegotiating double ratchet encryption - sent in `agentRatchetKey` envelope.
 - `agentMessage` - all other agent messages.
 
 `agentMessage` contains these parts:
@@ -233,8 +233,7 @@ connInfo = *OCTET
 agentConnInfoReply = %s"D" smpQueues connInfo
 smpQueues = length 1*newQueueInfo ; NonEmpty list of reply queues
 agentRatchetInfo = %s"R" ratchetInfo
-ratchetInfo = [answeredKeyHash *OCTET] ; bytes after answeredKeyHash are ignored
-answeredKeyHash = %s"0" / (%s"1" shortString) ; "0" in a key that starts renegotiation, otherwise SHA-256 of the two raw public keys of the answered key
+ratchetInfo = *OCTET
 
 agentMessage = %s"M" agentMsgHeader aMessage
 agentMsgHeader = agentMsgId prevMsgHash

protocol/crypto-registry.md

@@ -1,189 +0,0 @@
-Revision 1, 2026-10-01
-
-# SimpleX Network: cryptographic primitive registry
-
-The cryptographic primitives, constructions and domain-separation strings used by this repository, and which of them new code may use. For the threat model see [Security](./security.md).
-
-Module aliases follow the codebase: `C` = [Simplex.Messaging.Crypto](../src/Simplex/Messaging/Crypto.hs), `LC` = [Crypto.Lazy](../src/Simplex/Messaging/Crypto/Lazy.hs), `CR` = [Crypto.Ratchet](../src/Simplex/Messaging/Crypto/Ratchet.hs), `SL` = [Crypto.ShortLink](../src/Simplex/Messaging/Crypto/ShortLink.hs), `KEM` = [Crypto.SNTRUP761](../src/Simplex/Messaging/Crypto/SNTRUP761.hs) and [its bindings](../src/Simplex/Messaging/Crypto/SNTRUP761/Bindings.hs), `BBS` = [Crypto.BBS](../src/Simplex/Messaging/Crypto/BBS.hs). Lengths are in bytes.
-
-## Table of contents
-
-- [Policy](#policy)
-- [Defaults for new code](#defaults-for-new-code)
-- [Primitives](#primitives)
-- [SimpleX box constructions](#simplex-box-constructions)
-- [Domain separation and KDF inputs](#domain-separation-and-kdf-inputs)
-- [Nonces and IVs](#nonces-and-ivs)
-- [Implementation sources](#implementation-sources)
-- [xftp-web (TypeScript)](#xftp-web-typescript)
-- [Tests](#tests)
-
-## Policy
-
-- New code uses the default primitive for its purpose from [Defaults for new code](#defaults-for-new-code).
-- Using any other primitive, or a primitive marked *restricted* outside its listed purpose, requires a written justification in the pull request and review by a maintainer responsible for cryptography.
-- *Legacy-only* primitives stay only for the existing wire formats and stored data listed below. Do not add call sites.
-- Every new HKDF info string or hash prefix must be unique, start with `SimpleX`, and be added to [Domain separation and KDF inputs](#domain-separation-and-kdf-inputs).
-- Changing a primitive, key length, KDF input, info string or nonce construction changes the wire format. It requires a protocol version and an update of this registry and of the affected `protocol/` specification.
-
-Status values used below:
-
-| Status | Meaning |
-|---|---|
-| Default | Approved and preferred for new code for this purpose |
-| Approved | Approved for new code for this purpose when the default does not fit |
-| Restricted | Approved only for the listed purpose (external interoperability or a single protocol) |
-| Legacy-only | Kept for existing wire formats or stored data; no new call sites |
-
-## Defaults for new code
-
-| Purpose | Default | Functions |
-|---|---|---|
-| Signature | Ed25519 | `C.sign'`, `C.verify'` with `C.SEd25519` |
-| Key agreement | X25519 | `C.generateKeyPair`, `C.dh'` |
-| Post-quantum KEM | sntrup761 | `KEM.sntrup761Keypair`, `sntrup761Enc`, `sntrup761Dec` |
-| Hybrid DH + KEM secret | HKDF-SHA512 over `dh \|\| kemSecret` with a new info string, as in `CR.rootKdf` | `C.hkdf` |
-| Authenticated encryption | XSalsa20-Poly1305 [SimpleX secretbox](#simplex-box-constructions) | `C.sbEncrypt`/`C.sbDecrypt`, `LC.sbEncryptTailTag` for streams |
-| Authenticated encryption with a DH secret | XSalsa20-Poly1305 [SimpleX crypto_box](#simplex-box-constructions) | `C.cbEncrypt`/`C.cbDecrypt` |
-| Forward-secret symmetric session | HKDF-SHA512 key chain | `C.sbcInit`, `C.sbcHkdf` |
-| KDF | HKDF-SHA512 | `C.hkdf` |
-| Hash commitment, derived identifier | SHA3-256 | `C.sha3_256` |
-| Certificate fingerprint | SHA-256 X.509 fingerprint | `C.signedFingerprint`, `C.certificateFingerprint` |
-| Randomness | ChaChaDRG seeded from system entropy | `C.newRandom`, `C.randomBytes` and the `random*` helpers |
-
-## Primitives
-
-| Primitive | Status | Purpose and protocol | Implementation | Lengths |
-|---|---|---|---|---|
-| Ed25519 | Default | SMP/NTF/XFTP queue and file keys (agent default `rcvAuthAlg`, `sndAuthAlg` in [Agent/Env/SQLite.hs](../src/Simplex/Messaging/Agent/Env/SQLite.hs)), short-link signatures and owner auth (`SL.encodeSign`, `SL.newOwnerAuth`), XRCP identity and session keys ([RemoteControl/Invitation.hs](../src/Simplex/RemoteControl/Invitation.hs)), agent service request signatures, client/service TLS certificates ([Transport/Credentials.hs](../src/Simplex/Messaging/Transport/Credentials.hs)) | crypton `Crypto.PubKey.Ed25519` via `C.sign'`/`C.verify'` | pub 32, priv 32, sig 64; X.509 SPKI 44 |
-| Ed448 | Approved | Server CA and online certificates (default `signAlgorithm = ED448` in [Server/CLI.hs](../src/Simplex/Messaging/Server/CLI.hs)); accepted for SMP command signatures and TLS | crypton `Crypto.PubKey.Ed448`; server key generation by the `openssl genpkey` CLI | pub 57, priv 57, sig 114; SPKI 69 |
-| X25519 | Default | Per-queue e2e and server-to-recipient `crypto_box` keys, SMP session DH, command authenticator (SMP v7+), proxy (PRXY/PFWD), notification tokens, XFTP chunk transport, XRCP hello and announcements | crypton `Crypto.PubKey.Curve25519` via `C.dh'` | pub 32, priv 32, secret 32; SPKI 44 |
-| X448 | Restricted | E2E double ratchet only: X3DH and DH ratchet (`CR.RatchetX448`, E2E v3) | crypton `Crypto.PubKey.Curve448` | pub 56, priv 56, secret 56 |
-| sntrup761 | Default | PQ KEM in double ratchet (E2E v3, agent v5+) and XRCP v1 hello | Vendored C [cbits/sntrup761.c](../cbits/sntrup761.c) via FFI; randomness from ChaChaDRG through `haskell_rng_func` ([Bindings/RNG.hs](../src/Simplex/Messaging/Crypto/SNTRUP761/Bindings/RNG.hs)) | pk 1158, sk 1763, ct 1039, shared 32 |
-| XSalsa20-Poly1305, SimpleX crypto_box | Default | SMP message bodies (server to recipient), per-queue e2e envelope, confirmations, proxy forwarding, notifications, XRCP hello, XFTP chunk transport | crypton `Crypto.Cipher.XSalsa`, `Crypto.MAC.Poly1305`; `C.cryptoBox`, `LC.cbInit` | key 32 (DH secret), nonce 24, tag 16 |
-| XSalsa20-Poly1305, SimpleX secretbox | Default | SMP transport block encryption (SMP v11+), short-link data (SMP v15+), XFTP file encryption, local file encryption ([Crypto/File.hs](../src/Simplex/Messaging/Crypto/File.hs)), XRCP session | same; `C.sbEncrypt`, `LC.sbEncryptTailTag`, `LC.sbInit` | key 32, nonce 24, tag 16 |
-| crypto_box authenticator | Approved | Deniable sender command authorization with X25519 queue keys (SMP v7+); agent currently creates Ed25519 keys | `C.cbAuthenticate`, `C.cbVerify`: `crypto_box(sha512(msg))` | 80 = 64 + 16 |
-| AES-256-GCM, 16-byte IV | Legacy-only | Double ratchet header and body (E2E v3, [pqdr.md](./pqdr.md)) | crypton `Crypto.Cipher.AES`, `Crypto.Cipher.Types`; `C.encryptAEAD`, `C.decryptAEAD`, `C.initAEAD`; J0 = GHASH(IV) as NIST SP 800-38D defines for non-96-bit IVs | key 32, IV 16, tag 16; padded header 88 (PQ off) or 2310 (PQ on), `CR.paddedHeaderLen` |
-| AES-256-GCM, 12-byte IV | Restricted | WebRTC frame encryption in simplex-chat (`Simplex.Chat.Mobile.WebRTC`), for WebCrypto interoperability | `C.encryptAESNoPad`, `C.decryptAESNoPad`, `C.initAEADGCM`, `C.GCMIV` | key 32, IV 12, tag 16 |
-| HKDF-SHA512 | Default | All KDFs listed in [Domain separation](#domain-separation-and-kdf-inputs) | crypton `Crypto.KDF.HKDF` with `SHA512`; `C.hkdf` (extract + expand) | output per use, at most 255 * 64 |
-| SHA-256 | Default for X.509 fingerprints, otherwise Restricted | X.509 fingerprints (`C.KeyHash`, server identity, XRCP CA, service certificate hash, SMP v16+), XFTP chunk digests, agent message hashes, `requestCode`, ratchet key dedup hash, security code `codeAD = sha256(rcAD)` | crypton; `C.sha256Hash`, `LC.sha256Hash`, `getFingerprint ... HashSHA256` | 32 |
-| SHA-512 | Restricted | XFTP file digests and file description hash, input of the crypto_box authenticator | crypton; `C.sha512Hash`, `LC.sha512Hash` | 64 |
-| SHA-512 (inside sntrup761) | Restricted | sntrup761 internal hash | [cbits/sha512.c](../cbits/sha512.c) calls OpenSSL `SHA512()` from the system `libcrypto` (`extra-libraries: crypto`) | 64 |
-| SHA3-256 | Default | Short-link key `sha3_256(fixedData)` (SMP v15+), XRCP hybrid secret, service request binding (agent v8) | crypton; `C.sha3_256`, `KEM.kemHybridSecret` | 32 |
-| SHA3-384 | Restricted | Client-supplied sender ID: first 24 bytes of `sha3_384(corrId)`, computed by the agent (`prepareConnectionLink'`, `newRcvConnSrv`) and the server (`createQueue`) | crypton; `C.sha3_384` | 48, truncated to 24 |
-| Keccak-256 | Restricted | Label hash for SMP name queries (`NameQuery NQHash`), must match the on-chain registry | crypton `Keccak_256`; `labelHash` in [SimplexName.hs](../src/Simplex/Messaging/SimplexName.hs) | 32 |
-| MD5 | Legacy-only, non-security | XOR-aggregated queue ID hash `IdsHash` for service subscription reconciliation (SUBS, NSUBS, SOKS, ENDS) | crypton (`C.md5Hash`, `Protocol.queueIdHash`); SQLite UDF `simplex_xor_md5_combine` ([Agent/Store/SQLite.hs](../src/Simplex/Messaging/Agent/Store/SQLite.hs)); PostgreSQL pgcrypto `digest(..., 'md5')` in server and NTF schemas | 16 |
-| ChaChaDRG | Default | Keys, nonces, correlation IDs, random IDs, sntrup761 randomness | crypton `Crypto.Random`; `C.newRandom` seeds with `drgNew` from system entropy | n/a |
-| BBS+ over BLS12-381, SHA-256 suite | Restricted | Badge entitlement credentials and proofs ([Crypto/Entitlement.hs](../src/Simplex/Messaging/Crypto/Entitlement.hs)), XFTP storage-time extension | Vendored submodules libbbs and blst (C and assembly) via FFI; randomness from libbbs `getentropy`, `SecRandomCopyBytes` with the `commoncrypto` flag, `BCryptGenRandom` on Windows ([cbits/getentropy_win.c](../cbits/getentropy_win.c)) | sk 32, pk 96, sig 80, proof 272 + 32 per undisclosed message |
-| ECDSA with SHA-256 (ES256) | Restricted | APNS provider JWT ([Push/APNS.hs](../src/Simplex/Messaging/Notifications/Server/Push/APNS.hs)) | crypton `Crypto.PubKey.ECC.ECDSA.sign`; key read by cryptostore `Crypto.Store.PKCS8`; curve taken from the key file | signature DER `SEQUENCE {r, s}`, base64url |
-| TLS 1.3 / 1.2 | Restricted | SMP, XFTP, NTF, XRCP transport: `TLS_CHACHA20_POLY1305_SHA256` (1.3), `ECDHE_ECDSA_CHACHA20POLY1305_SHA256` (1.2), groups X448 and X25519, Ed448 and Ed25519 signatures (`defaultSupportedParams`) | `tls` 1.9 | n/a |
-| TLS for browsers | Restricted | XFTP server with HTTPS credentials (`defaultSupportedParamsHTTPS`: `ciphersuite_strong`, FFDHE, P-521, ECDSA and RSA signatures); SMP server HTTPS requires RSA-4096 (`checkHTTPSCredentials`) | `tls`, `warp-tls` | n/a |
-| X.509 | Restricted | Certificate chains, fingerprints, signed session keys (`C.signX509`, `C.verifyX509`) | `crypton-x509`, `crypton-x509-validation`, `cryptostore` | n/a |
-| SQLCipher | Restricted | Agent SQLite database at rest (`PRAGMA key`); cipher parameters are SQLCipher defaults, not set in this repository | `direct-sqlcipher` (git dependency, [cabal.project](../cabal.project)) | n/a |
-
-## SimpleX box constructions
-
-`C.cryptoBox` and `LC.sbInit_` compute, for a 32-byte key `k` and 24-byte nonce `n`:
-
-```
-k1 = HSalsa20(k, 0^16)
-subkey = HSalsa20(k1, n[0..16])
-stream = Salsa20(subkey, n[16..24])
-polyKey = stream[0..32]
-ct = msg XOR stream[32..]
-tag = Poly1305(polyKey, ct)
-```
-
-| Construction | Key `k` | Equivalent libsodium call | Layout |
-|---|---|---|---|
-| SimpleX crypto_box (`C.cbEncrypt`, `LC.cbInit`) | X25519 shared secret | `crypto_box_easy` (`crypto_box_beforenm` is `HSalsa20(dh, 0^16)`) | strict: `tag \|\| ct`; lazy tail-tag: `ct \|\| tag` |
-| SimpleX secretbox (`C.sbEncrypt`, `LC.sbInit`, `KEM.kcb*`) | 32-byte symmetric key | `crypto_secretbox_easy` with key `crypto_core_hsalsa20(0^16, k)`, not with `k` | same |
-
-Padding before encryption: `C.pad` prefixes a 2-byte big-endian length and fills with `#` (message at most 65533 bytes); `LC.pad` prefixes an 8-byte length. `*NoPad` variants skip padding.
-
-## Domain separation and KDF inputs
-
-HKDF is `C.hkdf salt ikm info len` (HKDF-SHA512).
-
-| Info string | Salt | IKM | Output (split) | Function | Use |
-|---|---|---|---|---|---|
-| `"SimpleXX3DH"` | 64 zero bytes | `dh1 \|\| dh2 \|\| dh3 [\|\| kemShared]` | 96: `hk`, `nhk`, root key (32 each) | `CR.pqX3dh` | Ratchet initialization, added in E2E v2; KEM secret from E2E v3 (current minimum) |
-| `"SimpleXVerifyCode"` | 64 zero bytes | same as `SimpleXX3DH` | 32: `rcVCPQ` | `CR.pqX3dh` | Verification code covering all handshake keys, new ratchets |
-| `"SimpleXRootRatchet"` | root key | `dh [\|\| kemShared]` | 96: root key, chain key, next header key | `CR.rootKdf` | DH/PQ ratchet step |
-| `"SimpleXChainRatchet"` | empty | chain key | 96: chain key, message key (32 each), message IV (16), header IV (16) | `CR.chainKdf` | Per-message keys |
-| `"SimpleXSbChainInit"` | SMP session ID | X25519 session secret | 64: two 32-byte chain keys | `C.sbcInit` from `Transport.blockEncryption` | SMP transport block encryption, SMP v11+ |
-| `"SimpleXSbChainInit"` | empty | XRCP hybrid secret (below) | 64: two 32-byte chain keys | `C.sbcInit` in [RemoteControl/Client.hs](../src/Simplex/RemoteControl/Client.hs) | XRCP v1 session |
-| `"SimpleXSbChain"` | empty | chain key | 88: chain key (32), secretbox key (32), nonce (24) | `C.sbcHkdf` | Each SMP block and XRCP message |
-| `"SimpleXContactLink"` | empty | link key (32) | 56: link ID (24), secretbox key (32) | `SL.contactShortLinkKdf` | Contact short links, SMP v15+ |
-| `"SimpleXInvLink"` | empty | link key (32) | 32: secretbox key | `SL.invShortLinkKdf` | Invitation short links, SMP v15+ |
-
-Other derivations:
-
-| Value | Construction | Function | Use |
-|---|---|---|---|
-| Service request binding | `sha3_256("SimpleXService" \|\| rcAD)` | `serviceReqBinding` in [Agent.hs](../src/Simplex/Messaging/Agent.hs) | Agent RPC, agent v8 |
-| BBS header | `"SimpleX badges v1"` | `entitlementBBSHeader` | Badge credentials |
-| XRCP hybrid secret | `sha3_256(x25519Dh \|\| kemShared)` | `KEM.kemHybridSecret` | XRCP v1 |
-| Short-link key | `sha3_256(smpEncode FixedLinkData)` | `SL.encodeSignFixedData`, checked in `SL.decryptLinkData` | SMP v15+ |
-| Sender ID | `take 24 (sha3_384 corrId)` | `prepareConnectionLink'`, `newRcvConnSrv` in Agent.hs; `createQueue` in [Server.hs](../src/Simplex/Messaging/Server.hs) | Client-supplied sender ID with link data, SMP v15+; the server rejects a mismatch to prevent an ID oracle |
-| Ratchet associated data | `pubKeyBytes sk1 \|\| pubKeyBytes rk1` (raw X448, 112) | `CR.pqX3dh` | AD of every ratchet AEAD |
-| Security code | `sha256(rcAD)` | `ratchetVerifyCodes` in [AgentStore.hs](../src/Simplex/Messaging/Agent/Store/AgentStore.hs) | Connection verification |
-| Contact request code | `sha256(smpEncode (k1, k2, kem, sndId))` | `requestCode` in Agent.hs | Contact request binding |
-| Command authenticator | `crypto_box(sha512(authorized))` | `C.cbAuthenticate` | SMP v7+ |
-| Queue IDs hash | `xor` of `md5(queueId)` | `Protocol.queueIdsHash` | Service subscriptions |
-
-`"SimpleXSbChainInit"` and `"SimpleXSbChain"` are shared by SMP block encryption and XRCP. Their outputs are separated only by the IKM (and the salt for `sbcInit`).
-
-## Nonces and IVs
-
-| Use | Construction |
-|---|---|
-| SMP command authenticator, proxied command | `C.cbNonce corrId`, where `corrId` is a random 24-byte nonce (`C.randomCbNonce`) |
-| SMP proxied responses | `C.reverseNonce` of the request nonce |
-| Server-to-recipient message body | `C.cbNonce msgId`; `msgIdBytes = 24` in [Server/Main.hs](../src/Simplex/Messaging/Server/Main.hs) |
-| Per-queue e2e envelope, short-link data, notifications, XRCP hello, XFTP chunk download | Random 24-byte nonce, sent with the ciphertext |
-| XFTP file, local encrypted file | Random key and nonce per file (`C.randomSbKey`, `C.randomCbNonce`) |
-| SMP block, XRCP session messages | Key and nonce from `C.sbcHkdf`, one per block |
-| Ratchet header, body | 16-byte IVs from `CR.chainKdf`; header IV is sent, body IV is not |
-| WebRTC frames | 12-byte `C.GCMIV` supplied by the caller in simplex-chat |
-
-## Implementation sources
-
-| Source | Version or pin | Provides |
-|---|---|---|
-| crypton | 0.34 | Ed25519, Ed448, X25519, X448, XSalsa20, Poly1305, AES-GCM, HKDF, SHA-2, SHA-3, Keccak, MD5, ChaChaDRG, ECDSA |
-| tls, crypton-x509, crypton-x509-validation, cryptostore | 1.9.0, 1.7.6, 1.6.12, 0.3.0.1 | TLS, X.509, PKCS#8 |
-| [cbits/sntrup761.c](../cbits/sntrup761.c) | Copy of draft-josefsson-ntruprime-streamlined-00 ([cbits/README.md](../cbits/README.md)) | sntrup761 |
-| [cbits/sha512.c](../cbits/sha512.c) and system OpenSSL `libcrypto` | system | SHA-512 for sntrup761 |
-| `cbits/libbbs` submodule ([simplex-chat/libbbs](https://github.com/simplex-chat/libbbs)) | `59a0f4bf` | BBS+ (`bbs_sha256_ciphersuite`), SHA-256, SHAKE256 |
-| `cbits/blst` submodule ([supranational/blst](https://github.com/supranational/blst)) | `db3defd0` | BLS12-381 (C and `build/assembly.S`, `-D__BLST_PORTABLE__`) |
-| direct-sqlcipher | git `f814ee68` | SQLCipher |
-| `openssl` CLI | system | Server CA and certificate key generation (`createServerX509_`) |
-
-## xftp-web (TypeScript)
-
-[xftp-web](../xftp-web/) reimplements a subset for the browser XFTP client. It has no AES-GCM, HKDF, SHA-3, MD5, X448 or sntrup761 code.
-
-| Primitive | Implementation | Haskell counterpart |
-|---|---|---|
-| Ed25519 sign, verify, keys | libsodium-wrappers-sumo (`crypto_sign_*`), [src/crypto/keys.ts](../xftp-web/src/crypto/keys.ts) | `C.sign'`, `C.verify'` |
-| Ed448 verify | `@noble/curves/ed448`, keys.ts `verifyEd448` | `C.verify'` |
-| X25519 | libsodium `crypto_scalarmult`, `crypto_box_keypair` | `C.dh'` |
-| SimpleX crypto_box, secretbox, tail-tag streaming | Salsa20 block function written in TypeScript, libsodium `crypto_core_hsalsa20` and `crypto_onetimeauth_*`, [src/crypto/secretbox.ts](../xftp-web/src/crypto/secretbox.ts) | `C.cryptoBox`, `LC.sbInit_` |
-| crypto_box authenticator | [src/protocol/client.ts](../xftp-web/src/protocol/client.ts) `cbAuthenticate`, `cbVerify` | `C.cbAuthenticate`, `C.cbVerify` |
-| SHA-256, SHA-512 | libsodium `crypto_hash_sha256`, `crypto_hash_sha512*`, [src/crypto/digest.ts](../xftp-web/src/crypto/digest.ts) | `C.sha256Hash`, `C.sha512Hash` |
-| Random | WebCrypto `crypto.getRandomValues`; libsodium for key generation | `C.randomBytes` |
-
-## Tests
-
-None of the tests below compares against published reference vectors (NIST, RFC 8032, RFC 7748, RFC 5869, NaCl, the sntrup761 draft or the BBS draft). Interoperability is tested between this repository's own implementations.
-
-| Area | Test module (hspec group) | Kind |
-|---|---|---|
-| Ed25519, Ed448, X25519 crypto_box, secretbox, lazy and tail-tag secretbox, AES-GCM 12-byte IV, X.509 key encoding, X.509 chains, sntrup761, BBS+, entitlements, padding | [tests/CoreTests/CryptoTests.hs](../tests/CoreTests/CryptoTests.hs) | Round-trip; fixed lengths for BBS+; fixed bytes for padding |
-| Double ratchet (X25519 and X448), PQ KEM agreement, AES-GCM 16-byte IV | [tests/AgentTests/DoubleRatchetTests.hs](../tests/AgentTests/DoubleRatchetTests.hs) | Round-trip; decoding of a stored v2 ratchet JSON |
-| Short links (HKDF info strings, SHA3-256 link key) | [tests/AgentTests/ShortLinkTests.hs](../tests/AgentTests/ShortLinkTests.hs) | Round-trip, tamper rejection |
-| File encryption | [tests/CoreTests/CryptoFileTests.hs](../tests/CoreTests/CryptoFileTests.hs) | Round-trip |
-| XRCP session (SHA3-256 hybrid, sb chain) | [tests/RemoteControl.hs](../tests/RemoteControl.hs) | End-to-end |
-| SMP authenticators, block encryption, `IdsHash` (MD5) | [tests/ServerTests.hs](../tests/ServerTests.hs) | End-to-end; with the PostgreSQL queue store this checks Haskell MD5 against pgcrypto |
-| Haskell and xftp-web: SHA-256/512, Ed25519, Ed448 identity proof, X25519, DER keys, crypto_box, secretbox, tail-tag, authenticator, file encryption | [tests/XFTPWebTests.hs](../tests/XFTPWebTests.hs) (`XFTP Web Client`) | Byte-identical cross-language output |

protocol/diagrams/xrcp/session.mmd

@@ -17,11 +17,11 @@ note over CC, HC: TLS handshake
 par
     note over CC: validate client X509 credentials
     CC->>CI: session code from tlsUnique
-    CI-->>CC: user confirmation (optional if known)
+    CI-->>CC: user confirmation
 and
     note over HC: validate server X509 credentials
     HC->>HI: session code from tlsUnique
-    HI-->>HC: user confirmation (optional if known)
+    HI-->>HC: user confirmation
 end
 
 note over CI, HI: 3. Session verification and protocol negotiation

protocol/pqdr.md

@@ -62,16 +62,14 @@ It is possible to reduce size overhead by using only one KEM agreement and makin
 
 ## Double ratchet with encrypted headers augmented with double PQ KEM
 
-Algorithm below assumes that in addition to shared secret from the initial key agreement, there will be an encapsulation key available from the initiating party, that sent its keys in the connection invitation to the joining party (see [agent protocol](./agent-protocol.md)). Following the double ratchet specification, the pseudo-code below names the joining party Alice and the initiating party Bob.
-
-Unlike X3DH prekey bundles, these keys are not reusable keys published for any party to use. The initiating party generates two X448 key pairs and, optionally, a sntrup761 KEM key pair for each connection, sends the public keys in the invitation, and deletes the stored private keys once the ratchet is initialized; only the second X448 private key and the agreed KEM key pair remain in the ratchet state as its initial ratchet keys. The joining party generates its keys when joining and keeps only its KEM key pair, in the ratchet state. The exception is a contact address that publishes ratchet keys in its link data: all requesters use these keys until the address owner rotates them, and the owner keeps the private keys of a few recent generations.
+Algorithm below assumes that in addition to shared secret from the initial key agreement, there will be an encapsulation key available from the party that published its keys (Bob).
 
 ### Initialization
 
 The double ratchet initialization is defined in pseudo-code. This pseudo-code is identical to Signal algorithm specification except for that parts that add post-quantum key agreement.
 
 ```
-// Alice (joining party) received Bob's keys in the invitation and initializes ratchet first
+// Alice obtained Bob's keys and initializes ratchet first
 def RatchetInitAlicePQ2HE(state, SK, bob_dh_public_key, shared_hka, shared_nhkb, bob_pq_kem_encapsulation_key):
     state.DHRs = GENERATE_DH()
     state.DHRr = bob_dh_public_key
@@ -91,7 +89,7 @@ def RatchetInitAlicePQ2HE(state, SK, bob_dh_public_key, shared_hka, shared_nhkb,
     state.HKr = None
     state.NHKr = shared_nhkb
 
-// Bob (initiating party) initializes ratchet second, having received Alice's first message
+// Bob initializes ratchet second, having received Alice's connection request
 def RatchetInitBobPQ2HE(state, SK, bob_dh_key_pair, shared_hka, shared_nhkb, bob_pq_kem_key_pair):
     state.DHRs = bob_dh_key_pair
     state.DHRr = None
@@ -212,8 +210,6 @@ The outer envelope contains the encrypted header (used as associated data for bo
 
 The message body is encrypted with AES-256-GCM using the message key derived from the sending chain key (`KDF_CK`). The associated data for body encryption is the concatenation of the ratchet associated data and the encoded encrypted header.
 
-`KDF_CK(CK)` is HKDF-SHA512 with empty salt, `CK` as input key material and info `"SimpleXChainRatchet"`, producing 96 bytes split into the next chain key (32 bytes), the message key (32 bytes), the message body IV (16 bytes, not transmitted) and `headerIV` (16 bytes). Both IVs are used as 16-byte AES-256-GCM IVs, not the 12-byte IVs recommended by NIST SP 800-38D, so the initial counter block is J0 = GHASH(IV || 0^64 || [128]_64) as defined there for non-96-bit IVs. WebCrypto and other conforming implementations compute it when given the full 16-byte IV; truncating the IV to 12 bytes produces different ciphertext.
-
 ```abnf
 encRatchetMessage = versionedLength encMessageHeader msgAuthTag encMsgBody
 ; encMessageHeader is used as associated data for body decryption: AD = rcAD || encMessageHeader
@@ -278,7 +274,7 @@ As SimpleX Messaging Protocol pads messages to a fixed size, using 16kb transpor
 
 Sharing the initial keys in case of SimpleX Chat it is equivalent to sharing the invitation link. As encapsulation key is large, it may be inconvenient to share it in the link in some contexts, e.g. when QR codes are used.
 
-It is possible to postpone sharing the encapsulation key until the first message from the joining party (confirmation message in SMP protocol). The upside here is that the invitation link size would not increase. The downside is that the user profile shared in this confirmation will not be encrypted with PQ-resistant algorithm.
+It is possible to postpone sharing the encapsulation key until the first message from Alice (confirmation message in SMP protocol), the party sending connection request. The upside here is that the invitation link size would not increase. The downside is that the user profile shared in this confirmation will not be encrypted with PQ-resistant algorithm.
 
 Another consideration is pairwise ratchets in groups. Key generation in sntrup761 is quite slow - on slow devices it can be as slow as 10-20 keys per second, so using this primitive in groups larger than 10-20 members would result in slow performance.
 

protocol/security.md

@@ -15,7 +15,7 @@ This document describes the cryptographic primitives and threat model for the Si
   - [SimpleX Messaging Protocol router that proxies the messages to another SMP router](#simplex-messaging-protocol-router-that-proxies-the-messages-to-another-smp-router)
   - [An attacker who obtained Alice's (decrypted) chat database](#an-attacker-who-obtained-alices-decrypted-chat-database)
   - [A user's contact](#a-users-contact)
-  - [An attacker who observes the initiating party showing an introduction message to the joining party](#an-attacker-who-observes-the-initiating-party-showing-an-introduction-message-to-the-joining-party)
+  - [An attacker who observes Alice showing an introduction message to Bob](#an-attacker-who-observes-alice-showing-an-introduction-message-to-bob)
   - [An attacker with Internet access](#an-attacker-with-internet-access)
 
 
@@ -37,8 +37,6 @@ This document describes the cryptographic primitives and threat model for the Si
   - AES-GCM AEAD cipher,
   - SHA512-based HKDF for key derivation.
 
-All primitives in use, their lengths, domain-separation strings and the policy for new code are listed in the [cryptographic primitive registry](./crypto-registry.md).
-
 
 ## Threat Model
 
@@ -170,7 +168,7 @@ All primitives in use, their lengths, domain-separation strings and the policy f
 
 *cannot:*
 
-- impersonate a sender and send messages to the user whose database was stolen, unless the database contains a new rotation queue that is not secured yet. Doing so requires also compromising the router (to place the message in the queue, that is possible until the Double-Ratchet advances forward) or the user's device at a subsequent time (to place the message in the database).
+- impersonate a sender and send messages to the user whose database was stolen. Doing so requires also compromising the router (to place the message in the queue, that is possible until the Double-Ratchet advances forward) or the user's device at a subsequent time (to place the message in the database).
 
 - undetectably communicate at the same time as Alice with her contacts. Doing so would result in the contact getting different messages with repeated IDs.
 
@@ -192,15 +190,15 @@ All primitives in use, their lengths, domain-separation strings and the policy f
 
 - cannot collaborate with another of the user's contacts to confirm they are communicating with the same user.
 
-### An attacker who observes the initiating party showing an introduction message to the joining party
+### An attacker who observes Alice showing an introduction message to Bob
 
 *can:*
 
-- Impersonate the joining party to the initiating party.
+- Impersonate Bob to Alice.
 
 *cannot:*
 
-- Impersonate the initiating party to the joining party.
+- Impersonate Alice to Bob.
 
 ### An attacker with Internet access
 

protocol/simplex-messaging.md

@@ -86,7 +86,7 @@ It's designed with the focus on communication security and integrity, under the
 
 It is designed as a low level protocol for other application protocols to solve the problem of secure and private message transmission, making [MITM attack][1] very difficult at any part of the message transmission system.
 
-This document describes SMP protocol version 23. Versions 1-5 are discontinued. The version history:
+This document describes SMP protocol version 22. Versions 1-5 are discontinued. The version history:
 
 - v1: binary protocol encoding
 - v2: message flags (used to control notifications)
@@ -109,7 +109,6 @@ This document describes SMP protocol version 23. Versions 1-5 are discontinued.
 - v20: public namespaces resolver (RSLV command, RNAME response) — direct or forwarded via PFWD
 - v21: server public information in handshake
 - v22: `RNAME` says whether a name can be registered, not only what it resolves to
-- v23: version in nonces of forwarded commands, random nonces for forwarded responses
 
 ## Introduction
 
@@ -1121,15 +1120,13 @@ When the client receives PKEY response it MUST validate that:
 - the fingerprint of the received certificate matches fingerprint in the router address - it mitigates MITM attack by proxy.
 - the router session key is correctly signed with the received certificate.
 
-`smpVersionRange` in `PKEY` is not signed.
-
 The proxy router may respond with error response in case the destination router is not available or in case it has an earlier version that does not support proxied commands.
 
 #### Send command via proxy
 
 Sender can send `SKEY` and `SEND` commands via proxy after obtaining the session ID with `PRXY` command (see [Request proxied session](#request-proxied-session)).
 
-Transmission sent to proxy router should use session ID as entity ID and use a random correlation ID of 24 bytes as a nonce for crypto_box encryption of transmission to the destination router. When `smpVersion` in `PFWD` is 23 or higher, the first 2 bytes of this nonce are XOR-ed with `smpVersion`. The random ephemeral X25519 key to encrypt transmission should be unique per command, and it should be combined with the key sent by the router in the handshake header to proxy and to the client in `PKEY` command.
+Transmission sent to proxy router should use session ID as entity ID and use a random correlation ID of 24 bytes as a nonce for crypto_box encryption of transmission to the destination router. The random ephemeral X25519 key to encrypt transmission should be unique per command, and it should be combined with the key sent by the router in the handshake header to proxy and to the client in `PKEY` command.
 
 Encrypted transmission should use the received session ID from the connection between proxy router and destination router in the authorized body.
 
@@ -1141,11 +1138,10 @@ commandKey = length x509encoded
 
 The proxy router will forward the encrypted transmission in `RFWD` command (see below).
 
-Having received the `RRES` response from the destination router, proxy router will forward `PRES` response to the client. `PRES` response should use the same correlation ID as `PFWD` command. The destination router will use this correlation ID increased by 1 as a nonce for encryption of the response. When `smpVersion` in `PFWD` is 23 or higher, the destination router uses a random nonce instead, and sends it before the encrypted response.
+Having received the `RRES` response from the destination router, proxy router will forward `PRES` response to the client. `PRES` response should use the same correlation ID as `PFWD` command. The destination router will use this correlation ID increased by 1 as a nonce for encryption of the response.
 
 ```abnf
-proxyResponse = %s"PRES" SP [responseNonce] <encrypted padded(forwardedResponse, 16226)>
-responseNonce = %s"0" / (%s"1" 24*24 OCTET) ; from v23
+proxyResponse = %s"PRES" SP <encrypted padded(forwardedResponse, 16226)>
 forwardedResponse = *OCTET ; client-encrypted SMP response, decrypted by client using per-command DH secret
 ```
 
@@ -1172,7 +1168,7 @@ The shared secret for encrypting transmission bodies between proxy router and de
 
 
 ```abnf
-relayResponse = %s"RRES" SP [responseNonce] <encrypted(responseTransmission)>
+relayResponse = %s"RRES" SP <encrypted(responseTransmission)>
 responseTransmission = fwdCorrId forwardedResponse
   ; fwdCorrId and forwardedResponse defined above in RFWD section
 ```

protocol/xrcp.md

@@ -71,7 +71,7 @@ The session invitation contains this data:
 
 Host application decrypts (except the first session) and validates the invitation:
 - Session signature is valid.
-- Timestamp of a multicast announcement is not earlier than 3660 seconds before and not later than 3600 seconds after the current time of the host. The host ignores announcements outside of this interval and continues listening.
+- Timestamp is within some window from the current time.
 - Long-term key signature is valid.
 - Long-term CA and signature key are the same as in the first session.
 - Some version in the offered range is supported.
@@ -121,15 +121,9 @@ During TLS handshake, parties validate certificate chains against previously kno
 
 ### Session verification and protocol negotiation
 
-Once TLS session is established, both the host and controller devices present a "session security code" to the user. The session security code must be a digest of tlsunique channel binding. As it is computed as a digest of the TLS handshake for both the controller and the host, it will validate that the same TLS certificates are used on both sides, and that the same TLS session is established, mitigating the possibility of MITM attack in the connection.
+Once TLS session is established, both the host and controller devices present a "session security code" to the user who must match them (e.g., visually or via QR code scan) and confirm on the host device. The session security code must be a digest of tlsunique channel binding. As it is computed as a digest of the TLS handshake for both the controller and the host, it will validate that the same TLS certificates are used on both sides, and that the same TLS session is established, mitigating the possibility of MITM attack in the connection.
 
-To verify the session, the user matches the codes (e.g., visually or via QR code scan) and confirms the session on the host device.
-
-The user MUST verify the first session with a new controller. The host stores the long-term identity of the controller (CA fingerprint and Ed25519 public key) only after this session is verified. A controller with the stored long-term identity is a known controller.
-
-The user MAY verify the subsequent sessions with a known controller. In a session that the host confirms without user action, the controller is authenticated only by its long-term identity stored in the first session (see [Threat model](#threat-model)). SimpleX Chat mobile apps require user verification of sessions with known controllers only when the user enables the "Verify connections" option.
-
-Once the session is confirmed, the host sends HELLO block to the controller.
+Once the session is confirmed by the user, the host sends HELLO block to the controller.
 
 XRCP blocks inside TLS are padded to 16384 bytes.
 
@@ -311,7 +305,7 @@ to receive: (rcvKey', sk, nonce) = HKDF(rcvKey, "SimpleXSbChain", 88)
 - prevent host and controller devices from establishing the session
 
 *cannot:*
-- same as passive adversary, provided that user visually verified session code out-of-band in the first session with the controller.
+- same as passive adversary, provided that user visually verified session code out-of-band.
 
 #### An active adversary with the access to the network:
 
@@ -330,15 +324,6 @@ to receive: (rcvKey', sk, nonce) = HKDF(rcvKey, "SimpleXSbChain", 88)
 *cannot:*
 - connect to the host or make host connect to itself.
 
-#### An active adversary with the access to the network who also obtained the long-term private keys of a known controller (e.g., from the controller device):
-
-*can:*
-- make host connect to itself instead of the controller.
-- access any data of the controlled host application, within the capabilities of the provided API, if the host confirms the session without user action.
-
-*cannot:*
-- access host application data, provided that user visually verified session code out-of-band.
-
 #### Compromised controller device:
 
 *can:*

scripts/resolver/.env

@@ -1,8 +1,5 @@
-# Copy to .env (next to docker-compose.yml) only to change a setting; without it
-# docker-compose.yml uses the values shown here.
-
 # ============================================================================
-# Chain settings.
+# Required settings — the stack will not start without these.
 # ============================================================================
 
 # Ethereum network: mainnet (the SNRC `.testing` contracts live on mainnet)
@@ -17,16 +14,9 @@ NETWORK=mainnet
 TRUSTED_NODE_URL=https://mainnet-checkpoint-sync.attestant.io
 
 # ============================================================================
-# Optional overrides — leave commented unless you need to change them.
+# Optional overrides — sensible defaults are baked into docker-compose.yml,
+# so leave these commented unless you need to change them.
 # ============================================================================
 
 # Nimbus NAT (default: any). For a stable public node set an explicit IP:
 #   NAT=extip:1.2.3.4        # your public IPv4: curl -s ifconfig.me
-
-# Resolver (defaults in the README's "Load and scaling" and "Logs" sections)
-#   SNRC_WORKERS=4                          # worker processes; default CPU count, at most 4
-#   SNRC_RPC_TIMEOUT=5                      # seconds per request to reth
-#   SNRC_LOG_FORMAT=json                    # default text (key=value)
-#   SNRC_LOG_COLOR=always                   # coloured `docker compose logs`
-#   SNRC_LOG_LEVEL=debug                    # also log health checks and idle connections
-#   SNRC_TRUSTED_PROXIES=172.16.0.0/12      # behind a reverse proxy on the host; see README

scripts/resolver/README.md

@@ -19,15 +19,15 @@ against **Ethereum mainnet** (where the `.testing` contracts live):
 
 ## 1. Configure
 
-The defaults in `docker-compose.yml` work as-is:
+Edit `.env` — the defaults work as-is; override only if needed:
 
 ```sh
 NETWORK=mainnet                                               # default
 TRUSTED_NODE_URL=https://mainnet-checkpoint-sync.attestant.io # default
 ```
 
-To override these or NAT, copy `.env.example` to `.env` and edit it; `.env` is
-not committed.
+Everything else (NAT) has a working default baked into `docker-compose.yml`;
+uncomment the hints in `.env` only to override.
 
 ## 2. Run
 
@@ -121,15 +121,6 @@ standalone for local dev (no Docker), via [`uv`](https://docs.astral.sh/uv/):
 uv run scripts/resolver/service/snrc-resolve.py  # defaults to local reth + mainnet .testing
 ```
 
-Tests and lint run from `scripts/resolver/service`:
-
-```sh
-uv run pytest
-uv run ruff check .
-```
-
-Dependencies are locked in `uv.lock`; the Docker image installs exactly those.
-
 Three routes, versioned separately from the protocol so each only changes when
 its own shape does:
 
@@ -252,7 +243,7 @@ wrong, `error` and `status` hold the same value, so one field is enough to read.
 
 `upstreamError` says only which exception type the RPC call raised. The text
 goes to the resolver's log instead, because `SNRC_RPC` can carry a provider key
-and the exception can carry the URL it failed on. It is also the answer
+and urlopen puts the URL it failed on into the message. It is also the answer
 when a registrar, controller or oracle address has no contract behind it: the
 empty reply is refused rather than read as zero, which would make every name
 look free.
@@ -383,87 +374,3 @@ here.
 To override any of them, set `SNRC_REGISTRY_<TLD>`, `SNRC_REGISTRAR_<TLD>` or
 `SNRC_CONTROLLER_<TLD>` on the `resolver` service in `docker-compose.yml`, or
 as env vars when you run the script directly.
-
-### Load and scaling
-
-A lookup reads the chain in at most three rounds: the name's status and
-registry entries, then its record from its resolver, then prices for a name
-that is free. The node runs the calls of a JSON-RPC batch one after another,
-so the contract reads of a round go to the chain as one `eth_call` to
-[Multicall3](https://github.com/mds1/multicall). A node that is slow for a
-moment therefore delays a lookup a few times, not once per read. Connections to
-the node are kept open and reused.
-
-The resolver answers HTTP/1.1, so each smp-server keeps its connections to it
-open instead of connecting for every lookup. An idle connection is closed after
-60 s; the smp-server drops its own idle ones after 30 s, so it closes them first.
-
-Each access log line ends with how long the request took, so slow requests
-show up in `docker compose logs resolver`.
-
-| Variable | Default | Meaning |
-|---|---|---|
-| `SNRC_WORKERS` | CPU count, at most 4 | processes sharing the port. If one exits, the others stop, so the container restarts |
-| `SNRC_RPC_TIMEOUT` | `5` | seconds to wait for each request to the node; the smp-server gives up after 3 |
-| `SNRC_MULTICALL` | `0xcA11bde05977b3631167028862bE2a173976CA11` | Multicall3 address. If it does not answer, each round is sent as a plain batch and the log says so once |
-
-### Logs
-
-Each event is one line: UTC time, level, event name, then `key=value` fields.
-
-```
-2026-09-26T08:06:19.992Z INFO  request  client=203.0.113.7 worker=12 method=GET path=/v2/resolve/[4fdd…].testing status=200 bytes=701 ms=35
-2026-09-26T08:06:20.051Z WARN  upstream_error  name=foobar.testing error=ConnectionRefusedError message="[Errno 111] Connection refused"
-```
-
-| Event | Level | Meaning |
-|---|---|---|
-| `listening` | info | started: address, workers, RPC endpoint, registries, trusted proxies |
-| `request` | info | one answered request; `/health` only at debug |
-| `upstream_error` | warn | a read from the node failed; the caller got 502 |
-| `multicall_unavailable` | warn | Multicall3 did not answer; rounds are sent as plain batches |
-| `client_gone` | warn | the caller hung up before the answer, usually an smp-server past its timeout |
-| `http_error` | warn | a malformed request; idle keep-alive timeouts only at debug |
-| `request_failed` | error | a request failed unexpectedly, with its traceback |
-| `worker_exited`, `worker_failed` | error | a worker stopped; the others stop too, so the container restarts |
-| `stopping` | info | stopped by a signal |
-
-| Variable | Default | Meaning |
-|---|---|---|
-| `SNRC_LOG_FORMAT` | `text` | `text` (`key=value`) or `json`, one object per line |
-| `SNRC_LOG_COLOR` | `auto` | `auto` colours only a terminal, `always`, `never`. Docker output is no terminal, so set `always` for coloured `docker compose logs` |
-| `SNRC_LOG_LEVEL` | `info` | `debug` also logs health checks and idle connections closing |
-| `SNRC_TRUSTED_PROXIES` | none | addresses or CIDRs of reverse proxies whose `X-Forwarded-For` names the client |
-
-With docker compose, set these, and those in "Load and scaling", in `.env`
-(`.env.example` lists them).
-
-Behind a reverse proxy such as Caddy on the host, the resolver sees the Docker
-network's gateway rather than the client. Trust that gateway, and the logged
-client is the last `X-Forwarded-For` address no trusted proxy added, so a caller
-through the proxy cannot claim another address. Everything else on the host that
-connects to `127.0.0.1:8000`, the smp-servers included, arrives through the same
-gateway and could set the logged address too; run the proxy in the compose network
-and trust only its address to avoid that.
-
-The gateway is
-`docker network inspect resolver_default --format '{{(index .IPAM.Config 0).Gateway}}'`,
-with the network named after the compose project. It changes when the network is
-recreated, as `docker compose down` does, so trust one of, in `.env`:
-
-- `SNRC_TRUSTED_PROXIES=172.16.0.0/12`: Docker's default pools for compose
-  networks, whatever subnet it picks. This also trusts every other container on the
-  host. Add the gateway too if Docker ever gives the network a `192.168.x.x` one.
-- a pinned subnet, so the gateway stays fixed, and only that gateway:
-
-  ```yaml
-  networks:
-    default:
-      ipam:
-        config:
-          - subnet: 172.30.0.0/24
-            gateway: 172.30.0.1
-  ```
-
-  in `docker-compose.yml`, with `SNRC_TRUSTED_PROXIES=172.30.0.1`, on a subnet no
-  other network on the host uses.

scripts/resolver/docker-compose.yml

@@ -38,14 +38,14 @@ services:
       - sh
       - -c
       - |
-        if [ -d /home/user/nimbus-eth2/build/data/${NETWORK:-mainnet}/db ]; then
+        if [ -d /home/user/nimbus-eth2/build/data/${NETWORK}/db ]; then
           echo "Nimbus data dir already initialised — skipping checkpoint sync";
           exit 0;
         fi;
         /home/user/nimbus-eth2/build/nimbus_beacon_node trustedNodeSync \
-          --network=${NETWORK:-mainnet} \
-          --data-dir=/home/user/nimbus-eth2/build/data/${NETWORK:-mainnet} \
-          --trusted-node-url=${TRUSTED_NODE_URL:-https://mainnet-checkpoint-sync.attestant.io} \
+          --network=${NETWORK} \
+          --data-dir=/home/user/nimbus-eth2/build/data/${NETWORK} \
+          --trusted-node-url=${TRUSTED_NODE_URL} \
           --backfill=false
     restart: "no"
 
@@ -69,8 +69,8 @@ services:
           echo "Reth data already initialised — skipping snapshot download";
           exit 0;
         fi;
-        echo "Downloading Reth ${NETWORK:-mainnet} --minimal snapshot...";
-        reth download --datadir /data --chain ${NETWORK:-mainnet} --minimal && \
+        echo "Downloading Reth ${NETWORK} --minimal snapshot...";
+        reth download --datadir /data --chain ${NETWORK} --minimal && \
         touch /data/.snapshot-done && \
         echo "Snapshot download complete"
     restart: "no"
@@ -92,7 +92,7 @@ services:
     command: >
       node
       --datadir /data
-      --chain ${NETWORK:-mainnet}
+      --chain ${NETWORK}
       --minimal
       --authrpc.jwtsecret /jwt/jwt.hex
       --authrpc.addr 0.0.0.0 --authrpc.port 8551
@@ -117,8 +117,8 @@ services:
       - "9000:9000/udp"
       - "127.0.0.1:5052:5052"
     command: >
-      --network=${NETWORK:-mainnet}
-      --data-dir=/home/user/nimbus-eth2/build/data/${NETWORK:-mainnet}
+      --network=${NETWORK}
+      --data-dir=/home/user/nimbus-eth2/build/data/${NETWORK}
       --el=http://reth:8551
       --jwt-secret=/jwt/jwt.hex
       --non-interactive
@@ -131,7 +131,6 @@ services:
   # smp-server points its [NAMES] resolver_endpoint at this URL.
   # To change the host port, edit the LEFT side of the port mapping below.
   resolver:
-    image: snrc-resolve:local
     build:
       context: ./service
       dockerfile: Dockerfile
@@ -157,18 +156,8 @@ services:
       # SNRC_REGISTRAR_SIMPLEX: 0x...
       # SNRC_CONTROLLER_TESTING: 0x...
       # SNRC_CONTROLLER_SIMPLEX: 0x...
-      # Set in .env (see .env.example); unset or empty means the resolver's default.
-      SNRC_WORKERS: ${SNRC_WORKERS:-}
-      SNRC_RPC_TIMEOUT: ${SNRC_RPC_TIMEOUT:-}
-      SNRC_LOG_FORMAT: ${SNRC_LOG_FORMAT:-}
-      SNRC_LOG_COLOR: ${SNRC_LOG_COLOR:-}
-      SNRC_LOG_LEVEL: ${SNRC_LOG_LEVEL:-}
-      SNRC_TRUSTED_PROXIES: ${SNRC_TRUSTED_PROXIES:-}
     ports:
       - "127.0.0.1:8000:8000"
-    # a line per lookup; the local driver keeps 5 rotated files of 20 MB
-    logging:
-      driver: local
     restart: unless-stopped
 
 volumes:

scripts/resolver/service/.dockerignore

@@ -1,5 +0,0 @@
-.venv
-**/__pycache__
-.pytest_cache
-.ruff_cache
-test_snrc_resolve.py

scripts/resolver/service/.python-version

@@ -1 +0,0 @@
-3.13

scripts/resolver/service/Dockerfile

@@ -1,10 +1,9 @@
 # syntax=docker/dockerfile:1.7
 # ---------- builder ----------
-# The official uv image (Astral) on top of a slim Python base installs the
-# locked dependencies into a portable .venv for the runtime stage.
-# Pinned to the uv that wrote uv.lock (its bookworm images stopped at 0.9.30), on the
-# runtime's Debian release, so the .venv's Python path exists there.
-FROM ghcr.io/astral-sh/uv:0.12.16-python3.13-trixie-slim AS builder
+# Use the official uv image (Astral) on top of a slim Python base.
+# uv resolves and installs the lockfile-free pyproject.toml in seconds and
+# produces a portable .venv we can copy into the runtime stage.
+FROM ghcr.io/astral-sh/uv:python3.13-bookworm-slim AS builder
 
 ENV UV_LINK_MODE=copy \
     UV_COMPILE_BYTECODE=1 \
@@ -13,17 +12,17 @@ ENV UV_LINK_MODE=copy \
 
 WORKDIR /app
 
-# Dependencies first (separate layer), exactly as locked: script edits don't bust this cache.
-COPY pyproject.toml uv.lock .python-version ./
+# Install deps first (separate layer) — script edits won't bust this cache.
+COPY pyproject.toml ./
 RUN --mount=type=cache,target=/root/.cache/uv \
-    uv sync --frozen --no-dev --no-install-project
+    uv sync --no-dev --no-install-project
 
 # Script is added after the dep layer for cache friendliness.
 COPY snrc-resolve.py ./
 
 # ---------- runtime ----------
 # Slim runtime — only the venv + script. No uv, no apt.
-FROM python:3.13-slim-trixie AS runtime
+FROM python:3.13-slim AS runtime
 
 ENV PYTHONUNBUFFERED=1 \
     PYTHONDONTWRITEBYTECODE=1 \
@@ -34,15 +33,15 @@ RUN groupadd --system --gid 10001 snrc && \
     useradd  --system --uid 10001 --gid snrc --no-create-home --shell /usr/sbin/nologin snrc
 
 WORKDIR /app
-# owned by root, so the service cannot rewrite its own code
-COPY --from=builder /app /app
+COPY --from=builder --chown=snrc:snrc /app /app
 
 USER snrc:snrc
 
 EXPOSE 8000
 
-# Liveness check hits the script's own /health route. Three failures mark the
-# container unhealthy; compose does not restart it for that, but `docker ps` shows it.
+# Liveness check hits the script's own /health route. ThreadingHTTPServer is
+# fast enough that 3s is generous for a localhost probe; restart if it stops
+# responding entirely.
 HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
     CMD ["python", "-c", "import urllib.request, sys; sys.exit(0 if urllib.request.urlopen('http://127.0.0.1:8000/health', timeout=3).status == 200 else 1)"]
 

scripts/resolver/service/pyproject.toml

@@ -9,14 +9,5 @@ dependencies = [
   "eth-hash[pycryptodome]>=0.7",
 ]
 
-[dependency-groups]
-dev = [
-  "pytest>=8",
-  "ruff>=0.6",
-]
-
 [tool.uv]
 package = false
-
-[tool.ruff.lint]
-select = ["E9", "F", "B"]

scripts/resolver/service/snrc-resolve.py

@@ -46,15 +46,6 @@ Environment:
                          (default: mainnet for .testing, empty for .simplex)
   SNRC_PORT              Listen port (default: 8000)
   SNRC_BIND              Bind address (default: 0.0.0.0)
-  SNRC_WORKERS           Worker processes sharing the port (default: CPU count, at most 4)
-  SNRC_RPC_TIMEOUT       Seconds to wait for each RPC request (default: 5)
-  SNRC_MULTICALL         Multicall3 contract that runs a round of reads as one call
-                         (default: 0xcA11bde05977b3631167028862bE2a173976CA11)
-  SNRC_LOG_FORMAT        text (key=value) or json (default: text)
-  SNRC_LOG_COLOR         auto (on a terminal), always or never (default: auto)
-  SNRC_LOG_LEVEL         debug, info, warning or error (default: info)
-  SNRC_TRUSTED_PROXIES   Comma-separated addresses or CIDRs of reverse proxies whose
-                         X-Forwarded-For names the client (default: none)
 
 Each TLD is a separate SNRC deployment with its own ENSRegistry; the
 resolver dispatches by the queried name's rightmost label.
@@ -73,45 +64,19 @@ Unrecognised payloads fall back to `0x`-prefixed raw hex.
 """
 
 import hashlib
-import ipaddress
 import json
-import logging
 import os
-import queue
-import signal
-import socket
 import sys
-import threading
 import time
-from contextlib import contextmanager
-from datetime import datetime, timezone
-from functools import lru_cache
-from http.client import BadStatusLine, HTTPConnection, HTTPSConnection
 from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
-from urllib.error import HTTPError
 from urllib.parse import unquote, urlparse
+from urllib.request import Request, urlopen
 
 from eth_hash.auto import keccak
 
 RPC = os.environ.get("SNRC_RPC", "http://127.0.0.1:8545")
 BIND = os.environ.get("SNRC_BIND", "0.0.0.0")
 PORT = int(os.environ.get("SNRC_PORT", "8000"))
-# The smp-server gives up after 3 s, so a slower call only holds a thread.
-RPC_TIMEOUT_S = float(os.environ.get("SNRC_RPC_TIMEOUT", "") or 5)
-# The node and the beacon client usually share the host, so not every core.
-MAX_DEFAULT_WORKERS = 4
-WORKERS = int(os.environ.get("SNRC_WORKERS", "") or min(MAX_DEFAULT_WORKERS, os.cpu_count() or 1))
-# Multicall3, at this address on mainnet and most chains. A node runs a JSON-RPC
-# batch one call after another, so a round of reads is sent as one eth_call.
-MULTICALL = os.environ.get("SNRC_MULTICALL", "") or "0xcA11bde05977b3631167028862bE2a173976CA11"
-LOG_FORMAT = os.environ.get("SNRC_LOG_FORMAT", "") or "text"
-LOG_COLOR = os.environ.get("SNRC_LOG_COLOR", "") or "auto"
-LOG_LEVEL = os.environ.get("SNRC_LOG_LEVEL", "") or "info"
-# Peers whose X-Forwarded-For is believed, such as the Docker gateway a reverse proxy on the host
-# connects through. Anyone else could put any address there.
-TRUSTED_PROXIES = tuple(
-    ipaddress.ip_network(p.strip(), strict=False) for p in os.environ.get("SNRC_TRUSTED_PROXIES", "").split(",") if p.strip()
-)
 
 # Each TLD is its own SNRC deployment with its own ENSRegistry. Dispatch
 # happens on the rightmost label of the queried name. Empty / unset means
@@ -156,291 +121,34 @@ COIN_ETH = 60
 COIN_BTC = 0
 COIN_XMR = 128
 COIN_DOT = 354
-RECORD_COINS = (COIN_ETH, COIN_BTC, COIN_XMR, COIN_DOT)
 
 ZERO_ADDR = "0x0000000000000000000000000000000000000000"
 
 # The registry prices in attoUSD (1e-18 USD); the protocol carries US cents.
 
 
-# ---------- Logging ----------
-
-LOGGER = logging.getLogger("snrc_resolve")
-LEVEL_NAMES = {logging.DEBUG: "DEBUG", logging.INFO: "INFO", logging.WARNING: "WARN", logging.ERROR: "ERROR"}
-# ANSI SGR codes
-DIM, BOLD, GREEN, YELLOW, RED = "2", "1", "32", "33", "31"
-LEVEL_COLORS = {"DEBUG": DIM, "INFO": GREEN, "WARN": YELLOW, "ERROR": RED}
-STATUS_COLORS = {2: GREEN, 3: GREEN, 4: YELLOW, 5: RED}
-
-
-def log_event(level: int, name: str, /, exc_info=None, **fields):
-    LOGGER.log(level, name, exc_info=exc_info, extra={"fields": fields})
-
-
-def _log_time(record: logging.LogRecord) -> str:
-    return datetime.fromtimestamp(record.created, timezone.utc).isoformat(timespec="milliseconds").replace("+00:00", "Z")
-
-
-def _log_value(value) -> str:
-    """A logfmt value: bare when it cannot be misread, JSON-quoted otherwise."""
-    if value is None:
-        return "-"
-    s = str(value)
-    if not s or any(c in s for c in ' ="\\') or not s.isprintable():
-        return json.dumps(s)
-    return s
-
-
-class TextFormatter(logging.Formatter):
-    def __init__(self, color: bool):
-        super().__init__()
-        self.color = color
-
-    def _paint(self, code: str, text: str) -> str:
-        return f"\033[{code}m{text}\033[0m" if self.color and code else text
-
-    def format(self, record: logging.LogRecord) -> str:
-        level = LEVEL_NAMES.get(record.levelno, record.levelname)
-        fields = " ".join(
-            self._paint(DIM, f"{k}=") + self._paint(STATUS_COLORS.get(v // 100, "") if k == "status" and isinstance(v, int) else "", _log_value(v))
-            for k, v in getattr(record, "fields", {}).items()
-        )
-        line = f"{self._paint(DIM, _log_time(record))} {self._paint(LEVEL_COLORS.get(level, ''), f'{level:<5}')} {self._paint(BOLD, record.getMessage())}"
-        if fields:
-            line += "  " + fields
-        if record.exc_info:
-            line += "\n" + self.formatException(record.exc_info)
-        return line
-
-
-class JsonFormatter(logging.Formatter):
-    def format(self, record: logging.LogRecord) -> str:
-        out = {
-            "time": _log_time(record),
-            "level": LEVEL_NAMES.get(record.levelno, record.levelname).lower(),
-            "event": record.getMessage(),
-            **getattr(record, "fields", {}),
-        }
-        if record.exc_info:
-            out["exception"] = self.formatException(record.exc_info)
-        return json.dumps(out, default=str)
-
-
-def setup_logging(stream=None):
-    """Sends the resolver's events to stderr in the configured format."""
-    stream = stream or sys.stderr
-    if LOG_FORMAT not in ("text", "json"):
-        raise ValueError(f"SNRC_LOG_FORMAT must be text or json, not {LOG_FORMAT!r}")
-    if LOG_COLOR not in ("auto", "always", "never"):
-        raise ValueError(f"SNRC_LOG_COLOR must be auto, always or never, not {LOG_COLOR!r}")
-    level = logging.getLevelName(LOG_LEVEL.upper())
-    if not isinstance(level, int):
-        raise ValueError(f"SNRC_LOG_LEVEL must be debug, info, warning or error, not {LOG_LEVEL!r}")
-    color = LOG_COLOR == "always" or (LOG_COLOR == "auto" and stream.isatty())
-    handler = logging.StreamHandler(stream)
-    handler.setFormatter(JsonFormatter() if LOG_FORMAT == "json" else TextFormatter(color))
-    LOGGER.handlers[:] = [handler]
-    LOGGER.setLevel(level)
-    LOGGER.propagate = False
-
-
 # ---------- RPC + ABI helpers (mirrors ens-lookup.py shape) ----------
 
-RPC_URL = urlparse(RPC)
-# Set a non-default User-Agent; Cloudflare-fronted public RPCs (drpc,
-# publicnode, etc.) reject `Python-urllib/3.x` with 403.
-RPC_HEADERS = {"Content-Type": "application/json", "User-Agent": "snrc-resolve/1.0"}
-
-# Idle keep-alive connections to SNRC_RPC. A connection per call costs most of
-# a lookup's CPU and leaves a TIME_WAIT socket per call, which exhausts local
-# ports at a few dozen lookups per second.
-# Idle connections kept per worker; more are closed after use. 4 workers stay well
-# under reth's default limit of 500 connections.
-RPC_POOL_SIZE = 32
-_rpc_pool = queue.LifoQueue(maxsize=RPC_POOL_SIZE)
-
-
-def _new_rpc_connection():
-    conn_class = HTTPSConnection if RPC_URL.scheme == "https" else HTTPConnection
-    return conn_class(RPC_URL.hostname, RPC_URL.port, timeout=RPC_TIMEOUT_S)
-
-
-def _post_rpc(conn, body: bytes) -> bytes:
-    path = (RPC_URL.path or "/") + (f"?{RPC_URL.query}" if RPC_URL.query else "")
-    conn.request("POST", path, body, RPC_HEADERS)
-    res = conn.getresponse()
-    data = res.read()
-    # HTTPError, as urlopen raised: RuntimeError means the call itself failed
-    if not 200 <= res.status < 300:
-        raise HTTPError(RPC, res.status, res.reason, res.headers, None)
-    return data
-
-
-def _post_pooled(conn, body: bytes) -> bytes:
-    try:
-        data = _post_rpc(conn, body)
-    except BaseException:
-        conn.close()
-        raise
-    try:
-        _rpc_pool.put_nowait(conn)
-    except queue.Full:
-        conn.close()
-    return data
-
-
-def _send_rpc(payload) -> object:
-    body = json.dumps(payload).encode()
-    try:
-        idle = _rpc_pool.get_nowait()
-    except queue.Empty:
-        return json.loads(_post_pooled(_new_rpc_connection(), body))
-    try:
-        return json.loads(_post_pooled(idle, body))
-    except (ConnectionError, BadStatusLine):
-        # the node closed the idle connection; every call is a read, so resending is safe
-        return json.loads(_post_pooled(_new_rpc_connection(), body))
-
-
-# Reads prefetched for the request being answered, keyed by _read_key. Only set
-# inside request_reads(), so code called outside a request reads one call at a time.
-_request = threading.local()
-_UNREAD = object()
-
-
-def _read_key(method, params) -> str:
-    return method + json.dumps(params, sort_keys=True)
-
-
-@contextmanager
-def request_reads():
-    _request.reads = {}
-    try:
-        yield
-    finally:
-        del _request.reads
-
-
 def rpc(method, params):
-    reads = getattr(_request, "reads", None)
-    if reads is not None:
-        read = reads.get(_read_key(method, params), _UNREAD)
-        if isinstance(read, RuntimeError):
-            raise read
-        if read is not _UNREAD:
-            return read
-    res = _send_rpc({"jsonrpc": "2.0", "method": method, "params": params, "id": 1})
+    body = json.dumps(
+        {"jsonrpc": "2.0", "method": method, "params": params, "id": 1}
+    ).encode()
+    # Set a non-default User-Agent; Cloudflare-fronted public RPCs (drpc,
+    # publicnode, etc.) reject `Python-urllib/3.x` with 403.
+    req = Request(
+        RPC,
+        data=body,
+        headers={
+            "Content-Type": "application/json",
+            "User-Agent": "snrc-resolve/1.0",
+        },
+    )
+    res = json.loads(urlopen(req, timeout=15).read())
     if "error" in res:
         raise RuntimeError(res["error"])
     return res["result"]
 
 
-def _send_batch(requests):
-    """Answers of a JSON-RPC batch in request order, None for a request left
-    unanswered; all None when the node does not batch."""
-    res = _send_rpc([{"jsonrpc": "2.0", "id": i, "method": m, "params": p} for i, (m, p) in enumerate(requests)])
-    # a node that does not batch answers with a single error object
-    by_id = {r.get("id"): r for r in res if isinstance(r, dict)} if isinstance(res, list) else {}
-    return [by_id.get(i) for i in range(len(requests))]
-
-
-def _is_latest_call(method, params) -> bool:
-    return method == "eth_call" and params[1] == "latest"
-
-
-_multicall_failed_logged = False
-
-
-def _remember(reads, requests, answers):
-    for (m, p), r in zip(requests, answers, strict=True):
-        if r is not None and ("result" in r or "error" in r):
-            reads[_read_key(m, p)] = RuntimeError(r["error"]) if "error" in r else r["result"]
-
-
-def prefetch(requests):
-    """Sends reads the request will make in one round trip, with its contract
-    reads as one multicall. A read left unanswered is made on its own when the
-    code gets to it."""
-    global _multicall_failed_logged
-    reads = getattr(_request, "reads", None)
-    if reads is None:
-        return
-    todo = [(m, p) for m, p in requests if _read_key(m, p) not in reads]
-    if len(todo) < 2:
-        return
-    calls = [(m, p) for m, p in todo if _is_latest_call(m, p)]
-    if len(calls) < 2:
-        _remember(reads, todo, _send_batch(todo))
-        return
-    others = [(m, p) for m, p in todo if not _is_latest_call(m, p)]
-    multicall = eth_call_read(MULTICALL, encode_aggregate3([(p[0]["to"], p[0]["data"]) for _, p in calls]))
-    answers = _send_batch(others + [multicall])
-    if all(r is None for r in answers):
-        return
-    _remember(reads, others, answers[:-1])
-    try:
-        result = (answers[-1] or {}).get("result")
-        if not isinstance(result, str):
-            raise ValueError(f"multicall answered {answers[-1]!r}")
-        results = decode_aggregate3(result)
-        if len(results) != len(calls):
-            raise ValueError("multicall answered a different number of calls")
-    except (KeyError, TypeError, ValueError) as e:
-        if not _multicall_failed_logged:
-            _multicall_failed_logged = True
-            log_event(logging.WARNING, "multicall_unavailable", multicall=MULTICALL, error=repr(e), fallback="batch")
-        _remember(reads, calls, _send_batch(calls))
-        return
-    for (m, p), (success, data) in zip(calls, results, strict=True):
-        reads[_read_key(m, p)] = "0x" + data.hex() if success else RuntimeError("execution reverted")
-
-
-AGGREGATE3 = "0x82ad56cb"  # aggregate3((address,bool,bytes)[])
-
-
-def encode_aggregate3(calls) -> str:
-    """Calldata for Multicall3.aggregate3 with every call allowed to fail."""
-    tuples = []
-    for to, data in calls:
-        b = bytes.fromhex(data[2:])
-        tuples.append(
-            int(to, 16).to_bytes(32, "big")
-            + (1).to_bytes(32, "big")
-            + (0x60).to_bytes(32, "big")
-            + len(b).to_bytes(32, "big")
-            + b
-            + b"\x00" * ((-len(b)) % 32)
-        )
-    offsets, at = [], 32 * len(tuples)
-    for t in tuples:
-        offsets.append(at.to_bytes(32, "big"))
-        at += len(t)
-    body = (0x20).to_bytes(32, "big") + len(tuples).to_bytes(32, "big") + b"".join(offsets) + b"".join(tuples)
-    return AGGREGATE3 + body.hex()
-
-
-def decode_aggregate3(hex_data: str):
-    """Multicall3.aggregate3's (bool success, bytes returnData)[]."""
-    raw = bytes.fromhex(hex_data[2:] if hex_data.startswith("0x") else hex_data)
-
-    def word(at: int) -> int:
-        if at + 32 > len(raw):
-            raise ValueError("multicall answer is truncated")
-        return int.from_bytes(raw[at:at + 32], "big")
-
-    array = word(0)
-    base = array + 32
-    out = []
-    for i in range(word(array)):
-        item = base + word(base + 32 * i)
-        data = item + word(item + 32)
-        length = word(data)
-        if data + 32 + length > len(raw):
-            raise ValueError("multicall answer is truncated")
-        out.append((word(item) != 0, raw[data + 32:data + 32 + length]))
-    return out
-
-
 def namehash(name: str) -> bytes:
     node = b"\x00" * 32
     if name:
@@ -476,14 +184,11 @@ def node_of(name: str) -> bytes:
 # ---------- Registration status ----------
 
 
-BLOCK_READ = ("eth_getBlockByNumber", ["latest", False])
-
-
 def head_block():
     """How far behind the node is. Unlike expiry, this is the one thing that has
     to be measured against the host clock: a node that stops still has a block."""
     try:
-        block = rpc(*BLOCK_READ)
+        block = rpc("eth_getBlockByNumber", ["latest", False])
         return {
             "blockNumber": decode_uint(block["number"]),
             "chainLagSeconds": int(time.time()) - decode_uint(block["timestamp"]),
@@ -494,13 +199,13 @@ def head_block():
 
 def chain_now() -> int:
     """Expiry is compared against the block timestamp, never the host clock."""
-    block = rpc(*BLOCK_READ)
+    block = rpc("eth_getBlockByNumber", ["latest", False])
     return decode_uint(block["timestamp"])
 
 
 def grace_period(registrar: str) -> int:
     """A deployment can configure a different window, so it is read on chain."""
-    return decode_uint(eth_call(*grace_call(registrar)))
+    return decode_uint(eth_call(registrar, selector("GRACE_PERIOD()")))
 
 
 def expiry_status(expires: int, grace: int, now: int) -> str:
@@ -520,7 +225,8 @@ def reservation_reason(tld: str, token: int) -> int:
     controller = CONTROLLERS.get(tld)
     if not controller:
         return 0
-    return decode_uint(eth_call(*reserved_call(controller, token)))
+    raw = eth_call(controller, selector("reservedNames(bytes32)") + encode_uint(token))
+    return decode_uint(raw)
 
 
 def pricing_params(tld: str):
@@ -529,8 +235,7 @@ def pricing_params(tld: str):
     controller = CONTROLLERS.get(tld)
     if not controller:
         return None
-    prefetch([eth_call_read(*prices_call(controller)), eth_call_read(*min_length_call(controller))])
-    oracle = decode_address(eth_call(*prices_call(controller)))
+    oracle = decode_address(eth_call(controller, selector("prices()")))
     if oracle == ZERO_ADDR:
         return None
     try:
@@ -542,8 +247,6 @@ def pricing_params(tld: str):
 
 
 SECONDS_PER_YEAR = 31536000
-# an ENS-shaped oracle prices names by length up to six letters
-LETTER_TIERS = range(1, 7)
 ATTO_PER_CENT = 10**16
 
 
@@ -552,15 +255,13 @@ def read_oracle_prices(controller: str, oracle: str):
     protocol carries. An ENS-shaped oracle prices in attoUSD per second and
     charges a premium on lapsed names that it does not expose, so a quote from
     it is only safe for a name that was never registered."""
-    # either oracle shape is answered in the same round trip
-    prefetch([eth_call_read(*prices_call(oracle))] + [eth_call_read(*letter_price_call(oracle, n)) for n in LETTER_TIERS])
     try:
-        base, tiers = decode_prices(eth_call(*prices_call(oracle)))
+        base, tiers = decode_prices(eth_call(oracle, selector("prices()")))
         premium_unknown = False
     except RuntimeError:
         base, tiers = decode_letter_prices(oracle)
         premium_unknown = True
-    min_len = decode_uint(eth_call(*min_length_call(controller)))
+    min_len = decode_uint(eth_call(controller, selector("minCharLength()")))
     return {
         # lengths the registry refuses are left out rather than priced at zero
         "registrationPrices": {n: c for n, c in tiers.items() if n >= min_len},
@@ -576,9 +277,9 @@ def decode_letter_prices(oracle: str):
     the six-letter tier stops at five, and charges its highest tier for anything
     longer, which is what basePrice means here."""
     tiers = {}
-    for n in LETTER_TIERS:
+    for n in range(1, 7):
         try:
-            rate = decode_uint(eth_call(*letter_price_call(oracle, n)))
+            rate = decode_uint(eth_call(oracle, selector(f"price{n}Letter()")))
         except RuntimeError:
             if n <= 5:
                 raise
@@ -600,9 +301,6 @@ def decode_prices(hex_data: str):
     base = int.from_bytes(raw[:32], "big")
     at = int.from_bytes(raw[32:64], "big")
     count = int.from_bytes(raw[at:at + 32], "big")
-    # the count comes from the answer, so it is checked against the answer's length
-    if at + 32 + count * 64 > len(raw):
-        raise RuntimeError("prices(): short response")
     tiers = {}
     for i in range(count):
         item = at + 32 + i * 64
@@ -630,7 +328,9 @@ def name_status(name: str):
     # The 2LD's label is that key at any depth. node_of decodes a bracket only
     # in a two-label name, so a bracket subname gets a status but no record.
     token = label_token(labels[-2])
-    expires = decode_uint(eth_call(*expires_call(registrar, token)))
+    expires = decode_uint(
+        eth_call(registrar, selector("nameExpires(uint256)") + encode_uint(token))
+    )
     grace = grace_period(registrar) if expires else 0
     now = chain_now()
     status = expiry_status(expires, grace, now)
@@ -658,17 +358,12 @@ def name_status(name: str):
     return out
 
 
-@lru_cache(maxsize=None)
 def selector(signature: str) -> str:
     return "0x" + keccak(signature.encode())[:4].hex()
 
 
-def eth_call_read(to: str, data: str):
-    return "eth_call", [{"to": to, "data": data}, "latest"]
-
-
 def eth_call(to: str, data: str) -> str:
-    result = rpc(*eth_call_read(to, data))
+    result = rpc("eth_call", [{"to": to, "data": data}, "latest"])
     if result == "0x":
         raise RuntimeError(f"empty return from {to}: no contract at that address?")
     return result
@@ -690,7 +385,7 @@ def registered_label(registrar: str, token: int):
     """The plaintext label the registrar recorded at registration, keyed by the
     hash of that label. None when the name was registered without
     registerWithLabel, so the registrar cannot name it."""
-    raw = decode_bytes(eth_call(*label_call(registrar, token)))
+    raw = decode_bytes(eth_call(registrar, selector("labelOf(uint256)") + encode_uint(token)))
     return raw.decode("utf-8", errors="replace") if raw else None
 
 
@@ -732,7 +427,7 @@ def encode_text_call(node: bytes, key: str) -> str:
 
 
 def text(resolver: str, node: bytes, key: str) -> str:
-    raw = decode_bytes(eth_call(*text_call(resolver, node, key)))
+    raw = decode_bytes(eth_call(resolver, encode_text_call(node, key)))
     return raw.decode("utf-8", errors="replace") if raw else ""
 
 
@@ -751,7 +446,7 @@ def addr_multicoin(resolver: str, node: bytes, coin_type: int):
     payload doesn't match any recognised on-chain shape. Returns None when
     the record is unset."""
     try:
-        raw = decode_bytes(eth_call(*addr_call(resolver, node, coin_type)))
+        raw = decode_bytes(eth_call(resolver, encode_addr_multicoin_call(node, coin_type)))
     except RuntimeError:
         return None
     if not raw:
@@ -770,81 +465,6 @@ def addr_multicoin(resolver: str, node: bytes, coin_type: int):
         return "0x" + raw.hex()
 
 
-# ---------- Contract calls, as (to, data) ----------
-# Shared by the reads and prefetch, so a prefetched read is found by the code that makes it.
-
-
-def expires_call(registrar: str, token: int):
-    return registrar, selector("nameExpires(uint256)") + encode_uint(token)
-
-
-def grace_call(registrar: str):
-    return registrar, selector("GRACE_PERIOD()")
-
-
-def label_call(registrar: str, token: int):
-    return registrar, selector("labelOf(uint256)") + encode_uint(token)
-
-
-def reserved_call(controller: str, token: int):
-    return controller, selector("reservedNames(bytes32)") + encode_uint(token)
-
-
-def prices_call(contract: str):
-    return contract, selector("prices()")
-
-
-def letter_price_call(oracle: str, letters: int):
-    return oracle, selector(f"price{letters}Letter()")
-
-
-def min_length_call(controller: str):
-    return controller, selector("minCharLength()")
-
-
-def resolver_call(registry: str, node: bytes):
-    return registry, selector("resolver(bytes32)") + node.hex()
-
-
-def owner_call(registry: str, node: bytes):
-    return registry, selector("owner(bytes32)") + node.hex()
-
-
-def text_call(resolver: str, node: bytes, key: str):
-    return resolver, encode_text_call(node, key)
-
-
-def addr_call(resolver: str, node: bytes, coin_type: int):
-    return resolver, encode_addr_multicoin_call(node, coin_type)
-
-
-def lookup_reads(name: str):
-    """The reads a lookup makes before it knows the name's resolver."""
-    labels = name.split(".")
-    tld = labels[-1]
-    reads = []
-    registrar = REGISTRARS.get(tld)
-    if registrar and len(labels) >= 2:
-        token = label_token(labels[-2])
-        reads += [BLOCK_READ, eth_call_read(*expires_call(registrar, token)), eth_call_read(*grace_call(registrar))]
-        if len(labels) == 2 and is_encoded_labelhash(labels[0]):
-            reads.append(eth_call_read(*label_call(registrar, token)))
-        if CONTROLLERS.get(tld):
-            reads.append(eth_call_read(*reserved_call(CONTROLLERS[tld], token)))
-    registry = REGISTRIES.get(tld)
-    if registry:
-        node = node_of(name)
-        reads += [eth_call_read(*resolver_call(registry, node)), eth_call_read(*owner_call(registry, node))]
-    return reads
-
-
-def record_reads(resolver: str, node: bytes):
-    """The reads of a name's record from its resolver."""
-    return [eth_call_read(*text_call(resolver, node, k)) for k in TEXT_KEYS] + [
-        eth_call_read(*addr_call(resolver, node, coin)) for coin in RECORD_COINS
-    ]
-
-
 # ---------- Coin-specific address encoders ----------
 # Each takes raw bytes as stored under ENSIP-9 and returns the canonical
 # user-facing string for that chain (EIP-55 for ETH, bech32/base58check
@@ -1045,9 +665,9 @@ def split_links(value: str) -> list:
 
 
 def upstream_error(subject: dict, e: Exception) -> dict:
-    """The exception can carry the failing URL and SNRC_RPC can carry a provider
-    key, so the text goes to the log and only the type to the caller."""
-    log_event(logging.WARNING, "upstream_error", **subject, error=type(e).__name__, message=str(e))
+    """urlopen puts the failing URL into its message and SNRC_RPC can carry a
+    provider key, so the text goes to the log and only the type to the caller."""
+    print(f"upstream error: {type(e).__name__}: {e}", file=sys.stderr)
     return {
         **subject,
         "error": "upstreamError",
@@ -1060,8 +680,9 @@ def name_record(name: str):
     has one, with every field unset."""
     registry = REGISTRIES[name.rsplit(".", 1)[-1]]
     node = node_of(name)
-    resolver_addr = decode_address(eth_call(*resolver_call(registry, node)))
-    owner = decode_address(eth_call(*owner_call(registry, node)))
+    node_hex = node.hex()
+    resolver_addr = decode_address(eth_call(registry, selector("resolver(bytes32)") + node_hex))
+    owner = decode_address(eth_call(registry, selector("owner(bytes32)") + node_hex))
     rec = {
         "name": canonical_name(name),
         "nickname": "",
@@ -1078,7 +699,6 @@ def name_record(name: str):
     }
     if resolver_addr == ZERO_ADDR:
         return rec
-    prefetch(record_reads(resolver_addr, node))
     texts = {}
     for k in TEXT_KEYS:
         try:
@@ -1114,7 +734,6 @@ def registration(name: str):
     tld = name.rsplit(".", 1)[-1]
     if not REGISTRIES.get(tld):
         return 400, {"name": name, "error": "tldNotConfigured"}
-    prefetch(lookup_reads(name))
     reg = name_status(name)
     status = reg["status"]
     if status in ("registered", "grace"):
@@ -1169,7 +788,7 @@ def resolve(name: str):
         }
 
     node = node_of(name)
-    prefetch(lookup_reads(name))
+    node_hex = node.hex()
 
     # Before the resolver lookup, so a lapsed name is not reported as noResolver.
     reg = name_status(name)
@@ -1187,12 +806,13 @@ def resolve(name: str):
         }
         return (404 if reg["status"] == "unregistered" else 410), body
 
-    resolver_addr = decode_address(eth_call(*resolver_call(registry, node)))
+    resolver_raw = eth_call(registry, selector("resolver(bytes32)") + node_hex)
+    resolver_addr = decode_address(resolver_raw)
     if resolver_addr == ZERO_ADDR:
         # A registered name always resolves: with no resolver set the record is
         # still returned with every field unset, so "taken until <date>" stays
         # answerable. For a subname, no owner means nobody created it.
-        owner = decode_address(eth_call(*owner_call(registry, node)))
+        owner = decode_address(eth_call(registry, selector("owner(bytes32)") + node_hex))
         if len(name.split(".")) > 2 and owner == ZERO_ADDR:
             return 404, {
                 "name": name,
@@ -1217,9 +837,9 @@ def resolve(name: str):
             **reg,
         }
 
-    owner = decode_address(eth_call(*owner_call(registry, node)))
+    owner_raw = eth_call(registry, selector("owner(bytes32)") + node_hex)
+    owner = decode_address(owner_raw)
 
-    prefetch(record_reads(resolver_addr, node))
     texts = {}
     for k in TEXT_KEYS:
         try:
@@ -1258,34 +878,12 @@ def resolve(name: str):
 # ---------- HTTP layer ----------
 
 class Handler(BaseHTTPRequestHandler):
-    # the smp-server reuses a connection only after an HTTP/1.1 response
-    protocol_version = "HTTP/1.1"
-    # idle seconds before a kept-alive connection is closed; the smp-server closes
-    # its idle ones after 30-35 s, so it is the one to close them
-    timeout = 60
-
-    def setup(self):
-        super().setup()
-        # headers and body go out in separate writes, which Nagle holds for the client's delayed ACK
-        self.request.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
-
-    def handle_one_request(self):
-        # on a kept-alive connection these still hold the previous request's values
-        self._started = self._sent = self.path = self.headers = None
-        super().handle_one_request()
-
     def do_GET(self):  # noqa: N802 - http.server contract
-        self._started = time.monotonic()
-        if self._has_body():
-            # an unread body would be taken for the next request on this connection, which a
-            # reverse proxy reusing it would pass to another client (request smuggling)
-            self._respond(400, {"error": "unexpectedBody"}, close=True)
-            return
         path = urlparse(self.path).path
         parts = [unquote(p) for p in path.split("/") if p]
 
         if parts == ["health"]:
-            self._respond(200, {"ok": True, "rpc": public_endpoint(RPC), "registries": REGISTRIES, **head_block()})
+            self._respond(200, {"ok": True, "rpc": RPC, "registries": REGISTRIES, **head_block()})
             return
 
         if len(parts) == 3 and parts[0] == "v2" and parts[1] == "resolve":
@@ -1294,8 +892,7 @@ class Handler(BaseHTTPRequestHandler):
                 self._respond(400, {"name": name, "error": "notFullyQualified"})
                 return
             try:
-                with request_reads():
-                    status, body = registration(name)
+                status, body = registration(name)
             except Exception as e:  # surface upstream errors as 502
                 status, body = 502, upstream_error({"name": name}, e)
             self._respond(status, body)
@@ -1318,8 +915,7 @@ class Handler(BaseHTTPRequestHandler):
                 )
                 return
             try:
-                with request_reads():
-                    status, body = resolve(name)
+                status, body = resolve(name)
             except Exception as e:  # surface upstream errors as 502
                 status, body = 502, upstream_error({"name": name}, e)
             self._respond(status, body)
@@ -1334,176 +930,34 @@ class Handler(BaseHTTPRequestHandler):
             },
         )
 
-    def _has_body(self) -> bool:
-        # a malformed header line ends parsing, leaving the rest, Content-Length included, as payload
-        if self.headers.defects or self.headers.get_payload():
-            return True
-        if self.headers.get_all("Transfer-Encoding"):
-            return True
-        return any(length.strip() != "0" for length in self.headers.get_all("Content-Length") or [])
-
-    def _respond(self, status: int, body: dict, close: bool = False):
+    def _respond(self, status: int, body: dict):
         data = json.dumps(body, indent=2).encode()
-        # send_response logs the request, so the size is known before it
-        self._sent = len(data)
         self.send_response(status)
         self.send_header("Content-Type", "application/json")
         self.send_header("Content-Length", str(len(data)))
-        if close:
-            # also sets close_connection, so the server closes it after this response
-            self.send_header("Connection", "close")
         self.end_headers()
         self.wfile.write(data)
 
-    def address_string(self) -> str:
-        forwarded = self.headers.get_all("X-Forwarded-For") if self.headers else None
-        return client_address(self.client_address[0], ",".join(forwarded) if forwarded else None)
-
-    def log_request(self, code="-", size="-"):
-        started = self._started
-        path = urlparse(self.path).path if self.path else None
-        log_event(
-            # the container's health check runs every 30 s
-            logging.DEBUG if path == "/health" else logging.INFO,
-            "request",
-            client=self.address_string(),
-            worker=os.getpid(),
-            method=getattr(self, "command", None),
-            path=unquote(self.path) if self.path else None,
-            status=getattr(code, "value", code),
-            bytes=self._sent,
-            ms=round((time.monotonic() - started) * 1000) if started else None,
-        )
-
-    def log_error(self, fmt, *args):
-        message = fmt % args
-        # a kept-alive connection left idle is closed on purpose
-        level = logging.DEBUG if message.startswith("Request timed out") else logging.WARNING
-        log_event(level, "http_error", client=self.address_string(), worker=os.getpid(), message=message)
-
     def log_message(self, fmt, *args):
-        log_event(logging.INFO, "http", client=self.address_string(), message=fmt % args)
-
-
-class ResolverServer(ThreadingHTTPServer):
-    # socketserver's default of 5 drops simultaneous connections, each retried by
-    # TCP after 1 s, and the smp-server gives up after 3 s. The kernel caps it at somaxconn.
-    request_queue_size = 128
-
-    def handle_error(self, request, client_address):
-        error = sys.exc_info()[1]
-        if isinstance(error, ConnectionError):
-            # the smp-server hung up, usually after its own timeout
-            log_event(logging.WARNING, "client_gone", client=client_address[0], worker=os.getpid(), error=type(error).__name__)
-        else:
-            log_event(logging.ERROR, "request_failed", client=client_address[0], worker=os.getpid(), exc_info=True)
-
-
-def public_endpoint(url: str) -> str:
-    """The RPC endpoint without credentials, path or query, where a provider key would be."""
-    parsed = urlparse(url)
-    return f"{parsed.scheme}://{parsed.netloc.rpartition('@')[2]}"
-
-
-def client_address(peer: str, forwarded_for: str | None) -> str:
-    """The peer, or behind trusted proxies the last X-Forwarded-For address none of them added."""
-    if not forwarded_for or not _trusted(peer):
-        return peer
-    hops = [hop.strip() for hop in forwarded_for.split(",")]
-    for hop in reversed(hops):
-        # an address it cannot read, and anything claimed before it, is not believed
-        if _address(hop) is None:
-            return peer
-        if not _trusted(hop):
-            return hop
-    return hops[0]
-
-
-def _address(text: str):
-    try:
-        ip = ipaddress.ip_address(text)
-    except ValueError:
-        return None
-    return ip.ipv4_mapped or ip if ip.version == 6 else ip
-
-
-def _trusted(text: str) -> bool:
-    ip = _address(text)
-    return ip is not None and any(ip in net for net in TRUSTED_PROXIES)
-
-
-def serve(reuse_port: bool):
-    server = ResolverServer((BIND, PORT), Handler, bind_and_activate=False)
-    server.allow_reuse_port = reuse_port
-    try:
-        server.server_bind()
-        server.server_activate()
-        server.serve_forever()
-    finally:
-        server.server_close()
-
-
-def stop_on(signum, _frame):
-    log_event(logging.INFO, "stopping", signal=signal.Signals(signum).name)
-    sys.exit(0)
-
-
-def supervise(workers: int):
-    """Runs the workers, each with its own socket on the shared port. One worker
-    exiting stops the others, so the container restarts instead of running short."""
-    children = []
-
-    def stop(*_):
-        for pid in children:
-            try:
-                os.kill(pid, signal.SIGTERM)
-            except ProcessLookupError:
-                pass
-
-    def stop_and_exit(signum, frame):
-        stop()
-        stop_on(signum, frame)
-
-    # before forking, so a signal during startup cannot orphan the workers
-    signal.signal(signal.SIGTERM, stop_and_exit)
-    signal.signal(signal.SIGINT, stop_and_exit)
-    for _ in range(workers):
-        pid = os.fork()
-        if pid == 0:
-            signal.signal(signal.SIGTERM, signal.SIG_DFL)
-            signal.signal(signal.SIGINT, signal.SIG_DFL)
-            code = 0
-            try:
-                serve(reuse_port=True)
-            except BaseException:
-                log_event(logging.ERROR, "worker_failed", worker=os.getpid(), exc_info=True)
-                code = 1
-            os._exit(code)
-        children.append(pid)
-    pid, status = os.wait()
-    log_event(logging.ERROR, "worker_exited", worker=pid, status=status, action="stopping")
-    stop()
-    sys.exit(1)
+        # Quiet the default per-request access log; route to stderr in one line.
+        sys.stderr.write(f"{self.address_string()} - {fmt % args}\n")
 
 
 def main():
-    setup_logging()
-    log_event(
-        logging.INFO,
-        "listening",
-        bind=BIND,
-        port=PORT,
-        workers=WORKERS,
-        rpc=public_endpoint(RPC),
-        registries=",".join(f"{tld}={addr or '-'}" for tld, addr in REGISTRIES.items()),
-        trusted_proxies=",".join(map(str, TRUSTED_PROXIES)) or None,
+    server = ThreadingHTTPServer((BIND, PORT), Handler)
+    sys.stderr.write(
+        f"snrc-resolve listening on {BIND}:{PORT}\n"
+        f"  RPC = {RPC}\n"
+        f"  Registries:\n"
     )
-    if WORKERS > 1:
-        supervise(WORKERS)
-    else:
-        signal.signal(signal.SIGTERM, stop_on)
-        signal.signal(signal.SIGINT, stop_on)
-        serve(reuse_port=False)
+    for tld, addr in REGISTRIES.items():
+        sys.stderr.write(f"    .{tld:<8s} = {addr or '(not configured)'}\n")
+    sys.stderr.write("  GET /v2/resolve/<name>   GET /v1/resolve/<name>   GET /health\n")
+    try:
+        server.serve_forever()
+    except KeyboardInterrupt:
+        sys.stderr.write("\nshutting down\n")
+        server.server_close()
 
 
 if __name__ == "__main__":

scripts/resolver/service/test_snrc_resolve.py

@@ -1,30 +1,15 @@
 #!/usr/bin/env python3
 """Unit tests for snrc-resolve helpers.
 
-Run with `uv run pytest` from scripts/resolver/service.
+Run with `python3 -m unittest scripts/resolver/service/test_snrc_resolve.py`.
 """
 
 import contextlib
-import http.client
 import importlib.util
 import io
-import ipaddress
-import json
-import logging
 import os
-import queue
-import re
-import signal
-import socket
-import subprocess
-import sys
-import threading
 import time
 import unittest
-from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
-from urllib.error import HTTPError
-from urllib.parse import urlparse
-from urllib.request import Request, urlopen
 
 # snrc-resolve.py has a hyphen, so import it via importlib instead of `import`.
 _HERE = os.path.dirname(os.path.abspath(__file__))
@@ -651,25 +636,6 @@ class PricingTests(unittest.TestCase):
         self.assertEqual(body["basePrice"], self.BASE)
 
 
-class DecodePricesTests(unittest.TestCase):
-    def test_a_count_longer_than_the_answer_is_refused(self):
-        """The count comes from the oracle; decoding it unchecked could loop for ever."""
-        huge = "0x" + snrc.encode_uint(200) + snrc.encode_uint(0x40) + snrc.encode_uint(2**64)
-        outcome = []
-
-        def decode():
-            try:
-                snrc.decode_prices(huge)
-            except RuntimeError as e:
-                outcome.append(e)
-
-        worker = threading.Thread(target=decode, daemon=True)
-        worker.start()
-        worker.join(5)
-        self.assertFalse(worker.is_alive(), "decoding did not stop")
-        self.assertRegex(str(outcome[0]), "short response")
-
-
 class EnsOracleTests(unittest.TestCase):
     """.testing runs an ENS-shaped oracle: it prices in attoUSD per second and
     charges a premium on lapsed names that it does not expose."""
@@ -811,17 +777,13 @@ class ErrorCodeTests(unittest.TestCase):
                 self.assertNotEqual(body["error"], body["message"])
 
     def test_an_upstream_failure_does_not_echo_the_exception(self):
-        with self.assertLogs("snrc_resolve", "WARNING") as logs:
+        with contextlib.redirect_stderr(io.StringIO()) as log:
             body = snrc.upstream_error(
                 {"name": "alice.testing"},
                 RuntimeError("http://user:[email protected]/kEy8 refused"),
             )
         # the operator still sees the detail in the log
-        [record] = logs.records
-        self.assertEqual(record.getMessage(), "upstream_error")
-        self.assertEqual(record.fields["name"], "alice.testing")
-        self.assertEqual(record.fields["error"], "RuntimeError")
-        self.assertIn("secret", record.fields["message"])
+        self.assertIn("secret", log.getvalue())
         self.assertEqual(body["error"], "upstreamError")
         self.assertIn("RuntimeError", body["message"])
         self.assertNotIn("secret", body["message"])
@@ -1073,797 +1035,5 @@ class RegistrationV2Tests(unittest.TestCase):
         self.assertEqual(res["lastBlockTs"], self.now)
         self.assertEqual(res["registration"]["type"], "available")
 
-
-@unittest.skipUnless(sys.platform.startswith("linux"), "Linux drops SYNs on a full accept queue")
-class ListenBacklogTests(unittest.TestCase):
-    """The smp-server opens a connection per lookup and gives up after 3 s, so a
-    burst the accept queue cannot hold fails: TCP retries a dropped SYN after 1 s."""
-
-    BURST = 50
-
-    def test_a_burst_of_connections_is_queued_while_the_server_is_busy(self):
-        # never accepts, so every connection must wait in the queue
-        server = snrc.ResolverServer(("127.0.0.1", 0), snrc.Handler)
-        clients = []
-        try:
-            for i in range(self.BURST):
-                c = socket.socket()
-                clients.append(c)
-                c.settimeout(0.5)
-                try:
-                    c.connect(server.server_address)
-                except TimeoutError:
-                    self.fail(f"connection {i + 1} of {self.BURST} was not queued")
-        finally:
-            for c in clients:
-                c.close()
-            server.server_close()
-
-
-def _word(value: int) -> bytes:
-    return value.to_bytes(32, "big")
-
-
-def _decode_aggregate3_calls(data: str):
-    """Multicall3.aggregate3 calldata back to (to, data) pairs, written apart
-    from the resolver's encoder so the two check each other."""
-    raw = bytes.fromhex(data[len(snrc.AGGREGATE3):])
-
-    def word(at):
-        return int.from_bytes(raw[at:at + 32], "big")
-
-    array = word(0)
-    base = array + 32
-    calls = []
-    for i in range(word(array)):
-        item = base + word(base + 32 * i)
-        call = item + word(item + 64)
-        calls.append(("0x" + raw[item + 12:item + 32].hex(), "0x" + raw[call + 32:call + 32 + word(call)].hex()))
-    return calls
-
-
-def _encode_aggregate3_results(results) -> str:
-    tuples = [
-        _word(int(ok)) + _word(0x40) + _word(len(data)) + data + b"\x00" * ((-len(data)) % 32)
-        for ok, data in results
-    ]
-    offsets, at = b"", 32 * len(tuples)
-    for t in tuples:
-        offsets += _word(at)
-        at += len(t)
-    return "0x" + (_word(0x20) + _word(len(tuples)) + offsets + b"".join(tuples)).hex()
-
-
-class FakeChain:
-    """Contract state for one registered name and one free name. Any other
-    call reverts, as a view function asked for something unset does."""
-
-    REGISTRY = "0x58fc46996d975c57883564648bda5206d1a0102b"
-    REGISTRAR = "0xef47eb4384b46c89e4482a677c2cbcbd2a6fd85a"
-    CONTROLLER = "0x281ca41311c2aa808c917c4674639d7567b75714"
-    ORACLE = "0x1e0c9a2b9d1a4c8f7b3e5d6a9c2f4b8e1d7a3c50"
-    OWNER = "0xd83bd7e0e6b8a4c1f2593a7b0c4e8d1a6f9b2c37"
-    RESOLVER = "0x80fa2b1c3d4e5f60718293a4b5c6d7e8f9012345"
-    GRACE = 90 * 86400
-    TEXTS = {"nickname": "Acme", "url": "https://acme.example", "simplex.channel": "https://a.example/c#1;https://b.example/c#2"}
-
-    def __init__(self):
-        self.now = int(time.time())
-        acme, free = snrc.label_token("acme"), snrc.label_token("free")
-        node = snrc.node_of("acme.testing")
-        abi_bytes = RegistrationV2Tests._abi_bytes
-        prices = RegistrationV2Tests._prices_return(RegistrationV2Tests())
-        self.answers = {
-            snrc.expires_call(self.REGISTRAR, acme): "0x" + snrc.encode_uint(self.now + 3600),
-            snrc.expires_call(self.REGISTRAR, free): "0x" + snrc.encode_uint(0),
-            snrc.grace_call(self.REGISTRAR): "0x" + snrc.encode_uint(self.GRACE),
-            snrc.label_call(self.REGISTRAR, acme): abi_bytes(b"acme"),
-            snrc.reserved_call(self.CONTROLLER, acme): "0x" + snrc.encode_uint(0),
-            snrc.reserved_call(self.CONTROLLER, free): "0x" + snrc.encode_uint(0),
-            snrc.resolver_call(self.REGISTRY, node): "0x" + snrc.encode_uint(int(self.RESOLVER, 16)),
-            snrc.owner_call(self.REGISTRY, node): "0x" + snrc.encode_uint(int(self.OWNER, 16)),
-            snrc.addr_call(self.RESOLVER, node, snrc.COIN_ETH): abi_bytes(bytes.fromhex(self.OWNER[2:])),
-            snrc.prices_call(self.CONTROLLER): "0x" + snrc.encode_uint(int(self.ORACLE, 16)),
-            snrc.prices_call(self.ORACLE): prices,
-            snrc.min_length_call(self.CONTROLLER): "0x" + snrc.encode_uint(3),
-        }
-        for key, value in self.TEXTS.items():
-            self.answers[snrc.text_call(self.RESOLVER, node, key)] = abi_bytes(value.encode())
-
-    def call(self, to, data):
-        answer = self.answers.get((to.lower(), data))
-        if answer is None:
-            raise RuntimeError("execution reverted")
-        return answer
-
-
-class FakeNode(ThreadingHTTPServer):
-    """A JSON-RPC node over HTTP/1.1 keep-alive, serving FakeChain, with
-    batches and Multicall3, each of which a test can take away."""
-
-    daemon_threads = True
-
-    def __init__(self):
-        super().__init__(("127.0.0.1", 0), _FakeNodeHandler)
-        self.chain = FakeChain()
-        self.block = 100
-        self.requests = 0
-        self.connections = 0
-        self.batch = True
-        self.multicall = True
-        self.multicall_null = False
-        self.status = 200
-        self.hang_up = False
-        self.drop_after_reply = False
-        threading.Thread(target=self.serve_forever, args=(0.05,), daemon=True).start()
-
-    @property
-    def url(self):
-        return f"http://127.0.0.1:{self.server_address[1]}/"
-
-    def stop(self):
-        self.shutdown()
-        self.server_close()
-
-    def answer(self, req):
-        out = {"jsonrpc": "2.0", "id": req.get("id")}
-        method, params = req["method"], req["params"]
-        if method == "eth_blockNumber":
-            out["result"] = hex(self.block)
-        elif method == "eth_getBlockByNumber":
-            out["result"] = {"number": hex(self.block), "timestamp": hex(self.chain.now)}
-        elif method == "eth_call" and params[0]["to"].lower() == snrc.MULTICALL.lower():
-            if not self.multicall:
-                out["error"] = {"code": -32000, "message": "no contract code"}
-            elif self.multicall_null:
-                out["result"] = None
-            else:
-                results = []
-                for to, data in _decode_aggregate3_calls(params[0]["data"]):
-                    try:
-                        results.append((True, bytes.fromhex(self.chain.call(to, data)[2:])))
-                    except RuntimeError:
-                        results.append((False, b""))
-                out["result"] = _encode_aggregate3_results(results)
-        elif method == "eth_call":
-            try:
-                out["result"] = self.chain.call(params[0]["to"], params[0]["data"])
-            except RuntimeError:
-                out["error"] = {"code": 3, "message": "execution reverted"}
-        else:
-            out["error"] = {"code": -32601, "message": "method not found"}
-        return out
-
-
-class _FakeNodeHandler(BaseHTTPRequestHandler):
-    protocol_version = "HTTP/1.1"
-
-    def setup(self):
-        super().setup()
-        # headers and body go out in separate writes, which Nagle holds for the client's delayed ACK
-        self.request.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
-        self.server.connections += 1
-
-    def do_POST(self):  # noqa: N802 - http.server contract
-        request = json.loads(self.rfile.read(int(self.headers["Content-Length"])))
-        node = self.server
-        node.requests += 1
-        if node.hang_up:
-            self.close_connection = True
-            return
-        if node.status != 200:
-            reply = {"error": "unavailable"}
-        elif isinstance(request, list):
-            reply = [node.answer(r) for r in request] if node.batch else {"jsonrpc": "2.0", "id": None, "error": {"code": -32600, "message": "batch not supported"}}
-        else:
-            reply = node.answer(request)
-        data = json.dumps(reply).encode()
-        self.send_response(node.status)
-        self.send_header("Content-Type", "application/json")
-        self.send_header("Content-Length", str(len(data)))
-        self.end_headers()
-        self.wfile.write(data)
-        # closes without `Connection: close`, as a node dropping an idle connection does
-        self.close_connection = node.drop_after_reply
-
-    def log_message(self, fmt, *args):
-        pass
-
-
-class FakeNodeTestCase(unittest.TestCase):
-    """Points the resolver at a FakeNode and at FakeChain's contracts."""
-
-    def setUp(self):
-        self.node = FakeNode()
-        self._saved = (snrc.RPC, snrc.RPC_URL, snrc.REGISTRIES, snrc.REGISTRARS, snrc.CONTROLLERS)
-        snrc.RPC = self.node.url
-        snrc.RPC_URL = urlparse(snrc.RPC)
-        snrc.REGISTRIES = {"testing": FakeChain.REGISTRY, "simplex": ""}
-        snrc.REGISTRARS = {"testing": FakeChain.REGISTRAR}
-        snrc.CONTROLLERS = {"testing": FakeChain.CONTROLLER}
-        snrc._multicall_failed_logged = False
-        self._drain_pool()
-
-    def tearDown(self):
-        self._drain_pool()
-        snrc.RPC, snrc.RPC_URL, snrc.REGISTRIES, snrc.REGISTRARS, snrc.CONTROLLERS = self._saved
-        self.node.stop()
-
-    def _drain_pool(self):
-        while not snrc._rpc_pool.empty():
-            snrc._rpc_pool.get_nowait().close()
-
-    def requests_made(self, action):
-        before = self.node.requests
-        result = action()
-        return result, self.node.requests - before
-
-
-class RpcTransportTests(FakeNodeTestCase):
-    """A lookup makes several reads, and a new connection per read costs CPU
-    and leaves a TIME_WAIT socket each, which exhausts local ports under load."""
-
-    def test_reads_share_one_connection(self):
-        for _ in range(18):
-            self.assertEqual(snrc.rpc("eth_blockNumber", []), hex(self.node.block))
-        self.assertEqual(self.node.connections, 1)
-
-    def test_a_connection_the_node_closed_is_replaced(self):
-        self.node.drop_after_reply = True
-        for _ in range(3):
-            self.assertEqual(snrc.rpc("eth_blockNumber", []), hex(self.node.block))
-        self.assertEqual(self.node.connections, 3)
-
-    def test_a_fresh_connection_that_fails_is_not_retried(self):
-        """Only a pooled connection can be stale; a new one failing means the
-        node is down, and resending would only double the wait."""
-        self.node.hang_up = True
-        with self.assertRaises(ConnectionError):
-            snrc.rpc("eth_blockNumber", [])
-        self.assertEqual(self.node.requests, 1)
-
-    def test_a_node_failure_is_not_a_reverted_call(self):
-        """Callers read RuntimeError as the call reverting and fall back to an
-        empty value, so a node failure must not look like one."""
-        self.node.status = 502
-        with self.assertRaises(HTTPError) as cm:
-            snrc.rpc("eth_blockNumber", [])
-        self.assertNotIsInstance(cm.exception, RuntimeError)
-        self.assertEqual(cm.exception.code, 502)
-
-    def test_a_reverted_call_is_a_runtime_error_and_keeps_the_connection(self):
-        with self.assertRaises(RuntimeError):
-            snrc.eth_call("0x" + "11" * 20, "0xdeadbeef")
-        snrc.rpc("eth_blockNumber", [])
-        self.assertEqual(self.node.connections, 1)
-
-
-class RpcPoolTests(FakeNodeTestCase):
-    def test_connections_beyond_the_pool_are_closed_after_use(self):
-        """Every worker would otherwise keep its peak concurrency open to the node."""
-        saved, snrc._rpc_pool = snrc._rpc_pool, queue.LifoQueue(maxsize=1)
-        try:
-            body = json.dumps({"jsonrpc": "2.0", "id": 1, "method": "eth_blockNumber", "params": []}).encode()
-            kept, extra = snrc._new_rpc_connection(), snrc._new_rpc_connection()
-            snrc._post_pooled(kept, body)
-            # returning a connection to a full pool must not wait for a free slot
-            done = threading.Thread(target=snrc._post_pooled, args=(extra, body), daemon=True)
-            done.start()
-            done.join(5)
-            self.assertFalse(done.is_alive(), "returning a connection to a full pool blocked")
-            self.assertEqual(snrc._rpc_pool.qsize(), 1)
-            self.assertIsNotNone(kept.sock)
-            self.assertIsNone(extra.sock)
-        finally:
-            while not snrc._rpc_pool.empty():
-                snrc._rpc_pool.get_nowait().close()
-            snrc._rpc_pool = saved
-
-
-class BatchedReadsTests(FakeNodeTestCase):
-    """Inside a request a round of reads is one round trip, and its contract
-    reads one multicall, because a node runs the calls of a JSON-RPC batch one
-    after another. Answers must be exactly those of reading one call at a time."""
-
-    def batched(self, answer, name):
-        def action():
-            with snrc.request_reads():
-                return answer(name)
-        return self.requests_made(action)
-
-    def assert_same_answer(self, answer, name, round_trips):
-        one_by_one, one_by_one_trips = self.requests_made(lambda: answer(name))
-        batched, batched_trips = self.batched(answer, name)
-        self.assertEqual(batched, one_by_one)
-        self.assertEqual(batched_trips, round_trips)
-        self.assertGreater(one_by_one_trips, round_trips)
-        return batched
-
-    def test_a_registered_name_takes_two_round_trips(self):
-        status, body = self.assert_same_answer(snrc.registration, "acme.testing", 2)
-        record = body["registration"]["nameRecord"]
-        self.assertEqual(record["nickname"], "Acme")
-        self.assertEqual(record["simplexChannel"], ["https://a.example/c#1", "https://b.example/c#2"])
-        self.assertIsNone(record["btc"])
-
-    def test_a_hashed_query_is_named_from_the_same_round_trip(self):
-        hashed = "[" + snrc.keccak(b"acme").hex() + "].testing"
-        status, body = self.assert_same_answer(snrc.registration, hashed, 2)
-        self.assertEqual(body["registration"]["nameRecord"]["name"], "acme.testing")
-
-    def test_an_available_name_is_priced_in_three_round_trips(self):
-        status, body = self.assert_same_answer(snrc.registration, "free.testing", 3)
-        self.assertEqual(body["registration"]["type"], "available")
-
-    def test_v1_answers_the_same(self):
-        self.assert_same_answer(snrc.resolve, "acme.testing", 2)
-
-    def test_without_multicall_a_round_is_still_one_batch(self):
-        self.node.multicall = False
-        with self.assertLogs("snrc_resolve", "WARNING") as logs:
-            self.assert_same_answer(snrc.registration, "acme.testing", 4)
-        [record] = logs.records
-        self.assertEqual((record.getMessage(), record.fields["fallback"]), ("multicall_unavailable", "batch"))
-
-    def test_a_multicall_without_a_result_falls_back_to_a_batch(self):
-        self.node.multicall_null = True
-        with self.assertLogs("snrc_resolve", "WARNING") as logs:
-            self.assert_same_answer(snrc.registration, "acme.testing", 4)
-        self.assertEqual([r.getMessage() for r in logs.records], ["multicall_unavailable"])
-
-    def test_an_answer_with_neither_result_nor_error_is_not_taken_as_one(self):
-        reads = {}
-        snrc._remember(reads, [("eth_blockNumber", [])], [{"jsonrpc": "2.0", "id": 0}])
-        self.assertEqual(reads, {})
-
-    def test_a_node_that_does_not_batch_is_read_one_call_at_a_time(self):
-        self.node.batch = False
-        one_by_one, one_by_one_trips = self.requests_made(lambda: snrc.registration("acme.testing"))
-        with self.assertNoLogs("snrc_resolve"):
-            batched, batched_trips = self.batched(snrc.registration, "acme.testing")
-        self.assertEqual(batched, one_by_one)
-        # one refused batch per round, then the reads the batch would have made
-        self.assertEqual(batched_trips, one_by_one_trips + 2)
-
-    def test_a_read_reverted_in_the_multicall_is_a_reverted_call(self):
-        with snrc.request_reads():
-            snrc.prefetch([snrc.eth_call_read(*snrc.grace_call(FakeChain.REGISTRAR)), snrc.eth_call_read(FakeChain.REGISTRY, "0xdeadbeef")])
-            _, trips = self.requests_made(lambda: self.assertRaises(RuntimeError, snrc.eth_call, FakeChain.REGISTRY, "0xdeadbeef"))
-        self.assertEqual(trips, 0)
-
-    def test_outside_a_request_nothing_is_prefetched(self):
-        _, trips = self.requests_made(lambda: snrc.prefetch(snrc.lookup_reads("acme.testing")))
-        self.assertEqual(trips, 0)
-
-
-class Aggregate3Tests(unittest.TestCase):
-    def test_calls_are_encoded_as_multicall3_reads_them(self):
-        calls = [(FakeChain.REGISTRY, "0x0178b8bf" + "11" * 32), (FakeChain.RESOLVER, "0x59d1d43c" + "22" * 100)]
-        data = snrc.encode_aggregate3(calls)
-        self.assertTrue(data.startswith(snrc.AGGREGATE3))
-        self.assertEqual(_decode_aggregate3_calls(data), calls)
-
-    def test_results_are_decoded_with_their_success_flags(self):
-        results = [(True, b"\x01" * 40), (False, b""), (True, b"")]
-        self.assertEqual(snrc.decode_aggregate3(_encode_aggregate3_results(results)), results)
-
-    def test_a_truncated_answer_is_refused(self):
-        whole = _encode_aggregate3_results([(True, b"\x01" * 40)])
-        with self.assertRaises(ValueError):
-            snrc.decode_aggregate3(whole[:-64])
-        with self.assertRaises(ValueError):
-            snrc.decode_aggregate3("0x")
-
-
-class RequestLogTests(unittest.TestCase):
-    """Each request is one event with the client it came from, behind a reverse
-    proxy the client the proxy names rather than the proxy itself."""
-
-    def setUp(self):
-        self.server = snrc.ResolverServer(("127.0.0.1", 0), snrc.Handler)
-        threading.Thread(target=self.server.serve_forever, args=(0.05,), daemon=True).start()
-        self._saved = snrc.TRUSTED_PROXIES
-
-    def tearDown(self):
-        snrc.TRUSTED_PROXIES = self._saved
-        self.server.shutdown()
-        self.server.server_close()
-
-    def request(self, path, headers=None, level="INFO"):
-        url = f"http://127.0.0.1:{self.server.server_address[1]}{path}"
-        with self.assertLogs("snrc_resolve", level) as logs:
-            try:
-                urlopen(Request(url, headers=headers or {}), timeout=5).read()
-            except HTTPError:
-                pass
-            deadline = time.monotonic() + 2
-            while not any(r.getMessage() == "request" for r in logs.records) and time.monotonic() < deadline:
-                time.sleep(0.01)
-        [record] = [r for r in logs.records if r.getMessage() == "request"]
-        return record
-
-    def test_a_request_is_logged_with_its_outcome(self):
-        record = self.request("/v2/resolve/x.simplex")
-        fields = record.fields
-        self.assertEqual(record.levelname, "INFO")
-        self.assertEqual(
-            (fields["client"], fields["method"], fields["path"], fields["status"], fields["worker"]),
-            ("127.0.0.1", "GET", "/v2/resolve/x.simplex", 400, os.getpid()),
-        )
-        self.assertGreater(fields["bytes"], 0)
-        self.assertGreaterEqual(fields["ms"], 0)
-
-    def test_a_trusted_proxy_names_the_client(self):
-        snrc.TRUSTED_PROXIES = (ipaddress.ip_network("127.0.0.1/32"),)
-        record = self.request("/v2/resolve/x.simplex", {"X-Forwarded-For": "203.0.113.7"})
-        self.assertEqual(record.fields["client"], "203.0.113.7")
-
-    def test_any_other_peer_cannot_name_itself(self):
-        record = self.request("/v2/resolve/x.simplex", {"X-Forwarded-For": "203.0.113.7"})
-        self.assertEqual(record.fields["client"], "127.0.0.1")
-
-    def test_a_bad_request_is_not_logged_with_the_previous_ones_fields(self):
-        """On a kept-alive connection the handler still held the last request's path and size."""
-        with self.assertLogs("snrc_resolve", "INFO") as logs:
-            with socket.create_connection(self.server.server_address, timeout=5) as sock:
-                sock.sendall(b"GET /v2/resolve/x.simplex HTTP/1.1\r\nHost: x\r\n\r\n")
-                sock.recv(65536)
-                sock.sendall(b"BOGUS\r\n\r\n")
-                while sock.recv(65536):
-                    pass
-        first, second = [r for r in logs.records if r.getMessage() == "request"]
-        self.assertEqual(first.fields["path"], "/v2/resolve/x.simplex")
-        self.assertEqual((second.fields["status"], second.fields["path"], second.fields["bytes"], second.fields["ms"]), (400, None, None, None))
-
-    def test_health_checks_are_logged_only_at_debug(self):
-        """The container checks /health every 30 s."""
-        record = self.request("/health", level="DEBUG")
-        self.assertEqual(record.levelname, "DEBUG")
-
-
-class RequestBodyTests(unittest.TestCase):
-    """Behind a reverse proxy that reuses connections, a body left unread would be
-    answered as another request, and that answer given to the proxy's next client."""
-
-    def setUp(self):
-        self.server = snrc.ResolverServer(("127.0.0.1", 0), snrc.Handler)
-        threading.Thread(target=self.server.serve_forever, args=(0.05,), daemon=True).start()
-        self._log = contextlib.redirect_stderr(io.StringIO())
-        self._log.__enter__()
-
-    def tearDown(self):
-        self._log.__exit__(None, None, None)
-        self.server.shutdown()
-        self.server.server_close()
-
-    def exchange(self, head: bytes, body: bytes = b"") -> bytes:
-        with socket.create_connection(self.server.server_address, timeout=5) as sock:
-            sock.sendall(head + body)
-            data = b""
-            while chunk := sock.recv(65536):
-                data += chunk
-                if data.count(b"HTTP/1.1 ") > 1:
-                    break
-            return data
-
-    SMUGGLED = b"GET /v2/resolve/y.simplex HTTP/1.1\r\nHost: x\r\n\r\n"
-
-    def test_a_body_is_refused_and_the_connection_closed(self):
-        data = self.exchange(b"GET /v2/resolve/x.simplex HTTP/1.1\r\nHost: x\r\nContent-Length: %d\r\n\r\n" % len(self.SMUGGLED), self.SMUGGLED)
-        self.assertEqual(data.count(b"HTTP/1.1 "), 1)
-        self.assertIn(b"HTTP/1.1 400 ", data)
-        self.assertIn(b"Connection: close", data)
-        self.assertNotIn(b"y.simplex", data)
-
-    def test_a_length_after_a_malformed_header_line_is_still_seen(self):
-        """Python stops parsing headers at a malformed line and keeps the rest as payload."""
-        data = self.exchange(b"GET /v2/resolve/x.simplex HTTP/1.1\r\nX-Junk : 1\r\nContent-Length: %d\r\n\r\n" % len(self.SMUGGLED), self.SMUGGLED)
-        self.assertEqual(data.count(b"HTTP/1.1 "), 1)
-        self.assertIn(b"unexpectedBody", data)
-        self.assertNotIn(b"y.simplex", data)
-
-    def test_a_chunked_body_is_refused_and_the_connection_closed(self):
-        chunked = b"%x\r\n" % len(self.SMUGGLED) + self.SMUGGLED + b"\r\n0\r\n\r\n"
-        data = self.exchange(b"GET /v2/resolve/x.simplex HTTP/1.1\r\nHost: x\r\nTransfer-Encoding: chunked\r\n\r\n", chunked)
-        self.assertEqual(data.count(b"HTTP/1.1 "), 1)
-        self.assertNotIn(b"y.simplex", data)
-
-    def test_an_empty_body_keeps_the_connection(self):
-        conn = http.client.HTTPConnection(*self.server.server_address, timeout=5)
-        answers = []
-        for _ in range(2):
-            conn.request("GET", "/v2/resolve/x.simplex", headers={"Content-Length": "0"})
-            res = conn.getresponse()
-            answers.append((res.status, json.loads(res.read())["error"], conn.sock))
-        conn.close()
-        self.assertEqual([a[:2] for a in answers], [(400, "tldNotConfigured")] * 2)
-        self.assertIs(answers[0][2], answers[1][2])
-
-
-class PublicEndpointTests(unittest.TestCase):
-    def test_credentials_path_and_query_are_not_shown(self):
-        self.assertEqual(snrc.public_endpoint("https://user:[email protected]:8443/v2/KEY?apikey=K"), "https://rpc.example:8443")
-
-    def test_a_plain_endpoint_is_unchanged(self):
-        self.assertEqual(snrc.public_endpoint("http://reth:8545"), "http://reth:8545")
-
-    def test_an_ipv6_host_keeps_its_brackets(self):
-        self.assertEqual(snrc.public_endpoint("http://u:p@[::1]:8545/key"), "http://[::1]:8545")
-
-    def test_a_malformed_port_does_not_break_health(self):
-        self.assertEqual(snrc.public_endpoint("http://reth:port"), "http://reth:port")
-
-
-class ClientAddressTests(unittest.TestCase):
-    PROXY = "172.18.0.1"
-
-    def setUp(self):
-        self._saved = snrc.TRUSTED_PROXIES
-        snrc.TRUSTED_PROXIES = (ipaddress.ip_network("172.16.0.0/12"),)
-
-    def tearDown(self):
-        snrc.TRUSTED_PROXIES = self._saved
-
-    def test_a_peer_that_is_no_proxy_is_the_client(self):
-        self.assertEqual(snrc.client_address("198.51.100.9", "203.0.113.7"), "198.51.100.9")
-
-    def test_without_the_header_the_proxy_is_the_client(self):
-        self.assertEqual(snrc.client_address(self.PROXY, None), self.PROXY)
-
-    def test_the_address_the_proxy_added_is_the_client(self):
-        self.assertEqual(snrc.client_address(self.PROXY, "203.0.113.7"), "203.0.113.7")
-
-    def test_addresses_a_client_sent_itself_are_not_believed(self):
-        """A proxy appends the address it saw, so only the last untrusted one is known."""
-        self.assertEqual(snrc.client_address(self.PROXY, "6.6.6.6, 203.0.113.7"), "203.0.113.7")
-
-    def test_trusted_proxies_in_a_chain_are_skipped(self):
-        self.assertEqual(snrc.client_address(self.PROXY, "203.0.113.7, 172.18.0.5"), "203.0.113.7")
-
-    def test_an_address_that_does_not_parse_is_not_believed(self):
-        self.assertEqual(snrc.client_address(self.PROXY, "203.0.113.7, not-an-ip"), self.PROXY)
-
-    def test_an_ipv4_mapped_peer_is_matched_as_ipv4(self):
-        self.assertEqual(snrc.client_address("::ffff:172.18.0.1", "203.0.113.7"), "203.0.113.7")
-
-    def test_an_ipv6_client_is_kept(self):
-        self.assertEqual(snrc.client_address(self.PROXY, "2001:db8::7"), "2001:db8::7")
-
-
-class RequestErrorTests(unittest.TestCase):
-    def setUp(self):
-        self.server = snrc.ResolverServer(("127.0.0.1", 0), snrc.Handler)
-
-    def tearDown(self):
-        self.server.server_close()
-
-    def test_a_client_that_hung_up_is_a_warning_without_a_traceback(self):
-        """What an smp-server that gave up after its timeout leaves behind."""
-        with self.assertLogs("snrc_resolve", "WARNING") as logs:
-            try:
-                raise BrokenPipeError
-            except BrokenPipeError:
-                self.server.handle_error(None, ("198.51.100.9", 4000))
-        [record] = logs.records
-        self.assertEqual((record.levelname, record.getMessage(), record.fields["error"]), ("WARNING", "client_gone", "BrokenPipeError"))
-        self.assertIsNone(record.exc_info)
-
-    def test_a_failure_is_an_error_with_its_traceback(self):
-        with self.assertLogs("snrc_resolve", "ERROR") as logs:
-            try:
-                raise KeyError("boom")
-            except KeyError:
-                self.server.handle_error(None, ("198.51.100.9", 4000))
-        [record] = logs.records
-        self.assertEqual((record.getMessage(), record.fields["client"]), ("request_failed", "198.51.100.9"))
-        self.assertIsNotNone(record.exc_info)
-
-
-class KeepAliveTests(unittest.TestCase):
-    """The smp-server keeps a resolver connection only after an HTTP/1.1
-    response, and otherwise connects for every lookup."""
-
-    def setUp(self):
-        self.server = snrc.ResolverServer(("127.0.0.1", 0), snrc.Handler)
-        threading.Thread(target=self.server.serve_forever, args=(0.05,), daemon=True).start()
-        self._saved_timeout = snrc.Handler.timeout
-        self._log = contextlib.redirect_stderr(io.StringIO())
-        self._log.__enter__()
-
-    def tearDown(self):
-        self._log.__exit__(None, None, None)
-        snrc.Handler.timeout = self._saved_timeout
-        self.server.shutdown()
-        self.server.server_close()
-
-    def test_requests_share_one_connection_without_delay(self):
-        conn = http.client.HTTPConnection(*self.server.server_address, timeout=5)
-        start = time.monotonic()
-        for i in range(20):
-            conn.request("GET", "/v2/resolve/x.simplex")
-            res = conn.getresponse()
-            res.read()
-            self.assertEqual((res.version, res.status), (11, 400))
-            if i == 0:
-                sock = conn.sock
-            self.assertIs(conn.sock, sock)
-        conn.close()
-        # a response held by Nagle for the delayed ACK takes ~40 ms, 20 of them over 0.8 s
-        self.assertLess(time.monotonic() - start, 0.5)
-
-    def test_idle_connections_outlast_the_smp_servers(self):
-        """http-client drops a connection idle for 30 s, checked every 5 s. A
-        resolver that closed sooner would race the client reusing it, and one
-        that never closed would keep a thread per dead connection."""
-        self.assertIsNotNone(self._saved_timeout)
-        self.assertGreater(self._saved_timeout, 35)
-
-    def test_an_idle_connection_is_closed(self):
-        snrc.Handler.timeout = 0.2
-        with socket.create_connection(self.server.server_address, timeout=5) as sock:
-            time.sleep(0.5)
-            self.assertEqual(sock.recv(1), b"")
-
-
-@unittest.skipUnless(sys.platform.startswith("linux"), "reads worker processes from /proc")
-class WorkerProcessesTests(unittest.TestCase):
-    """Workers share the port, and the service stops as a whole, so the
-    container restarts rather than serving on fewer workers."""
-
-    def setUp(self):
-        self.node = FakeNode()
-        with socket.socket() as s:
-            s.bind(("127.0.0.1", 0))
-            self.port = s.getsockname()[1]
-        env = dict(os.environ, SNRC_RPC=self.node.url, SNRC_BIND="127.0.0.1", SNRC_PORT=str(self.port), SNRC_WORKERS="2",
-                   SNRC_REGISTRY_TESTING=FakeChain.REGISTRY, SNRC_REGISTRAR_TESTING=FakeChain.REGISTRAR, SNRC_CONTROLLER_TESTING=FakeChain.CONTROLLER)
-        self.service = subprocess.Popen([sys.executable, os.path.join(_HERE, "snrc-resolve.py")], env=env, stderr=subprocess.PIPE, text=True)
-        self.workers = self._wait_for_workers(2)
-
-    def tearDown(self):
-        if self.service.poll() is None:
-            self.service.kill()
-            self.service.wait()
-        self.service.stderr.close()
-        for pid in self.workers:
-            with contextlib.suppress(ProcessLookupError):
-                os.kill(pid, signal.SIGKILL)
-        self.node.stop()
-
-    def _wait_for_workers(self, count):
-        deadline = time.monotonic() + 10
-        while time.monotonic() < deadline:
-            workers = [int(p) for p in os.listdir("/proc") if p.isdigit() and self._parent(p) == self.service.pid]
-            if len(workers) == count and self._serving():
-                return workers
-            time.sleep(0.05)
-        self.fail("workers did not start")
-
-    @staticmethod
-    def _parent(pid):
-        try:
-            with open(f"/proc/{pid}/stat") as f:
-                return int(f.read().rsplit(")", 1)[1].split()[1])
-        except (FileNotFoundError, ProcessLookupError):
-            return None
-
-    def _serving(self):
-        try:
-            with socket.create_connection(("127.0.0.1", self.port), timeout=1):
-                return True
-        except OSError:
-            return False
-
-    def _gone(self, pid):
-        deadline = time.monotonic() + 5
-        while time.monotonic() < deadline:
-            if self._parent(pid) != self.service.pid:
-                return True
-            time.sleep(0.05)
-        return False
-
-    def test_workers_answer_on_the_shared_port(self):
-        for _ in range(20):
-            with urlopen(f"http://127.0.0.1:{self.port}/v2/resolve/acme.testing", timeout=5) as res:
-                self.assertEqual(json.loads(res.read())["registration"]["type"], "registered")
-
-    def test_stopping_the_service_stops_every_worker(self):
-        self.service.send_signal(signal.SIGTERM)
-        self.assertEqual(self.service.wait(timeout=5), 0)
-        self.assertTrue(all(self._gone(pid) for pid in self.workers))
-        self.assertRegex(self.service.stderr.read(), r"INFO  stopping  signal=SIGTERM")
-
-    def test_a_worker_exiting_stops_the_service(self):
-        os.kill(self.workers[0], signal.SIGKILL)
-        self.assertEqual(self.service.wait(timeout=5), 1)
-        self.assertTrue(self._gone(self.workers[1]))
-
-
-TIME = r"\d{4}-\d\d-\d\dT\d\d:\d\d:\d\d\.\d{3}Z"
-
-
-class LogTestCase(unittest.TestCase):
-    def setUp(self):
-        self._saved = (snrc.LOG_FORMAT, snrc.LOG_COLOR, snrc.LOG_LEVEL)
-        snrc.LOG_FORMAT, snrc.LOG_COLOR, snrc.LOG_LEVEL = "text", "never", "info"
-        self.out = io.StringIO()
-
-    def tearDown(self):
-        snrc.LOG_FORMAT, snrc.LOG_COLOR, snrc.LOG_LEVEL = self._saved
-        snrc.LOGGER.handlers[:] = []
-        snrc.LOGGER.setLevel(logging.NOTSET)
-        snrc.LOGGER.propagate = True
-
-    def emit(self, level=logging.INFO, name="request", **fields):
-        snrc.setup_logging(self.out)
-        snrc.log_event(level, name, **fields)
-        return self.out.getvalue()
-
-
-class TextFormatTests(LogTestCase):
-    def test_a_line_is_utc_time_level_event_and_fields(self):
-        line = self.emit(client="203.0.113.7", path="/v2/resolve/[4fdd].testing", status=200, ms=7)
-        self.assertRegex(line, rf"^{TIME} INFO  request  client=203\.0\.113\.7 path=/v2/resolve/\[4fdd\]\.testing status=200 ms=7\n$")
-
-    def test_values_that_would_be_misread_are_quoted(self):
-        line = self.emit(message='says "hi" here', empty="", missing=None, eq="a=b")
-        self.assertIn('message="says \\"hi\\" here" empty="" missing=- eq="a=b"', line)
-
-    def test_levels_are_named_in_five_columns(self):
-        self.assertRegex(self.emit(logging.WARNING, "upstream_error"), rf"^{TIME} WARN  upstream_error\n$")
-
-    def test_below_the_configured_level_nothing_is_written(self):
-        self.assertEqual(self.emit(logging.DEBUG), "")
-
-    def test_an_exception_follows_its_line(self):
-        snrc.setup_logging(self.out)
-        try:
-            raise KeyError("boom")
-        except KeyError:
-            snrc.log_event(logging.ERROR, "request_failed", exc_info=True)
-        self.assertRegex(self.out.getvalue(), rf"(?s)^{TIME} ERROR request_failed\nTraceback .*KeyError: 'boom'\n$")
-
-
-class ColorTests(LogTestCase):
-    def test_colours_mark_the_level_and_the_status_class(self):
-        snrc.LOG_COLOR = "always"
-        line = self.emit(status=503)
-        self.assertIn("\033[32mINFO ", line)
-        self.assertIn("\033[31m503\033[0m", line)
-
-    def test_auto_leaves_output_that_is_no_terminal_plain(self):
-        snrc.LOG_COLOR = "auto"
-        self.assertNotIn("\033[", self.emit(status=200))
-
-    def test_never_is_plain(self):
-        self.assertNotIn("\033[", self.emit(status=200))
-
-
-class JsonFormatTests(LogTestCase):
-    def test_a_line_is_one_json_object(self):
-        snrc.LOG_FORMAT = "json"
-        record = json.loads(self.emit(client="203.0.113.7", status=200, missing=None))
-        self.assertRegex(record.pop("time"), rf"^{TIME}$")
-        self.assertEqual(record, {"level": "info", "event": "request", "client": "203.0.113.7", "status": 200, "missing": None})
-
-    def test_an_exception_is_a_field(self):
-        snrc.LOG_FORMAT = "json"
-        snrc.setup_logging(self.out)
-        try:
-            raise KeyError("boom")
-        except KeyError:
-            snrc.log_event(logging.ERROR, "request_failed", exc_info=True)
-        self.assertIn("KeyError: 'boom'", json.loads(self.out.getvalue())["exception"])
-
-
-class SetupTests(LogTestCase):
-    def test_unknown_settings_are_refused_at_start(self):
-        for setting, value in (("LOG_FORMAT", "yaml"), ("LOG_COLOR", "sometimes"), ("LOG_LEVEL", "loud")):
-            with self.subTest(setting=setting):
-                saved = getattr(snrc, setting)
-                setattr(snrc, setting, value)
-                try:
-                    with self.assertRaisesRegex(ValueError, re.escape(f"SNRC_{setting}")):
-                        snrc.setup_logging(self.out)
-                finally:
-                    setattr(snrc, setting, saved)
+if __name__ == "__main__":
+    unittest.main()

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simplexmq.cabal

@@ -1,7 +1,7 @@
 cabal-version: 3.0
 
 name:           simplexmq
-version:        7.1.0.10
+version:        7.1.0.9
 synopsis:       SimpleXMQ message broker
 description:    This package includes <./docs/Simplex-Messaging-Server.html server>,
                 <./docs/Simplex-Messaging-Client.html client> and
@@ -195,7 +195,6 @@ library
           Simplex.Messaging.Agent.Store.Postgres.Migrations.M20260712_address_dr_rpc
           Simplex.Messaging.Agent.Store.Postgres.Migrations.M20260823_snd_files_entitlement
           Simplex.Messaging.Agent.Store.Postgres.Migrations.M20260919_ratchet_verify_codes
-          Simplex.Messaging.Agent.Store.Postgres.Migrations.M20260929_ratchet_indexes
   else
       exposed-modules:
           Simplex.Messaging.Agent.Store.SQLite
@@ -251,7 +250,6 @@ library
           Simplex.Messaging.Agent.Store.SQLite.Migrations.M20260712_address_dr_rpc
           Simplex.Messaging.Agent.Store.SQLite.Migrations.M20260823_snd_files_entitlement
           Simplex.Messaging.Agent.Store.SQLite.Migrations.M20260919_ratchet_verify_codes
-          Simplex.Messaging.Agent.Store.SQLite.Migrations.M20260929_ratchet_indexes
           Simplex.Messaging.Agent.Store.SQLite.Util
   if flag(client_postgres) || flag(server_postgres)
       exposed-modules:
@@ -273,6 +271,7 @@ library
           Simplex.FileTransfer.Server.Store
           Simplex.FileTransfer.Server.StoreLog
           Simplex.Messaging.Server
+          Simplex.Messaging.Server.AddressStats
           Simplex.Messaging.Server.CLI
           Simplex.Messaging.Server.Control
           Simplex.Messaging.Server.Env.STM
@@ -544,6 +543,7 @@ test-suite simplexmq-test
       AgentTests.ServerChoice
       AgentTests.ShortLinkTests
       CLITests
+      CoreTests.AddressStatsTests
       CoreTests.BatchingTests
       CoreTests.CryptoFileTests
       CoreTests.CryptoTests

src/Simplex/FileTransfer/Server.hs

@@ -25,6 +25,7 @@ import Control.Monad.Reader
 import Control.Monad.Trans.Except
 import qualified Data.Aeson as J
 import Data.Bifunctor (first)
+import qualified Data.ByteString.Base64.URL as B64
 import Data.ByteString.Builder (Builder, byteString)
 import Data.ByteString.Char8 (ByteString)
 import qualified Data.ByteString.Char8 as B
@@ -64,6 +65,7 @@ import Simplex.Messaging.Encoding
 import Simplex.Messaging.Encoding.String
 import Simplex.Messaging.Protocol (BlockingInfo, CommandError (..), EntityId (..), RcvPublicAuthKey, RcvPublicDhKey, RecipientId, SignedTransmission, pattern NoEntity)
 import Simplex.Messaging.Server (controlPortAuth, dummyVerifyCmd, verifyCmdAuthorization)
+import Simplex.Messaging.Server.AddressStats (AddrStats, ServerAddrStats (..), addAddrCounter, addressStatsThread, incAddrCounter, printTopAddresses, withAddrStats)
 import Simplex.Messaging.Server.Control (CPClientRole (..))
 import Simplex.Messaging.Server.Expiration
 import Simplex.Messaging.Server.QueueStore (ServerEntityStatus (..))
@@ -100,7 +102,8 @@ data XFTPTransportRequest = XFTPTransportRequest
     request :: H.Request,
     sendResponse :: H.Response -> IO (),
     sniUsed :: SNICredentialUsed,
-    addCORS :: Bool
+    addCORS :: Bool,
+    clientAddrStats :: Maybe (AddrStats XFTPAddrCounter)
   }
 
 corsHeaders :: Bool -> [N.Header]
@@ -140,6 +143,7 @@ xftpServer cfg@XFTPServerConfig {xftpPort, transportConfig, inactiveClientExpira
         : expireFiles fileExpiration
         : serverStatsThread_ cfg
           <> prometheusMetricsThread_ cfg
+          <> addressStatsThread_ cfg
           <> controlPortThread_ cfg
     )
     `finally` stopServer
@@ -153,20 +157,27 @@ xftpServer cfg@XFTPServerConfig {xftpPort, transportConfig, inactiveClientExpira
         Left e -> putStrLn ("Server has no valid key: " <> show e) >> exitFailure
       env <- ask
       sessions <- liftIO TM.emptyIO
+      sessionAddrStats <- liftIO TM.emptyIO
+      stats_ <- asks addrStats
       let cleanup sessionId = atomically $ TM.delete sessionId sessions
+          withConnection sock sessionId handler =
+            withAddrStats (addrStatsMap <$> stats_) sock $ \case
+              Just s -> (atomically (TM.insert sessionId s sessionAddrStats) >> handler) `finally` atomically (TM.delete sessionId sessionAddrStats)
+              Nothing -> handler
           srvParams = if isJust httpCreds_ then defaultSupportedParamsHTTPS else defaultSupportedParams
       webCanonicalRoot_ <- liftIO $ mapM canonicalizePath (webStaticPath cfg)
-      liftIO . runHTTP2Server started xftpPort defaultHTTP2BufferSize srvParams srvCreds httpCreds_ transportConfig inactiveClientExpiration cleanup $ \sniUsed sessionId sessionALPN r sendResponse -> do
+      liftIO . runHTTP2Server started xftpPort defaultHTTP2BufferSize srvParams srvCreds httpCreds_ transportConfig inactiveClientExpiration cleanup withConnection $ \sniUsed sessionId sessionALPN r sendResponse -> do
         let addCORS' = sniUsed && addCORSHeaders transportConfig
         case H.requestMethod r of
           Just "OPTIONS" | addCORS' -> sendResponse $ H.responseNoBody N.ok200 corsPreflightHeaders
           Just "GET" | sniUsed -> forM_ webCanonicalRoot_ $ \root -> serveStaticPageH2 root r sendResponse
           _ -> do
             reqBody <- getHTTP2Body r xftpBlockSize
+            clientAddrStats <- TM.lookupIO sessionId sessionAddrStats
             let v = VersionXFTP 1
                 thServerVRange = versionToRange v
                 thParams0 = THandleParams {sessionId, blockSize = xftpBlockSize, thVersion = v, thServerVRange, thAuth = Nothing, implySessId = False, encryptBlock = Nothing, serviceAuth = False, serverInfo = Nothing}
-                req0 = XFTPTransportRequest {thParams = thParams0, request = r, reqBody, sendResponse, sniUsed, addCORS = addCORS'}
+                req0 = XFTPTransportRequest {thParams = thParams0, request = r, reqBody, sendResponse, sniUsed, addCORS = addCORS', clientAddrStats}
             flip runReaderT env $ case sessionALPN of
               Nothing -> processRequest req0
               Just alpn
@@ -329,24 +340,30 @@ xftpServer cfg@XFTPServerConfig {xftpPort, transportConfig, inactiveClientExpira
       [savePrometheusMetrics interval prometheusMetricsFile]
     prometheusMetricsThread_ _ = []
 
+    addressStatsThread_ :: XFTPServerConfig s -> [M s ()]
+    addressStatsThread_ XFTPServerConfig {addressStats = Just statsCfg} = [asks addrStats >>= mapM_ (liftIO . addressStatsThread statsCfg)]
+    addressStatsThread_ _ = []
+
     savePrometheusMetrics :: Int -> FilePath -> M s ()
     savePrometheusMetrics saveInterval metricsFile = do
       labelMyThread "savePrometheusMetrics"
       liftIO $ putStrLn $ "Prometheus metrics saved every " <> show saveInterval <> " seconds to " <> metricsFile
       ss <- asks serverStats
+      stats_ <- asks addrStats
       rtsOpts <- liftIO $ maybe ("set " <> rtsOptionsEnv) T.pack <$> lookupEnv (T.unpack rtsOptionsEnv)
       let interval = 1000000 * saveInterval
       liftIO $ forever $ do
         threadDelay interval
         ts <- getCurrentTime
-        sm <- getFileServerMetrics ss rtsOpts
+        sm <- getFileServerMetrics ss stats_ rtsOpts
         T.writeFile metricsFile $ xftpPrometheusMetrics sm ts
 
-    getFileServerMetrics :: FileServerStats -> T.Text -> IO FileServerMetrics
-    getFileServerMetrics ss rtsOptions = do
+    getFileServerMetrics :: FileServerStats -> Maybe (ServerAddrStats XFTPAddrCounter) -> T.Text -> IO FileServerMetrics
+    getFileServerMetrics ss stats_ rtsOptions = do
       d <- getFileServerStatsData ss
       let fd = periodStatDataCounts $ _filesDownloaded d
-      pure FileServerMetrics {statsData = d, filesDownloadedPeriods = fd, rtsOptions}
+      addressHistograms <- mapM (readIORef . addrHistograms) stats_
+      pure FileServerMetrics {statsData = d, filesDownloadedPeriods = fd, rtsOptions, addressHistograms}
 
     controlPortThread_ :: XFTPServerConfig s -> [M s ()]
     controlPortThread_ XFTPServerConfig {controlPort = Just port} = [runCPServer port]
@@ -401,7 +418,10 @@ xftpServer cfg@XFTPServerConfig {xftpPort, transportConfig, inactiveClientExpira
                   (fr, _) <- ExceptT $ liftIO $ getFile fs SFRecipient fileId
                   ExceptT $ blockServerFile fr info
                 liftIO . hPutStrLn h $ either (\e -> "error: " <> show e) (\() -> "ok") r
-              CPHelp -> hPutStrLn h "commands: stats-rts, delete, help, quit"
+              CPAddresses name n_ -> withUserRole $ do
+                stats_ <- unliftIO u $ asks addrStats
+                printTopAddresses h (addrStatsMap <$> stats_) name n_
+              CPHelp -> hPutStrLn h "commands: stats-rts, delete, addresses, help, quit"
               CPQuit -> pure ()
               CPSkip -> pure ()
               where
@@ -420,21 +440,23 @@ data ServerFile = ServerFile
   }
 
 processRequest :: FileStoreClass s => XFTPTransportRequest -> M s ()
-processRequest XFTPTransportRequest {thParams, reqBody = body@HTTP2Body {bodyHead}, sendResponse, addCORS}
-  | B.length bodyHead /= xftpBlockSize = sendXFTPResponse ("", NoEntity, FRErr BLOCK) Nothing
+processRequest XFTPTransportRequest {thParams, reqBody = body@HTTP2Body {bodyHead}, sendResponse, addCORS, clientAddrStats}
+  | B.length bodyHead /= xftpBlockSize = incAddrStats XACErrors >> sendXFTPResponse ("", NoEntity, FRErr BLOCK) Nothing
   | otherwise =
       case xftpDecodeTServer thParams bodyHead of
-        Right (Right t@(_, _, (corrId, fId, _))) -> do
+        Right (Right t@(_, _, (corrId, fId, cmd))) -> do
+          incAddrStats $ xftpCmdCounter cmd
           let THandleParams {thAuth} = thParams
               ent = peerEntitlement =<< thAuth
           verifyXFTPTransmission thAuth t >>= \case
-            VRVerified req -> uncurry send =<< processXFTPRequest ent body req
-            VRFailed e -> send (FRErr e) Nothing
+            VRVerified req -> uncurry send =<< processXFTPRequest clientAddrStats ent body req
+            VRFailed e -> incAddrStats XACErrors >> send (FRErr e) Nothing
           where
             send resp = sendXFTPResponse (corrId, fId, resp)
-        Right (Left (corrId, fId, e)) -> sendXFTPResponse (corrId, fId, FRErr e) Nothing
-        Left e -> sendXFTPResponse ("", NoEntity, FRErr e) Nothing
+        Right (Left (corrId, fId, e)) -> incAddrStats XACErrors >> sendXFTPResponse (corrId, fId, FRErr e) Nothing
+        Left e -> incAddrStats XACErrors >> sendXFTPResponse ("", NoEntity, FRErr e) Nothing
   where
+    incAddrStats c = liftIO $ forM_ clientAddrStats (`incAddrCounter` c)
     sendXFTPResponse t' serverFile_ = do
       let t_ = xftpEncodeTransmission thParams t'
 #ifdef slow_servers
@@ -489,8 +511,8 @@ verifyXFTPTransmission thAuth (tAuth, authorized, (corrId, fId, cmd)) =
     -- TODO verify with DH authorization
     req `verifyWith` k = if verifyCmdAuthorization thAuth tAuth authorized corrId k then VRVerified req else VRFailed AUTH
 
-processXFTPRequest :: forall s. FileStoreClass s => Maybe SessionEntitlement -> HTTP2Body -> XFTPRequest -> M s (FileResponse, Maybe ServerFile)
-processXFTPRequest ent HTTP2Body {bodyPart} = \case
+processXFTPRequest :: forall s. FileStoreClass s => Maybe (AddrStats XFTPAddrCounter) -> Maybe SessionEntitlement -> HTTP2Body -> XFTPRequest -> M s (FileResponse, Maybe ServerFile)
+processXFTPRequest addrStats_ ent HTTP2Body {bodyPart} = \case
   XFTPReqNew file rks auth storageHours -> noFile =<< ifM allowNew (createFile file rks storageHours) (pure $ FRErr AUTH)
     where
       allowNew = do
@@ -508,6 +530,10 @@ processXFTPRequest ent HTTP2Body {bodyPart} = \case
   XFTPReqPing -> noFile FRPong
   where
     noFile resp = pure (resp, Nothing)
+    addAddrStats :: XFTPAddrCounter -> Int -> M s ()
+    addAddrStats c n = liftIO $ forM_ addrStats_ $ \s -> addAddrCounter s c n
+    kilobytes :: Word32 -> Int
+    kilobytes bytes = (fromIntegral bytes + 1023) `div` 1024
     createFile :: FileInfo -> NonEmpty RcvPublicAuthKey -> Maybe Word32 -> M s FileResponse
     createFile file rks storageHours = do
       st <- asks fileStore
@@ -531,6 +557,7 @@ processXFTPRequest ent HTTP2Body {bodyPart} = \case
         stats <- asks serverStats
         lift $ incFileStat filesCreated
         liftIO $ atomicModifyIORef'_ (fileRecipients stats) (+ length rks)
+        lift $ addAddrStats XACRecipients $ length rks
         let rIds = L.map (\(FileRecipient rId _) -> rId) rcps
         pure $ FRSndIds sId rIds (Just (GSTExpires (roundedSeconds fileExpiresAt)))
       pure $ either FRErr id r
@@ -566,6 +593,7 @@ processXFTPRequest ent HTTP2Body {bodyPart} = \case
         lift $ withFileLog $ \sl -> logAddRecipients sl sId rcps
         stats <- asks serverStats
         liftIO $ atomicModifyIORef'_ (fileRecipients stats) (+ length rks)
+        lift $ addAddrStats XACRecipients $ length rks
         let rIds = L.map (\(FileRecipient rId _) -> rId) rcps
         pure $ FRRcvIds rIds
       pure $ either FRErr id r
@@ -593,7 +621,7 @@ processXFTPRequest ent HTTP2Body {bodyPart} = \case
               \used -> let used' = used + fromIntegral size in if used' <= quota then (True, used') else (False, used)
           receive = do
             path <- asks $ filesPath . config
-            let fPath = path </> serverFileName senderId
+            let fPath = path </> B.unpack (B64.encode $ unEntityId senderId)
             receiveChunk (XFTPRcvChunkSpec fPath size digest) >>= \case
               Right () -> do
                 stats <- asks serverStats
@@ -604,6 +632,7 @@ processXFTPRequest ent HTTP2Body {bodyPart} = \case
                     incFileStat filesUploaded
                     incFileStat filesCount
                     liftIO $ atomicModifyIORef'_ (filesSize stats) (+ fromIntegral size)
+                    addAddrStats XACUploadKb $ kilobytes size
                     pure FROk
                   Left _e -> do
                     us <- asks usedStorage
@@ -633,6 +662,7 @@ processXFTPRequest ent HTTP2Body {bodyPart} = \case
                   stats <- asks serverStats
                   incFileStat fileDownloads
                   liftIO $ updatePeriodStats (filesDownloaded stats) senderId
+                  addAddrStats XACDownloadKb $ kilobytes size
                   pure (FRFile sDhKey cbNonce, Just ServerFile {filePath = path, fileSize = size, sbState})
                 _ -> pure (FRErr INTERNAL, Nothing)
         _ -> pure (FRErr NO_FILE, Nothing)

src/Simplex/FileTransfer/Server/Control.hs

@@ -7,15 +7,18 @@ module Simplex.FileTransfer.Server.Control
 where
 
 import qualified Data.Attoparsec.ByteString.Char8 as A
+import Data.Text (Text)
 import Simplex.FileTransfer.Protocol (XFTPFileId)
 import Simplex.Messaging.Encoding.String
 import Simplex.Messaging.Protocol (BasicAuth, BlockingInfo)
+import Simplex.Messaging.Server.AddressStats (addressesArgs, addressesArgsP)
 
 data ControlProtocol
   = CPAuth BasicAuth
   | CPStatsRTS
   | CPDelete XFTPFileId
   | CPBlock XFTPFileId BlockingInfo
+  | CPAddresses Text (Maybe Int)
   | CPHelp
   | CPQuit
   | CPSkip
@@ -26,6 +29,7 @@ instance StrEncoding ControlProtocol where
     CPStatsRTS -> "stats-rts"
     CPDelete fId -> strEncode (Str "delete", fId)
     CPBlock fId info -> strEncode (Str "block", fId, info)
+    CPAddresses name n_ -> "addresses " <> addressesArgs name n_
     CPHelp -> "help"
     CPQuit -> "quit"
     CPSkip -> ""
@@ -35,6 +39,7 @@ instance StrEncoding ControlProtocol where
       "stats-rts" -> pure CPStatsRTS
       "delete" -> CPDelete <$> _strP
       "block" -> CPBlock <$> _strP <*> _strP
+      "addresses" -> uncurry CPAddresses <$> addressesArgsP
       "help" -> pure CPHelp
       "quit" -> pure CPQuit
       "" -> pure CPSkip

src/Simplex/FileTransfer/Server/Env.hs

@@ -16,6 +16,8 @@ module Simplex.FileTransfer.Server.Env
     XFTPStoreConfig (..),
     XFTPEnv (..),
     XFTPRequest (..),
+    XFTPAddrCounter (..),
+    xftpCmdCounter,
     XFTPStoreType,
     FileStore (..),
     AFStoreType (..),
@@ -45,7 +47,7 @@ import Data.Word (Word16, Word32)
 import Data.X509.Validation (Fingerprint (..))
 import Network.Socket
 import qualified Network.TLS as T
-import Simplex.FileTransfer.Protocol (FileCmd, FileInfo (..), XFTPFileId)
+import Simplex.FileTransfer.Protocol (FileCmd (..), FileCommand (..), FileInfo (..), XFTPFileId)
 import Simplex.FileTransfer.Server.Stats
 import Data.Either (fromRight)
 import Data.Ini (Ini, lookupValue)
@@ -67,6 +69,7 @@ import Simplex.FileTransfer.Transport (VersionRangeXFTP)
 import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Crypto.BBS (BBSPublicKey)
 import Simplex.Messaging.Protocol (BasicAuth, RcvPublicAuthKey)
+import Simplex.Messaging.Server.AddressStats (AddrCounter (..), AddressStatsConfig, ServerAddrStats, countBounds, kilobyteBounds, newServerAddrStats)
 import Simplex.Messaging.Server.Expiration
 import Simplex.Messaging.Server.Information (ServerPublicInfo)
 import Simplex.Messaging.Transport (EntitlementConfig (..))
@@ -115,6 +118,7 @@ data XFTPServerConfig s = XFTPServerConfig
     serverStatsBackupFile :: Maybe FilePath,
     prometheusInterval :: Maybe Int,
     prometheusMetricsFile :: FilePath,
+    addressStats :: Maybe AddressStatsConfig,
     transportConfig :: TransportServerConfig,
     responseDelay :: Int,
     webStaticPath :: Maybe FilePath
@@ -136,9 +140,55 @@ data XFTPEnv s = XFTPEnv
     serverIdentity :: C.KeyHash,
     tlsServerCreds :: T.Credential,
     httpServerCreds :: Maybe T.Credential,
-    serverStats :: FileServerStats
+    serverStats :: FileServerStats,
+    addrStats :: Maybe (ServerAddrStats XFTPAddrCounter)
   }
 
+data XFTPAddrCounter
+  = XACConnections
+  | XACErrors
+  | XACFNew
+  | XACFAdd
+  | XACFPut
+  | XACFDel
+  | XACFGet
+  | XACFAck
+  | XACPing
+  | XACUploadKb
+  | XACDownloadKb
+  | XACRecipients
+  deriving (Eq, Ord, Enum, Bounded, Show)
+
+instance AddrCounter XFTPAddrCounter where
+  counterName = \case
+    XACConnections -> "connections"
+    XACErrors -> "errors"
+    XACFNew -> "FNEW"
+    XACFAdd -> "FADD"
+    XACFPut -> "FPUT"
+    XACFDel -> "FDEL"
+    XACFGet -> "FGET"
+    XACFAck -> "FACK"
+    XACPing -> "PING"
+    XACUploadKb -> "upload_kb"
+    XACDownloadKb -> "download_kb"
+    XACRecipients -> "recipients"
+  counterBounds = \case
+    XACUploadKb -> kilobyteBounds
+    XACDownloadKb -> kilobyteBounds
+    _ -> countBounds
+  connectionsCounter = XACConnections
+
+xftpCmdCounter :: FileCmd -> XFTPAddrCounter
+xftpCmdCounter (FileCmd _ cmd) = case cmd of
+  FNEW {} -> XACFNew
+  FADD _ -> XACFAdd
+  FPUT -> XACFPut
+  FDEL -> XACFDel
+  FGET _ -> XACFGet
+  FACK -> XACFAck
+  PING -> XACPing
+
 fileStore :: XFTPEnv s -> s
 fileStore = fromFileStore . store
 {-# INLINE fileStore #-}
@@ -182,7 +232,7 @@ defaultFileExpiration =
     }
 
 newXFTPServerEnv :: FileStoreClass s => XFTPServerConfig s -> IO (XFTPEnv s)
-newXFTPServerEnv config@XFTPServerConfig {serverStoreCfg, fileSizeQuota, fileExpiration, fileStorageEntitlements, xftpCredentials, httpCredentials} = do
+newXFTPServerEnv config@XFTPServerConfig {serverStoreCfg, fileSizeQuota, fileExpiration, fileStorageEntitlements, xftpCredentials, httpCredentials, addressStats} = do
   let defaultMax = ttl fileExpiration
       belowDefault = M.filter ((< defaultMax) . storageTime) fileStorageEntitlements
   unless (M.null belowDefault) $ do
@@ -210,7 +260,8 @@ newXFTPServerEnv config@XFTPServerConfig {serverStoreCfg, fileSizeQuota, fileExp
   httpServerCreds <- mapM loadServerCredential httpCredentials
   Fingerprint fp <- loadFingerprint xftpCredentials
   serverStats <- newFileServerStats =<< getCurrentTime
-  pure XFTPEnv {config, store, usedStorage, storeLog, random, tlsServerCreds, httpServerCreds, serverIdentity = C.KeyHash fp, serverStats}
+  addrStats <- mapM (const newServerAddrStats) addressStats
+  pure XFTPEnv {config, store, usedStorage, storeLog, random, tlsServerCreds, httpServerCreds, serverIdentity = C.KeyHash fp, serverStats, addrStats}
 
 data XFTPRequest
   = XFTPReqNew FileInfo (NonEmpty RcvPublicAuthKey) (Maybe BasicAuth) (Maybe Word32)

src/Simplex/FileTransfer/Server/Main.hs

@@ -204,6 +204,8 @@ xftpServerCLI_ generateSite serveStaticFiles cfgPath logPath = do
                \disconnect = off\n"
             <> ("# ttl = " <> tshow (ttl defaultInactiveClientExpiration) <> "\n")
             <> ("# check_interval = " <> tshow (checkInterval defaultInactiveClientExpiration) <> "\n")
+            <> "\n"
+            <> addressStatsIniContent
             <> "\n\
                \[WEB]\n\
                \# Set path to generate static mini-site for server information\n"
@@ -325,6 +327,7 @@ xftpServerCLI_ generateSite serveStaticFiles cfgPath logPath = do
               serverStatsBackupFile = logStats $> combine logPath "file-server-stats.log",
               prometheusInterval = eitherToMaybe (lookupValue "STORE_LOG" "prometheus_interval" ini) >>= readMaybe . T.unpack,
               prometheusMetricsFile = combine logPath "xftp-server-metrics.txt",
+              addressStats = iniAddressStats ini,
               transportConfig =
                 let cfg =
                       mkTransportServerConfig

src/Simplex/FileTransfer/Server/Prometheus.hs

@@ -11,12 +11,15 @@ module Simplex.FileTransfer.Server.Prometheus
   ) where
 
 import Data.Int (Int64)
+import Data.Map.Strict (Map)
 import Data.Text (Text)
 import qualified Data.Text as T
 import Data.Time.Clock (UTCTime (..), diffUTCTime)
 import Data.Time.Clock.System (systemEpochDay)
 import Data.Time.Format.ISO8601 (iso8601Show)
+import Simplex.FileTransfer.Server.Env (XFTPAddrCounter)
 import Simplex.FileTransfer.Server.Stats
+import Simplex.Messaging.Server.AddressStats (AddrHistogram, addrHistogramMetrics)
 import Simplex.Messaging.Server.Stats (PeriodStatCounts (..))
 import Simplex.Messaging.Transport (simplexMQVersion)
 import Simplex.Messaging.Util (tshow)
@@ -24,7 +27,8 @@ import Simplex.Messaging.Util (tshow)
 data FileServerMetrics = FileServerMetrics
   { statsData :: FileServerStatsData,
     filesDownloadedPeriods :: PeriodStatCounts,
-    rtsOptions :: Text
+    rtsOptions :: Text,
+    addressHistograms :: Maybe (Map XFTPAddrCounter AddrHistogram)
   }
 
 rtsOptionsEnv :: Text
@@ -33,9 +37,9 @@ rtsOptionsEnv = "XFTP_RTS_OPTIONS"
 {-# FOURMOLU_DISABLE\n#-}
 xftpPrometheusMetrics :: FileServerMetrics -> UTCTime -> Text
 xftpPrometheusMetrics sm ts =
-  time <> files <> info
+  time <> files <> clientAddresses <> info
   where
-    FileServerMetrics {statsData, filesDownloadedPeriods, rtsOptions} = sm
+    FileServerMetrics {statsData, filesDownloadedPeriods, rtsOptions, addressHistograms} = sm
     FileServerStatsData
       { _fromTime,
         _filesCreated,
@@ -122,6 +126,7 @@ xftpPrometheusMetrics sm ts =
       \simplex_xftp_files_count_monthly " <> mstr (monthCount filesDownloadedPeriods) <> "\n\
       \# filesDownloaded.monthCount\n\
       \\n"
+    clientAddresses = maybe "" (addrHistogramMetrics "simplex_xftp" tsEpoch) addressHistograms
     info =
       "# Info\n\
       \# ----\n\

src/Simplex/FileTransfer/Server/StoreLog.hs

@@ -17,7 +17,6 @@ module Simplex.FileTransfer.Server.StoreLog
     logDeleteFile,
     logBlockFile,
     logAckFile,
-    serverFileName,
   )
 where
 
@@ -25,7 +24,6 @@ import Control.Applicative (optional, (<|>))
 import Control.Concurrent.STM
 import Control.Monad.Except
 import qualified Data.Attoparsec.ByteString.Char8 as A
-import qualified Data.ByteString.Base64.URL as B64
 import qualified Data.ByteString.Char8 as B
 import qualified Data.ByteString.Lazy.Char8 as LB
 import Data.Composition ((.:), (.::.))
@@ -37,11 +35,10 @@ import Simplex.FileTransfer.Protocol (FileInfo (..))
 import Simplex.FileTransfer.Server.Store
 import Simplex.FileTransfer.Transport (XFTPErrorType (..))
 import Simplex.Messaging.Encoding.String
-import Simplex.Messaging.Protocol (BlockingInfo, EntityId (..), RcvPublicAuthKey, RecipientId, SenderId)
+import Simplex.Messaging.Protocol (BlockingInfo, RcvPublicAuthKey, RecipientId, SenderId)
 import Simplex.Messaging.Server.QueueStore (ServerEntityStatus (..))
 import Simplex.Messaging.Server.StoreLog
 import Simplex.Messaging.Util (bshow)
-import System.FilePath (takeFileName)
 import System.IO
 
 data FileStoreLogRecord
@@ -102,9 +99,6 @@ logBlockFile s fId = logFileStoreRecord s . BlockFile fId
 logAckFile :: StoreLog 'WriteMode -> RecipientId -> IO ()
 logAckFile s = logFileStoreRecord s . AckFile
 
-serverFileName :: SenderId -> FilePath
-serverFileName = B.unpack . B64.encode . unEntityId
-
 readWriteFileStore :: FilePath -> STMFileStore -> IO (StoreLog 'WriteMode)
 readWriteFileStore = readWriteStoreLog readFileStore writeFileStore
 
@@ -121,9 +115,7 @@ readFileStore f st = mapM_ (addFileLogRecord . LB.toStrict) . LB.lines =<< LB.re
       AddFile sId file createdAt expiresAt status
         | size file > 0 -> addFile st sId file createdAt expiresAt status
         | otherwise -> pure $ Left SIZE
-      PutFile qId path
-        | takeFileName path == serverFileName qId -> setFilePath st qId path
-        | otherwise -> pure $ Left AUTH
+      PutFile qId path -> setFilePath st qId path
       AddRecipients sId rcps -> runExceptT $ addRecipients sId rcps
       DeleteFile sId -> deleteFile st sId
       BlockFile sId info -> blockFile st sId info True

src/Simplex/Messaging/Agent.hs

@@ -266,7 +266,7 @@ import Simplex.RemoteControl.Invitation
 import Simplex.RemoteControl.Types
 import System.Mem.Weak (deRefWeak)
 import UnliftIO.Async (mapConcurrently)
-import UnliftIO.Concurrent (forkFinally, forkIO, forkIOWithUnmask, killThread, mkWeakThreadId, threadDelay)
+import UnliftIO.Concurrent (forkFinally, forkIO, killThread, mkWeakThreadId, threadDelay)
 import qualified UnliftIO.Exception as E
 import UnliftIO.STM
 
@@ -713,39 +713,14 @@ setNetworkConfig c@AgentClient {useNetworkConfig, proxySessTs} cfg' = do
   when changed $ liftIO $ reconnectAllServers c
 
 setUserNetworkInfo :: AgentClient -> UserNetworkInfo -> IO ()
-setUserNetworkInfo c@AgentClient {userNetworkInfo, userNetworkUpdated, networkEventSeq} ni = withAgentEnv' c $ do
+setUserNetworkInfo c@AgentClient {userNetworkInfo, userNetworkUpdated} ni = withAgentEnv' c $ do
   ts' <- liftIO getCurrentTime
   i <- asks $ userOfflineDelay . config
   -- if network offline event happens in less than `userOfflineDelay` after the previous event, it is ignored
-  -- mask, so that the thread restoring the deferred online network info is always forked
-  liftIO $ E.mask_ $ do
-    event <- atomically $ do
-      update <- (isOnline ni ||) <$> notRecentlyChanged ts' i
-      if update
-        then do
-          writeTVar userNetworkUpdated $ Just ts'
-          -- when the agent was offline the reported info is applied when the clients are closed,
-          -- so that the workers waiting for the network do not resume before then
-          wasOnline <- isOnline <$> readTVar userNetworkInfo
-          writeTVar userNetworkInfo $ if wasOnline || not (isOnline ni) then ni else ni {online = False}
-          modifyTVar' networkEventSeq (+ 1)
-          Just <$> readTVar networkEventSeq
-        else pure Nothing
-    -- The client reports online network when it changes. The connections to the servers made via
-    -- the previous network are likely to be dead, but the OS may only report it after several minutes.
-    forM_ event $ \e -> when (isOnline ni) $ void $ forkIOWithUnmask $ \unmask ->
-      unmask (closeClients e) `E.finally` networkOnline e
+  atomically . whenM ((isOnline ni ||) <$> notRecentlyChanged ts' i) $ do
+    writeTVar userNetworkInfo ni
+    writeTVar userNetworkUpdated $ Just ts'
   where
-    -- skipped when a newer info superseded this one - it closes the clients itself, and the ones
-    -- that stay connected while the network is offline are closed by the next online info
-    closeClients e = do
-      whenCurrent $ closeNetworkClients c smpClients
-      whenCurrent $ closeNetworkClients c ntfClients
-      whenCurrent $ closeProtocolServerClients c xftpClients
-      where
-        whenCurrent = whenM (atomically $ isCurrent e)
-    networkOnline e = atomically $ whenM (isCurrent e) $ writeTVar userNetworkInfo ni
-    isCurrent e = (e ==) <$> readTVar networkEventSeq
     notRecentlyChanged ts' i =
       maybe True (\ts -> diffUTCTime ts' ts > i) <$> readTVar userNetworkUpdated
 
@@ -1350,7 +1325,7 @@ newRcvConnSrv c nm userId connId enableNtfs cMode userLinkData_ clientData pqIni
     Just d -> do
       (nonce, qUri, cReq, qd) <- prepareLinkData addrKeys_ (setLinkDataRatchetKeys addrKeys_ d) $ fst e2eKeys
       (rq, qUri') <- createRcvQueue c nm userId connId srvWithAuth enableNtfs subMode (Just nonce) qd e2eKeys
-      connReqWithShortLink pqInitKeys qUri cReq qUri' rq
+      connReqWithShortLink qUri cReq qUri' (shortLink rq)
     Nothing -> do
       let qd = case cMode of SCMContact -> CQRContact Nothing; SCMInvitation -> CQRMessaging Nothing
       (_rq, qUri) <- createRcvQueue c nm userId connId srvWithAuth enableNtfs subMode Nothing qd e2eKeys
@@ -1397,19 +1372,23 @@ newRcvConnSrv c nm userId connId enableNtfs cMode userLinkData_ clientData pqIni
           srvData <- liftError id $ SL.encryptLinkData g k linkData
           pure $ CQRMessaging $ Just CQRData {linkKey, privSigKey, srvReq = (sndId, srvData)}
       pure (nonce, qUri, connReq, qd)
-
-connReqWithShortLink :: CR.InitialKeys -> SMPQueueUri -> ConnectionRequestUri c -> SMPQueueUri -> RcvQueue -> AM (CreatedConnLink c)
-connReqWithShortLink pqInitKeys qUri cReq qUri' RcvQueue {server = srv, shortLink} = case shortLink of
-  Just ShortLinkCreds {shortLinkId, shortLinkKey}
-    | qUri == qUri' -> pure $ case cReq of
-        CRContactUri _ _ -> CCLink cReq $ Just $ CSLContact SLSServer CCTContact srv shortLinkKey
-        CRInvitationUri crData (CR.E2ERatchetParamsUri vr k1 k2 _) ->
-          let cReq' = case pqInitKeys of
-                CR.IKPQOn -> CRInvitationUri crData $ CR.E2ERatchetParamsUri vr k1 k2 Nothing -- remove PQ keys
-                _ -> cReq -- either PQ is disabled, or disabled for initial request because there is no short link
-           in CCLink cReq' $ Just $ CSLInvitation SLSServer srv shortLinkId shortLinkKey
-    | otherwise -> throwE $ INTERNAL "different rcv queue address"
-  Nothing -> throwE $ INTERNAL "no short link credentials"
+    connReqWithShortLink :: SMPQueueUri -> ConnectionRequestUri c -> SMPQueueUri -> Maybe ShortLinkCreds -> AM (CreatedConnLink c)
+    connReqWithShortLink qUri cReq qUri' shortLink = case shortLink of
+      Just ShortLinkCreds {shortLinkId, shortLinkKey}
+        | qUri == qUri' -> pure $ case cReq of
+            CRContactUri _ _ -> CCLink cReq $ Just $ CSLContact SLSServer CCTContact srv shortLinkKey
+            CRInvitationUri crData (CR.E2ERatchetParamsUri vr k1 k2 _) ->
+              let cReq' = case pqInitKeys of
+                    CR.IKPQOn -> CRInvitationUri crData $ CR.E2ERatchetParamsUri vr k1 k2 Nothing -- remove PQ keys
+                    _ -> cReq -- either PQ is disabled, or disabled for initial request because there is no short link
+               in CCLink cReq' $ Just $ CSLInvitation SLSServer srv shortLinkId shortLinkKey
+        | otherwise -> throwE $ INTERNAL "different rcv queue address"
+      Nothing ->
+        let updated (ConnReqUriData _ vr _ _) = (ConnReqUriData SSSimplex vr [qUri'] clientData)
+            cReq' = case cReq of
+              CRContactUri crData rk -> CRContactUri (updated crData) rk
+              CRInvitationUri crData e2eParams -> CRInvitationUri (updated crData) e2eParams
+         in pure $ CCLink cReq' Nothing
 
 newQueueNtfServer :: AM (Maybe NtfServer)
 newQueueNtfServer = fmap ntfServer_ . readTVarIO . ntfTkn =<< asks ntfSupervisor
@@ -2456,66 +2435,62 @@ enqueueMessageB c reqs = do
   cfg <- asks config
   (_, reqMids) <- unsafeWithStore c $ \db -> do
     mapAccumLM (\ids r -> storeSentMsg db cfg ids r `E.catchAny` \e -> (ids,) <$> handleInternal e) IM.empty reqs
-  forME reqMids $ submitSentMsg c
+  forME reqMids $ \((csqs_, _, _, _), InternalId msgId, pqSecr) -> forM csqs_ $ \(cData, sq :| sqs) -> do
+    submitPendingMsg c sq
+    let sqs' = filter (isActiveSndQ cData) sqs
+    pure ((msgId, pqSecr), if null sqs' then Nothing else Just (sqs', msgId))
   where
+    storeSentMsg ::
+      DB.Connection ->
+      AgentConfig ->
+      IntMap (Maybe Int64, AMessage) ->
+      Either AgentErrorType (Either AgentErrorType (ConnData, NonEmpty SndQueue), Maybe PQEncryption, MsgFlags, ValueOrRef AMessage) ->
+      IO (IntMap (Maybe Int64, AMessage), Either AgentErrorType ((Either AgentErrorType (ConnData, NonEmpty SndQueue), Maybe PQEncryption, MsgFlags, ValueOrRef AMessage), InternalId, PQEncryption))
+    storeSentMsg db cfg aMessageIds = \case
+      Left e -> pure (aMessageIds, Left e)
+      Right req@(csqs_, pqEnc_, msgFlags, mbr) -> case mbr of
+        VRValue i_ aMessage -> case i_ >>= (`IM.lookup` aMessageIds) of
+          Just _ -> pure (aMessageIds, Left $ INTERNAL "enqueueMessageB: storeSentMsg duplicate saved message body")
+          Nothing -> do
+            (mbId_, r) <- case csqs_ of
+              Left e -> pure (Nothing, Left e)
+              Right (cData, sq :| _) -> do
+                mbId <- createSndMsgBody db aMessage
+                (Just mbId,) <$> storeSentMsg_ cData sq mbId aMessage
+            let aMessageIds' = maybe id (`IM.insert` (mbId_, aMessage)) i_ aMessageIds
+            pure (aMessageIds', r)
+        VRRef i -> case csqs_ of
+          Left e -> pure $ (aMessageIds, Left e)
+          Right (cData, sq :| _) -> case IM.lookup i aMessageIds of
+            Just (Just mbId, aMessage) -> (aMessageIds,) <$> storeSentMsg_ cData sq mbId aMessage
+            Just (Nothing, aMessage) -> do
+              mbId <- createSndMsgBody db aMessage
+              let aMessageIds' = IM.insert i (Just mbId, aMessage) aMessageIds
+              (aMessageIds',) <$> storeSentMsg_ cData sq mbId aMessage
+            Nothing -> pure (aMessageIds, Left $ INTERNAL "enqueueMessageB: storeSentMsg missing saved message body id")
+        where
+          storeSentMsg_ cData@ConnData {connId} sq sndMsgBodyId aMessage = fmap (first storeError) $ runExceptT $ do
+            let AgentConfig {e2eEncryptVRange} = cfg
+            internalTs <- liftIO getCurrentTime
+            (internalId, internalSndId, prevMsgHash) <- ExceptT $ updateSndIds db connId
+            -- We need to do pre-flight encoding that is not stored in database
+            -- to calculate its hash and remember it on connection (createSndMsg -> updateSndMsgHash)
+            -- to enable next enqueue.
+            -- (As encoding is different per connection, we can't store shared body, so it's repeated on delivery)
+            let agentMsgStr = encodeAgentMsgStr aMessage internalSndId prevMsgHash
+                internalHash = C.sha256Hash agentMsgStr
+                currentE2EVersion = maxVersion e2eEncryptVRange
+            (mek, paddedLen, pqEnc) <- agentRatchetEncryptHeader db cData e2eEncAgentMsgLength pqEnc_ currentE2EVersion
+            withExceptT (SEAgentError . cryptoError) $ CR.rcCheckCanPad paddedLen agentMsgStr
+            let msgType = aMessageType aMessage
+                -- msgBody is empty, because snd_messages record is linked to snd_message_bodies
+                msgData = SndMsgData {internalId, internalSndId, internalTs, msgType, msgFlags, msgBody = "", pqEncryption = pqEnc, internalHash, prevMsgHash, sndMsgPrepData_ = Just SndMsgPrepData {encryptKey = mek, paddedLen, sndMsgBodyId}}
+            liftIO $ createSndMsg db connId msgData
+            liftIO $ createSndMsgDelivery db sq internalId
+            pure (req, internalId, pqEnc)
     handleInternal :: E.SomeException -> IO (Either AgentErrorType b)
     handleInternal = pure . Left . INTERNAL . show
 
-submitSentMsg :: AgentClient -> ((Either AgentErrorType (ConnData, NonEmpty SndQueue), Maybe PQEncryption, MsgFlags, ValueOrRef AMessage), InternalId, PQEncryption) -> AM' (Either AgentErrorType ((AgentMsgId, PQEncryption), Maybe ([SndQueue], AgentMsgId)))
-submitSentMsg c ((csqs_, _, _, _), InternalId msgId, pqSecr) = forM csqs_ $ \(cData, sq :| sqs) -> do
-  submitPendingMsg c sq
-  let sqs' = filter (isActiveSndQ cData) sqs
-  pure ((msgId, pqSecr), if null sqs' then Nothing else Just (sqs', msgId))
-
-storeSentMsg ::
-  DB.Connection ->
-  AgentConfig ->
-  IntMap (Maybe Int64, AMessage) ->
-  Either AgentErrorType (Either AgentErrorType (ConnData, NonEmpty SndQueue), Maybe PQEncryption, MsgFlags, ValueOrRef AMessage) ->
-  IO (IntMap (Maybe Int64, AMessage), Either AgentErrorType ((Either AgentErrorType (ConnData, NonEmpty SndQueue), Maybe PQEncryption, MsgFlags, ValueOrRef AMessage), InternalId, PQEncryption))
-storeSentMsg db cfg aMessageIds = \case
-  Left e -> pure (aMessageIds, Left e)
-  Right req@(csqs_, pqEnc_, msgFlags, mbr) -> case mbr of
-    VRValue i_ aMessage -> case i_ >>= (`IM.lookup` aMessageIds) of
-      Just _ -> pure (aMessageIds, Left $ INTERNAL "enqueueMessageB: storeSentMsg duplicate saved message body")
-      Nothing -> do
-        (mbId_, r) <- case csqs_ of
-          Left e -> pure (Nothing, Left e)
-          Right (cData, sq :| _) -> do
-            mbId <- createSndMsgBody db aMessage
-            (Just mbId,) <$> storeSentMsg_ cData sq mbId aMessage
-        let aMessageIds' = maybe id (`IM.insert` (mbId_, aMessage)) i_ aMessageIds
-        pure (aMessageIds', r)
-    VRRef i -> case csqs_ of
-      Left e -> pure $ (aMessageIds, Left e)
-      Right (cData, sq :| _) -> case IM.lookup i aMessageIds of
-        Just (Just mbId, aMessage) -> (aMessageIds,) <$> storeSentMsg_ cData sq mbId aMessage
-        Just (Nothing, aMessage) -> do
-          mbId <- createSndMsgBody db aMessage
-          let aMessageIds' = IM.insert i (Just mbId, aMessage) aMessageIds
-          (aMessageIds',) <$> storeSentMsg_ cData sq mbId aMessage
-        Nothing -> pure (aMessageIds, Left $ INTERNAL "enqueueMessageB: storeSentMsg missing saved message body id")
-    where
-      storeSentMsg_ cData@ConnData {connId} sq sndMsgBodyId aMessage = fmap (first storeError) $ runExceptT $ do
-        let AgentConfig {e2eEncryptVRange} = cfg
-        internalTs <- liftIO getCurrentTime
-        (internalId, internalSndId, prevMsgHash) <- ExceptT $ updateSndIds db connId
-        -- We need to do pre-flight encoding that is not stored in database
-        -- to calculate its hash and remember it on connection (createSndMsg -> updateSndMsgHash)
-        -- to enable next enqueue.
-        -- (As encoding is different per connection, we can't store shared body, so it's repeated on delivery)
-        let agentMsgStr = encodeAgentMsgStr aMessage internalSndId prevMsgHash
-            internalHash = C.sha256Hash agentMsgStr
-            currentE2EVersion = maxVersion e2eEncryptVRange
-        (mek, paddedLen, pqEnc) <- agentRatchetEncryptHeader db cData e2eEncAgentMsgLength pqEnc_ currentE2EVersion
-        withExceptT (SEAgentError . cryptoError) $ CR.rcCheckCanPad paddedLen agentMsgStr
-        let msgType = aMessageType aMessage
-            -- msgBody is empty, because snd_messages record is linked to snd_message_bodies
-            msgData = SndMsgData {internalId, internalSndId, internalTs, msgType, msgFlags, msgBody = "", pqEncryption = pqEnc, internalHash, prevMsgHash, sndMsgPrepData_ = Just SndMsgPrepData {encryptKey = mek, paddedLen, sndMsgBodyId}}
-        liftIO $ createSndMsg db connId msgData
-        liftIO $ createSndMsgDelivery db sq internalId
-        pure (req, internalId, pqEnc)
-
 encodeAgentMsgStr :: AMessage -> InternalSndId -> PrevSndMsgHash -> ByteString
 encodeAgentMsgStr aMessage internalSndId prevMsgHash = do
   let privHeader = APrivHeader (unSndId internalSndId) prevMsgHash
@@ -2890,18 +2865,15 @@ synchronizeRatchet' c connId pqSupport' force = withConnLock c connId "synchroni
     SomeConn _ (DuplexConnection cData@ConnData {pqSupport} rqs sqs)
       | ratchetSyncAllowed cData || force -> do
           -- check queues are not switching?
+          when (pqSupport' /= pqSupport) $ withStore' c $ \db -> setConnPQSupport db connId pqSupport'
           let cData' = cData {pqSupport = pqSupport'} :: ConnData
-          AgentConfig {e2eEncryptVRange, smpAgentVRange} <- asks config
+          AgentConfig {e2eEncryptVRange} <- asks config
           g <- asks random
           (pks, e2eParams) <- liftIO $ CR.generateRcvE2EParams g (maxVersion e2eEncryptVRange) pqSupport'
-          msgId <- withStore c $ \db -> runExceptT $ do
-            msgId <- storeRatchetKey db (L.head sqs) (maxVersion smpAgentVRange) e2eParams Nothing
-            liftIO $ do
-              when (pqSupport' /= pqSupport) $ setConnPQSupport db connId pqSupport'
-              setConnRatchetSync db connId RSStarted
-              setRatchetX3dhKeys db connId pks
-            pure msgId
-          lift $ enqueueRatchetKeyMsgs c cData' sqs msgId
+          enqueueRatchetKeyMsgs c cData' sqs e2eParams
+          withStore' c $ \db -> do
+            setConnRatchetSync db connId RSStarted
+            setRatchetX3dhKeys db connId pks
           let cData'' = cData' {ratchetSyncState = RSStarted} :: ConnData
               conn' = DuplexConnection cData'' rqs sqs
           connectionStats c conn'
@@ -3432,9 +3404,6 @@ subscriber c@AgentClient {msgQ, subQ} = run $ forever $ do
     run a = a `catchOwn` \e -> notify $ CRITICAL True $ "Agent subscriber stopped: " <> show e
     notify err = atomically $ writeTBQueue subQ ("", "", AEvt SAEConn $ ERR err)
 
-maxRatchetKeyHashes :: Int
-maxRatchetKeyHashes = 100
-
 cleanupManager :: AgentClient -> AM' ()
 cleanupManager c@AgentClient {subQ} = do
   AgentConfig {initialCleanupDelay, cleanupInterval = int, storedMsgDataTTL = ttl, cleanupBatchSize = limit} <-
@@ -3444,7 +3413,7 @@ cleanupManager c@AgentClient {subQ} = do
     run ERR deleteConns
     run ERR $ withStore' c $ \db -> deleteRcvMsgHashesExpired db ttl limit
     run ERR $ withStore' c $ \db -> deleteSndMsgsExpired db ttl limit
-    run ERR $ withStore' c $ \db -> deleteRatchetKeyHashesExpired db ttl maxRatchetKeyHashes
+    run ERR $ withStore' c $ \db -> deleteRatchetKeyHashesExpired db ttl limit
     run ERR $ withStore' c (`deleteExpiredNtfTokensToDelete` ttl)
     run RFERR deleteRcvFilesExpired
     run RFERR deleteRcvFilesDeleted
@@ -3641,9 +3610,9 @@ processSMPTransmissions c@AgentClient {subQ} (tSess@(userId, srv, _), THandlePar
                       _ -> prohibited "handshake: incorrect state" >> ack
                   (Just e2eDh, Nothing) -> do
                     decryptClientMessage e2eDh clientMsg >>= \case
-                      (SMP.PHEmpty, AgentRatchetKey {agentVersion, e2eEncryption, info}) -> do
+                      (SMP.PHEmpty, AgentRatchetKey {agentVersion, e2eEncryption}) -> do
                         conn' <- updateConnVersion conn cData agentVersion
-                        qDuplex conn' "AgentRatchetKey" $ \a -> newRatchetKey e2eEncryption info a >> ack
+                        qDuplex conn' "AgentRatchetKey" $ \a -> newRatchetKey e2eEncryption a >> ack
                       (SMP.PHEmpty, AgentMsgEnvelope {agentVersion, encAgentMessage}) -> do
                         conn' <- updateConnVersion conn cData agentVersion
                         -- primary queue is set as Active in helloMsg, below is to set additional queues Active
@@ -3686,7 +3655,7 @@ processSMPTransmissions c@AgentClient {subQ} (tSess@(userId, srv, _), THandlePar
                               qDuplexAckDel conn'' name a = qDuplex conn'' name a >> ackDel msgId
                               resetRatchetSync :: AM (Connection c)
                               resetRatchetSync
-                                | rss `notElem` ([RSOk, RSStarted] :: [RatchetSyncState]) = ifM ((RSStarted ==) <$> getRatchetSyncState) (pure conn') $ do
+                                | rss `notElem` ([RSOk, RSStarted] :: [RatchetSyncState]) = do
                                     let cData'' = (toConnData conn') {ratchetSyncState = RSOk} :: ConnData
                                         conn'' = updateConnection cData'' conn'
                                     cStats <- connectionStats c conn''
@@ -3727,7 +3696,7 @@ processSMPTransmissions c@AgentClient {subQ} (tSess@(userId, srv, _), THandlePar
                               notifySync :: AM ()
                               notifySync = qDuplex conn' "AGENT A_CRYPTO error" $ \connDuplex -> do
                                 let rss' = cryptoErrToSyncState e
-                                whenM ((`elem` ([RSOk, RSAllowed, RSRequired] :: [RatchetSyncState])) <$> getRatchetSyncState) $ do
+                                when (rss `elem` ([RSOk, RSAllowed, RSRequired] :: [RatchetSyncState])) $ do
                                   let cData'' = (toConnData conn') {ratchetSyncState = rss'} :: ConnData
                                       conn'' = updateConnection cData'' connDuplex
                                   cStats <- connectionStats c conn''
@@ -3823,9 +3792,6 @@ processSMPTransmissions c@AgentClient {subQ} (tSess@(userId, srv, _), THandlePar
           enqueueCmd :: InternalCommand -> AM ()
           enqueueCmd = enqueueCommand c "" connId (Just srv) . AInternalCommand
 
-          getRatchetSyncState :: AM RatchetSyncState
-          getRatchetSyncState = withStore c (`getConnRatchetSync` connId)
-
           unexpected :: BrokerMsg -> AM ()
           unexpected r = do
             logServer "<--" c srv rId $ "unexpected: " <> bshow r
@@ -4194,47 +4160,42 @@ processSMPTransmissions c@AgentClient {subQ} (tSess@(userId, srv, _), THandlePar
             DuplexConnection {} -> action conn'
             _ -> qError $ name <> ": message must be sent to duplex connection"
 
-          newRatchetKey :: CR.RcvE2ERatchetParams 'C.X448 -> ByteString -> Connection 'CDuplex -> AM ()
-          newRatchetKey e2eOtherPartyParams@(CR.E2ERatchetParams e2eVersion k1Rcv k2Rcv _) info conn'@(DuplexConnection cData'@ConnData {lastExternalSndId, pqSupport} _ sqs) =
+          newRatchetKey :: CR.RcvE2ERatchetParams 'C.X448 -> Connection 'CDuplex -> AM ()
+          newRatchetKey e2eOtherPartyParams@(CR.E2ERatchetParams e2eVersion k1Rcv k2Rcv _) conn'@(DuplexConnection cData'@ConnData {lastExternalSndId, pqSupport} _ sqs) =
             unlessM ratchetExists $ do
               AgentConfig {e2eEncryptVRange} <- asks config
               unless (e2eVersion `isCompatible` e2eEncryptVRange) (throwE $ AGENT A_VERSION)
-              keys_ <- getSendRatchetKeys
+              keys <- getSendRatchetKeys
               let rcVs = CR.RatchetVersions {current = e2eVersion, maxSupported = maxVersion e2eEncryptVRange}
-              case keys_ of
-                Just (keys, replyKey_) -> initRatchet rcVs keys replyKey_ >> notifyAgreed
-                Nothing -> withStore' c $ \db -> addProcessedRatchetKeyHash db connId rkHashRcv
+              initRatchet rcVs keys
+              notifyAgreed
             where
               rkHashRcv = rkHash k1Rcv k2Rcv
               rkHash k1 k2 = C.sha256Hash $ C.pubKeyBytes k1 <> C.pubKeyBytes k2
-              answeredKeyHash_ = case smpDecode info of
-                Right (AgentRatchetInfo RatchetInfo {answeredKeyHash}) -> answeredKeyHash
-                _ -> Nothing
               ratchetExists :: AM Bool
               ratchetExists = withStore' c $ \db -> do
                 exists <- checkRatchetKeyHashExists db connId rkHashRcv
+                unless exists $ addProcessedRatchetKeyHash db connId rkHashRcv
                 pure exists
-              getSendRatchetKeys :: AM (Maybe (CR.RcvE2EPrivRatchetParams 'C.X448, Maybe (CR.RcvE2ERatchetParams 'C.X448)))
-              getSendRatchetKeys = getRatchetSyncState >>= \rss' -> case (rss', answeredKeyHash_) of
-                (RSStarted, Nothing) -> Just . (,Nothing) <$> withStore c (`getRatchetX3dhKeys` connId) -- initiating client
-                (RSStarted, Just h) -> fmap (,Nothing) . answeredKeys h <$> withStore c (`getRatchetX3dhKeys` connId)
-                (_, Nothing) -> Just <$> sendReplyKey -- receiving client
-                (RSAgreed, Just _) -> do
-                  withStore' c $ \db -> addProcessedRatchetKeyHash db connId rkHashRcv >> setConnRatchetSync db connId RSRequired
+              getSendRatchetKeys :: AM (CR.RcvE2EPrivRatchetParams 'C.X448)
+              getSendRatchetKeys = case rss of
+                RSOk -> sendReplyKey -- receiving client
+                RSAllowed -> sendReplyKey
+                RSRequired -> sendReplyKey
+                RSStarted -> withStore c (`getRatchetX3dhKeys` connId) -- initiating client
+                RSAgreed -> do
+                  withStore' c $ \db -> setConnRatchetSync db connId RSRequired
                   notifyRatchetSyncError
                   -- can communicate for other client to reset to RSRequired
                   -- - need to add new AgentMsgEnvelope, AgentMessage, AgentMessageType
                   -- - need to deduplicate on receiving side
                   throwE $ AGENT (A_CRYPTO RATCHET_SYNC)
-                (_, Just _) -> pure Nothing
                 where
-                  answeredKeys h keys@(pk1, pk2, _)
-                    | rkHash (C.publicKey pk1) (C.publicKey pk2) == h = Just keys
-                    | otherwise = Nothing
                   sendReplyKey = do
                     g <- asks random
                     (pks, e2eParams) <- liftIO $ CR.generateRcvE2EParams g e2eVersion pqSupport
-                    pure (pks, Just e2eParams)
+                    enqueueRatchetKeyMsgs c cData' sqs e2eParams
+                    pure pks
                   notifyRatchetSyncError = do
                     let cData'' = cData' {ratchetSyncState = RSRequired} :: ConnData
                         conn'' = updateConnection cData'' conn'
@@ -4246,33 +4207,23 @@ processSMPTransmissions c@AgentClient {subQ} (tSess@(userId, srv, _), THandlePar
                     conn'' = updateConnection cData'' conn'
                 cStats <- connectionStats c conn''
                 notify $ RSYNC RSAgreed Nothing cStats
-              recreateRatchet :: Maybe (CR.RcvE2ERatchetParams 'C.X448) -> Maybe AMessage -> CR.Ratchet 'C.X448 -> AM ()
-              recreateRatchet replyKey_ eready_ rc = do
-                cfg@AgentConfig {smpAgentVRange} <- asks config
-                (msgId_, r_) <- withStore c $ \db -> runExceptT $ do
-                  msgId_ <- forM replyKey_ $ \e2eParams -> storeRatchetKey db (L.head sqs) (maxVersion smpAgentVRange) e2eParams (Just rkHashRcv)
-                  liftIO $ do
-                    addProcessedRatchetKeyHash db connId rkHashRcv
-                    setConnRatchetSync db connId RSAgreed
-                    deleteRatchet db connId
-                    createRatchet db connId rc
-                  r_ <- forM eready_ $ \msg -> liftIO $ storeSentMsg db cfg IM.empty (Right (Right (cData', sqs), Nothing, SMP.MsgFlags {notification = True}, vrValue msg)) >>= either E.throwIO pure . snd
-                  pure (msgId_, r_)
-                forM_ msgId_ $ lift . enqueueRatchetKeyMsgs c cData' sqs
-                forM_ r_ $ \r -> lift $ do
-                  r' <- submitSentMsg c r
-                  enqueueSavedMessageB c $ mapMaybe snd $ rights [r']
+              recreateRatchet :: CR.Ratchet 'C.X448 -> AM ()
+              recreateRatchet rc = withStore' c $ \db -> do
+                setConnRatchetSync db connId RSAgreed
+                deleteRatchet db connId
+                createRatchet db connId rc
               -- compare public keys `k1` in AgentRatchetKey messages sent by self and other party
               -- to determine ratchet initilization ordering
-              initRatchet :: CR.RatchetVersions -> CR.RcvE2EPrivRatchetParams 'C.X448 -> Maybe (CR.RcvE2ERatchetParams 'C.X448) -> AM ()
-              initRatchet rcVs (pk1, pk2, pKem) replyKey_
+              initRatchet :: CR.RatchetVersions -> CR.RcvE2EPrivRatchetParams 'C.X448 -> AM ()
+              initRatchet rcVs (pk1, pk2, pKem)
                 | rkHash (C.publicKey pk1) (C.publicKey pk2) <= rkHashRcv = do
                     rcParams <- liftError cryptoError $ CR.pqX3dhRcv (pk1, pk2, pKem) e2eOtherPartyParams
-                    recreateRatchet replyKey_ Nothing $ CR.initRcvRatchet rcVs pk2 rcParams pqSupport
+                    recreateRatchet $ CR.initRcvRatchet rcVs pk2 rcParams pqSupport
                 | otherwise = do
                     (_, rcDHRs) <- atomically . C.generateKeyPair =<< asks random
                     rcParams <- liftEitherWith cryptoError $ CR.pqX3dhSnd (pk1, pk2, CR.APRKP CR.SRKSProposed <$> pKem) e2eOtherPartyParams
-                    recreateRatchet replyKey_ (Just $ EREADY lastExternalSndId) $ CR.initSndRatchet rcVs k2Rcv rcDHRs rcParams
+                    recreateRatchet $ CR.initSndRatchet rcVs k2Rcv rcDHRs rcParams
+                    void . enqueueMessages' c cData' sqs SMP.MsgFlags {notification = True} $ EREADY lastExternalSndId
 
           checkMsgIntegrity :: PrevExternalSndId -> ExternalSndId -> PrevRcvMsgHash -> ByteString -> MsgIntegrity
           checkMsgIntegrity prevExtSndId extSndId internalPrevMsgHash receivedPrevMsgHash
@@ -4385,25 +4336,32 @@ storeConfirmation c cData@ConnData {connId, pqSupport, connAgentVersion = v} sq
     liftIO $ createSndMsg db connId msgData
     liftIO $ createSndMsgDelivery db sq internalId
 
-enqueueRatchetKeyMsgs :: AgentClient -> ConnData -> NonEmpty SndQueue -> InternalId -> AM' ()
-enqueueRatchetKeyMsgs c cData (sq :| sqs) (InternalId msgId) = do
-  submitPendingMsg c sq
-  mapM_ (enqueueSavedMessage c msgId) $ filter (isActiveSndQ cData) sqs
+enqueueRatchetKeyMsgs :: AgentClient -> ConnData -> NonEmpty SndQueue -> CR.RcvE2ERatchetParams 'C.X448 -> AM ()
+enqueueRatchetKeyMsgs c cData (sq :| sqs) e2eEncryption = do
+  msgId <- enqueueRatchetKey c sq e2eEncryption
+  mapM_ (lift . enqueueSavedMessage c msgId) $ filter (isActiveSndQ cData) sqs
 
-storeRatchetKey :: DB.Connection -> SndQueue -> VersionSMPA -> CR.RcvE2ERatchetParams 'C.X448 -> Maybe ByteString -> ExceptT StoreError IO InternalId
-storeRatchetKey db sq@SndQueue {connId} agentVersion e2eEncryption answeredKeyHash_ = do
-  internalTs <- liftIO getCurrentTime
-  (internalId, internalSndId, prevMsgHash) <- ExceptT $ updateSndIds db connId
-  let agentMsg = AgentRatchetInfo RatchetInfo {answeredKeyHash = answeredKeyHash_}
-      agentMsgStr = smpEncode agentMsg
-      internalHash = C.sha256Hash agentMsgStr
-  let msgBody = smpEncode $ AgentRatchetKey {agentVersion, e2eEncryption, info = agentMsgStr}
-      msgType = agentMessageType agentMsg
-      -- this message is e2e encrypted with queue key, not with double ratchet
-      msgData = SndMsgData {internalId, internalSndId, internalTs, msgType, msgBody, pqEncryption = PQEncOff, msgFlags = SMP.MsgFlags {notification = True}, internalHash, prevMsgHash, sndMsgPrepData_ = Nothing}
-  liftIO $ createSndMsg db connId msgData
-  liftIO $ createSndMsgDelivery db sq internalId
-  pure internalId
+enqueueRatchetKey :: AgentClient -> SndQueue -> CR.RcvE2ERatchetParams 'C.X448 -> AM AgentMsgId
+enqueueRatchetKey c sq@SndQueue {connId} e2eEncryption = do
+  aVRange <- asks $ smpAgentVRange . config
+  msgId <- storeRatchetKey $ maxVersion aVRange
+  lift $ submitPendingMsg c sq
+  pure $ unId msgId
+  where
+    storeRatchetKey :: VersionSMPA -> AM InternalId
+    storeRatchetKey agentVersion = withStore c $ \db -> runExceptT $ do
+      internalTs <- liftIO getCurrentTime
+      (internalId, internalSndId, prevMsgHash) <- ExceptT $ updateSndIds db connId
+      let agentMsg = AgentRatchetInfo ""
+          agentMsgStr = smpEncode agentMsg
+          internalHash = C.sha256Hash agentMsgStr
+      let msgBody = smpEncode $ AgentRatchetKey {agentVersion, e2eEncryption, info = agentMsgStr}
+          msgType = agentMessageType agentMsg
+          -- this message is e2e encrypted with queue key, not with double ratchet
+          msgData = SndMsgData {internalId, internalSndId, internalTs, msgType, msgBody, pqEncryption = PQEncOff, msgFlags = SMP.MsgFlags {notification = True}, internalHash, prevMsgHash, sndMsgPrepData_ = Nothing}
+      liftIO $ createSndMsg db connId msgData
+      liftIO $ createSndMsgDelivery db sq internalId
+      pure internalId
 
 -- encoded AgentMessage -> encoded EncAgentMessage
 agentRatchetEncrypt :: DB.Connection -> ConnData -> ByteString -> (PQSupport -> Int) -> Maybe PQEncryption -> CR.VersionE2E -> ExceptT StoreError IO (ByteString, PQEncryption)
@@ -4428,11 +4386,10 @@ agentRatchetDecrypt g db connId encAgentMsg = do
 
 agentRatchetDecrypt' :: TVar ChaChaDRG -> DB.Connection -> ConnId -> CR.RatchetX448 -> ByteString -> ExceptT StoreError IO (ByteString, PQEncryption)
 agentRatchetDecrypt' g db connId rc encAgentMsg = do
-  skipped <- liftIO $ getSkippedMsgKeys db connId CR.maxSkippedMsgKeys
+  skipped <- liftIO $ getSkippedMsgKeys db connId
   (agentMsgBody_, rc', skippedDiff) <- withExceptT (SEAgentError . cryptoError) $ CR.rcDecrypt g rc skipped encAgentMsg
-  agentMsgBody <- liftEither $ first (SEAgentError . cryptoError) agentMsgBody_
   liftIO $ updateRatchet db connId rc' skippedDiff
-  pure (agentMsgBody, CR.rcRcvKEM rc')
+  liftEither $ bimap (SEAgentError . cryptoError) (,CR.rcRcvKEM rc') agentMsgBody_
 
 newSndQueue :: UserId -> ConnId -> Compatible SMPQueueInfo -> Maybe (C.APrivateAuthKey) -> AM' (NewSndQueue, C.PublicKeyX25519)
 newSndQueue userId connId (Compatible (SMPQueueInfo smpClientVersion SMPQueueAddress {smpServer, senderId, queueMode, dhPublicKey = rcvE2ePubDhKey})) sndKey_ = do

src/Simplex/Messaging/Agent/Client.hs

@@ -21,7 +21,6 @@
 {-# LANGUAGE TupleSections #-}
 {-# LANGUAGE TypeApplications #-}
 {-# LANGUAGE TypeFamilyDependencies #-}
-{-# LANGUAGE TypeOperators #-}
 
 module Simplex.Messaging.Agent.Client
   ( AgentClient (..),
@@ -149,7 +148,6 @@ module Simplex.Messaging.Agent.Client
     UserNetworkType (..),
     getFastNetworkConfig,
     waitForUserNetwork,
-    closeNetworkClients,
     isNetworkOnline,
     isOnline,
     throwWhenInactive,
@@ -314,7 +312,7 @@ import Simplex.Messaging.Session
 import Simplex.Messaging.SystemTime
 import Simplex.Messaging.TMap (TMap)
 import qualified Simplex.Messaging.TMap as TM
-import Simplex.Messaging.Transport (HandshakeError (..), SMPServiceRole (..), SMPVersion, ServiceCredentials (..), SessionId, THClientService' (..), THandleAuth (..), THandleParams (sessionId, thAuth, thVersion, serverInfo), TransportError (..), newNtfCredsSMPVersion)
+import Simplex.Messaging.Transport (HandshakeError (..), SMPServiceRole (..), SMPVersion, ServiceCredentials (..), SessionId, THClientService' (..), THandleAuth (..), THandleParams (sessionId, thAuth, thVersion, serverInfo), TransportError (..), TransportPeer (..), shortLinksSMPVersion, newNtfCredsSMPVersion)
 import Simplex.Messaging.Transport.Client (TransportHost (..))
 import Simplex.Messaging.Transport.Credentials
 import Simplex.Messaging.Util
@@ -365,8 +363,6 @@ data AgentClient = AgentClient
     presetServers :: [SMPServer],
     userNetworkInfo :: TVar UserNetworkInfo,
     userNetworkUpdated :: TVar (Maybe UTCTime),
-    -- incremented for each accepted network info, to identify the most recent one
-    networkEventSeq :: TVar Int,
     subscrConns :: TVar (Set ConnId),
     currentSubs :: TSessionSubs,
     removedSubs :: TMap (UserId, SMPServer) (TMap SMP.RecipientId SMPClientError),
@@ -539,7 +535,6 @@ newAgentClient clientId InitialAgentServers {smp, ntf, xftp, entitlements, netCf
   useNetworkConfig <- newTVarIO (slowNetworkConfig netCfg, netCfg)
   userNetworkInfo <- newTVarIO $ UserNetworkInfo UNOther True
   userNetworkUpdated <- newTVarIO Nothing
-  networkEventSeq <- newTVarIO 0
   subscrConns <- newTVarIO S.empty
   currentSubs <- SS.emptyIO
   removedSubs <- TM.emptyIO
@@ -584,7 +579,6 @@ newAgentClient clientId InitialAgentServers {smp, ntf, xftp, entitlements, netCf
         presetServers,
         userNetworkInfo,
         userNetworkUpdated,
-        networkEventSeq,
         subscrConns,
         currentSubs,
         removedSubs,
@@ -773,12 +767,8 @@ smpConnectClient c@AgentClient {smpClients, msgQ, proxySessTs, presetDomains} nm
       smp <- liftError (protocolClientError SMP $ B.unpack $ strEncode srv) $ do
         ts <- readTVarIO proxySessTs
         ExceptT $ getProtocolClient g nm tSess cfg' presetDomains (Just msgQ) ts $ smpClientDisconnected c tSess env v' prs
-      -- the client removed from the map while it was connecting (see newProtocolClient) must not
-      -- replace the session or the service of the client that is current now
-      current <- atomically $ do
-        cur <- currentSessVar v' tSess smpClients
-        cur <$ when cur (SS.setSessionId tSess (sessionId $ thParams smp) $ currentSubs c)
-      when current $ updateClientService service smp
+      atomically $ SS.setSessionId tSess (sessionId $ thParams smp) $ currentSubs c
+      updateClientService service smp
       pure SMPConnectedClient {connectedClient = smp, proxiedRelays = prs}
     updateClientService service smp = case (service, smpClientServiceId smp) of
       (Just (_, serviceId_), Just serviceId) -> withStore' c $ \db -> do
@@ -964,18 +954,8 @@ newProtocolClient ::
 newProtocolClient c tSess@(userId, srv, entityId_) clients connectClient v =
   tryAllErrors (connectClient v) >>= \case
     Right client -> do
-      -- the client removed from the map while it was connecting, e.g. when the network changed, must
-      -- not be used - the requests made on it would wait for the responses that will not arrive; it is
-      -- published and rejected in one transaction, so that the caller always receives the one in the map
-      let e = BROKER (B.unpack $ strEncode srv) (NETWORK NEFailedError)
-      current <- atomically $ do
-        cur <- currentSessVar v tSess clients
-        cur <$ putTMVar (sessionVar v) (if cur then Right client else Left (e, Nothing))
-      unless current $ do
-        -- closed in another thread, as closing an XFTP client waits for its thread to terminate
-        void $ liftIO $ forkIO $ closeProtocolServerClient (protocolClient client) `catchAll_` pure ()
-        throwE e
       logInfo . decodeUtf8 $ "Agent connected to " <> showServer srv <> " (user " <> bshow userId <> maybe "" (" for entity " <>) entityId_ <> ")"
+      atomically $ putTMVar (sessionVar v) (Right client)
       liftIO $ nonBlockingWriteTBQueue (subQ c) ("", "", AEvt SAENone $ hostEvent CONNECT client)
       pure client
     Left e -> do
@@ -1069,32 +1049,6 @@ reconnectServerClients :: ProtocolServerClient v err msg => AgentClient -> (Agen
 reconnectServerClients c clientsSel =
   readTVarIO (clientsSel c) >>= mapM_ (forkIO . closeClient_ c)
 
--- The pending requests of the clients that are closed fail before this function returns, so that
--- the workers that resume do not wait for the responses that will not arrive; the requests of
--- a client that did not terminate within the timeout are left to time out as before.
-closeNetworkClients :: (ProtocolServerClient v err msg, ProtoClient msg ~ ProtocolClient v err msg) => AgentClient -> (AgentClient -> TMap (TransportSession msg) (ClientVar msg)) -> IO ()
-closeNetworkClients c clientsSel = do
-  closed <- readTVarIO (clientsSel c) >>= fmap catMaybes . mapM closeNetworkClient . M.toList
-  void $ 1000000 `timeout` atomically (mapM_ (\pc -> whenM (clientConnected pc) retry) closed)
-  -- the requests are failed after the client threads terminate, so that the responses that arrive
-  -- before that are processed as usual rather than as the responses to the failed requests
-  forM_ closed $ \pc -> unlessM (atomically $ clientConnected pc) $ failPendingRequests pc
-  where
-    closeNetworkClient (tSess, v) =
-      atomically (tryReadTMVar (sessionVar v) >>= \r -> r <$ removeUnconnected r) >>= \case
-        Just (Right client) -> do
-          let pc = protocolClient client
-          Just pc <$ forkIO (closeProtocolServerClient pc `catchAll_` pure ())
-        _ -> pure Nothing
-      where
-        -- the client that failed to connect is removed so that the resumed workers do not get its cached
-        -- error, and the one that is connecting - so that they create a new client instead of waiting for
-        -- the connection made via the previous network; it is read and removed in one transaction, so that
-        -- it cannot publish itself in between - newProtocolClient then rejects and closes it
-        removeUnconnected = \case
-          Just (Right _) -> pure ()
-          _ -> removeSessVar v tSess (clientsSel c)
-
 reconnectSMPServer :: AgentClient -> UserId -> SMPServer -> IO ()
 reconnectSMPServer c userId srv = do
   cs <- readTVarIO $ smpClients c
@@ -1307,12 +1261,9 @@ sendOrProxySMPCommand c nm userId destSrv@ProtocolServer {host = destHosts} conn
           Left e -> throwE e
 
 ipAddressProtected :: NetworkConfig -> ProtocolServer p -> Bool
-ipAddressProtected NetworkConfig {socksProxy, socksMode, hostMode} (ProtocolServer _ hosts _ _)
-  | isJust socksProxy = socksMode == SMAlways || if hostMode == HMPublic then allOnion else anyOnion
-  | otherwise = hostMode == HMOnion && anyOnion
+ipAddressProtected NetworkConfig {socksProxy, hostMode} (ProtocolServer _ hosts _ _) = do
+  isJust socksProxy || (hostMode == HMOnion && any isOnionHost hosts)
   where
-    anyOnion = any isOnionHost hosts
-    allOnion = all isOnionHost hosts
     isOnionHost = \case THOnionHost _ -> True; _ -> False
 
 withNtfClient :: AgentClient -> NetworkRequestMode -> NtfServer -> EntityId -> ByteString -> (NtfClient -> ExceptT NtfClientError IO a) -> AM a
@@ -1545,7 +1496,7 @@ newRcvQueue_ c nm userId connId (ProtoServerWithAuth srv auth) vRange cqrd enabl
   let sessServiceId = (\THClientService {serviceId = sId} -> sId) <$> (clientService =<< thAuth thParams')
   when (isJust serviceId && serviceId /= sessServiceId) $ logError "incorrect service ID in NEW response"
   liftIO . logServer "<--" c srv NoEntity $ B.unwords ["IDS", logSecret rcvId, logSecret sndId]
-  shortLink <- mkShortLinkCreds qik
+  shortLink <- mkShortLinkCreds thParams' qik
   let rq =
         RcvQueue
           { userId,
@@ -1586,8 +1537,8 @@ newRcvQueue_ c nm userId connId (ProtoServerWithAuth srv auth) vRange cqrd enabl
       (Just ((ntfPublicKey, ntfPrivateKey), dhpk), Just (ServerNtfCreds notifierId dhk')) ->
         Just ClientNtfCreds {ntfPublicKey, ntfPrivateKey, notifierId, rcvNtfDhSecret = C.dh' dhk' dhpk}
       _ -> Nothing
-    mkShortLinkCreds :: QueueIdsKeys -> AM (Maybe ShortLinkCreds)
-    mkShortLinkCreds QIK {sndId, queueMode, linkId} = case (cqrd, queueMode) of
+    mkShortLinkCreds :: THandleParams SMPVersion 'TClient -> QueueIdsKeys -> AM (Maybe ShortLinkCreds)
+    mkShortLinkCreds thParams' QIK {sndId, queueMode, linkId} = case (cqrd, queueMode) of
       (CQRMessaging ld, Just QMMessaging) ->
         withLinkData ld $ \lnkId CQRData {linkKey, privSigKey, srvReq = (sndId', d)} ->
           if sndId == sndId'
@@ -1601,9 +1552,11 @@ newRcvQueue_ c nm userId connId (ProtoServerWithAuth srv auth) vRange cqrd enabl
       (_, Nothing) -> newErr "unexpected link ID"
       _ -> newErr "unexpected queue mode"
       where
+        v = thVersion thParams'
         withLinkData :: Maybe d -> (SMP.LinkId -> d -> AM (Maybe ShortLinkCreds)) -> AM (Maybe ShortLinkCreds)
         withLinkData ld_ mkLink = case (ld_, linkId) of
           (Just ld, Just lnkId) -> mkLink lnkId ld
+          (Just _, Nothing) | v < shortLinksSMPVersion -> pure Nothing
           (Nothing, Nothing) -> pure Nothing
           _ -> newErr "unexpected or absent link ID"
         newErr :: String -> AM (Maybe ShortLinkCreds)

src/Simplex/Messaging/Agent/Protocol.hs

@@ -79,7 +79,6 @@ module Simplex.Messaging.Agent.Protocol
     SMPConfirmation (..),
     AgentMsgEnvelope (..),
     AgentMessage (..),
-    RatchetInfo (..),
     RequestSignature (..),
     AgentMessageType (..),
     APrivHeader (..),
@@ -929,7 +928,7 @@ data AgentMessage
   | -- AgentConnInfoReply is used by accepting party in duplexHandshake mode (v2), allowing to include reply queue(s) in the initial confirmation.
     -- It made removed REPLY message unnecessary.
     AgentConnInfoReply (NonEmpty SMPQueueInfo) ConnInfo
-  | AgentRatchetInfo RatchetInfo
+  | AgentRatchetInfo ByteString
   | AgentMessage APrivHeader AMessage
   | AgentServiceRequest (NonEmpty SMPQueueInfo) (Maybe RequestSignature) MsgBody
   | AgentServiceResponse MsgBody
@@ -940,7 +939,7 @@ instance Encoding AgentMessage where
   smpEncode = \case
     AgentConnInfo cInfo -> smpEncode ('I', Tail cInfo)
     AgentConnInfoReply smpQueues cInfo -> smpEncode ('D', smpQueues, Tail cInfo) -- 'D' stands for "duplex"
-    AgentRatchetInfo info -> smpEncode ('R', info)
+    AgentRatchetInfo info -> smpEncode ('R', Tail info)
     AgentMessage hdr aMsg -> smpEncode ('M', hdr, aMsg)
     AgentServiceRequest qs sig_ body -> smpEncode ('A', qs, sig_, Tail body)
     AgentServiceResponse body -> smpEncode ('P', Tail body)
@@ -949,23 +948,13 @@ instance Encoding AgentMessage where
     smpP >>= \case
       'I' -> AgentConnInfo . unTail <$> smpP
       'D' -> AgentConnInfoReply <$> smpP <*> (unTail <$> smpP)
-      'R' -> AgentRatchetInfo <$> smpP
+      'R' -> AgentRatchetInfo . unTail <$> smpP
       'M' -> AgentMessage <$> smpP <*> smpP
       'A' -> AgentServiceRequest <$> smpP <*> smpP <*> (unTail <$> smpP)
       'P' -> AgentServiceResponse . unTail <$> smpP
       'J' -> AgentRejection . unTail <$> smpP
       _ -> fail "bad AgentMessage"
 
-data RatchetInfo = RatchetInfo {answeredKeyHash :: Maybe ByteString}
-  deriving (Eq, Show)
-
-instance Encoding RatchetInfo where
-  smpEncode RatchetInfo {answeredKeyHash} = smpEncode answeredKeyHash
-  smpP = do
-    answeredKeyHash <- smpP <|> pure Nothing
-    _ <- A.takeByteString
-    pure RatchetInfo {answeredKeyHash}
-
 -- internal type for storing message type in the database
 data AgentMessageType
   = AM_CONN_INFO

src/Simplex/Messaging/Agent/Store/AgentStore.hs

@@ -76,7 +76,6 @@ module Simplex.Messaging.Agent.Store.AgentStore
     getExpiredServiceConns,
     deleteExpiredServiceRequests,
     getDeletedWaitingDeliveryConnIds,
-    getConnRatchetSync,
     setConnRatchetSync,
     addProcessedRatchetKeyHash,
     checkRatchetKeyHashExists,
@@ -1595,16 +1594,12 @@ getRatchet_ q db connId =
   where
     ratchet = maybe (Left SERatchetNotFound) Right . fromOnly
 
-getSkippedMsgKeys :: DB.Connection -> ConnId -> Int -> IO SkippedMsgKeys
-getSkippedMsgKeys db connId maxKeys = do
-  (keys, oldKeys) <- splitAt maxKeys <$> DB.query db "SELECT skipped_message_id, header_key, msg_n, msg_key FROM skipped_messages WHERE conn_id = ? ORDER BY skipped_message_id DESC LIMIT ?" (connId, maxKeys + 1)
-  case oldKeys of
-    (skippedMsgId :: Int64, _, _, _) : _ -> DB.execute db "DELETE FROM skipped_messages WHERE conn_id = ? AND skipped_message_id <= ?" (connId, skippedMsgId)
-    [] -> pure ()
-  pure $ skipped keys
+getSkippedMsgKeys :: DB.Connection -> ConnId -> IO SkippedMsgKeys
+getSkippedMsgKeys db connId =
+  skipped <$> DB.query db "SELECT header_key, msg_n, msg_key FROM skipped_messages WHERE conn_id = ?" (Only connId)
   where
     skipped = foldl' addSkippedKey M.empty
-    addSkippedKey smks (_, hk, msgN, mk) = M.alter (Just . addMsgKey) hk smks
+    addSkippedKey smks (hk, msgN, mk) = M.alter (Just . addMsgKey) hk smks
       where
         addMsgKey = maybe (M.singleton msgN mk) (M.insert msgN mk)
 
@@ -2798,11 +2793,6 @@ getDeletedWaitingDeliveryConnIds :: DB.Connection -> IO [ConnId]
 getDeletedWaitingDeliveryConnIds db =
   map fromOnly <$> DB.query_ db "SELECT conn_id FROM connections WHERE deleted_at_wait_delivery IS NOT NULL"
 
-getConnRatchetSync :: DB.Connection -> ConnId -> IO (Either StoreError RatchetSyncState)
-getConnRatchetSync db connId =
-  firstRow fromOnly SEConnNotFound $
-    DB.query db "SELECT ratchet_sync_state FROM connections WHERE conn_id = ?" (Only connId)
-
 setConnRatchetSync :: DB.Connection -> ConnId -> RatchetSyncState -> IO ()
 setConnRatchetSync db connId ratchetSyncState =
   DB.execute db "UPDATE connections SET ratchet_sync_state = ? WHERE conn_id = ?" (ratchetSyncState, connId)
@@ -2824,35 +2814,21 @@ checkRatchetKeyHashExists db connId hash =
       (connId, Binary hash)
 
 deleteRatchetKeyHashesExpired :: DB.Connection -> NominalDiffTime -> Int -> IO ()
-deleteRatchetKeyHashesExpired db ttl maxConnHashes = do
+deleteRatchetKeyHashesExpired db ttl limit = do
   cutoffTs <- addUTCTime (-ttl) <$> getCurrentTime
-#if defined(dbPostgres)
   DB.execute
     db
-    ("DELETE FROM processed_ratchet_key_hashes h USING (" <> maxExcessIdsQuery <> ") e WHERE h.conn_id = e.conn_id AND h.processed_ratchet_key_hash_id <= e.max_excess_id AND h.created_at < ?")
-    (maxConnHashes, maxConnHashes, cutoffTs)
-#else
-  maxExcessIds <- DB.query db maxExcessIdsQuery (maxConnHashes, maxConnHashes)
-  DB.executeMany
-    db
-    "DELETE FROM processed_ratchet_key_hashes WHERE conn_id = ? AND processed_ratchet_key_hash_id <= ? AND created_at < ?"
-    (map (\(connId :: ConnId, maxExcessId :: Int64) -> (connId, maxExcessId, cutoffTs)) maxExcessIds)
-#endif
-  where
-    maxExcessIdsQuery :: Query
-    maxExcessIdsQuery =
-      [sql|
-        SELECT conn_id, (
-          SELECT processed_ratchet_key_hash_id
-          FROM processed_ratchet_key_hashes
-          WHERE conn_id = c.conn_id
-          ORDER BY processed_ratchet_key_hash_id DESC
-          LIMIT 1 OFFSET ?
-        ) AS max_excess_id
-        FROM processed_ratchet_key_hashes c
-        GROUP BY conn_id
-        HAVING COUNT(*) > ?
-      |]
+    [sql|
+      DELETE FROM processed_ratchet_key_hashes
+      WHERE processed_ratchet_key_hash_id IN (
+        SELECT processed_ratchet_key_hash_id
+        FROM processed_ratchet_key_hashes
+        WHERE created_at < ?
+        ORDER BY created_at ASC
+        LIMIT ?
+      )
+    |]
+    (cutoffTs, limit)
 
 -- | returns all connection queues, the first queue is the primary one
 getRcvQueuesByConnId_ :: DB.Connection -> ConnId -> IO (Maybe (NonEmpty RcvQueue))

src/Simplex/Messaging/Agent/Store/Postgres/Migrations/App.hs

@@ -16,7 +16,6 @@ import Simplex.Messaging.Agent.Store.Postgres.Migrations.M20260411_service_certs
 import Simplex.Messaging.Agent.Store.Postgres.Migrations.M20260712_address_dr_rpc
 import Simplex.Messaging.Agent.Store.Postgres.Migrations.M20260823_snd_files_entitlement
 import Simplex.Messaging.Agent.Store.Postgres.Migrations.M20260919_ratchet_verify_codes
-import Simplex.Messaging.Agent.Store.Postgres.Migrations.M20260929_ratchet_indexes
 import Simplex.Messaging.Agent.Store.Shared (Migration (..))
 
 schemaMigrations :: [(String, Text, Maybe Text)]
@@ -32,8 +31,7 @@ schemaMigrations =
     ("20260411_service_certs", m20260411_service_certs, Just down_m20260411_service_certs),
     ("20260712_address_dr_rpc", m20260712_address_dr_rpc, Just down_m20260712_address_dr_rpc),
     ("20260823_snd_files_entitlement", m20260823_snd_files_entitlement, Just down_m20260823_snd_files_entitlement),
-    ("20260919_ratchet_verify_codes", m20260919_ratchet_verify_codes, Just down_m20260919_ratchet_verify_codes),
-    ("20260929_ratchet_indexes", m20260929_ratchet_indexes, Just down_m20260929_ratchet_indexes)
+    ("20260919_ratchet_verify_codes", m20260919_ratchet_verify_codes, Just down_m20260919_ratchet_verify_codes)
   ]
 
 -- | The list of migrations in ascending order by date

src/Simplex/Messaging/Agent/Store/Postgres/Migrations/M20260929_ratchet_indexes.hs

@@ -1,34 +0,0 @@
-{-# LANGUAGE OverloadedStrings #-}
-{-# LANGUAGE QuasiQuotes #-}
-
-module Simplex.Messaging.Agent.Store.Postgres.Migrations.M20260929_ratchet_indexes where
-
-import Data.Text (Text)
-import Text.RawString.QQ (r)
-
-m20260929_ratchet_indexes :: Text
-m20260929_ratchet_indexes =
-  [r|
-DROP INDEX idx_skipped_messages_conn_id;
-CREATE INDEX idx_skipped_messages_conn_id ON skipped_messages(conn_id, skipped_message_id);
-
-DELETE FROM processed_ratchet_key_hashes AS h
-WHERE EXISTS (
-  SELECT 1 FROM processed_ratchet_key_hashes d
-  WHERE d.conn_id = h.conn_id AND d.hash = h.hash AND d.processed_ratchet_key_hash_id < h.processed_ratchet_key_hash_id
-);
-
-DROP INDEX idx_processed_ratchet_key_hashes_hash;
-CREATE UNIQUE INDEX idx_processed_ratchet_key_hashes_hash ON processed_ratchet_key_hashes(conn_id, hash);
-CREATE INDEX idx_processed_ratchet_key_hashes_conn_id ON processed_ratchet_key_hashes(conn_id, processed_ratchet_key_hash_id);
-|]
-
-down_m20260929_ratchet_indexes :: Text
-down_m20260929_ratchet_indexes =
-  [r|
-DROP INDEX idx_processed_ratchet_key_hashes_conn_id;
-DROP INDEX idx_processed_ratchet_key_hashes_hash;
-CREATE INDEX idx_processed_ratchet_key_hashes_hash ON processed_ratchet_key_hashes(conn_id, hash);
-DROP INDEX idx_skipped_messages_conn_id;
-CREATE INDEX idx_skipped_messages_conn_id ON skipped_messages(conn_id);
-|]

src/Simplex/Messaging/Agent/Store/Postgres/Migrations/agent_postgres_schema.sql

@@ -1169,15 +1169,11 @@ CREATE INDEX idx_ntf_tokens_ntf_host_ntf_port ON smp_agent_test_protocol_schema.
 
 
 
-CREATE INDEX idx_processed_ratchet_key_hashes_conn_id ON smp_agent_test_protocol_schema.processed_ratchet_key_hashes USING btree (conn_id, processed_ratchet_key_hash_id);
-
-
-
 CREATE INDEX idx_processed_ratchet_key_hashes_created_at ON smp_agent_test_protocol_schema.processed_ratchet_key_hashes USING btree (created_at);
 
 
 
-CREATE UNIQUE INDEX idx_processed_ratchet_key_hashes_hash ON smp_agent_test_protocol_schema.processed_ratchet_key_hashes USING btree (conn_id, hash);
+CREATE INDEX idx_processed_ratchet_key_hashes_hash ON smp_agent_test_protocol_schema.processed_ratchet_key_hashes USING btree (conn_id, hash);
 
 
 
@@ -1245,7 +1241,7 @@ CREATE UNIQUE INDEX idx_server_certs_user_id_host_port ON smp_agent_test_protoco
 
 
 
-CREATE INDEX idx_skipped_messages_conn_id ON smp_agent_test_protocol_schema.skipped_messages USING btree (conn_id, skipped_message_id);
+CREATE INDEX idx_skipped_messages_conn_id ON smp_agent_test_protocol_schema.skipped_messages USING btree (conn_id);
 
 
 

src/Simplex/Messaging/Agent/Store/SQLite/Migrations/App.hs

@@ -52,7 +52,6 @@ import Simplex.Messaging.Agent.Store.SQLite.Migrations.M20260411_service_certs
 import Simplex.Messaging.Agent.Store.SQLite.Migrations.M20260712_address_dr_rpc
 import Simplex.Messaging.Agent.Store.SQLite.Migrations.M20260823_snd_files_entitlement
 import Simplex.Messaging.Agent.Store.SQLite.Migrations.M20260919_ratchet_verify_codes
-import Simplex.Messaging.Agent.Store.SQLite.Migrations.M20260929_ratchet_indexes
 import Simplex.Messaging.Agent.Store.Shared (Migration (..))
 
 schemaMigrations :: [(String, Query, Maybe Query)]
@@ -104,8 +103,7 @@ schemaMigrations =
     ("m20260411_service_certs", m20260411_service_certs, Just down_m20260411_service_certs),
     ("m20260712_address_dr_rpc", m20260712_address_dr_rpc, Just down_m20260712_address_dr_rpc),
     ("m20260823_snd_files_entitlement", m20260823_snd_files_entitlement, Just down_m20260823_snd_files_entitlement),
-    ("m20260919_ratchet_verify_codes", m20260919_ratchet_verify_codes, Just down_m20260919_ratchet_verify_codes),
-    ("m20260929_ratchet_indexes", m20260929_ratchet_indexes, Just down_m20260929_ratchet_indexes)
+    ("m20260919_ratchet_verify_codes", m20260919_ratchet_verify_codes, Just down_m20260919_ratchet_verify_codes)
   ]
 
 -- | The list of migrations in ascending order by date

src/Simplex/Messaging/Agent/Store/SQLite/Migrations/M20260929_ratchet_indexes.hs

@@ -1,29 +0,0 @@
-{-# LANGUAGE QuasiQuotes #-}
-
-module Simplex.Messaging.Agent.Store.SQLite.Migrations.M20260929_ratchet_indexes where
-
-import Database.SQLite.Simple (Query)
-import Database.SQLite.Simple.QQ (sql)
-
--- idx_skipped_messages_conn_id is not changed: SQLite index entries include rowid (skipped_message_id)
-m20260929_ratchet_indexes :: Query
-m20260929_ratchet_indexes =
-  [sql|
-DELETE FROM processed_ratchet_key_hashes AS h
-WHERE EXISTS (
-  SELECT 1 FROM processed_ratchet_key_hashes d
-  WHERE d.conn_id = h.conn_id AND d.hash = h.hash AND d.processed_ratchet_key_hash_id < h.processed_ratchet_key_hash_id
-);
-
-DROP INDEX idx_processed_ratchet_key_hashes_hash;
-CREATE UNIQUE INDEX idx_processed_ratchet_key_hashes_hash ON processed_ratchet_key_hashes(conn_id, hash);
-CREATE INDEX idx_processed_ratchet_key_hashes_conn_id ON processed_ratchet_key_hashes(conn_id, processed_ratchet_key_hash_id);
-  |]
-
-down_m20260929_ratchet_indexes :: Query
-down_m20260929_ratchet_indexes =
-  [sql|
-DROP INDEX idx_processed_ratchet_key_hashes_conn_id;
-DROP INDEX idx_processed_ratchet_key_hashes_hash;
-CREATE INDEX idx_processed_ratchet_key_hashes_hash ON processed_ratchet_key_hashes(conn_id, hash);
-  |]

src/Simplex/Messaging/Agent/Store/SQLite/Migrations/agent_schema.sql

@@ -573,6 +573,10 @@ CREATE INDEX idx_encrypted_rcv_message_hashes_hash ON encrypted_rcv_message_hash
   conn_id,
   hash
 );
+CREATE INDEX idx_processed_ratchet_key_hashes_hash ON processed_ratchet_key_hashes(
+  conn_id,
+  hash
+);
 CREATE INDEX idx_snd_messages_rcpt_internal_id ON snd_messages(
   conn_id,
   rcpt_internal_id
@@ -637,14 +641,6 @@ CREATE INDEX idx_connections_deleted ON connections(deleted);
 CREATE INDEX idx_connections_service_request_expires_at ON connections(
   service_request_expires_at
 );
-CREATE UNIQUE INDEX idx_processed_ratchet_key_hashes_hash ON processed_ratchet_key_hashes(
-  conn_id,
-  hash
-);
-CREATE INDEX idx_processed_ratchet_key_hashes_conn_id ON processed_ratchet_key_hashes(
-  conn_id,
-  processed_ratchet_key_hash_id
-);
 CREATE TRIGGER tr_rcv_queue_insert
 AFTER INSERT ON rcv_queues
 FOR EACH ROW

src/Simplex/Messaging/Client.hs

@@ -35,8 +35,6 @@ module Simplex.Messaging.Client
     ProxiedRelay (..),
     getProtocolClient,
     closeProtocolClient,
-    failPendingRequests,
-    clientConnected,
     protocolClientServer,
     protocolClientServer',
     transportHost',
@@ -152,7 +150,7 @@ import Data.Int (Int64)
 import Data.List (find, isSuffixOf)
 import Data.List.NonEmpty (NonEmpty (..))
 import qualified Data.List.NonEmpty as L
-import Data.Maybe (catMaybes, fromMaybe, isJust)
+import Data.Maybe (catMaybes, fromMaybe)
 import Data.Text (Text)
 import qualified Data.Text as T
 import Data.Time.Clock (UTCTime (..), diffUTCTime, getCurrentTime)
@@ -197,7 +195,6 @@ data PClient v err msg = PClient
     transportHost :: TransportHost,
     tcpConnectTimeout :: NetworkTimeout,
     tcpTimeout :: NetworkTimeout,
-    proxiedRelayVRange :: VersionRange v,
     sendPings :: TVar Bool,
     lastReceived :: TVar UTCTime,
     timeoutErrorCount :: TVar Int,
@@ -243,7 +240,6 @@ smpClientStub g sessionId thVersion thAuth = do
               transportHost = "localhost",
               tcpConnectTimeout,
               tcpTimeout,
-              proxiedRelayVRange = supportedClientSMPRelayVRange,
               sendPings,
               lastReceived,
               timeoutErrorCount,
@@ -444,12 +440,9 @@ defaultNetworkConfig =
 
 transportClientConfig :: NetworkConfig -> NetworkRequestMode -> TransportHost -> Bool -> Maybe [ALPN] -> TransportClientConfig
 transportClientConfig NetworkConfig {socksProxy, socksMode, tcpConnectTimeout, tcpKeepAlive, logTLSErrors} nm host useSNI clientALPN =
-  TransportClientConfig {socksProxy = socks, tcpConnectTimeout = tOut, tcpKeepAlive = keepAlive, logTLSErrors, clientCredentials = Nothing, clientALPN, useSNI}
+  TransportClientConfig {socksProxy = useSocksProxy socksMode, tcpConnectTimeout = tOut, tcpKeepAlive, logTLSErrors, clientCredentials = Nothing, clientALPN, useSNI}
   where
     tOut = netTimeoutInt tcpConnectTimeout nm
-    socks = useSocksProxy socksMode
-    -- with SOCKS proxy the socket is connected to the proxy, and a slow circuit should not fail the connection
-    keepAlive = (\ka -> if isJust socks then ka {unackedDataTimeout = Nothing} else ka) <$> tcpKeepAlive
     socksProxy' = (\(SocksProxyWithAuth _ proxy) -> proxy) <$> socksProxy
     useSocksProxy SMAlways = socksProxy'
     useSocksProxy SMOnion = case host of
@@ -484,7 +477,6 @@ data ProtocolClientConfig v = ProtocolClientConfig
     serviceCredentials :: Maybe ServiceCredentials,
     -- | client-server protocol version range
     serverVRange :: VersionRange v,
-    proxiedRelayVRange :: VersionRange v,
     -- | agree shared session secret (used in SMP proxy for additional encryption layer)
     agreeSecret :: Bool,
     -- | Whether connecting client is a proxy server. See comment in ClientHandshake
@@ -503,7 +495,6 @@ defaultClientConfig clientALPN useSNI serverVRange =
       clientALPN,
       serviceCredentials = Nothing,
       serverVRange,
-      proxiedRelayVRange = serverVRange,
       agreeSecret = False,
       proxyServer = False,
       useSNI
@@ -514,7 +505,6 @@ defaultSMPClientConfig :: ProtocolClientConfig SMPVersion
 defaultSMPClientConfig =
   (defaultClientConfig (Just alpnSupportedSMPHandshakes) False supportedClientSMPRelayVRange)
     { defaultTransport = (show defaultSMPPort, transport @TLS),
-      proxiedRelayVRange = supportedClientSMPRelayVRange,
       agreeSecret = True
     }
 {-# INLINE defaultSMPClientConfig #-}
@@ -578,7 +568,7 @@ type SMPTransportSession = TransportSession BrokerMsg
 -- A single queue can be used for multiple 'SMPClient' instances,
 -- as 'SMPServerTransmission' includes server information.
 getProtocolClient :: forall v err msg. Protocol v err msg => TVar ChaChaDRG -> NetworkRequestMode -> TransportSession msg -> ProtocolClientConfig v -> [HostName] -> Maybe (TBQueue (ServerTransmissionBatch v err msg)) -> UTCTime -> (ProtocolClient v err msg -> IO ()) -> IO (Either (ProtocolClientError err) (ProtocolClient v err msg))
-getProtocolClient g nm transportSession@(_, srv, _) cfg@ProtocolClientConfig {qSize, networkConfig, clientALPN, serviceCredentials, serverVRange, proxiedRelayVRange, agreeSecret, proxyServer, useSNI} presetDomains msgQ proxySessTs disconnected = do
+getProtocolClient g nm transportSession@(_, srv, _) cfg@ProtocolClientConfig {qSize, networkConfig, clientALPN, serviceCredentials, serverVRange, agreeSecret, proxyServer, useSNI} presetDomains msgQ proxySessTs disconnected = do
   case chooseTransportHost networkConfig (host srv) of
     Right useHost ->
       (getCurrentTime >>= mkProtocolClient useHost >>= runClient useTransport useHost)
@@ -603,7 +593,6 @@ getProtocolClient g nm transportSession@(_, srv, _) cfg@ProtocolClientConfig {qS
             transportHost,
             tcpConnectTimeout,
             tcpTimeout,
-            proxiedRelayVRange,
             sendPings,
             lastReceived,
             timeoutErrorCount,
@@ -656,7 +645,7 @@ getProtocolClient g nm transportSession@(_, srv, _) cfg@ProtocolClientConfig {qS
             writeTVar (connected c) True
             putTMVar cVar $ Right c'
           raceAny_ ([send c' th, process c', receive c' th] <> [monitor c' | smpPingInterval > 0])
-            `E.finally` (atomically (writeTVar (connected c) False) >> disconnected c')
+            `E.finally` disconnected c'
 
     send :: Transport c => ProtocolClient v err msg -> THandle v c 'TClient -> IO ()
     send ProtocolClient {client_ = PClient {sndQ}} h = forever $ atomically (readTBQueue sndQ) >>= sendPending
@@ -761,13 +750,6 @@ closeProtocolClient :: ProtocolClient v err msg -> IO ()
 closeProtocolClient = mapM_ (deRefWeak >=> mapM_ killThread) . action
 {-# INLINE closeProtocolClient #-}
 
-clientConnected :: ProtocolClient v err msg -> STM Bool
-clientConnected ProtocolClient {client_ = PClient {connected}} = readTVar connected
-
-failPendingRequests :: ProtocolClient v err msg -> IO ()
-failPendingRequests ProtocolClient {client_ = PClient {sentCommands}} =
-  readTVarIO sentCommands >>= mapM_ (\Request {pending, responseVar} -> atomically $ whenM (swapTVar pending False) $ void $ tryPutTMVar responseVar $ Left $ PCENetworkError NEFailedError)
-
 -- | SMP client error type.
 data ProtocolClientError err
   = -- | Correctly parsed SMP server ERR response.
@@ -1133,10 +1115,10 @@ deleteSMPQueues = okSMPCommands DEL
 -- send PRXY :: SMPServer -> Maybe BasicAuth -> Command Sender
 -- receives PKEY :: SessionId -> X.CertificateChain -> X.SignedExact X.PubKey -> BrokerMsg
 connectSMPProxiedRelay :: SMPClient -> NetworkRequestMode -> SMPServer -> Maybe BasicAuth -> ExceptT SMPClientError IO ProxiedRelay
-connectSMPProxiedRelay c@ProtocolClient {client_ = PClient {tcpConnectTimeout, tcpTimeout, proxiedRelayVRange}} nm relayServ@ProtocolServer {port = relayPort, keyHash = C.KeyHash kh} proxyAuth =
+connectSMPProxiedRelay c@ProtocolClient {client_ = PClient {tcpConnectTimeout, tcpTimeout}} nm relayServ@ProtocolServer {port = relayPort, keyHash = C.KeyHash kh} proxyAuth =
   sendProtocolCommand_ c nm Nothing tOut Nothing NoEntity (Cmd SProxiedClient (PRXY relayServ proxyAuth)) >>= \case
     PKEY sId vr (CertChainPubKey chain key) ->
-      case proxiedRelayVRange `compatibleVersion` vr of
+      case supportedClientSMPRelayVRange `compatibleVersion` vr of
         Nothing -> throwE $ transportErr TEVersion
         Just (Compatible v) -> do
           relayKey <- liftEitherWith (const $ transportErr $ TEHandshake IDENTITY) =<< liftIO (runExceptT $ validateRelay chain key)
@@ -1187,7 +1169,7 @@ instance StrEncoding ProxyClientError where
 -- consider how to process slow responses - is it handled somehow locally or delegated to the caller
 -- this method is used in the client
 -- sends PFWD :: C.PublicKeyX25519 -> EncTransmission -> Command Sender
--- receives PRES :: Maybe C.CbNonce -> EncResponse -> BrokerMsg -- proxy to client
+-- receives PRES :: EncResponse -> BrokerMsg -- proxy to client
 
 -- When client sends message via proxy, there may be one successful scenario and 9 error scenarios
 -- as shown below (WTF stands for unexpected response, ??? for response that failed to parse).
@@ -1246,14 +1228,14 @@ proxySMPCommand c@ProtocolClient {thParams = proxyThParams, client_ = PClient {c
     TBError e _ : _ -> throwE $ PCETransportError e
     TBTransmission s _ : _ -> pure s
     TBTransmissions s _ _ : _ -> pure s
-  et <- liftEitherWith PCECryptoError $ EncTransmission <$> C.cbEncrypt cmdSecret (encTransmissionNonce v nonce) b paddedProxiedTLength
+  et <- liftEitherWith PCECryptoError $ EncTransmission <$> C.cbEncrypt cmdSecret nonce b paddedProxiedTLength
   -- proxy interaction errors are wrapped
   let tOut = Just $ 2 * netTimeoutInt tcpTimeout nm
   tryE (sendProtocolCommand_ c nm (Just nonce) tOut Nothing (EntityId sessionId) (Cmd SProxiedClient (PFWD v cmdPubKey et))) >>= \case
     Right r -> case r of
-      PRES nonce_ (EncResponse er) -> do
+      PRES (EncResponse er) -> do
         -- server interaction errors are thrown directly
-        t' <- liftEitherWith PCECryptoError $ C.cbDecrypt cmdSecret (fromMaybe (C.reverseNonce nonce) nonce_) er
+        t' <- liftEitherWith PCECryptoError $ C.cbDecrypt cmdSecret (C.reverseNonce nonce) er
         case tParse serverThParams t' of
           t'' :| [] -> case tDecodeClient serverThParams t'' of
             (_, _, cmd) -> case cmd of
@@ -1271,10 +1253,10 @@ proxySMPCommand c@ProtocolClient {thParams = proxyThParams, client_ = PClient {c
 
 -- this method is used in the proxy
 -- sends RFWD :: EncFwdTransmission -> Command Sender
--- receives RRES :: Maybe C.CbNonce -> EncFwdResponse -> BrokerMsg
+-- receives RRES :: EncFwdResponse -> BrokerMsg
 -- proxy should send PRES to the client with EncResponse
 -- Always uses background timeout mode
-forwardSMPTransmission :: SMPClient -> CorrId -> VersionSMP -> C.PublicKeyX25519 -> EncTransmission -> ExceptT SMPClientError IO (Maybe C.CbNonce, EncResponse)
+forwardSMPTransmission :: SMPClient -> CorrId -> VersionSMP -> C.PublicKeyX25519 -> EncTransmission -> ExceptT SMPClientError IO EncResponse
 forwardSMPTransmission c@ProtocolClient {thParams, client_ = PClient {clientCorrId = g}} fwdCorrId fwdVersion fwdKey fwdTransmission = do
   -- prepare params
   sessSecret <- case thAuth thParams of
@@ -1286,11 +1268,11 @@ forwardSMPTransmission c@ProtocolClient {thParams, client_ = PClient {clientCorr
       eft = EncFwdTransmission $ C.cbEncryptNoPad sessSecret nonce (smpEncode fwdT)
   -- send
   sendProtocolCommand_ c NRMBackground (Just nonce) Nothing Nothing NoEntity (Cmd SProxyService (RFWD eft)) >>= \case
-    RRES nonce_ (EncFwdResponse efr) -> do
+    RRES (EncFwdResponse efr) -> do
       -- unwrap
       r' <- liftEitherWith PCECryptoError $ C.cbDecryptNoPad sessSecret (C.reverseNonce nonce) efr
       FwdResponse {fwdCorrId = _, fwdResponse} <- liftEitherWith (const $ PCEResponseError BLOCK) $ smpDecode r'
-      pure (nonce_, fwdResponse)
+      pure fwdResponse
     r -> throwE $ unexpectedResponse r
 
 -- get queue information - always sent interactively

src/Simplex/Messaging/Crypto.hs

@@ -931,8 +931,6 @@ data CryptoError
     CERatchetEarlierMessage Word32
   | -- | duplicate message number
     CERatchetDuplicateMessage
-  | -- | KEM key generation failed, indicating a broken RNG
-    CryptoKEMKeyGenError
   deriving (Eq, Show, Exception)
 
 aesKeySize :: Int
@@ -1047,7 +1045,9 @@ md5Hash = BA.convert . (hash :: ByteString -> Digest MD5)
 
 -- | AEAD-GCM encryption with associated data.
 --
--- Used as part of double ratchet encryption, with a 16-byte IV (see @initAEAD@).
+-- Used as part of double ratchet encryption.
+-- This function requires 16 bytes IV, it transforms IV in cryptonite_aes_gcm_init here:
+-- https://github.com/haskell-crypto/cryptonite/blob/master/cbits/cryptonite_aes.c
 encryptAEAD :: Key -> IV -> Int -> ByteString -> ByteString -> ExceptT CryptoError IO (AuthTag, ByteString)
 encryptAEAD aesKey ivBytes paddedLen ad msg = do
   aead <- initAEAD @AES256 aesKey ivBytes
@@ -1067,7 +1067,10 @@ encryptAEADNoPad aesKey ivBytes ad msg = do
 
 -- | AEAD-GCM decryption with associated data.
 --
--- Used as part of double ratchet encryption, with a 16-byte IV (see @initAEAD@).
+-- Used as part of double ratchet encryption.
+-- This function requires 16 bytes IV, it transforms IV in cryptonite_aes_gcm_init here:
+-- https://github.com/haskell-crypto/cryptonite/blob/master/cbits/cryptonite_aes.c
+-- To make it compatible with WebCrypto we will need to start using initAEADGCM.
 decryptAEAD :: Key -> IV -> ByteString -> ByteString -> AuthTag -> ExceptT CryptoError IO ByteString
 decryptAEAD aesKey ivBytes ad msg (AuthTag authTag) = do
   aead <- initAEAD @AES256 aesKey ivBytes
@@ -1145,9 +1148,9 @@ maxLength :: forall i. KnownNat i => Int
 maxLength = fromIntegral (natVal $ Proxy @i)
 {-# INLINE maxLength #-}
 
--- The 16-byte double ratchet IV is intentionally not the 96-bit IV recommended by NIST SP 800-38D, so GCM derives J0 = GHASH(IV || 0^64 || [128]_64),
--- as in crypton_aes_gcm_init: https://hackage.haskell.org/package/crypton-0.34/src/cbits/crypton_aes.c
--- WebCrypto and other SP 800-38D implementations interoperate only when given all 16 IV bytes.
+-- this function requires 16 bytes IV, it transforms IV in cryptonite_aes_gcm_init here:
+-- https://github.com/haskell-crypto/cryptonite/blob/master/cbits/cryptonite_aes.c
+-- This is used for double ratchet encryption, so to make it compatible with WebCrypto we will need to deprecate it and start using initAEADGCM
 initAEAD :: forall c. AES.BlockCipher c => Key -> IV -> ExceptT CryptoError IO (AES.AEAD c)
 initAEAD (Key aesKey) (IV ivBytes) = do
   iv <- makeIV @c ivBytes

src/Simplex/Messaging/Crypto/Ratchet.hs

@@ -72,7 +72,6 @@ module Simplex.Messaging.Crypto.Ratchet
     rcEncryptHeader,
     rcEncryptMsg,
     rcDecrypt,
-    maxSkippedMsgKeys,
     -- used in tests
     MsgHeader (..),
     RatchetInitParams (..),
@@ -120,7 +119,7 @@ import Simplex.Messaging.Crypto.SNTRUP761.Bindings
 import Simplex.Messaging.Encoding
 import Simplex.Messaging.Encoding.String
 import Simplex.Messaging.Parsers (defaultJSON, parseE, parseE')
-import Simplex.Messaging.Util ((<$?>))
+import Simplex.Messaging.Util (($>>=), (<$?>))
 import Simplex.Messaging.Version
 import Simplex.Messaging.Version.Internal
 import UnliftIO.STM
@@ -328,13 +327,9 @@ instance StrEncoding AnyE2ERatchetParamsUri where
             Nothing -> pure $ AnyE2ERatchetParamsUri SRKSProposed a $ E2ERatchetParamsUri vr k1 k2 Nothing
       _ -> fail "bad e2e params"
     where
-      kemP query = do
-        k_ <- queryParam_ "kem_key" query
-        ct_ <- queryParam_ "kem_ct" query
-        case (k_, ct_) of
-          (Just k, _) -> pure $ Just $ kemParams k ct_
-          (Nothing, Nothing) -> pure Nothing
-          (Nothing, Just _) -> fail "bad e2e params: kem_ct without kem_key"
+      kemP query =
+        queryParam_ "kem_key" query
+          $>>= \k -> Just . kemParams k <$> queryParam_ "kem_ct" query
       kemParams k = \case
         Nothing -> ARKP SRKSProposed $ RKParamsProposed k
         Just ct -> ARKP SRKSAccepted $ RKParamsAccepted ct k
@@ -963,9 +958,6 @@ type DecryptResult a = (Either CryptoError ByteString, Ratchet a, SkippedMsgDiff
 maxSkip :: Word32
 maxSkip = 512
 
-maxSkippedMsgKeys :: Int
-maxSkippedMsgKeys = 2000
-
 rcDecrypt ::
   forall a.
   (AlgorithmI a, DhAlgorithm a) =>

src/Simplex/Messaging/Crypto/SNTRUP761/Bindings.hs

@@ -16,8 +16,6 @@ module Simplex.Messaging.Crypto.SNTRUP761.Bindings
   ) where
 
 import Control.Concurrent.STM
-import Control.Exception (throwIO)
-import Control.Monad (when)
 import Crypto.Random (ChaChaDRG)
 import Data.Aeson (FromJSON (..), ToJSON (..))
 import Data.Bifunctor (bimap)
@@ -25,7 +23,6 @@ import Data.ByteArray (ScrubbedBytes)
 import qualified Data.ByteArray as BA
 import Data.ByteString (ByteString)
 import Simplex.Messaging.Agent.Store.DB (FromField (..), ToField (..))
-import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Crypto.SNTRUP761.Bindings.Defines
 import Simplex.Messaging.Crypto.SNTRUP761.Bindings.FFI
 import Simplex.Messaging.Crypto.SNTRUP761.Bindings.RNG (rngFuncPtr, withDRG)
@@ -58,13 +55,14 @@ pattern KEMSharedKey s <- KEMSharedKey_ s
 type KEMKeyPair = (KEMPublicKey, KEMSecretKey)
 
 sntrup761Keypair :: TVar ChaChaDRG -> IO KEMKeyPair
-sntrup761Keypair drg = do
-  ((r, pk), sk) <-
-    BA.allocRet c_SNTRUP761_SECRETKEY_SIZE $ \skPtr ->
-      BA.allocRet c_SNTRUP761_PUBLICKEY_SIZE $ \pkPtr ->
-        withDRG drg $ \cxtPtr -> c_sntrup761_keypair pkPtr skPtr cxtPtr rngFuncPtr
-  when (r /= 0) $ throwIO C.CryptoKEMKeyGenError
-  pure (KEMPublicKey_ pk, KEMSecretKey sk)
+sntrup761Keypair drg =
+  bimap KEMPublicKey_ KEMSecretKey
+    <$> BA.allocRet
+      c_SNTRUP761_SECRETKEY_SIZE
+      ( \skPtr ->
+          BA.alloc c_SNTRUP761_PUBLICKEY_SIZE $ \pkPtr ->
+            withDRG drg $ \cxtPtr -> c_sntrup761_keypair pkPtr skPtr cxtPtr rngFuncPtr
+      )
 
 sntrup761Enc :: TVar ChaChaDRG -> KEMPublicKey -> IO (KEMCiphertext, KEMSharedKey)
 sntrup761Enc drg (KEMPublicKey pk) =

src/Simplex/Messaging/Crypto/SNTRUP761/Bindings/FFI.hs

@@ -10,9 +10,9 @@ import Foreign
 import Foreign.C
 import Simplex.Messaging.Crypto.SNTRUP761.Bindings.RNG (RNGContext, RNGFunc)
 
--- int sntrup761_keypair (uint8_t *pk, uint8_t *sk, void *random_ctx, sntrup761_random_func *random);
+-- void sntrup761_keypair (uint8_t *pk, uint8_t *sk, void *random_ctx, sntrup761_random_func *random);
 foreign import ccall "sntrup761_keypair"
-  c_sntrup761_keypair :: Ptr Word8 -> Ptr Word8 -> Ptr RNGContext -> FunPtr RNGFunc -> IO CInt
+  c_sntrup761_keypair :: Ptr Word8 -> Ptr Word8 -> Ptr RNGContext -> FunPtr RNGFunc -> IO ()
 
 -- void sntrup761_enc (uint8_t *c, uint8_t *k, const uint8_t *pk, void *random_ctx, sntrup761_random_func *random);
 foreign import ccall "sntrup761_enc"

src/Simplex/Messaging/Notifications/Server.hs

@@ -72,6 +72,7 @@ import Simplex.Messaging.Notifications.Transport
 import Simplex.Messaging.Protocol (EntityId (..), ErrorType (..), NotifierId, Party (..), ProtocolServer (host), SMPServer, ServiceSub (..), SignedTransmission, Transmission, pattern NoEntity, pattern SMPServer, encodeTransmission, tGetServer, tPut)
 import qualified Simplex.Messaging.Protocol as SMP
 import Simplex.Messaging.Server
+import Simplex.Messaging.Server.AddressStats (AddrStats, ServerAddrStats (..), addressStatsThread, incAddrCounter, printTopAddresses, withAddrStats)
 import Simplex.Messaging.Server.Control (CPClientRole (..))
 import Simplex.Messaging.Server.Env.STM (StartOptions (..))
 import Simplex.Messaging.Server.Stats (PeriodStats (..), PeriodStatCounts (..), periodStatCounts, periodStatDataCounts, updatePeriodStats)
@@ -80,7 +81,7 @@ import Simplex.Messaging.SystemTime
 import Simplex.Messaging.TMap (TMap)
 import Simplex.Messaging.Transport (ASrvTransport, ATransport (..), THandle (..), THandleAuth (..), THandleParams (..), TProxy, Transport (..), TransportPeer (..), defaultSupportedParams)
 import Simplex.Messaging.Transport.Buffer (trimCR)
-import Simplex.Messaging.Transport.Server (AddHTTP, runTransportServer, runLocalTCPServer)
+import Simplex.Messaging.Transport.Server (AddHTTP, TLSServerCredential (..), newSocketState, runLocalTCPServer, runTransportServerState_)
 import Simplex.Messaging.Util
 import System.Environment (lookupEnv)
 import System.Exit (exitFailure, exitSuccess)
@@ -122,6 +123,7 @@ ntfServer cfg@NtfServerConfig {transports, transportConfig = tCfg, startOptions}
         : map runServer transports
           <> serverStatsThread_ cfg
           <> prometheusMetricsThread_ cfg
+          <> addressStatsThread_ cfg
           <> controlPortThread_ cfg
     )
     `finally` stopServer
@@ -131,16 +133,20 @@ ntfServer cfg@NtfServerConfig {transports, transportConfig = tCfg, startOptions}
       srvCreds <- asks tlsServerCreds
       serverSignKey <- either fail pure $ C.x509ToPrivate' $ snd srvCreds
       env <- ask
-      liftIO $ runTransportServer started tcpPort defaultSupportedParams srvCreds tCfg $ \h -> runClient serverSignKey t h `runReaderT` env
+      ss <- liftIO newSocketState
+      liftIO $ runTransportServerState_ ss started tcpPort defaultSupportedParams TLSServerCredential {credential = srvCreds, sniCredential = Nothing} tCfg $ \sock (_, h) ->
+        runClient serverSignKey t sock h `runReaderT` env
 
-    runClient :: Transport c => C.APrivateSignKey -> TProxy c 'TServer -> c 'TServer -> M ()
-    runClient signKey _ h = do
-      kh <- asks serverIdentity
-      ks <- atomically . C.generateKeyPair =<< asks random
-      NtfServerConfig {ntfServerVRange} <- asks config
-      liftIO (runExceptT $ ntfServerHandshake signKey h ks kh ntfServerVRange) >>= \case
-        Right th -> runNtfClientTransport th
-        Left _ -> pure ()
+    runClient :: Transport c => C.APrivateSignKey -> TProxy c 'TServer -> Socket -> c 'TServer -> M ()
+    runClient signKey _ sock h = do
+      stats_ <- asks addrStats
+      withAddrStats (addrStatsMap <$> stats_) sock $ \addrStats_ -> do
+        kh <- asks serverIdentity
+        ks <- atomically . C.generateKeyPair =<< asks random
+        NtfServerConfig {ntfServerVRange} <- asks config
+        liftIO (runExceptT $ ntfServerHandshake signKey h ks kh ntfServerVRange) >>= \case
+          Right th -> runNtfClientTransport addrStats_ th
+          Left _ -> pure ()
 
     stopServer :: M ()
     stopServer = do
@@ -231,6 +237,10 @@ ntfServer cfg@NtfServerConfig {transports, transportConfig = tCfg, startOptions}
       [savePrometheusMetrics interval prometheusMetricsFile]
     prometheusMetricsThread_ _ = []
 
+    addressStatsThread_ :: NtfServerConfig -> [M ()]
+    addressStatsThread_ NtfServerConfig {addressStats = Just statsCfg} = [asks addrStats >>= mapM_ (liftIO . addressStatsThread statsCfg)]
+    addressStatsThread_ _ = []
+
     savePrometheusMetrics :: Int -> FilePath -> M ()
     savePrometheusMetrics saveInterval metricsFile = do
       labelMyThread "savePrometheusMetrics"
@@ -256,7 +266,7 @@ ntfServer cfg@NtfServerConfig {transports, transportConfig = tCfg, startOptions}
       pure NtfServerMetrics {statsData = d, activeTokensCounts = psTkns, activeSubsCounts = psSubs, tokenCount, approxSubCount, lastNtfCount, rtsOptions}
 
     getNtfRealTimeMetrics :: NtfEnv -> IO NtfRealTimeMetrics
-    getNtfRealTimeMetrics NtfEnv {subscriber, pushServer} = do
+    getNtfRealTimeMetrics NtfEnv {subscriber, pushServer, addrStats} = do
 #if MIN_VERSION_base(4,18,0)
       threadsCount <- length <$> listThreads
 #else
@@ -274,6 +284,7 @@ ntfServer cfg@NtfServerConfig {transports, transportConfig = tCfg, startOptions}
       ntfPendingQueueSubs <- getSMPSubMetrics a pendingQueueSubs
       smpSessionCount <- M.size <$> readTVarIO smpSessions
       apnsPushQLength <- pushWorkersQLength pushWorkers
+      addressHistograms <- mapM (readIORef . addrHistograms) addrStats
       pure
         NtfRealTimeMetrics
           { threadsCount,
@@ -285,7 +296,8 @@ ntfServer cfg@NtfServerConfig {transports, transportConfig = tCfg, startOptions}
             ntfPendingServiceSubs,
             ntfPendingQueueSubs,
             smpSessionCount,
-            apnsPushQLength
+            apnsPushQLength,
+            addressHistograms
           }
       where
         getSMPServiceSubMetrics :: forall sub. SMPClientAgent 'NotifierService -> (SMPClientAgent 'NotifierService -> TMap SMPServer (TVar (Maybe sub))) -> (sub -> Int64) -> IO NtfSMPSubMetrics
@@ -441,7 +453,10 @@ ntfServer cfg@NtfServerConfig {transports, transportConfig = tCfg, startOptions}
                       T.hPutStrLn h $ name <> " own servers count: " <> tshow (length ownServers)
                       when (r == CPRAdmin) $ T.hPutStrLn h $ name <> " own servers: " <> T.intercalate "," ownServers
                       T.hPutStrLn h $ name <> " other servers count: " <> tshow otherServers
-              CPHelp -> hPutStrLn h "commands: stats, stats-rts, server-info, help, quit"
+              CPAddresses name n_ -> withUserRole $ do
+                stats_ <- unliftIO u $ asks addrStats
+                printTopAddresses h (addrStatsMap <$> stats_) name n_
+              CPHelp -> hPutStrLn h "commands: stats, stats-rts, server-info, addresses, help, quit"
               CPQuit -> pure ()
               CPSkip -> pure ()
               where
@@ -756,11 +771,11 @@ periodicNtfsThread s = do
     cnt <- withPeriodicNtfTokens st now $ \tkn -> unlift $ pushNotification s Nothing False tkn PNCheckMessages
     logNote $ "Scheduled periodic notifications: " <> tshow cnt
 
-runNtfClientTransport :: Transport c => THandleNTF c 'TServer -> M ()
-runNtfClientTransport th@THandle {params} = do
+runNtfClientTransport :: Transport c => Maybe (AddrStats NtfAddrCounter) -> THandleNTF c 'TServer -> M ()
+runNtfClientTransport addrStats_ th@THandle {params} = do
   qSize <- asks $ clientQSize . config
   ts <- liftIO getSystemTime
-  c <- liftIO $ newNtfServerClient qSize params ts
+  c <- liftIO $ newNtfServerClient qSize params ts addrStats_
   s <- asks subscriber
   ps <- asks pushServer
   expCfg <- asks $ inactiveClientExpiration . config
@@ -775,7 +790,7 @@ clientDisconnected :: NtfServerClient -> IO ()
 clientDisconnected NtfServerClient {connected} = atomically $ writeTVar connected False
 
 receive :: Transport c => NtfPostgresStore -> THandleNTF c 'TServer -> NtfServerClient -> IO ()
-receive st th@THandle {params = THandleParams {thAuth}} NtfServerClient {rcvQ, sndQ, rcvActiveAt} = forever $ do
+receive st th@THandle {params = THandleParams {thAuth}} NtfServerClient {rcvQ, sndQ, rcvActiveAt, ntfClientAddrStats} = forever $ do
   ts <- L.toList <$> tGetServer th
   atomically . (writeTVar rcvActiveAt $!) =<< getSystemTime
   (errs, cmds) <- partitionEithers <$> mapM cmdAction ts
@@ -784,17 +799,21 @@ receive st th@THandle {params = THandleParams {thAuth}} NtfServerClient {rcvQ, s
   where
     cmdAction = \case
       Left (corrId, entId, e) -> do
+        incAddrStats NACErrors
         logError $ "invalid client request: " <> tshow e
         pure $ Left (corrId, entId, NRErr e)
-      Right t@(_, _, (corrId, entId, _)) ->
+      Right t@(_, _, (corrId, entId, cmd)) -> do
+        incAddrStats $ ntfCmdCounter cmd
         verified =<< verifyNtfTransmission st thAuth t
         where
           verified = \case
             VRVerified req -> pure $ Right req
             VRFailed e -> do
+              incAddrStats NACErrors
               logError "unauthorized client request"
               pure $ Left (corrId, entId, NRErr e)
     write q = mapM_ (atomically . writeTBQueue q) . L.nonEmpty
+    incAddrStats c = forM_ ntfClientAddrStats (`incAddrCounter` c)
 
 send :: Transport c => THandleNTF c 'TServer -> NtfServerClient -> IO ()
 send h@THandle {params} NtfServerClient {sndQ, sndActiveAt} = forever $ do

src/Simplex/Messaging/Notifications/Server/Control.hs

@@ -7,14 +7,17 @@ module Simplex.Messaging.Notifications.Server.Control
 where
 
 import qualified Data.Attoparsec.ByteString.Char8 as A
+import Data.Text (Text)
 import Simplex.Messaging.Encoding.String
 import Simplex.Messaging.Protocol (BasicAuth)
+import Simplex.Messaging.Server.AddressStats (addressesArgs, addressesArgsP)
 
 data ControlProtocol
   = CPAuth BasicAuth
   | CPStats
   | CPStatsRTS
   | CPServerInfo
+  | CPAddresses Text (Maybe Int)
   | CPHelp
   | CPQuit
   | CPSkip
@@ -25,6 +28,7 @@ instance StrEncoding ControlProtocol where
     CPStats -> "stats"
     CPStatsRTS -> "stats-rts"
     CPServerInfo -> "server-info"
+    CPAddresses name n_ -> "addresses " <> addressesArgs name n_
     CPHelp -> "help"
     CPQuit -> "quit"
     CPSkip -> ""
@@ -34,6 +38,7 @@ instance StrEncoding ControlProtocol where
       "stats" -> pure CPStats
       "stats-rts" -> pure CPStatsRTS
       "server-info" -> pure CPServerInfo
+      "addresses" -> uncurry CPAddresses <$> addressesArgsP
       "help" -> pure CPHelp
       "quit" -> pure CPQuit
       "" -> pure CPSkip

src/Simplex/Messaging/Notifications/Server/Env.hs

@@ -19,6 +19,8 @@ module Simplex.Messaging.Notifications.Server.Env
     PushWorkerVar,
     NtfRequest (..),
     NtfServerClient (..),
+    NtfAddrCounter (..),
+    ntfCmdCounter,
     defaultInactiveClientExpiration,
     newNtfServerEnv,
     newNtfSubscriber,
@@ -55,6 +57,7 @@ import Simplex.Messaging.Notifications.Server.Store.Postgres
 import Simplex.Messaging.Notifications.Server.Store.Types
 import Simplex.Messaging.Notifications.Transport (NTFVersion, VersionRangeNTF)
 import Simplex.Messaging.Protocol (BasicAuth, CorrId, Party (..), SMPServer, SParty (..), ServiceId, Transmission)
+import Simplex.Messaging.Server.AddressStats (AddrCounter (..), AddrStats, AddressStatsConfig, ServerAddrStats, newServerAddrStats)
 import Simplex.Messaging.Server.Env.STM (StartOptions (..))
 import Simplex.Messaging.Server.Expiration
 import Simplex.Messaging.Server.QueueStore.Postgres.Config (PostgresStoreCfg (..))
@@ -97,6 +100,7 @@ data NtfServerConfig = NtfServerConfig
     -- | interval and file to save prometheus metrics
     prometheusInterval :: Maybe Int,
     prometheusMetricsFile :: FilePath,
+    addressStats :: Maybe AddressStatsConfig,
     ntfServerVRange :: VersionRangeNTF,
     transportConfig :: TransportServerConfig,
     startOptions :: StartOptions
@@ -117,11 +121,56 @@ data NtfEnv = NtfEnv
     random :: TVar ChaChaDRG,
     tlsServerCreds :: TLS.Credential,
     serverIdentity :: C.KeyHash,
-    serverStats :: NtfServerStats
+    serverStats :: NtfServerStats,
+    addrStats :: Maybe (ServerAddrStats NtfAddrCounter)
   }
 
+data NtfAddrCounter
+  = NACConnections
+  | NACErrors
+  | NACTNew
+  | NACTVfy
+  | NACTChk
+  | NACTRpl
+  | NACTDel
+  | NACTCrn
+  | NACSNew
+  | NACSChk
+  | NACSDel
+  | NACPing
+  deriving (Eq, Ord, Enum, Bounded, Show)
+
+instance AddrCounter NtfAddrCounter where
+  counterName = \case
+    NACConnections -> "connections"
+    NACErrors -> "errors"
+    NACTNew -> "TNEW"
+    NACTVfy -> "TVFY"
+    NACTChk -> "TCHK"
+    NACTRpl -> "TRPL"
+    NACTDel -> "TDEL"
+    NACTCrn -> "TCRN"
+    NACSNew -> "SNEW"
+    NACSChk -> "SCHK"
+    NACSDel -> "SDEL"
+    NACPing -> "PING"
+  connectionsCounter = NACConnections
+
+ntfCmdCounter :: NtfCmd -> NtfAddrCounter
+ntfCmdCounter (NtfCmd _ cmd) = case cmd of
+  TNEW _ -> NACTNew
+  TVFY _ -> NACTVfy
+  TCHK -> NACTChk
+  TRPL _ -> NACTRpl
+  TDEL -> NACTDel
+  TCRN _ -> NACTCrn
+  SNEW _ -> NACSNew
+  SCHK -> NACSChk
+  SDEL -> NACSDel
+  PING -> NACPing
+
 newNtfServerEnv :: NtfServerConfig -> IO NtfEnv
-newNtfServerEnv config@NtfServerConfig {pushQSize, smpAgentCfg, apnsConfig, dbStoreConfig, ntfCredentials, useServiceCreds} = do
+newNtfServerEnv config@NtfServerConfig {pushQSize, smpAgentCfg, apnsConfig, dbStoreConfig, ntfCredentials, useServiceCreds, addressStats} = do
   random <- C.newRandom
   store <- newNtfDbStore dbStoreConfig
   tlsServerCreds <- loadServerCredential ntfCredentials
@@ -130,7 +179,8 @@ newNtfServerEnv config@NtfServerConfig {pushQSize, smpAgentCfg, apnsConfig, dbSt
   subscriber <- newNtfSubscriber smpAgentCfg dbService random
   pushServer <- newNtfPushServer pushQSize apnsConfig
   serverStats <- newNtfServerStats =<< getCurrentTime
-  pure NtfEnv {config, subscriber, pushServer, store, random, tlsServerCreds, serverIdentity = C.KeyHash fp, serverStats}
+  addrStats <- mapM (const newServerAddrStats) addressStats
+  pure NtfEnv {config, subscriber, pushServer, store, random, tlsServerCreds, serverIdentity = C.KeyHash fp, serverStats, addrStats}
   where
     mkDbService g st = DBService {getCredentials, updateServiceId}
       where
@@ -242,14 +292,15 @@ data NtfServerClient = NtfServerClient
     ntfThParams :: THandleParams NTFVersion 'TServer,
     connected :: TVar Bool,
     rcvActiveAt :: TVar SystemTime,
-    sndActiveAt :: TVar SystemTime
+    sndActiveAt :: TVar SystemTime,
+    ntfClientAddrStats :: Maybe (AddrStats NtfAddrCounter)
   }
 
-newNtfServerClient :: Natural -> THandleParams NTFVersion 'TServer -> SystemTime -> IO NtfServerClient
-newNtfServerClient qSize ntfThParams ts = do
+newNtfServerClient :: Natural -> THandleParams NTFVersion 'TServer -> SystemTime -> Maybe (AddrStats NtfAddrCounter) -> IO NtfServerClient
+newNtfServerClient qSize ntfThParams ts ntfClientAddrStats = do
   rcvQ <- newTBQueueIO qSize
   sndQ <- newTBQueueIO qSize
   connected <- newTVarIO True
   rcvActiveAt <- newTVarIO ts
   sndActiveAt <- newTVarIO ts
-  return NtfServerClient {rcvQ, sndQ, ntfThParams, connected, rcvActiveAt, sndActiveAt}
+  return NtfServerClient {rcvQ, sndQ, ntfThParams, connected, rcvActiveAt, sndActiveAt, ntfClientAddrStats}

src/Simplex/Messaging/Notifications/Server/Main.hs

@@ -141,6 +141,8 @@ ntfServerCLI cfgPath logPath =
                \disconnect = off\n"
             <> ("# ttl = " <> tshow (ttl defaultInactiveClientExpiration) <> "\n")
             <> ("# check_interval = " <> tshow (checkInterval defaultInactiveClientExpiration) <> "\n")
+            <> "\n"
+            <> addressStatsIniContent
     enableStoreLog' = settingIsOn "STORE_LOG" "enable"
     runServer startOptions ini = do
       setLogLevel $ logLevel startOptions
@@ -216,6 +218,7 @@ ntfServerCLI cfgPath logPath =
               serverStatsBackupFile = logStats $> combine logPath "ntf-server-stats.log",
               prometheusInterval = eitherToMaybe $ read . T.unpack <$> lookupValue "STORE_LOG" "prometheus_interval" ini,
               prometheusMetricsFile = combine logPath "ntf-server-metrics.txt",
+              addressStats = iniAddressStats ini,
               ntfServerVRange = supportedServerNTFVRange,
               transportConfig =
                 mkTransportServerConfig

src/Simplex/Messaging/Notifications/Server/Prometheus.hs

@@ -21,7 +21,9 @@ import Data.Time.Clock (UTCTime (..), diffUTCTime)
 import Data.Time.Clock.System (systemEpochDay)
 import Data.Time.Format.ISO8601 (iso8601Show)
 import Numeric.Natural (Natural)
+import Simplex.Messaging.Notifications.Server.Env (NtfAddrCounter)
 import Simplex.Messaging.Notifications.Server.Stats
+import Simplex.Messaging.Server.AddressStats (AddrHistogram, addrHistogramMetrics)
 import Simplex.Messaging.Server.Stats (PeriodStatCounts (..))
 import Simplex.Messaging.Transport (simplexMQVersion)
 import Simplex.Messaging.Util (tshow)
@@ -49,7 +51,8 @@ data NtfRealTimeMetrics = NtfRealTimeMetrics
     ntfPendingServiceSubs :: NtfSMPSubMetrics,
     ntfPendingQueueSubs :: NtfSMPSubMetrics,
     smpSessionCount :: Int,
-    apnsPushQLength :: Natural
+    apnsPushQLength :: Natural,
+    addressHistograms :: Maybe (M.Map NtfAddrCounter AddrHistogram)
   }
 
 data NtfSMPWorkerMetrics = NtfSMPWorkerMetrics {ownServers :: [Text], otherServers :: Int}
@@ -59,7 +62,7 @@ data NtfSMPSubMetrics = NtfSMPSubMetrics {ownSrvSubs :: M.Map Text Int, otherSer
 {-# FOURMOLU_DISABLE\n#-}
 ntfPrometheusMetrics :: NtfServerMetrics -> NtfRealTimeMetrics -> UTCTime -> Text
 ntfPrometheusMetrics sm rtm ts =
-  time <> tokens <> subscriptions <> notifications <> info
+  time <> tokens <> subscriptions <> notifications <> clientAddresses <> info
   where
     NtfServerMetrics {statsData, activeTokensCounts = psTkns, activeSubsCounts = psSubs, tokenCount, approxSubCount, lastNtfCount, rtsOptions} = sm
     NtfRealTimeMetrics
@@ -72,7 +75,8 @@ ntfPrometheusMetrics sm rtm ts =
         ntfPendingServiceSubs,
         ntfPendingQueueSubs,
         smpSessionCount,
-        apnsPushQLength
+        apnsPushQLength,
+        addressHistograms
       } = rtm
     NtfServerStatsData
       { _fromTime,
@@ -221,6 +225,7 @@ ntfPrometheusMetrics sm rtm ts =
       <> showNtfsByServer _ntfReceivedAuthOwn "simplex_ntf_notifications_received_auth_own" "Received notifications without token or subscription (AUTH error)" "ntfReceivedAuthOwn"
       <> showNtfsByServer _ntfDeliveredOwn "simplex_ntf_notifications_delivered_own" "Delivered notifications" "ntfDeliveredOwn"
       <> showNtfsByServer _ntfFailedOwn "simplex_ntf_notifications_failed_own" "Failed notifications" "ntfFailedOwn"
+    clientAddresses = maybe "" (addrHistogramMetrics "simplex_ntf" tsEpoch) addressHistograms
     info =
       "# Info\n\
       \# ----\n\

src/Simplex/Messaging/Protocol.hs

@@ -168,7 +168,6 @@ module Simplex.Messaging.Protocol
     EncFwdTransmission (..),
     EncResponse (..),
     EncTransmission (..),
-    encTransmissionNonce,
     FwdResponse (..),
     FwdTransmission (..),
     NameRecord (..),
@@ -242,7 +241,6 @@ import Data.Attoparsec.ByteString.Char8 (Parser, (<?>))
 import qualified Data.Attoparsec.ByteString.Char8 as A
 import Data.Bifunctor (bimap, first)
 import Data.Bits (xor)
-import qualified Data.ByteArray as BA
 import qualified Data.ByteString as BS
 import qualified Data.ByteString.Base64 as B64
 import Data.ByteString.Char8 (ByteString)
@@ -281,7 +279,7 @@ import Simplex.Messaging.ServiceScheme
 import Simplex.Messaging.SimplexName (LabelHash, SimplexDomain (..), SimplexTLD (..), fullDomainName, labelHash)
 import Simplex.Messaging.Transport
 import Simplex.Messaging.Transport.Client (TransportHost, TransportHosts (..))
-import Simplex.Messaging.Util (bshow, eitherToMaybe, packZipWith, safeDecodeUtf8, (<$?>))
+import Simplex.Messaging.Util (bshow, eitherToMaybe, safeDecodeUtf8, (<$?>))
 import Simplex.Messaging.Version
 import Simplex.Messaging.Version.Internal
 
@@ -703,11 +701,6 @@ instance Encoding NewNtfCreds where
 newtype EncTransmission = EncTransmission ByteString
   deriving (Show)
 
-encTransmissionNonce :: VersionSMP -> C.CbNonce -> C.CbNonce
-encTransmissionNonce v nonce@(C.CbNonce s)
-  | v >= fwdNoncesSMPVersion = C.cbNonce $ packZipWith xor (smpEncode v) s <> BS.drop 2 s
-  | otherwise = nonce
-
 data FwdTransmission = FwdTransmission
   { fwdCorrId :: CorrId,
     fwdVersion :: VersionSMP,
@@ -743,8 +736,8 @@ data BrokerMsg where
   NMSG :: C.CbNonce -> EncNMsgMeta -> BrokerMsg
   -- Should include certificate chain
   PKEY :: SessionId -> VersionRangeSMP -> CertChainPubKey -> BrokerMsg -- TLS-signed server key for proxy shared secret and initial sender key
-  RRES :: Maybe C.CbNonce -> EncFwdResponse -> BrokerMsg -- relay to proxy
-  PRES :: Maybe C.CbNonce -> EncResponse -> BrokerMsg -- proxy to client
+  RRES :: EncFwdResponse -> BrokerMsg -- relay to proxy
+  PRES :: EncResponse -> BrokerMsg -- proxy to client
   END :: BrokerMsg
   ENDS :: Int64 -> IdsHash -> BrokerMsg
   DELD :: BrokerMsg
@@ -1330,10 +1323,7 @@ instance ProtocolTypeI p => FromJSON (ProtocolServer p) where
   parseJSON = strParseJSON "ProtocolServer"
 
 newtype BasicAuth = BasicAuth {unBasicAuth :: ByteString}
-  deriving (Ord, Show)
-
-instance Eq BasicAuth where
-  BasicAuth s == BasicAuth s' = BA.constEq s s'
+  deriving (Eq, Ord, Show)
 
 instance IsString BasicAuth where fromString = BasicAuth . B.pack
 
@@ -1824,7 +1814,8 @@ instance PartyI p => ProtocolEncoding SMPVersion ErrorType (Command p) where
   encodeProtocol v = \case
     NEW NewQueueReq {rcvAuthKey = rKey, rcvDhKey = dhKey, auth_, subMode, queueReqData, ntfCreds}
       | v >= newNtfCredsSMPVersion -> new <> e (subMode, queueReqData, ntfCreds)
-      | otherwise -> new <> e (subMode, queueReqData)
+      | v >= shortLinksSMPVersion -> new <> e (subMode, queueReqData)
+      | otherwise -> new <> e (subMode, senderCanSecure (queueReqMode <$> queueReqData))
       where
         new = e (NEW_, ' ', rKey, dhKey, auth_)
     SUB -> e SUB_
@@ -1911,18 +1902,20 @@ instance ProtocolEncoding SMPVersion ErrorType Cmd where
     CT SCreator NEW_ -> Cmd SCreator <$> newCmd
       where
         newCmd
-          | v >= newNtfCredsSMPVersion = new smpP
-          | otherwise = new nothing
+          | v >= newNtfCredsSMPVersion = new smpP smpP
+          | v >= shortLinksSMPVersion = new smpP nothing
+          | otherwise = new (qReq <$> smpP) nothing
           where
             nothing = pure Nothing
-            new p3 = NEW <$> do
+            new p2 p3 = NEW <$> do
               rcvAuthKey <- _smpP
               rcvDhKey <- smpP
               auth_ <- smpP
               subMode <- smpP
-              queueReqData <- smpP
+              queueReqData <- p2
               ntfCreds <- p3
               pure NewQueueReq {rcvAuthKey, rcvDhKey, auth_, subMode, queueReqData, ntfCreds}
+            qReq sndSecure = Just $ if sndSecure then QRMessaging Nothing else QRContact Nothing
     CT SRecipient tag ->
       Cmd SRecipient <$> case tag of
         SUB_ -> pure SUB
@@ -1973,7 +1966,8 @@ instance ProtocolEncoding SMPVersion ErrorType BrokerMsg where
     IDS QIK {rcvId, sndId, rcvPublicDhKey = srvDh, queueMode, linkId, serviceId, serverNtfCreds}
       | v >= newNtfCredsSMPVersion -> ids <> e (queueMode, linkId, serviceId, serverNtfCreds)
       | v >= serviceCertsSMPVersion -> ids <> e (queueMode, linkId, serviceId)
-      | otherwise -> ids <> e (queueMode, linkId)
+      | v >= shortLinksSMPVersion -> ids <> e (queueMode, linkId)
+      | otherwise -> ids <> e (senderCanSecure queueMode)
       where
         ids = e (IDS_, ' ', rcvId, sndId, srvDh)
     LNK sId d -> e (LNK_, ' ', sId, d)
@@ -1987,8 +1981,8 @@ instance ProtocolEncoding SMPVersion ErrorType BrokerMsg where
     NID nId srvNtfDh -> e (NID_, ' ', nId, srvNtfDh)
     NMSG nmsgNonce encNMsgMeta -> e (NMSG_, ' ', nmsgNonce, encNMsgMeta)
     PKEY sid vr certKey -> e (PKEY_, ' ', sid, vr, certKey)
-    RRES nonce_ (EncFwdResponse encBlock) -> fwdResp RRES_ nonce_ encBlock
-    PRES nonce_ (EncResponse encBlock) -> fwdResp PRES_ nonce_ encBlock
+    RRES (EncFwdResponse encBlock) -> e (RRES_, ' ', Tail encBlock)
+    PRES (EncResponse encBlock) -> e (PRES_, ' ', Tail encBlock)
     END -> e END_
     ENDS n idsHash -> serviceResp ENDS_ n idsHash
     DELD -> e DELD_
@@ -2012,9 +2006,6 @@ instance ProtocolEncoding SMPVersion ErrorType BrokerMsg where
       serviceResp tag n idsHash
         | v >= rcvServiceSMPVersion = e (tag, ' ', n, idsHash)
         | otherwise = e (tag, ' ', n)
-      fwdResp tag nonce_ encBlock
-        | v >= fwdNoncesSMPVersion = e (tag, ' ', nonce_, Tail encBlock)
-        | otherwise = e (tag, ' ', Tail encBlock)
 
   protocolP v = \case
     MSG_ -> do
@@ -2024,17 +2015,19 @@ instance ProtocolEncoding SMPVersion ErrorType BrokerMsg where
         bodyP = EncRcvMsgBody . unTail <$> smpP
     ALLS_ -> pure ALLS
     IDS_
-      | v >= newNtfCredsSMPVersion -> ids smpP smpP
-      | v >= serviceCertsSMPVersion -> ids smpP nothing
-      | otherwise -> ids nothing nothing
+      | v >= newNtfCredsSMPVersion -> ids smpP smpP smpP smpP
+      | v >= serviceCertsSMPVersion -> ids smpP smpP smpP nothing
+      | v >= shortLinksSMPVersion -> ids smpP smpP nothing nothing
+      | otherwise -> ids (qm <$> smpP) nothing nothing nothing
       where
+        qm sndSecure = Just $ if sndSecure then QMMessaging else QMContact
         nothing = pure Nothing
-        ids p3 p4 = do
+        ids p1 p2 p3 p4 = do
           rcvId <- _smpP
           sndId <- smpP
           rcvPublicDhKey <- smpP
-          queueMode <- smpP
-          linkId <- smpP
+          queueMode <- p1
+          linkId <- p2
           serviceId <- p3
           serverNtfCreds <- p4
           pure $ IDS QIK {rcvId, sndId, rcvPublicDhKey, queueMode, linkId, serviceId, serverNtfCreds}
@@ -2044,8 +2037,8 @@ instance ProtocolEncoding SMPVersion ErrorType BrokerMsg where
     NID_ -> NID <$> _smpP <*> smpP
     NMSG_ -> NMSG <$> _smpP <*> smpP
     PKEY_ -> PKEY <$> _smpP <*> smpP <*> smpP
-    RRES_ -> fwdRespP RRES EncFwdResponse
-    PRES_ -> fwdRespP PRES EncResponse
+    RRES_ -> RRES <$> (EncFwdResponse . unTail <$> _smpP)
+    PRES_ -> PRES <$> (EncResponse . unTail <$> _smpP)
     END_ -> pure END
     ENDS_ -> serviceRespP ENDS
     DELD_ -> pure DELD
@@ -2062,9 +2055,6 @@ instance ProtocolEncoding SMPVersion ErrorType BrokerMsg where
       serviceRespP resp
         | v >= rcvServiceSMPVersion = resp <$> _smpP <*> smpP
         | otherwise = resp <$> _smpP <*> pure mempty
-      fwdRespP :: (Maybe C.CbNonce -> a -> BrokerMsg) -> (ByteString -> a) -> Parser BrokerMsg
-      fwdRespP resp enc = resp <$> (A.space *> nonceP) <*> (enc <$> A.takeByteString)
-      nonceP = if v >= fwdNoncesSMPVersion then smpP else pure Nothing
 
   fromProtocolError = \case
     PECmdSyntax -> CMD SYNTAX
@@ -2081,7 +2071,7 @@ instance ProtocolEncoding SMPVersion ErrorType BrokerMsg where
     -- PONG response must not have queue ID
     PONG -> noEntityMsg
     PKEY {} -> noEntityMsg
-    RRES {} -> noEntityMsg
+    RRES _ -> noEntityMsg
     ALLS -> noEntityMsg
     RNAME {} -> noEntityMsg
     -- other broker responses must have queue ID

src/Simplex/Messaging/Server.hs

@@ -98,12 +98,13 @@ import Network.Socket (ServiceName, Socket, socketToHandle)
 import qualified Network.TLS as TLS
 import Numeric.Natural (Natural)
 import Simplex.Messaging.Agent.Lock
-import Simplex.Messaging.Client (ProtocolClient (thParams), ProtocolClientError (..), SMPClient, SMPClientError, clientHandlers, forwardSMPTransmission, smpProxyError, temporaryClientError)
+import Simplex.Messaging.Client (ProtocolClient (thParams), ProtocolClientError (..), SMPClient, SMPClientError, clientHandlers, forwardSMPTransmission, smpProxyError, temporaryClientError, transportHost')
 import Simplex.Messaging.Client.Agent (OwnServer, SMPClientAgent (..), SMPClientAgentEvent (..), closeSMPClientAgent, getSMPServerClient'', isOwnServer, lookupSMPServerClient, getConnectedSMPServerClient)
 import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Encoding
 import Simplex.Messaging.Encoding.String
 import Simplex.Messaging.Protocol
+import Simplex.Messaging.Server.AddressStats (AddrStats, ServerAddrStats (..), addAddrCounter, addressStatsThread, incAddrCounter, printTopAddresses, withAddrStats)
 import Simplex.Messaging.Server.Control
 import Simplex.Messaging.Server.Env.STM as Env
 import Simplex.Messaging.Server.Expiration
@@ -124,6 +125,7 @@ import Simplex.Messaging.TMap (TMap)
 import qualified Simplex.Messaging.TMap as TM
 import Simplex.Messaging.Transport
 import Simplex.Messaging.Transport.Buffer (trimCR)
+import Simplex.Messaging.Transport.Client (TransportHost (..))
 import Simplex.Messaging.Transport.Server
 import Simplex.Messaging.Util
 import Simplex.Messaging.Version
@@ -199,6 +201,7 @@ smpServer started cfg@ServerConfig {transports, transportConfig = tCfg, startOpt
             <> expireMessagesThread_ cfg
             <> serverStatsThread_ cfg
             <> prometheusMetricsThread_ cfg
+            <> addressStatsThread_ cfg
             <> controlPortThread_ cfg
     )
     `finally` stopServer s
@@ -216,11 +219,12 @@ smpServer started cfg@ServerConfig {transports, transportConfig = tCfg, startOpt
           runTransportServerState_ ss started tcpPort defaultSupportedParamsHTTPS combinedCreds tCfg $ \s (sniUsed, h) ->
             case cast h of
               Just (TLS {tlsContext} :: TLS 'TServer) | sniUsed -> labelMyThread "https client" >> attachHTTP s tlsContext
-              _ -> runClient srvCert srvSignKey t h `runReaderT` env
+              _ -> runClient srvCert srvSignKey t s h `runReaderT` env
           where
             combinedCreds = TLSServerCredential {credential = smpCreds, sniCredential = Just httpCreds}
         _ ->
-          runTransportServerState ss started tcpPort defaultSupportedParams smpCreds tCfg $ \h -> runClient srvCert srvSignKey t h `runReaderT` env
+          runTransportServerState_ ss started tcpPort defaultSupportedParams TLSServerCredential {credential = smpCreds, sniCredential = Nothing} tCfg $ \s (_, h) ->
+            runClient srvCert srvSignKey t s h `runReaderT` env
 
     sigIntHandlerThread :: M s ()
     sigIntHandlerThread = do
@@ -515,6 +519,10 @@ smpServer started cfg@ServerConfig {transports, transportConfig = tCfg, startOpt
       [logServerStats logStatsStartTime interval serverStatsLogFile]
     serverStatsThread_ _ = []
 
+    addressStatsThread_ :: ServerConfig s -> [M s ()]
+    addressStatsThread_ ServerConfig {addressStats = Just statsCfg} = [asks addrStats >>= mapM_ (liftIO . addressStatsThread statsCfg)]
+    addressStatsThread_ _ = []
+
     logServerStats :: Int64 -> Int64 -> FilePath -> M s ()
     logServerStats startAt logInterval statsFilePath = do
       labelMyThread "logServerStats"
@@ -699,7 +707,7 @@ smpServer started cfg@ServerConfig {transports, transportConfig = tCfg, startOpt
       pure ServerMetrics {statsData = d, activeQueueCounts = ps, activeNtfCounts = psNtf, entityCounts, rtsOptions}
 
     getRealTimeMetrics :: Env s -> IO RealTimeMetrics
-    getRealTimeMetrics Env {sockets, msgStore_ = ms, server = srv@Server {subscribers, ntfSubscribers}} = do
+    getRealTimeMetrics Env {sockets, msgStore_ = ms, server = srv@Server {subscribers, ntfSubscribers}, addrStats} = do
       socketStats <- mapM (traverse getSocketStats) =<< readTVarIO sockets
 #if MIN_VERSION_base(4,18,0)
       threadsCount <- length <$> listThreads
@@ -711,7 +719,8 @@ smpServer started cfg@ServerConfig {transports, transportConfig = tCfg, startOpt
       smpSubs <- getSubscribersMetrics subscribers
       ntfSubs <- getSubscribersMetrics ntfSubscribers
       loadedCounts <- loadedQueueCounts $ fromMsgStore ms
-      pure RealTimeMetrics {socketStats, threadsCount, clientsCount, deliveredSubs, deliveredTimes, smpSubs, ntfSubs, loadedCounts}
+      addressHistograms <- mapM (readIORef . addrHistograms) addrStats
+      pure RealTimeMetrics {socketStats, threadsCount, clientsCount, deliveredSubs, deliveredTimes, smpSubs, ntfSubs, loadedCounts, addressHistograms}
       where
         getSubscribersMetrics ServerSubscribers {queueSubscribers, serviceSubscribers, totalServiceSubs, subClients} = do
           subsCount <- M.size <$> getSubscribedClients queueSubscribers
@@ -732,19 +741,21 @@ smpServer started cfg@ServerConfig {transports, transportConfig = tCfg, startOpt
                 Nothing -> acc
                 Just (_, ts) -> (cnt + 1, updateTimeBuckets ts ts' times)
 
-    runClient :: Transport c => X.CertificateChain -> C.APrivateSignKey -> TProxy c 'TServer -> c 'TServer -> M s ()
-    runClient srvCert srvSignKey tp h = do
-      ms <- asks msgStore
-      g <- asks random
-      idSize <- asks $ queueIdBytes . config
-      kh <- asks serverIdentity
-      ks <- atomically . C.generateKeyPair =<< asks random
-      ServerConfig {smpServerVRange, smpHandshakeTimeout, information} <- asks config
-      let serverInfo = LB.toStrict . J.encode <$> information
-      labelMyThread $ "smp handshake for " <> transportName tp
-      liftIO (timeout smpHandshakeTimeout . runExceptT $ smpServerHandshake srvCert srvSignKey h ks kh smpServerVRange serverInfo $ getClientService ms g idSize) >>= \case
-        Just (Right th) -> runClientTransport th
-        _ -> pure ()
+    runClient :: Transport c => X.CertificateChain -> C.APrivateSignKey -> TProxy c 'TServer -> Socket -> c 'TServer -> M s ()
+    runClient srvCert srvSignKey tp sock h = do
+      stats_ <- asks addrStats
+      withAddrStats (addrStatsMap <$> stats_) sock $ \addrStats_ -> do
+        ms <- asks msgStore
+        g <- asks random
+        idSize <- asks $ queueIdBytes . config
+        kh <- asks serverIdentity
+        ks <- atomically . C.generateKeyPair =<< asks random
+        ServerConfig {smpServerVRange, smpHandshakeTimeout, information} <- asks config
+        let serverInfo = LB.toStrict . J.encode <$> information
+        labelMyThread $ "smp handshake for " <> transportName tp
+        liftIO (timeout smpHandshakeTimeout . runExceptT $ smpServerHandshake srvCert srvSignKey h ks kh smpServerVRange serverInfo $ getClientService ms g idSize) >>= \case
+          Just (Right th) -> runClientTransport addrStats_ th
+          _ -> pure ()
 
     getClientService :: s -> TVar ChaChaDRG -> Int -> SMPServiceRole -> X.CertificateChain -> XV.Fingerprint -> ExceptT TransportError IO ServiceId
     getClientService ms g idSize role cert fp = do
@@ -1040,7 +1051,10 @@ smpServer started cfg@ServerConfig {transports, transportConfig = tCfg, startOpt
                 hPutStrLn h "saving server state..."
                 unliftIO u $ saveServer False
                 hPutStrLn h "server state saved!"
-              CPHelp -> hPutStrLn h "commands: stats, stats-rts, clients, sockets, socket-threads, threads, server-info, delete, save, help, quit"
+              CPAddresses name n_ -> withUserRole $ do
+                stats_ <- unliftIO u $ asks addrStats
+                printTopAddresses h (addrStatsMap <$> stats_) name n_
+              CPHelp -> hPutStrLn h "commands: stats, stats-rts, clients, sockets, socket-threads, threads, server-info, delete, addresses, save, help, quit"
               CPQuit -> pure ()
               CPSkip -> pure ()
               where
@@ -1061,13 +1075,13 @@ smpServer started cfg@ServerConfig {transports, transportConfig = tCfg, startOpt
                     logError "Unauthorized control port command"
                     hPutStrLn h "AUTH"
 
-runClientTransport :: forall c s. (Transport c, MsgStoreClass s) => THandleSMP c 'TServer -> M s ()
-runClientTransport h@THandle {params = thParams@THandleParams {sessionId}} = do
+runClientTransport :: forall c s. (Transport c, MsgStoreClass s) => Maybe (AddrStats SMPAddrCounter) -> THandleSMP c 'TServer -> M s ()
+runClientTransport addrStats_ h@THandle {params = thParams@THandleParams {sessionId}} = do
   q <- asks $ tbqSize . config
   ts <- liftIO getSystemTime
   nextClientId <- asks clientSeq
   clientId <- atomically $ stateTVar nextClientId $ \next -> (next, next + 1)
-  c <- liftIO $ newClient clientId q thParams ts
+  c <- liftIO $ newClient clientId q thParams ts addrStats_
   runClientThreads c `finally` clientDisconnected c
   where
     runClientThreads :: Client s -> M s ()
@@ -1092,7 +1106,6 @@ controlPortAuth h user admin role auth = do
   readTVarIO role >>= \case
     CPRNone -> do
       atomically $ writeTVar role $! newRole
-      when (newRole == CPRNone) $ logWarn "ControlPort: failed auth"
       hPutStrLn h $ currentRole newRole
     r -> hPutStrLn h $ currentRole r <> if r == newRole then "" else ", start new session to change."
   where
@@ -1145,7 +1158,7 @@ cancelSub s = case subThread s of
 type VerifiedTransmissionOrError s = Either (Transmission BrokerMsg) (VerifiedTransmission s)
 
 receive :: forall c s. (Transport c, MsgStoreClass s) => THandleSMP c 'TServer -> s -> Client s -> M s ()
-receive h@THandle {params = THandleParams {thAuth, sessionId}} ms Client {rcvQ, sndQ, rcvActiveAt} = do
+receive h@THandle {params = THandleParams {thAuth, sessionId}} ms Client {rcvQ, sndQ, rcvActiveAt, clientAddrStats} = do
   labelMyThread . B.unpack $ "client $" <> encode sessionId <> " receive"
   sa <- asks serverActive
   stats <- asks serverStats
@@ -1155,6 +1168,9 @@ receive h@THandle {params = THandleParams {thAuth, sessionId}} ms Client {rcvQ,
     atomically . (writeTVar rcvActiveAt $!) =<< getSystemTime
     let (es, ts') = partitionEithers $ L.toList ts
         errs = map (second ERR) es
+    forM_ clientAddrStats $ \s -> do
+      unless (null es) $ addAddrCounter s SACErrors $ length es
+      forM_ ts' $ \(_, _, (_, _, cmd)) -> incAddrCounter s $ smpCmdCounter cmd
     errs' <- case ts' of
       (_, _, (_, _, Cmd p cmd)) : rest -> do
         let service = peerClientService =<< thAuth
@@ -1182,7 +1198,9 @@ receive h@THandle {params = THandleParams {thAuth, sessionId}} ms Client {rcvQ,
     verified :: ServerStats -> SignedTransmission Cmd -> VerificationResult s -> IO (VerifiedTransmissionOrError s)
     verified stats (_, _, t@(corrId, entId, Cmd _ command)) = \case
       VRVerified q -> pure $ Right (q, t)
-      VRFailed e -> Left (corrId, entId, ERR e) <$ when (e == AUTH) incAuthStat
+      VRFailed e -> do
+        forM_ clientAddrStats (`incAddrCounter` SACErrors)
+        Left (corrId, entId, ERR e) <$ when (e == AUTH) incAuthStat
         where
           incAuthStat = case command of
             SEND {} -> incStat $ msgSentAuth stats
@@ -1319,6 +1337,11 @@ isContactQueue QueueRec {queueMode, senderKey} = case queueMode of
   Just QMContact -> True
   Nothing -> isNothing senderKey -- for backward compatibility with pre-SKEY contact addresses
 
+isSecuredMsgQueue :: QueueRec -> Bool
+isSecuredMsgQueue QueueRec {queueMode, senderKey} = case queueMode of
+  Just QMContact -> False
+  _ -> isJust senderKey
+
 -- Random correlation ID is used as a nonce in case crypto_box authenticator is used to authorize transmission
 verifyCmdAuthorization :: Maybe (THandleAuth 'TServer) -> Maybe TAuthorizations -> ByteString -> CorrId -> C.APublicAuthKey -> Bool
 verifyCmdAuthorization thAuth tAuth authorized corrId key = maybe False (verify key) tAuth
@@ -1372,7 +1395,7 @@ client :: forall s. MsgStoreClass s => Server s -> s -> Client s -> M s ()
 client
   Server {subscribers, ntfSubscribers}
   ms
-  clnt@Client {clientId, rcvQ, sndQ, msgQ, clientTHParams = thParams'@THandleParams {sessionId}, procThreads} = do
+  clnt@Client {clientId, rcvQ, sndQ, msgQ, clientTHParams = thParams'@THandleParams {sessionId}, procThreads, clientAddrStats} = do
     labelMyThread . B.unpack $ "client $" <> encode sessionId <> " commands"
     let clntServiceId = (\THClientService {serviceId} -> serviceId) <$> (peerClientService =<< thAuth thParams')
         process batchSubs t acc@(rs, msgs) =
@@ -1417,25 +1440,30 @@ client
           getRelay = do
             ProxyAgent {smpAgent = a} <- asks proxyAgent
             liftIO (getConnectedSMPServerClient a srv) >>= \case
-              Just r -> Just <$> proxyServerResponse a r
+              Just r -> Just <$> proxyServerResponse a SACPrxyConnected r
               Nothing ->
                 forkProxiedCmd $
                   liftIO (runExceptT (getSMPServerClient'' a srv) `E.catches` clientHandlers)
-                    >>= proxyServerResponse a
-          proxyServerResponse :: SMPClientAgent 'Sender -> Either SMPClientError (OwnServer, SMPClient) -> M s BrokerMsg
-          proxyServerResponse a smp_ = do
+                    >>= proxyServerResponse a SACPrxyNew
+          proxyServerResponse :: SMPClientAgent 'Sender -> SMPAddrCounter -> Either SMPClientError (OwnServer, SMPClient) -> M s BrokerMsg
+          proxyServerResponse a otherCounter smp_ = do
             ServerStats {pRelays, pRelaysOwn} <- asks serverStats
             let inc = mkIncProxyStats pRelays pRelaysOwn
             case smp_ of
               Right (own, smp) -> do
                 inc own pRequests
                 case proxyResp smp of
-                  r@PKEY {} -> r <$ inc own pSuccesses
-                  r -> r <$ inc own pErrorsCompat
+                  r@PKEY {} -> do
+                    incAddrStats $ proxyDestCounter own smp SACPrxyOwn SACPrxyOnion otherCounter
+                    r <$ inc own pSuccesses
+                  r -> do
+                    incAddrStats SACPrxyFailed
+                    r <$ inc own pErrorsCompat
               Left e -> do
                 let own = isOwnServer a srv
                 inc own pRequests
                 inc own $ if temporaryClientError e then pErrorsConnect else pErrorsOther
+                incAddrStats SACPrxyFailed
                 logWarn $ "Error connecting: " <> decodeLatin1 (strEncode $ host srv) <> " " <> tshow e
                 pure . ERR $ smpProxyError e
             where
@@ -1455,16 +1483,24 @@ client
         liftIO (lookupSMPServerClient a sessId) >>= \case
           Just (own, smp) -> do
             inc own pRequests
+            let delivered = incAddrStats (proxyDestCounter own smp SACPfwdOwn SACPfwdOnion SACPfwdOther) >> inc own pSuccesses
             forkProxiedCmd $ do
               liftIO (runExceptT (forwardSMPTransmission smp corrId fwdV pubKey encBlock) `E.catches` clientHandlers)  >>= \case
-                Right (nonce_, r) -> PRES nonce_ r <$ inc own pSuccesses
+                Right r -> PRES r <$ delivered
                 Left e -> ERR (smpProxyError e) <$ case e of
-                  PCEProtocolError {} -> inc own pSuccesses
-                  _ -> inc own pErrorsOther
-          Nothing -> inc False pRequests >> inc False pErrorsConnect $> Just (ERR $ PROXY NO_SESSION)
+                  PCEProtocolError {} -> delivered
+                  _ -> incAddrStats SACPfwdFailed >> inc own pErrorsOther
+          Nothing -> incAddrStats SACPfwdFailed >> inc False pRequests >> inc False pErrorsConnect $> Just (ERR $ PROXY NO_SESSION)
       where
         forkProxiedCmd :: M s BrokerMsg -> M s (Maybe BrokerMsg)
         forkProxiedCmd = forkCmd serverClientConcurrency corrId (EntityId sessId)
+        proxyDestCounter :: OwnServer -> SMPClient -> SMPAddrCounter -> SMPAddrCounter -> SMPAddrCounter -> SMPAddrCounter
+        proxyDestCounter own smp ownCounter onionCounter otherCounter
+          | own = ownCounter
+          | THOnionHost _ <- transportHost' smp = onionCounter
+          | otherwise = otherCounter
+    incAddrStats :: SMPAddrCounter -> M s ()
+    incAddrStats c = liftIO $ forM_ clientAddrStats (`incAddrCounter` c)
     -- Run a slow command on a thread
     forkCmd :: (ServerConfig s -> Int) -> CorrId -> EntityId -> M s BrokerMsg -> M s (Maybe a)
     forkCmd concurrency corrId entId cmdAction = do
@@ -2123,10 +2159,9 @@ client
           let proxyNonce = C.cbNonce $ bs corrId
           s' <- liftEitherWith (const CRYPTO) $ C.cbDecryptNoPad sessSecret proxyNonce s
           FwdTransmission {fwdCorrId, fwdVersion, fwdKey, fwdTransmission = EncTransmission et} <- liftEitherWith (const $ CMD SYNTAX) $ smpDecode s'
-          unless (fwdVersion `isCompatible` thServerVRange thParams') $ throwE $ transportErr TEVersion
           let clientSecret = C.dh' fwdKey serverPrivKey
               clientNonce = C.cbNonce $ bs fwdCorrId
-          b <- liftEitherWith (const CRYPTO) $ C.cbDecrypt clientSecret (encTransmissionNonce fwdVersion clientNonce) et
+          b <- liftEitherWith (const CRYPTO) $ C.cbDecrypt clientSecret clientNonce et
           let clntTHParams = smpTHParamsSetVersion fwdVersion thParams'
           -- only allowing single forwarded transactions
           t' <- case tParse clntTHParams b of
@@ -2139,13 +2174,9 @@ client
                   TBError _ _ : _ -> throwE BLOCK
                   TBTransmission b' _ : _ -> pure b'
                   TBTransmissions b' _ _ : _ -> pure b'
-                nonce_ <-
-                  if fwdVersion >= fwdNoncesSMPVersion
-                    then Just <$> (atomically . C.randomCbNonce =<< asks random)
-                    else pure Nothing
-                r2 <- liftEitherWith (const BLOCK) $ EncResponse <$> C.cbEncrypt clientSecret (fromMaybe (C.reverseNonce clientNonce) nonce_) r' paddedProxiedTLength
+                r2 <- liftEitherWith (const BLOCK) $ EncResponse <$> C.cbEncrypt clientSecret (C.reverseNonce clientNonce) r' paddedProxiedTLength
                 let fr = FwdResponse {fwdCorrId, fwdResponse = r2}
-                pure $ RRES nonce_ $ EncFwdResponse $ C.cbEncryptNoPad sessSecret (C.reverseNonce proxyNonce) (smpEncode fr)
+                pure $ RRES $ EncFwdResponse $ C.cbEncryptNoPad sessSecret (C.reverseNonce proxyNonce) (smpEncode fr)
           -- the inner response, or Nothing if forked (RSLV).
           r_ <- lift (rejectOrVerify clntThAuth t') >>= \case
             -- rejectOrVerify filters allowed commands, no need to repeat it here.

src/Simplex/Messaging/Server/AddressStats.hs

@@ -0,0 +1,250 @@
+{-# LANGUAGE LambdaCase #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE TupleSections #-}
+
+module Simplex.Messaging.Server.AddressStats
+  ( AddrKey (..),
+    AddrCounter (..),
+    AddrStats (..),
+    AddrStatsMap,
+    AddrHistogram (..),
+    ServerAddrStats (..),
+    AddressStatsConfig (..),
+    defaultAddressStatsPeriod,
+    countBounds,
+    kilobyteBounds,
+    addrKey,
+    addrKeyText,
+    counterByName,
+    newServerAddrStats,
+    withAddrStats,
+    openAddrStats,
+    closeAddrStats,
+    incAddrCounter,
+    addAddrCounter,
+    rolloverAddrStats,
+    addressStatsThread,
+    topAddresses,
+    printTopAddresses,
+    addressesArgsP,
+    addressesArgs,
+    addrHistogramMetrics,
+  )
+where
+
+import Control.Applicative (optional)
+import Control.Monad
+import Control.Monad.IO.Unlift
+import qualified Data.Attoparsec.ByteString.Char8 as A
+import Data.Bits (shiftL, shiftR, (.&.), (.|.))
+import Data.ByteString.Char8 (ByteString)
+import Data.IORef
+import Data.Int (Int64)
+import qualified Data.IntMap.Strict as IM
+import Data.List (find, foldl', sortOn)
+import Data.Map.Strict (Map)
+import qualified Data.Map.Strict as M
+import Data.Maybe (fromMaybe)
+import Data.Ord (Down (..))
+import Data.Text (Text)
+import qualified Data.Text as T
+import Data.Text.Encoding (encodeUtf8)
+import qualified Data.Text.IO as T
+import Data.Word (Word32, Word64)
+import Network.Socket (SockAddr (..), Socket, getPeerName, hostAddress6ToTuple, hostAddressToTuple)
+import Numeric (showHex)
+import Simplex.Messaging.TMap (TMap)
+import qualified Simplex.Messaging.TMap as TM
+import Simplex.Messaging.Util (atomicModifyIORef'_, bshow, labelMyThread, safeDecodeUtf8, threadDelay', tshow, whenM, (<$$>))
+import System.IO (Handle, hPutStrLn)
+import UnliftIO.Exception (finally, tryAny)
+import UnliftIO.STM
+
+data AddrKey
+  = AKIPv4 Word32
+  | AKIPv6 Word64
+  deriving (Eq, Ord, Show)
+
+class (Ord c, Enum c, Bounded c) => AddrCounter c where
+  counterName :: c -> Text
+  counterBounds :: c -> [Int]
+  counterBounds _ = countBounds
+  connectionsCounter :: c
+
+data AddrStats c = AddrStats
+  { connectionsCount :: TVar Int,
+    current :: Map c (IORef Int),
+    previous :: Map c (IORef Int)
+  }
+
+type AddrStatsMap c = TMap AddrKey (AddrStats c)
+
+data AddrHistogram = AddrHistogram
+  { bucketCounts :: [Int],
+    countSum :: Int,
+    addressCount :: Int,
+    periodMax :: Int
+  }
+  deriving (Eq, Show)
+
+data ServerAddrStats c = ServerAddrStats
+  { addrStatsMap :: AddrStatsMap c,
+    addrHistograms :: IORef (Map c AddrHistogram)
+  }
+
+newtype AddressStatsConfig = AddressStatsConfig
+  { period :: Int64
+  }
+  deriving (Show)
+
+defaultAddressStatsPeriod :: Int64
+defaultAddressStatsPeriod = 300
+
+countBounds :: [Int]
+countBounds = r10Bounds 5
+
+kilobyteBounds :: [Int]
+kilobyteBounds = r10Bounds 7
+
+r10Bounds :: Int -> [Int]
+r10Bounds decades =
+  [1 .. 9]
+    <> [(r * 10 ^ d + 50) `div` 100 | d <- [1 .. decades], r <- [100, 125, 160, 200, 250, 315, 400, 500, 630, 800]]
+    <> [10 ^ (decades + 1)]
+
+addrKey :: SockAddr -> Maybe AddrKey
+addrKey = \case
+  SockAddrInet _ a ->
+    let (b1, b2, b3, b4) = hostAddressToTuple a
+     in Just $ AKIPv4 $ foldl' (\acc b -> acc `shiftL` 8 .|. fromIntegral b) 0 [b1, b2, b3, b4]
+  SockAddrInet6 _ _ a _ -> Just $ case hostAddress6ToTuple a of
+    (0, 0, 0, 0, 0, 0xffff, w1, w2) -> AKIPv4 $ fromIntegral w1 `shiftL` 16 .|. fromIntegral w2
+    (w1, w2, w3, w4, _, _, _, _) -> AKIPv6 $ foldl' (\acc w -> acc `shiftL` 16 .|. fromIntegral w) 0 [w1, w2, w3, w4]
+  _ -> Nothing
+
+addrKeyText :: AddrKey -> Text
+addrKeyText = \case
+  AKIPv4 a -> T.intercalate "." $ map (\s -> tshow $ (a `shiftR` s) .&. 0xff) [24, 16, 8, 0]
+  AKIPv6 p -> T.intercalate ":" (map (\s -> T.pack $ showHex ((p `shiftR` s) .&. 0xffff) "") [48, 32, 16, 0]) <> "::/64"
+
+counterByName :: AddrCounter c => Text -> Maybe c
+counterByName name = find ((name ==) . counterName) [minBound .. maxBound]
+
+newServerAddrStats :: AddrCounter c => IO (ServerAddrStats c)
+newServerAddrStats = ServerAddrStats <$> TM.emptyIO <*> newIORef (M.fromList $ map (\c -> (c, emptyHistogram c)) [minBound .. maxBound])
+  where
+    emptyHistogram c = AddrHistogram {bucketCounts = map (const 0) (counterBounds c), countSum = 0, addressCount = 0, periodMax = 0}
+
+newAddrStats :: AddrCounter c => IO (AddrStats c)
+newAddrStats = AddrStats <$> newTVarIO 0 <*> newCells <*> newCells
+  where
+    newCells = M.fromList <$> mapM (\c -> (c,) <$> newIORef 0) [minBound .. maxBound]
+
+withAddrStats :: (AddrCounter c, MonadUnliftIO m) => Maybe (AddrStatsMap c) -> Socket -> (Maybe (AddrStats c) -> m a) -> m a
+withAddrStats m_ sock action = case m_ of
+  Just m ->
+    liftIO (addrKey <$$> tryAny (getPeerName sock)) >>= \case
+      Right (Just k) -> do
+        s <- liftIO $ openAddrStats m k
+        action (Just s) `finally` liftIO (closeAddrStats s)
+      _ -> action Nothing
+  Nothing -> action Nothing
+
+openAddrStats :: AddrCounter c => AddrStatsMap c -> AddrKey -> IO (AddrStats c)
+openAddrStats m k = do
+  new <- maybe newAddrStats pure =<< TM.lookupIO k m
+  s <- atomically $ TM.lookup k m >>= maybe (new <$ TM.insert k new m) pure >>= \entry -> entry <$ modifyTVar' (connectionsCount entry) (+ 1)
+  s <$ incAddrCounter s connectionsCounter
+
+closeAddrStats :: AddrStats c -> IO ()
+closeAddrStats AddrStats {connectionsCount} = atomically $ modifyTVar' connectionsCount (subtract 1)
+
+incAddrCounter :: AddrCounter c => AddrStats c -> c -> IO ()
+incAddrCounter s c = addAddrCounter s c 1
+
+addAddrCounter :: AddrCounter c => AddrStats c -> c -> Int -> IO ()
+addAddrCounter AddrStats {current} c n = forM_ (M.lookup c current) $ \cell -> atomicModifyIORef'_ cell (+ n)
+
+rolloverAddrStats :: AddrCounter c => ServerAddrStats c -> IO ()
+rolloverAddrStats ServerAddrStats {addrStatsMap, addrHistograms} = do
+  entries <- M.toList <$> readTVarIO addrStatsMap
+  closingCounts <- forM entries $ \(k, s) -> do
+    counts <- closePeriod s
+    when (all (== 0) counts) $ atomically $ deleteIdle k s
+    pure counts
+  let periodCounts = M.unionsWith (<>) $ map (M.map (: []) . M.filter (> 0)) closingCounts
+  atomicModifyIORef'_ addrHistograms $ M.mapWithKey $ \c -> addPeriodCounts (counterBounds c) (M.findWithDefault [] c periodCounts)
+  where
+    closePeriod AddrStats {current, previous} = M.traverseWithKey closeCell current
+      where
+        closeCell c cell = do
+          n <- atomicModifyIORef' cell (0,)
+          forM_ (M.lookup c previous) (`writeIORef` n)
+          pure n
+    deleteIdle k AddrStats {connectionsCount} =
+      whenM ((0 ==) <$> readTVar connectionsCount) $ TM.delete k addrStatsMap
+
+addPeriodCounts :: [Int] -> [Int] -> AddrHistogram -> AddrHistogram
+addPeriodCounts bounds ns AddrHistogram {bucketCounts, countSum, addressCount} =
+  AddrHistogram
+    { bucketCounts = zipWith (+) bucketCounts $ scanl1 (+) $ map (\i -> IM.findWithDefault 0 i boundCounts) [0 .. length bounds - 1],
+      countSum = countSum + sum ns,
+      addressCount = addressCount + length ns,
+      periodMax = maximum (0 : ns)
+    }
+  where
+    boundCounts = IM.fromListWith (+) $ map (\n -> (length $ takeWhile (< n) bounds, 1)) ns
+
+addressStatsThread :: AddrCounter c => AddressStatsConfig -> ServerAddrStats c -> IO ()
+addressStatsThread AddressStatsConfig {period} stats = do
+  labelMyThread "addressStatsThread"
+  forever $ threadDelay' (period * 1000000) >> rolloverAddrStats stats
+
+topAddresses :: AddrCounter c => AddrStatsMap c -> c -> Int -> IO [(AddrKey, Int, Int)]
+topAddresses m c n = do
+  entries <- M.toList <$> readTVarIO m
+  counts <- forM entries $ \(k, AddrStats {previous, current}) -> (k,,) <$> cellValue previous <*> cellValue current
+  pure $ take n $ sortOn (\(_, p, cur) -> Down (p + cur)) $ filter (\(_, p, cur) -> p + cur > 0) counts
+  where
+    cellValue = maybe (pure 0) readIORef . M.lookup c
+
+printTopAddresses :: AddrCounter c => Handle -> Maybe (AddrStatsMap c) -> Text -> Maybe Int -> IO ()
+printTopAddresses h m_ name n_ = case m_ of
+  Just m -> case counterByName name of
+    Just c -> do
+      rows <- topAddresses m c (fromMaybe 10 n_)
+      hPutStrLn h "address,previous,current"
+      forM_ rows $ \(k, p, cur) -> T.hPutStrLn h $ addrKeyText k <> "," <> tshow p <> "," <> tshow cur
+    Nothing -> hPutStrLn h "error: unknown counter"
+  Nothing -> hPutStrLn h "error: address statistics are off"
+
+addressesArgsP :: A.Parser (Text, Maybe Int)
+addressesArgsP = (,) <$> (A.space *> (safeDecodeUtf8 <$> A.takeTill (== ' '))) <*> optional (A.space *> A.decimal)
+
+addressesArgs :: Text -> Maybe Int -> ByteString
+addressesArgs name n_ = encodeUtf8 name <> maybe "" ((" " <>) . bshow) n_
+
+addrHistogramMetrics :: AddrCounter c => Text -> Text -> Map c AddrHistogram -> Text
+addrHistogramMetrics prefix tsEpoch histograms =
+  "# Client addresses\n\
+  \# ----------------\n\
+  \\n"
+    <> "# HELP " <> countMetric <> " Counts of client addresses per period\n"
+    <> "# TYPE " <> countMetric <> " histogram\n"
+    <> T.concat (map countLines hs)
+    <> "\n# HELP " <> maxMetric <> " Maximum count of a client address in the last period\n"
+    <> "# TYPE " <> maxMetric <> " gauge\n"
+    <> T.concat (map (\(c, AddrHistogram {periodMax}) -> sample maxMetric c [] periodMax) hs)
+    <> "\n"
+  where
+    hs = M.toList histograms
+    countMetric = prefix <> "_client_address_period_count"
+    maxMetric = prefix <> "_client_address_period_max"
+    countLines (c, AddrHistogram {bucketCounts, countSum, addressCount}) =
+      T.concat (zipWith (\b cnt -> sample (countMetric <> "_bucket") c [("le", tshow b)] cnt) (counterBounds c) bucketCounts)
+        <> sample (countMetric <> "_bucket") c [("le", "+Inf")] addressCount
+        <> sample (countMetric <> "_sum") c [] countSum
+        <> sample (countMetric <> "_count") c [] addressCount
+    sample metric c labels v =
+      metric <> "{" <> T.intercalate "," (map (\(l, lv) -> l <> "=\"" <> lv <> "\"") (("counter", counterName c) : labels)) <> "} " <> tshow v <> " " <> tsEpoch <> "\n"

src/Simplex/Messaging/Server/CLI.hs

@@ -44,6 +44,8 @@ module Simplex.Messaging.Server.CLI
     checkSavedFingerprint,
     iniTransports,
     iniDBOptions,
+    iniAddressStats,
+    addressStatsIniContent,
     printServerConfig,
     printServerTransports,
     printSMPServerConfig,
@@ -73,13 +75,14 @@ import Simplex.Messaging.Agent.Store.Postgres.Options (DBOpts (..))
 import Simplex.Messaging.Agent.Store.Shared (MigrationConfirmation (..))
 import Simplex.Messaging.Encoding.String
 import Simplex.Messaging.Protocol (ProtoServerWithAuth (..), ProtocolServer (..), ProtocolTypeI)
+import Simplex.Messaging.Server.AddressStats (AddressStatsConfig (..), defaultAddressStatsPeriod)
 import Simplex.Messaging.Server.Env.STM (ServerStoreCfg (..), StartOptions (..), dbStoreCfg, storeLogFile')
 import Simplex.Messaging.Server.Main.GitCommit
 import Simplex.Messaging.Server.QueueStore.Postgres.Config (PostgresStoreCfg (..))
 import Simplex.Messaging.Transport (ASrvTransport, ATransport (..), TLS, Transport (..), simplexMQVersion)
 import Simplex.Messaging.Transport.Server (AddHTTP, loadFileFingerprint)
 import Simplex.Messaging.Transport.WebSockets (WS)
-import Simplex.Messaging.Util (eitherToMaybe, whenM)
+import Simplex.Messaging.Util (eitherToMaybe, tshow, whenM)
 import System.Directory (doesDirectoryExist, listDirectory, removeDirectoryRecursive, removePathForcibly)
 import System.Environment (lookupEnv)
 import System.Exit (exitFailure)
@@ -435,6 +438,19 @@ iniDBOptions ini _default@DBOpts {connstr, schema, poolSize} =
       createSchema = False
     }
 
+iniAddressStats :: Ini -> Maybe AddressStatsConfig
+iniAddressStats ini =
+  AddressStatsConfig {period = readIniDefault defaultAddressStatsPeriod "ADDRESS_STATS" "period" ini}
+    <$ settingIsOn "ADDRESS_STATS" "enable" ini
+
+addressStatsIniContent :: Text
+addressStatsIniContent =
+  "[ADDRESS_STATS]\n\
+  \# Command counts per client address, shown by the control port command `addresses`\n\
+  \# and aggregated in Prometheus metrics.\n\
+  \enable = off\n"
+    <> ("period = " <> tshow defaultAddressStatsPeriod <> "\n")
+
 printServerConfig :: String -> [(ServiceName, ASrvTransport, AddHTTP)] -> Maybe FilePath -> IO ()
 printServerConfig protocol transports logFile = do
   putStrLn $ case logFile of

src/Simplex/Messaging/Server/Control.hs

@@ -7,8 +7,10 @@ module Simplex.Messaging.Server.Control
   ) where
 
 import qualified Data.Attoparsec.ByteString.Char8 as A
+import Data.Text (Text)
 import Simplex.Messaging.Encoding.String
 import Simplex.Messaging.Protocol (BasicAuth, BlockingInfo, SenderId)
+import Simplex.Messaging.Server.AddressStats (addressesArgs, addressesArgsP)
 
 data CPClientRole = CPRNone | CPRUser | CPRAdmin
   deriving (Eq, Show)
@@ -28,6 +30,7 @@ data ControlProtocol
   | CPStatus SenderId
   | CPBlock SenderId BlockingInfo
   | CPUnblock SenderId
+  | CPAddresses Text (Maybe Int)
   | CPSave
   | CPHelp
   | CPQuit
@@ -49,6 +52,7 @@ instance StrEncoding ControlProtocol where
     CPStatus sId -> "status " <> strEncode sId
     CPBlock sId info -> "block " <> strEncode sId <> " " <> strEncode info
     CPUnblock sId -> "unblock " <> strEncode sId
+    CPAddresses name n_ -> "addresses " <> addressesArgs name n_
     CPSave -> "save"
     CPHelp -> "help"
     CPQuit -> "quit"
@@ -69,6 +73,7 @@ instance StrEncoding ControlProtocol where
       "status" -> CPStatus <$> _strP
       "block" -> CPBlock <$> _strP <*> _strP
       "unblock" -> CPUnblock <$> _strP
+      "addresses" -> uncurry CPAddresses <$> addressesArgsP
       "save" -> pure CPSave
       "help" -> pure CPHelp
       "quit" -> pure CPQuit

src/Simplex/Messaging/Server/Env/STM.hs

@@ -31,6 +31,8 @@ module Simplex.Messaging.Server.Env.STM
     SubscribedClients,
     ProxyAgent (..),
     Client (..),
+    SMPAddrCounter (..),
+    smpCmdCounter,
     ClientId,
     ClientSub (..),
     Sub (..),
@@ -111,6 +113,7 @@ import Simplex.Messaging.Client.Agent (SMPClientAgent, SMPClientAgentConfig, new
 import Simplex.Messaging.Crypto (KeyHash (..))
 import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Protocol
+import Simplex.Messaging.Server.AddressStats (AddrCounter (..), AddrStats, AddressStatsConfig, ServerAddrStats, newServerAddrStats)
 import Simplex.Messaging.Server.Expiration
 import Simplex.Messaging.Server.Information
 import Simplex.Messaging.Server.MsgStore.Journal
@@ -183,6 +186,7 @@ data ServerConfig s = ServerConfig
     -- | interval and file to save prometheus metrics
     prometheusInterval :: Maybe Int,
     prometheusMetricsFile :: FilePath,
+    addressStats :: Maybe AddressStatsConfig,
     -- | notification delivery interval
     ntfDeliveryInterval :: Int,
     -- | interval between sending pending END events to unsubscribed clients, seconds
@@ -285,7 +289,8 @@ data Env s = Env
     sockets :: TVar [(ServiceName, SocketState)],
     clientSeq :: TVar ClientId,
     proxyAgent :: ProxyAgent, -- senders served on this proxy
-    namesEnv :: Maybe NamesEnv -- public-namespace resolver, present when [NAMES] enable: on
+    namesEnv :: Maybe NamesEnv, -- public-namespace resolver, present when [NAMES] enable: on
+    addrStats :: Maybe (ServerAddrStats SMPAddrCounter)
   }
 
 msgStore :: Env s -> s
@@ -465,9 +470,117 @@ data Client s = Client
     connected :: TVar Bool,
     createdAt :: SystemTime,
     rcvActiveAt :: TVar SystemTime,
-    sndActiveAt :: TVar SystemTime
+    sndActiveAt :: TVar SystemTime,
+    clientAddrStats :: Maybe (AddrStats SMPAddrCounter)
   }
 
+data SMPAddrCounter
+  = SACConnections
+  | SACErrors
+  | SACNew
+  | SACSub
+  | SACSubs
+  | SACKey
+  | SACRKey
+  | SACLSet
+  | SACLDel
+  | SACNKey
+  | SACNDel
+  | SACGet
+  | SACAck
+  | SACOff
+  | SACDel
+  | SACQue
+  | SACSKey
+  | SACSend
+  | SACPing
+  | SACLKey
+  | SACLGet
+  | SACNSub
+  | SACNSubs
+  | SACPrxy
+  | SACPfwd
+  | SACRfwd
+  | SACRslv
+  | SACPrxyOwn
+  | SACPrxyConnected
+  | SACPrxyNew
+  | SACPrxyOnion
+  | SACPrxyFailed
+  | SACPfwdOwn
+  | SACPfwdOther
+  | SACPfwdOnion
+  | SACPfwdFailed
+  deriving (Eq, Ord, Enum, Bounded, Show)
+
+instance AddrCounter SMPAddrCounter where
+  counterName = \case
+    SACConnections -> "connections"
+    SACErrors -> "errors"
+    SACNew -> "NEW"
+    SACSub -> "SUB"
+    SACSubs -> "SUBS"
+    SACKey -> "KEY"
+    SACRKey -> "RKEY"
+    SACLSet -> "LSET"
+    SACLDel -> "LDEL"
+    SACNKey -> "NKEY"
+    SACNDel -> "NDEL"
+    SACGet -> "GET"
+    SACAck -> "ACK"
+    SACOff -> "OFF"
+    SACDel -> "DEL"
+    SACQue -> "QUE"
+    SACSKey -> "SKEY"
+    SACSend -> "SEND"
+    SACPing -> "PING"
+    SACLKey -> "LKEY"
+    SACLGet -> "LGET"
+    SACNSub -> "NSUB"
+    SACNSubs -> "NSUBS"
+    SACPrxy -> "PRXY"
+    SACPfwd -> "PFWD"
+    SACRfwd -> "RFWD"
+    SACRslv -> "RSLV"
+    SACPrxyOwn -> "PRXY_own"
+    SACPrxyConnected -> "PRXY_connected"
+    SACPrxyNew -> "PRXY_new"
+    SACPrxyOnion -> "PRXY_onion"
+    SACPrxyFailed -> "PRXY_failed"
+    SACPfwdOwn -> "PFWD_own"
+    SACPfwdOther -> "PFWD_other"
+    SACPfwdOnion -> "PFWD_onion"
+    SACPfwdFailed -> "PFWD_failed"
+  connectionsCounter = SACConnections
+
+smpCmdCounter :: Cmd -> SMPAddrCounter
+smpCmdCounter (Cmd _ cmd) = case cmd of
+  NEW _ -> SACNew
+  SUB -> SACSub
+  SUBS {} -> SACSubs
+  KEY _ -> SACKey
+  RKEY _ -> SACRKey
+  LSET {} -> SACLSet
+  LDEL -> SACLDel
+  NKEY {} -> SACNKey
+  NDEL -> SACNDel
+  GET -> SACGet
+  ACK _ -> SACAck
+  OFF -> SACOff
+  DEL -> SACDel
+  QUE -> SACQue
+  SKEY _ -> SACSKey
+  SEND {} -> SACSend
+  PING -> SACPing
+  LKEY _ -> SACLKey
+  LGET -> SACLGet
+  NSUB -> SACNSub
+  NSUBS {} -> SACNSubs
+  PRXY {} -> SACPrxy
+  PFWD {} -> SACPfwd
+  RFWD _ -> SACRfwd
+  RSLV _ -> SACRslv
+
 type VerifiedTransmission s = (Maybe (StoreQueue s, QueueRec), Transmission Cmd)
 
 type ResponseAndMessage = (Transmission BrokerMsg, Maybe (Transmission BrokerMsg))
@@ -520,8 +633,8 @@ newServerSubscribers = do
   pendingEvents <- newTVarIO IM.empty
   pure ServerSubscribers {subQ, queueSubscribers, serviceSubscribers, totalServiceSubs, subClients, pendingEvents}
 
-newClient :: ClientId -> Natural -> THandleParams SMPVersion 'TServer -> SystemTime -> IO (Client s)
-newClient clientId qSize clientTHParams createdAt = do
+newClient :: ClientId -> Natural -> THandleParams SMPVersion 'TServer -> SystemTime -> Maybe (AddrStats SMPAddrCounter) -> IO (Client s)
+newClient clientId qSize clientTHParams createdAt clientAddrStats = do
   subscriptions <- TM.emptyIO
   ntfSubscriptions <- TM.emptyIO
   serviceSubscribed <- newTVarIO False
@@ -556,7 +669,8 @@ newClient clientId qSize clientTHParams createdAt = do
         connected,
         createdAt,
         rcvActiveAt,
-        sndActiveAt
+        sndActiveAt,
+        clientAddrStats
       }
 
 newSubscription :: SubscriptionThread -> STM Sub
@@ -571,7 +685,7 @@ newProhibitedSub = do
   return Sub {subThread = ProhibitSub, delivered}
 
 newEnv :: ServerConfig s -> IO (Env s)
-newEnv config@ServerConfig {smpCredentials, httpCredentials, serverStoreCfg, smpAgentCfg, information, messageExpiration, idleQueueInterval, msgQueueQuota, maxJournalMsgCount, maxJournalStateLines, namesConfig} = do
+newEnv config@ServerConfig {smpCredentials, httpCredentials, serverStoreCfg, smpAgentCfg, information, messageExpiration, idleQueueInterval, msgQueueQuota, maxJournalMsgCount, maxJournalStateLines, namesConfig, addressStats} = do
   serverActive <- newTVarIO True
   server <- newServer
   msgStore_ <- case serverStoreCfg of
@@ -626,6 +740,7 @@ newEnv config@ServerConfig {smpCredentials, httpCredentials, serverStoreCfg, smp
       Right _ -> logInfo "[NAMES] endpoint probe ok"
       Left e -> logWarn $ "[NAMES] endpoint probe failed (server will still start, RSLV will return ERR (NAME ...) until reachable): " <> tshow e
     pure env
+  addrStats <- mapM (const newServerAddrStats) addressStats
   pure
     Env
       { serverActive,
@@ -642,7 +757,8 @@ newEnv config@ServerConfig {smpCredentials, httpCredentials, serverStoreCfg, smp
         sockets,
         clientSeq,
         proxyAgent,
-        namesEnv
+        namesEnv,
+        addrStats
       }
   where
     loadStoreLog :: StoreQueueClass q => (RecipientId -> QueueRec -> IO q) -> FilePath -> STMQueueStore q -> IO ()

src/Simplex/Messaging/Server/Main.hs

@@ -578,6 +578,7 @@ smpServerCLI_ generateSite serveStaticFiles attachStaticFiles cfgPath logPath =
               serverStatsBackupFile = logStats $> combine logPath "smp-server-stats.log",
               prometheusInterval = eitherToMaybe (lookupValue "STORE_LOG" "prometheus_interval" ini) >>= readMaybe . T.unpack,
               prometheusMetricsFile = combine logPath "smp-server-metrics.txt",
+              addressStats = iniAddressStats ini,
               pendingENDInterval = 15000000, -- 15 seconds
               ntfDeliveryInterval = 1500000, -- 1.5 second
               smpServerVRange = supportedServerSMPRelayVRange,

src/Simplex/Messaging/Server/Main/Init.hs

@@ -25,7 +25,7 @@ import Network.Socket (HostName)
 import Simplex.Messaging.Agent.Store.Postgres.Options (DBOpts (..))
 import Simplex.Messaging.Encoding.String
 import Simplex.Messaging.Protocol (BasicAuth)
-import Simplex.Messaging.Server.CLI (SignAlgorithm, onOff)
+import Simplex.Messaging.Server.CLI (SignAlgorithm, addressStatsIniContent, onOff)
 import Simplex.Messaging.Server.Env.STM
 import Simplex.Messaging.Server.Expiration (ExpirationConfig (..))
 import Simplex.Messaging.Server.Information (Entity (..), ServerPublicInfo (..))
@@ -176,7 +176,9 @@ iniFileContent cfgPath logPath opts host basicAuth controlPortPwds =
         \disconnect = on\n"
     <> ("ttl = " <> tshow (ttl defaultInactiveClientExpiration) <> "\n")
     <> ("check_interval = " <> tshow (checkInterval defaultInactiveClientExpiration))
-    <> "\n\n\
+    <> "\n\n"
+    <> addressStatsIniContent
+    <> "\n\
         \[WEB]\n\
         \# Set path to generate static mini-site for server information and qr codes/links\n"
     <> ("static_path = " <> T.pack (fromMaybe defaultStaticPath webStaticPath) <> "\n\n")

src/Simplex/Messaging/Server/MsgStore/Postgres.hs

@@ -114,9 +114,7 @@ instance MsgStoreClass PostgresMsgStore where
     where
       st = dbStore $ queueStore_ ms
       oldMsg = now - ttl
-      -- expired messages read per page in expire_old_messages, and the page is one
-      -- transaction: queues in it stay row-locked against SEND and ACK until it commits.
-      batchSize = 100 :: Int
+      batchSize = 10000 :: Int
       toMessageStats (expiredMsgsCount, storedMsgsCount, storedQueues) =
         MessageStats {expiredMsgsCount, storedMsgsCount, storedQueues}
 
@@ -365,8 +363,8 @@ deleteAllMessages ms =
       db
       [sql|
         UPDATE msg_queues
-        SET msg_queue_size = 0, msg_can_write = TRUE
-        WHERE msg_queue_size != 0 OR msg_can_write = FALSE
+        SET msg_queue_size = 0, msg_can_write = TRUE, msg_queue_expire = FALSE
+        WHERE msg_queue_size != 0 OR msg_can_write = FALSE OR msg_queue_expire = TRUE
       |]
 
 updateQueueCounts :: PostgresMsgStore -> IO ()
@@ -386,15 +384,16 @@ updateQueueCounts ms =
       db
       [sql|
         UPDATE msg_queues
-        SET msg_queue_size = 0, msg_can_write = TRUE
-        WHERE msg_queue_size != 0 OR msg_can_write = FALSE
+        SET msg_queue_size = 0, msg_can_write = TRUE, msg_queue_expire = FALSE
+        WHERE msg_queue_size != 0 OR msg_can_write = FALSE OR msg_queue_expire = TRUE
       |]
     void $ DB.execute_
       db
       [sql|
         UPDATE msg_queues q
         SET msg_queue_size = s.size,
-            msg_can_write = s.quota_count = 0
+            msg_can_write = s.quota_count = 0,
+            msg_queue_expire = s.size > s.quota_count
         FROM queue_stats s
         WHERE q.recipient_id = s.recipient_id
       |]

src/Simplex/Messaging/Server/Prometheus.hs

@@ -14,12 +14,15 @@ module Simplex.Messaging.Server.Prometheus
 import Data.Int (Int64)
 import qualified Data.IntMap.Strict as IM
 import Data.List (mapAccumL)
+import Data.Map.Strict (Map)
 import Data.Text (Text)
 import qualified Data.Text as T
 import Data.Time.Clock (UTCTime (..), diffUTCTime)
 import Data.Time.Clock.System (systemEpochDay)
 import Data.Time.Format.ISO8601 (iso8601Show)
 import Network.Socket (ServiceName)
+import Simplex.Messaging.Server.AddressStats (AddrHistogram, addrHistogramMetrics)
+import Simplex.Messaging.Server.Env.STM (SMPAddrCounter)
 import Simplex.Messaging.Server.MsgStore.Types (LoadedQueueCounts (..))
 import Simplex.Messaging.Server.QueueStore.Types (EntityCounts (..))
 import Simplex.Messaging.Server.Stats
@@ -46,7 +49,8 @@ data RealTimeMetrics = RealTimeMetrics
     deliveredTimes :: TimeBuckets,
     smpSubs :: RTSubscriberMetrics,
     ntfSubs :: RTSubscriberMetrics,
-    loadedCounts :: LoadedQueueCounts
+    loadedCounts :: LoadedQueueCounts,
+    addressHistograms :: Maybe (Map SMPAddrCounter AddrHistogram)
   }
 
 data RTSubscriberMetrics = RTSubscriberMetrics
@@ -59,7 +63,7 @@ data RTSubscriberMetrics = RTSubscriberMetrics
 {-# FOURMOLU_DISABLE\n#-}
 prometheusMetrics :: ServerMetrics -> RealTimeMetrics -> UTCTime -> Text
 prometheusMetrics sm rtm ts =
-  time <> queues <> subscriptions <> messages <> ntfMessages <> ntfs <> relays <> services <> names <> info
+  time <> queues <> subscriptions <> messages <> ntfMessages <> ntfs <> relays <> services <> names <> clientAddresses <> info
   where
     ServerMetrics {statsData, activeQueueCounts = ps, activeNtfCounts = psNtf, entityCounts, rtsOptions} = sm
     RealTimeMetrics
@@ -70,7 +74,8 @@ prometheusMetrics sm rtm ts =
         deliveredTimes,
         smpSubs,
         ntfSubs,
-        loadedCounts
+        loadedCounts,
+        addressHistograms
       } = rtm
     ServerStatsData
       { _fromTime,
@@ -485,6 +490,7 @@ prometheusMetrics sm rtm ts =
           \# TYPE simplex_smp_names_disabled counter\n\
           \simplex_smp_names_disabled " <> mshow _rslvDisabled <> "\n# rslvDisabled\n\
           \\n"
+    clientAddresses = maybe "" (addrHistogramMetrics "simplex_smp" $ tsEpoch ts) addressHistograms
     info =
       "# Info\n\
       \# ----\n\

src/Simplex/Messaging/Server/QueueStore.hs

@@ -13,14 +13,12 @@ module Simplex.Messaging.Server.QueueStore
     ServiceRec (..),
     CertFingerprint,
     ServerEntityStatus (..),
-    isSecuredMsgQueue,
   ) where
 
 import Control.Applicative (optional, (<|>))
 import qualified Data.ByteString.Char8 as B
 import Data.Functor (($>))
 import Data.List.NonEmpty (NonEmpty)
-import Data.Maybe (isJust)
 import qualified Data.X509 as X
 import qualified Data.X509.Validation as XV
 import Simplex.Messaging.Encoding
@@ -50,11 +48,6 @@ data QueueRec = QueueRec
   }
   deriving (Show)
 
-isSecuredMsgQueue :: QueueRec -> Bool
-isSecuredMsgQueue QueueRec {queueMode, senderKey} = case queueMode of
-  Just QMContact -> False
-  _ -> isJust senderKey
-
 data NtfCreds = NtfCreds
   { notifierId :: NotifierId,
     notifierKey :: NtfPublicAuthKey,

src/Simplex/Messaging/Server/QueueStore/Postgres.hs

@@ -314,9 +314,9 @@ instance StoreQueueClass q => QueueStoreClass q (PostgresQueueStore q) where
   addQueueLinkData st sq lnkId d =
     withQueueRec sq "addQueueLinkData" $ \q -> case queueData q of
       Nothing ->
-        addLink q $ \db -> DB.execute db qry (d :. (lnkId, rId, QMContact))
+        addLink q $ \db -> DB.execute db qry (d :. (lnkId, rId))
       Just (lnkId', _) | lnkId' == lnkId ->
-        addLink q $ \db -> DB.execute db (qry <> " AND (fixed_data IS NULL OR fixed_data = ?)") (d :. (lnkId, rId, QMContact, fst d))
+        addLink q $ \db -> DB.execute db (qry <> " AND (fixed_data IS NULL OR fixed_data = ?)") (d :. (lnkId, rId, fst d))
       _ -> throwE AUTH
     where
       rId = recipientId sq
@@ -324,8 +324,7 @@ instance StoreQueueClass q => QueueStoreClass q (PostgresQueueStore q) where
         assertUpdated $ withDB' "addQueueLinkData" st update
         atomically $ writeTVar (queueRec sq) $ Just q {queueData = Just (lnkId, d)}
         withLog "addQueueLinkData" st $ \s -> logCreateLink s rId lnkId d
-      -- the sender key condition is checked in SQL because without cache each command reads its own copy of the queue record
-      qry = "UPDATE msg_queues SET fixed_data = ?, user_data = ?, link_id = ? WHERE recipient_id = ? AND deleted_at IS NULL AND (sender_key IS NULL OR queue_mode = ?)"
+      qry = "UPDATE msg_queues SET fixed_data = ?, user_data = ?, link_id = ? WHERE recipient_id = ? AND deleted_at IS NULL"
 
   deleteQueueLinkData :: PostgresQueueStore q -> q -> IO (Either ErrorType ())
   deleteQueueLinkData st sq =

src/Simplex/Messaging/Server/QueueStore/Postgres/Migrations.hs

@@ -22,8 +22,7 @@ serverSchemaMigrations =
     ("20250903_store_messages", m20250903_store_messages, Just down_m20250903_store_messages),
     ("20250915_queue_ids_hash", m20250915_queue_ids_hash, Just down_m20250915_queue_ids_hash),
     ("20260916_prometheus_indexes", m20260916_prometheus_indexes, Just down_m20260916_prometheus_indexes),
-    ("20260917_msg_queues_hot", m20260917_msg_queues_hot, Just down_m20260917_msg_queues_hot),
-    ("20260918_expire_messages", m20260918_expire_messages, Just down_m20260918_expire_messages)
+    ("20260917_msg_queues_hot", m20260917_msg_queues_hot, Just down_m20260917_msg_queues_hot)
   ]
 
 -- | The list of migrations in ascending order by date
@@ -735,504 +734,3 @@ ALTER TABLE msg_queues RESET (fillfactor, autovacuum_vacuum_scale_factor, autova
 ALTER TABLE messages RESET (autovacuum_vacuum_scale_factor, autovacuum_analyze_scale_factor, toast.autovacuum_vacuum_scale_factor);
 ALTER TABLE services RESET (fillfactor, autovacuum_vacuum_threshold, autovacuum_vacuum_scale_factor);
     |]
-
-m20260918_expire_messages :: Text
-m20260918_expire_messages =
-  [r|
-CREATE INDEX idx_messages_expire ON messages (msg_ts, recipient_id) WHERE NOT msg_quota;
-
-DROP INDEX idx_messages_recipient_id_msg_ts;
-
-DROP INDEX idx_msg_queues_expire;
-
-DROP PROCEDURE expire_old_messages(bigint, integer);
-
-CREATE PROCEDURE expire_old_messages(IN p_old_ts bigint, IN batch_size integer, OUT r_expired_msgs_count bigint, OUT r_stored_msgs_count bigint, OUT r_stored_queues bigint)
-    LANGUAGE plpgsql
-    AS $$
-DECLARE
-  rids BYTEA[];
-  rid BYTEA;
-  last_ts BIGINT := -1;
-  last_rid BYTEA := '\x';
-  next_ts BIGINT;
-  next_rid BYTEA;
-  del_count BIGINT;
-  total_deleted BIGINT := 0;
-BEGIN
-  LOOP
-    -- The page is scanned in (msg_ts, recipient_id) order, so its last row is the next
-    -- keyset cursor. Advancing it past every row read, including queues left unexpired
-    -- because delete_expired_msgs skipped a locked row or raised, is what terminates the
-    -- loop; re-reading from the start instead would repeat those queues forever.
-    SELECT array_agg(DISTINCT recipient_id),
-           (array_agg(msg_ts ORDER BY msg_ts DESC, recipient_id DESC))[1],
-           (array_agg(recipient_id ORDER BY msg_ts DESC, recipient_id DESC))[1]
-    INTO rids, next_ts, next_rid
-    FROM (
-      SELECT msg_ts, recipient_id
-      FROM messages
-      WHERE NOT msg_quota
-        AND msg_ts < p_old_ts
-        AND (msg_ts, recipient_id) > (last_ts, last_rid)
-      ORDER BY msg_ts ASC, recipient_id ASC
-      LIMIT batch_size
-    ) m;
-
-    EXIT WHEN rids IS NULL;
-
-    FOREACH rid IN ARRAY rids
-    LOOP
-      BEGIN
-        del_count := delete_expired_msgs(rid, p_old_ts);
-        total_deleted := total_deleted + del_count;
-      EXCEPTION WHEN OTHERS THEN
-        RAISE WARNING 'STORE, expire_old_messages, error expiring queue %: %', encode(rid, 'base64'), SQLERRM;
-        CONTINUE;
-      END;
-    END LOOP;
-    COMMIT;
-
-    last_ts := next_ts;
-    last_rid := next_rid;
-  END LOOP;
-
-  r_expired_msgs_count := total_deleted;
-  r_stored_msgs_count := (SELECT COUNT(1) FROM messages);
-  r_stored_queues := (SELECT COUNT(1) FROM msg_queues WHERE deleted_at IS NULL);
-END;
-$$;
-
-CREATE OR REPLACE FUNCTION delete_expired_msgs(p_recipient_id bytea, p_old_ts bigint) RETURNS bigint
-    LANGUAGE plpgsql
-    AS $$
-DECLARE
-  q_size BIGINT;
-  keep_min_id BIGINT;
-  del_count BIGINT;
-BEGIN
-  SELECT msg_queue_size INTO q_size
-  FROM msg_queues
-  WHERE recipient_id = p_recipient_id AND deleted_at IS NULL
-  FOR UPDATE SKIP LOCKED;
-
-  IF NOT FOUND OR q_size = 0 THEN
-    RETURN 0;
-  END IF;
-
-  SELECT MIN(message_id) INTO keep_min_id
-  FROM messages WHERE recipient_id = p_recipient_id AND msg_ts >= p_old_ts AND msg_quota = FALSE;
-
-  IF keep_min_id IS NULL THEN
-    DELETE FROM messages WHERE recipient_id = p_recipient_id AND msg_quota = FALSE;
-  ELSE
-    DELETE FROM messages WHERE recipient_id = p_recipient_id AND message_id < keep_min_id AND msg_quota = FALSE;
-  END IF;
-
-  GET DIAGNOSTICS del_count = ROW_COUNT;
-  IF del_count > 0 THEN
-    UPDATE msg_queues
-    SET msg_can_write = msg_can_write OR msg_queue_size <= del_count,
-        msg_queue_size = GREATEST(msg_queue_size - del_count, 0)
-    WHERE recipient_id = p_recipient_id;
-  END IF;
-  RETURN del_count;
-END;
-$$;
-
-CREATE OR REPLACE FUNCTION write_message(p_recipient_id bytea, p_msg_id bytea, p_msg_ts bigint, p_msg_quota boolean, p_msg_ntf_flag boolean, p_msg_body bytea, p_quota integer) RETURNS TABLE(quota_written boolean, was_empty boolean)
-    LANGUAGE plpgsql
-    AS $$
-DECLARE
-  q_can_write BOOLEAN;
-  q_size BIGINT;
-BEGIN
-  SELECT msg_can_write, msg_queue_size INTO q_can_write, q_size
-  FROM msg_queues
-  WHERE recipient_id = p_recipient_id AND deleted_at IS NULL
-  FOR UPDATE;
-
-  IF q_can_write OR q_size = 0 THEN
-    quota_written := p_msg_quota OR q_size >= p_quota;
-    was_empty := q_size = 0;
-
-    INSERT INTO messages(recipient_id, msg_id, msg_ts, msg_quota, msg_ntf_flag, msg_body)
-    VALUES (p_recipient_id, p_msg_id, p_msg_ts, quota_written, p_msg_ntf_flag AND NOT quota_written, CASE WHEN quota_written THEN '' :: BYTEA ELSE p_msg_body END);
-
-    UPDATE msg_queues
-    SET msg_can_write = NOT quota_written,
-        msg_queue_size = msg_queue_size + 1
-    WHERE recipient_id = p_recipient_id;
-
-    RETURN QUERY VALUES (quota_written, was_empty);
-  END IF;
-END;
-$$;
-
-CREATE OR REPLACE FUNCTION try_del_msg(p_recipient_id bytea, p_msg_id bytea) RETURNS TABLE(r_msg_id bytea, r_msg_ts bigint, r_msg_quota boolean, r_msg_ntf_flag boolean, r_msg_body bytea)
-    LANGUAGE plpgsql
-    AS $$
-DECLARE
-  q_size BIGINT;
-  msg RECORD;
-BEGIN
-  SELECT msg_queue_size INTO q_size
-  FROM msg_queues
-  WHERE recipient_id = p_recipient_id AND deleted_at IS NULL
-  FOR UPDATE;
-
-  IF NOT FOUND THEN
-    RETURN;
-  END IF;
-
-  SELECT message_id, msg_id, msg_ts, msg_quota, msg_ntf_flag, msg_body
-  INTO msg
-  FROM messages
-  WHERE recipient_id = p_recipient_id
-  ORDER BY message_id ASC LIMIT 1;
-
-  IF NOT FOUND THEN
-    IF q_size != 0 THEN
-      UPDATE msg_queues
-      SET msg_can_write = TRUE,
-          msg_queue_size = 0
-      WHERE recipient_id = p_recipient_id;
-    END IF;
-    RETURN;
-  END IF;
-
-  IF msg.msg_id = p_msg_id THEN
-    DELETE FROM messages WHERE message_id = msg.message_id;
-    IF FOUND THEN
-      UPDATE msg_queues
-      SET msg_can_write = msg_can_write OR msg_queue_size <= 1,
-          msg_queue_size = GREATEST(msg_queue_size - 1, 0)
-      WHERE recipient_id = p_recipient_id;
-      RETURN QUERY VALUES (msg.msg_id, msg.msg_ts, msg.msg_quota, msg.msg_ntf_flag, msg.msg_body);
-    END IF;
-  END IF;
-END;
-$$;
-
-CREATE OR REPLACE FUNCTION try_del_peek_msg(p_recipient_id bytea, p_msg_id bytea) RETURNS TABLE(r_msg_id bytea, r_msg_ts bigint, r_msg_quota boolean, r_msg_ntf_flag boolean, r_msg_body bytea)
-    LANGUAGE plpgsql
-    AS $$
-DECLARE
-  q_size BIGINT;
-  msg RECORD;
-  msg_deleted BOOLEAN;
-BEGIN
-  SELECT msg_queue_size INTO q_size
-  FROM msg_queues
-  WHERE recipient_id = p_recipient_id AND deleted_at IS NULL
-  FOR UPDATE;
-
-  IF NOT FOUND THEN
-    RETURN;
-  END IF;
-
-  SELECT message_id, msg_id, msg_ts, msg_quota, msg_ntf_flag, msg_body
-  INTO msg
-  FROM messages
-  WHERE recipient_id = p_recipient_id
-  ORDER BY message_id ASC LIMIT 1;
-
-  IF NOT FOUND THEN
-    IF q_size != 0 THEN
-      UPDATE msg_queues
-      SET msg_can_write = TRUE,
-          msg_queue_size = 0
-      WHERE recipient_id = p_recipient_id;
-    END IF;
-    RETURN;
-  END IF;
-
-  IF msg.msg_id = p_msg_id THEN
-    DELETE FROM messages WHERE message_id = msg.message_id;
-
-    msg_deleted := FOUND;
-    IF msg_deleted THEN
-      RETURN QUERY VALUES (msg.msg_id, msg.msg_ts, msg.msg_quota, msg.msg_ntf_flag, msg.msg_body);
-    END IF;
-
-    SELECT msg_id, msg_ts, msg_quota, msg_ntf_flag, msg_body
-    INTO msg
-    FROM messages
-    WHERE recipient_id = p_recipient_id
-    ORDER BY message_id ASC LIMIT 1;
-
-    IF FOUND THEN
-      RETURN QUERY VALUES (msg.msg_id, msg.msg_ts, msg.msg_quota, msg.msg_ntf_flag, msg.msg_body);
-      IF msg_deleted THEN
-        UPDATE msg_queues
-        SET msg_can_write = msg_can_write OR msg_queue_size <= 1,
-            msg_queue_size = GREATEST(msg_queue_size - 1, 0)
-        WHERE recipient_id = p_recipient_id;
-      END IF;
-    ELSIF msg_deleted OR q_size != 0 THEN
-      UPDATE msg_queues
-      SET msg_can_write = TRUE,
-          msg_queue_size = 0
-      WHERE recipient_id = p_recipient_id;
-    END IF;
-  ELSE
-    RETURN QUERY VALUES (msg.msg_id, msg.msg_ts, msg.msg_quota, msg.msg_ntf_flag, msg.msg_body);
-  END IF;
-END;
-$$;
-
-ALTER TABLE msg_queues DROP COLUMN msg_queue_expire;
-    |]
-
-down_m20260918_expire_messages :: Text
-down_m20260918_expire_messages =
-  [r|
-ALTER TABLE msg_queues ADD COLUMN msg_queue_expire boolean NOT NULL DEFAULT FALSE;
-
--- ADD COLUMN already defaulted every row to FALSE, so the backfill only needs the rows
--- that become TRUE, which avoids rewriting the whole table. The flag is only read to pick
--- queues for delete_expired_msgs, and that returns 0 without deleting when msg_queue_size
--- is 0, so excluding empty queues here cannot change what expires.
-UPDATE msg_queues q
-SET msg_queue_expire = TRUE
-WHERE msg_queue_size > 0
-  AND EXISTS (SELECT 1 FROM messages m WHERE m.recipient_id = q.recipient_id AND NOT m.msg_quota);
-
-CREATE INDEX idx_msg_queues_expire ON msg_queues (recipient_id) WHERE deleted_at IS NULL AND msg_queue_expire;
-
-CREATE INDEX idx_messages_recipient_id_msg_ts ON messages (recipient_id, msg_ts);
-
-DROP INDEX idx_messages_expire;
-
-CREATE OR REPLACE FUNCTION delete_expired_msgs(p_recipient_id bytea, p_old_ts bigint) RETURNS bigint
-    LANGUAGE plpgsql
-    AS $$
-DECLARE
-  q_size BIGINT;
-  keep_min_id BIGINT;
-  del_count BIGINT;
-BEGIN
-  SELECT msg_queue_size INTO q_size
-  FROM msg_queues
-  WHERE recipient_id = p_recipient_id AND deleted_at IS NULL
-  FOR UPDATE SKIP LOCKED;
-
-  IF NOT FOUND OR q_size = 0 THEN
-    RETURN 0;
-  END IF;
-
-  SELECT MIN(message_id) INTO keep_min_id
-  FROM messages WHERE recipient_id = p_recipient_id AND msg_ts >= p_old_ts AND msg_quota = FALSE;
-
-  IF keep_min_id IS NULL THEN
-    DELETE FROM messages WHERE recipient_id = p_recipient_id AND msg_quota = FALSE;
-  ELSE
-    DELETE FROM messages WHERE recipient_id = p_recipient_id AND message_id < keep_min_id AND msg_quota = FALSE;
-  END IF;
-
-  GET DIAGNOSTICS del_count = ROW_COUNT;
-  IF del_count > 0 THEN
-    UPDATE msg_queues
-    SET msg_can_write = msg_can_write OR msg_queue_size <= del_count,
-        msg_queue_expire = msg_queue_size > del_count AND keep_min_id IS NOT NULL,
-        msg_queue_size = GREATEST(msg_queue_size - del_count, 0)
-    WHERE recipient_id = p_recipient_id;
-  END IF;
-  RETURN del_count;
-END;
-$$;
-
-CREATE OR REPLACE FUNCTION write_message(p_recipient_id bytea, p_msg_id bytea, p_msg_ts bigint, p_msg_quota boolean, p_msg_ntf_flag boolean, p_msg_body bytea, p_quota integer) RETURNS TABLE(quota_written boolean, was_empty boolean)
-    LANGUAGE plpgsql
-    AS $$
-DECLARE
-  q_can_write BOOLEAN;
-  q_size BIGINT;
-BEGIN
-  SELECT msg_can_write, msg_queue_size INTO q_can_write, q_size
-  FROM msg_queues
-  WHERE recipient_id = p_recipient_id AND deleted_at IS NULL
-  FOR UPDATE;
-
-  IF q_can_write OR q_size = 0 THEN
-    quota_written := p_msg_quota OR q_size >= p_quota;
-    was_empty := q_size = 0;
-
-    INSERT INTO messages(recipient_id, msg_id, msg_ts, msg_quota, msg_ntf_flag, msg_body)
-    VALUES (p_recipient_id, p_msg_id, p_msg_ts, quota_written, p_msg_ntf_flag AND NOT quota_written, CASE WHEN quota_written THEN '' :: BYTEA ELSE p_msg_body END);
-
-    UPDATE msg_queues
-    SET msg_can_write = NOT quota_written,
-        msg_queue_expire = TRUE,
-        msg_queue_size = msg_queue_size + 1
-    WHERE recipient_id = p_recipient_id;
-
-    RETURN QUERY VALUES (quota_written, was_empty);
-  END IF;
-END;
-$$;
-
-CREATE OR REPLACE FUNCTION try_del_msg(p_recipient_id bytea, p_msg_id bytea) RETURNS TABLE(r_msg_id bytea, r_msg_ts bigint, r_msg_quota boolean, r_msg_ntf_flag boolean, r_msg_body bytea)
-    LANGUAGE plpgsql
-    AS $$
-DECLARE
-  q_size BIGINT;
-  msg RECORD;
-BEGIN
-  SELECT msg_queue_size INTO q_size
-  FROM msg_queues
-  WHERE recipient_id = p_recipient_id AND deleted_at IS NULL
-  FOR UPDATE;
-
-  IF NOT FOUND THEN
-    RETURN;
-  END IF;
-
-  SELECT message_id, msg_id, msg_ts, msg_quota, msg_ntf_flag, msg_body
-  INTO msg
-  FROM messages
-  WHERE recipient_id = p_recipient_id
-  ORDER BY message_id ASC LIMIT 1;
-
-  IF NOT FOUND THEN
-    IF q_size != 0 THEN
-      UPDATE msg_queues
-      SET msg_can_write = TRUE,
-          msg_queue_expire = FALSE,
-          msg_queue_size = 0
-      WHERE recipient_id = p_recipient_id;
-    END IF;
-    RETURN;
-  END IF;
-
-  IF msg.msg_id = p_msg_id THEN
-    DELETE FROM messages WHERE message_id = msg.message_id;
-    IF FOUND THEN
-      UPDATE msg_queues
-      SET msg_can_write = msg_can_write OR msg_queue_size <= 1,
-          msg_queue_expire = msg_queue_size > 1,
-          msg_queue_size = GREATEST(msg_queue_size - 1, 0)
-      WHERE recipient_id = p_recipient_id;
-      RETURN QUERY VALUES (msg.msg_id, msg.msg_ts, msg.msg_quota, msg.msg_ntf_flag, msg.msg_body);
-    END IF;
-  END IF;
-END;
-$$;
-
-CREATE OR REPLACE FUNCTION try_del_peek_msg(p_recipient_id bytea, p_msg_id bytea) RETURNS TABLE(r_msg_id bytea, r_msg_ts bigint, r_msg_quota boolean, r_msg_ntf_flag boolean, r_msg_body bytea)
-    LANGUAGE plpgsql
-    AS $$
-DECLARE
-  q_size BIGINT;
-  msg RECORD;
-  msg_deleted BOOLEAN;
-BEGIN
-  SELECT msg_queue_size INTO q_size
-  FROM msg_queues
-  WHERE recipient_id = p_recipient_id AND deleted_at IS NULL
-  FOR UPDATE;
-
-  IF NOT FOUND THEN
-    RETURN;
-  END IF;
-
-  SELECT message_id, msg_id, msg_ts, msg_quota, msg_ntf_flag, msg_body
-  INTO msg
-  FROM messages
-  WHERE recipient_id = p_recipient_id
-  ORDER BY message_id ASC LIMIT 1;
-
-  IF NOT FOUND THEN
-    IF q_size != 0 THEN
-      UPDATE msg_queues
-      SET msg_can_write = TRUE,
-          msg_queue_expire = FALSE,
-          msg_queue_size = 0
-      WHERE recipient_id = p_recipient_id;
-    END IF;
-    RETURN;
-  END IF;
-
-  IF msg.msg_id = p_msg_id THEN
-    DELETE FROM messages WHERE message_id = msg.message_id;
-
-    msg_deleted := FOUND;
-    IF msg_deleted THEN
-      RETURN QUERY VALUES (msg.msg_id, msg.msg_ts, msg.msg_quota, msg.msg_ntf_flag, msg.msg_body);
-    END IF;
-
-    SELECT msg_id, msg_ts, msg_quota, msg_ntf_flag, msg_body
-    INTO msg
-    FROM messages
-    WHERE recipient_id = p_recipient_id
-    ORDER BY message_id ASC LIMIT 1;
-
-    IF FOUND THEN
-      RETURN QUERY VALUES (msg.msg_id, msg.msg_ts, msg.msg_quota, msg.msg_ntf_flag, msg.msg_body);
-      IF msg_deleted THEN
-        UPDATE msg_queues
-        SET msg_can_write = msg_can_write OR msg_queue_size <= 1,
-            msg_queue_expire = msg_queue_size > 1,
-            msg_queue_size = GREATEST(msg_queue_size - 1, 0)
-        WHERE recipient_id = p_recipient_id;
-      END IF;
-    ELSIF msg_deleted OR q_size != 0 THEN
-      UPDATE msg_queues
-      SET msg_can_write = TRUE,
-          msg_queue_expire = FALSE,
-          msg_queue_size = 0
-      WHERE recipient_id = p_recipient_id;
-    END IF;
-  ELSE
-    RETURN QUERY VALUES (msg.msg_id, msg.msg_ts, msg.msg_quota, msg.msg_ntf_flag, msg.msg_body);
-  END IF;
-END;
-$$;
-
-DROP PROCEDURE expire_old_messages(bigint, integer);
-
-CREATE PROCEDURE expire_old_messages(IN p_old_ts bigint, IN batch_size integer, OUT r_expired_msgs_count bigint, OUT r_stored_msgs_count bigint, OUT r_stored_queues bigint)
-    LANGUAGE plpgsql
-    AS $$
-DECLARE
-  rids BYTEA[];
-  rid BYTEA;
-  last_rid BYTEA := '\x';
-  del_count BIGINT;
-  total_deleted BIGINT := 0;
-BEGIN
-  LOOP
-    SELECT array_agg(recipient_id)
-    INTO rids
-    FROM (
-      SELECT recipient_id
-      FROM msg_queues
-      WHERE deleted_at IS NULL
-        AND msg_queue_expire = TRUE
-        AND recipient_id > last_rid
-      ORDER BY recipient_id ASC
-      LIMIT batch_size
-    ) qs;
-
-    EXIT WHEN rids IS NULL OR cardinality(rids) = 0;
-
-    FOREACH rid IN ARRAY rids
-    LOOP
-      BEGIN
-        del_count := delete_expired_msgs(rid, p_old_ts);
-        total_deleted := total_deleted + del_count;
-      EXCEPTION WHEN OTHERS THEN
-        RAISE WARNING 'STORE, expire_old_messages, error expiring queue %: %', encode(rid, 'base64'), SQLERRM;
-        CONTINUE;
-      END;
-      COMMIT;
-    END LOOP;
-    last_rid := rids[cardinality(rids)];
-  END LOOP;
-
-  r_expired_msgs_count := total_deleted;
-  r_stored_msgs_count := (SELECT COUNT(1) FROM messages);
-  r_stored_queues := (SELECT COUNT(1) FROM msg_queues WHERE deleted_at IS NULL);
-END;
-$$;
-    |]

src/Simplex/Messaging/Server/QueueStore/Postgres/server_schema.sql

@@ -47,6 +47,7 @@ BEGIN
   IF del_count > 0 THEN
     UPDATE msg_queues
     SET msg_can_write = msg_can_write OR msg_queue_size <= del_count,
+        msg_queue_expire = msg_queue_size > del_count AND keep_min_id IS NOT NULL,
         msg_queue_size = GREATEST(msg_queue_size - del_count, 0)
     WHERE recipient_id = p_recipient_id;
   END IF;
@@ -62,33 +63,24 @@ CREATE PROCEDURE smp_server.expire_old_messages(IN p_old_ts bigint, IN batch_siz
 DECLARE
   rids BYTEA[];
   rid BYTEA;
-  last_ts BIGINT := -1;
   last_rid BYTEA := '\x';
-  next_ts BIGINT;
-  next_rid BYTEA;
   del_count BIGINT;
   total_deleted BIGINT := 0;
 BEGIN
   LOOP
-    -- The page is scanned in (msg_ts, recipient_id) order, so its last row is the next
-    -- keyset cursor. Advancing it past every row read, including queues left unexpired
-    -- because delete_expired_msgs skipped a locked row or raised, is what terminates the
-    -- loop; re-reading from the start instead would repeat those queues forever.
-    SELECT array_agg(DISTINCT recipient_id),
-           (array_agg(msg_ts ORDER BY msg_ts DESC, recipient_id DESC))[1],
-           (array_agg(recipient_id ORDER BY msg_ts DESC, recipient_id DESC))[1]
-    INTO rids, next_ts, next_rid
+    SELECT array_agg(recipient_id)
+    INTO rids
     FROM (
-      SELECT msg_ts, recipient_id
-      FROM messages
-      WHERE NOT msg_quota
-        AND msg_ts < p_old_ts
-        AND (msg_ts, recipient_id) > (last_ts, last_rid)
-      ORDER BY msg_ts ASC, recipient_id ASC
+      SELECT recipient_id
+      FROM msg_queues
+      WHERE deleted_at IS NULL
+        AND msg_queue_expire = TRUE
+        AND recipient_id > last_rid
+      ORDER BY recipient_id ASC
       LIMIT batch_size
-    ) m;
+    ) qs;
 
-    EXIT WHEN rids IS NULL;
+    EXIT WHEN rids IS NULL OR cardinality(rids) = 0;
 
     FOREACH rid IN ARRAY rids
     LOOP
@@ -99,11 +91,9 @@ BEGIN
         RAISE WARNING 'STORE, expire_old_messages, error expiring queue %: %', encode(rid, 'base64'), SQLERRM;
         CONTINUE;
       END;
+      COMMIT;
     END LOOP;
-    COMMIT;
-
-    last_ts := next_ts;
-    last_rid := next_rid;
+    last_rid := rids[cardinality(rids)];
   END LOOP;
 
   r_expired_msgs_count := total_deleted;
@@ -205,6 +195,7 @@ BEGIN
     IF q_size != 0 THEN
       UPDATE msg_queues
       SET msg_can_write = TRUE,
+          msg_queue_expire = FALSE,
           msg_queue_size = 0
       WHERE recipient_id = p_recipient_id;
     END IF;
@@ -216,6 +207,7 @@ BEGIN
     IF FOUND THEN
       UPDATE msg_queues
       SET msg_can_write = msg_can_write OR msg_queue_size <= 1,
+          msg_queue_expire = msg_queue_size > 1,
           msg_queue_size = GREATEST(msg_queue_size - 1, 0)
       WHERE recipient_id = p_recipient_id;
       RETURN QUERY VALUES (msg.msg_id, msg.msg_ts, msg.msg_quota, msg.msg_ntf_flag, msg.msg_body);
@@ -253,6 +245,7 @@ BEGIN
     IF q_size != 0 THEN
       UPDATE msg_queues
       SET msg_can_write = TRUE,
+          msg_queue_expire = FALSE,
           msg_queue_size = 0
       WHERE recipient_id = p_recipient_id;
     END IF;
@@ -278,12 +271,14 @@ BEGIN
       IF msg_deleted THEN
         UPDATE msg_queues
         SET msg_can_write = msg_can_write OR msg_queue_size <= 1,
+            msg_queue_expire = msg_queue_size > 1,
             msg_queue_size = GREATEST(msg_queue_size - 1, 0)
         WHERE recipient_id = p_recipient_id;
       END IF;
     ELSIF msg_deleted OR q_size != 0 THEN
       UPDATE msg_queues
       SET msg_can_write = TRUE,
+          msg_queue_expire = FALSE,
           msg_queue_size = 0
       WHERE recipient_id = p_recipient_id;
     END IF;
@@ -353,6 +348,7 @@ BEGIN
 
     UPDATE msg_queues
     SET msg_can_write = NOT quota_written,
+        msg_queue_expire = TRUE,
         msg_queue_size = msg_queue_size + 1
     WHERE recipient_id = p_recipient_id;
 
@@ -444,6 +440,7 @@ CREATE TABLE smp_server.msg_queues (
     rcv_service_id bytea,
     ntf_service_id bytea,
     msg_can_write boolean DEFAULT true NOT NULL,
+    msg_queue_expire boolean DEFAULT false NOT NULL,
     msg_queue_size bigint DEFAULT 0 NOT NULL
 )
 WITH (fillfactor='80', autovacuum_vacuum_scale_factor='0.02', autovacuum_analyze_scale_factor='0.01', autovacuum_vacuum_cost_limit='1000');
@@ -488,10 +485,6 @@ ALTER TABLE ONLY smp_server.services
 
 
 
-CREATE INDEX idx_messages_expire ON smp_server.messages USING btree (msg_ts, recipient_id) WHERE (NOT msg_quota);
-
-
-
 CREATE INDEX idx_messages_recipient_id_message_id ON smp_server.messages USING btree (recipient_id, message_id);
 
 
@@ -500,6 +493,14 @@ CREATE INDEX idx_messages_recipient_id_msg_quota ON smp_server.messages USING bt
 
 
 
+CREATE INDEX idx_messages_recipient_id_msg_ts ON smp_server.messages USING btree (recipient_id, msg_ts);
+
+
+
+CREATE INDEX idx_msg_queues_expire ON smp_server.msg_queues USING btree (recipient_id) WHERE ((deleted_at IS NULL) AND msg_queue_expire);
+
+
+
 CREATE UNIQUE INDEX idx_msg_queues_link_id ON smp_server.msg_queues USING btree (link_id);
 
 

src/Simplex/Messaging/Server/QueueStore/STM.hs

@@ -173,7 +173,6 @@ instance StoreQueueClass q => QueueStoreClass q (STMQueueStore q) where
       rId = recipientId sq
       qr = queueRec sq
       add q = case queueData q of
-        _ | isSecuredMsgQueue q -> pure $ Left AUTH
         Nothing -> addLink
         Just (lnkId', d') | lnkId' == lnkId && fst d' == fst d -> addLink
         _ -> pure $ Left AUTH

src/Simplex/Messaging/Session.hs

@@ -6,7 +6,6 @@ module Simplex.Messaging.Session
   ( SessionVar (..),
     getSessVar,
     removeSessVar,
-    currentSessVar,
     withGetSessVar,
     withGetSessVar',
     tryReadSessVar,
@@ -45,10 +44,6 @@ removeSessVar v sessKey vs =
     Just v' | sessionVarId v == sessionVarId v' -> TM.delete sessKey vs
     _ -> pure ()
 
--- the client is current while its session var is the one in the map
-currentSessVar :: Ord k => SessionVar a -> k -> TMap k (SessionVar a) -> STM Bool
-currentSessVar v sessKey vs = maybe False ((sessionVarId v ==) . sessionVarId) <$> TM.lookup sessKey vs
-
 -- | Get or create a session var and route to onNew (newly created) or onExisting. The new-var
 -- branch is bracketed from the point of creation: if it is interrupted before filling the var
 -- (e.g. an async exception during connect), the still-empty var is dropped from the map so the

src/Simplex/Messaging/Transport.hs

@@ -46,6 +46,7 @@ module Simplex.Messaging.Transport
     minServerSMPRelayVersion,
     currentClientSMPRelayVersion,
     currentServerSMPRelayVersion,
+    shortLinksSMPVersion,
     serviceCertsSMPVersion,
     newNtfCredsSMPVersion,
     clientNoticesSMPVersion,
@@ -53,7 +54,6 @@ module Simplex.Messaging.Transport
     namesSMPVersion,
     serverInfoSMPVersion,
     nameAvailSMPVersion,
-    fwdNoncesSMPVersion,
     simplexMQVersion,
     smpBlockSize,
     TransportConfig (..),
@@ -177,7 +177,6 @@ smpBlockSize = 16384
 -- 20 - public namespaces resolver, RSLV command (6/20/2026)
 -- 21 - server public information in handshake (7/5/2026)
 -- 22 - RNAME answers name availability as well as the record (7/25/2026)
--- 23 - version in forwarded command nonce, random nonce in forwarded responses (10/2/2026)
 
 data SMPVersion
 
@@ -190,8 +189,11 @@ type VersionRangeSMP = VersionRange SMPVersion
 pattern VersionSMP :: Word16 -> VersionSMP
 pattern VersionSMP v = Version v
 
-_shortLinksSMPVersion :: VersionSMP
-_shortLinksSMPVersion = VersionSMP 15
+_proxyServerHandshakeSMPVersion :: VersionSMP
+_proxyServerHandshakeSMPVersion = VersionSMP 14
+
+shortLinksSMPVersion :: VersionSMP
+shortLinksSMPVersion = VersionSMP 15
 
 serviceCertsSMPVersion :: VersionSMP
 serviceCertsSMPVersion = VersionSMP 16
@@ -216,32 +218,29 @@ serverInfoSMPVersion = VersionSMP 21
 nameAvailSMPVersion :: VersionSMP
 nameAvailSMPVersion = VersionSMP 22
 
-fwdNoncesSMPVersion :: VersionSMP
-fwdNoncesSMPVersion = VersionSMP 23
-
 minClientSMPRelayVersion :: VersionSMP
-minClientSMPRelayVersion = VersionSMP 15
+minClientSMPRelayVersion = VersionSMP 14
 
 minServerSMPRelayVersion :: VersionSMP
-minServerSMPRelayVersion = VersionSMP 15
+minServerSMPRelayVersion = VersionSMP 14
 
 currentClientSMPRelayVersion :: VersionSMP
-currentClientSMPRelayVersion = VersionSMP 23
+currentClientSMPRelayVersion = VersionSMP 22
 
 currentServerSMPRelayVersion :: VersionSMP
-currentServerSMPRelayVersion = VersionSMP 23
+currentServerSMPRelayVersion = VersionSMP 22
 
 -- Max SMP protocol version to be used in e2e encrypted connection between
 -- client and server, as defined by SMP proxy. Normally set below the current
 -- version to prevent client version fingerprinting by the destination relays
--- when clients upgrade at different times. Pinned to the current version (23)
--- for this release because forwarded commands use the nonces from
--- fwdNoncesSMPVersion (23), so the one-version anti-fingerprinting buffer does
--- not apply yet; it reappears once the current version advances past 23.
+-- when clients upgrade at different times. Pinned to the current version (22)
+-- for this release because a proxied RSLV only carries availability from
+-- nameAvailSMPVersion (22), so the one-version anti-fingerprinting buffer does
+-- not apply yet; it reappears once the current version advances past 22.
 proxiedSMPRelayVersion :: VersionSMP
-proxiedSMPRelayVersion = VersionSMP 23
+proxiedSMPRelayVersion = VersionSMP 22
 
--- minimal supported protocol version is 15
+-- minimal supported protocol version is 14
 supportedClientSMPRelayVRange :: VersionRangeSMP
 supportedClientSMPRelayVRange = mkVersionRange minClientSMPRelayVersion currentClientSMPRelayVersion
 
@@ -866,6 +865,7 @@ forceCertChain :: CertChainPubKey -> CertChainPubKey
 forceCertChain cert@(CertChainPubKey (X.CertificateChain cc) signedKey) = length (show cc) `seq` show signedKey `seq` cert
 {-# INLINE forceCertChain #-}
 
+-- This function is only used with v >= 8, so currently it's a simple record update.
 -- * Note: it requires updating version-based parameters, to be consistent with smpTHandle_.
 smpTHParamsSetVersion :: VersionSMP -> THandleParams SMPVersion p -> THandleParams SMPVersion p
 smpTHParamsSetVersion v params =

src/Simplex/Messaging/Transport/HTTP2/Server.hs

@@ -54,7 +54,7 @@ getHTTP2Server HTTP2ServerConfig {qSize, http2Port, bufferSize, bodyHeadSize, se
   started <- newEmptyTMVarIO
   reqQ <- newTBQueueIO qSize
   action <- async $
-    runHTTP2Server started http2Port bufferSize serverSupported srvCreds Nothing transportConfig Nothing (const $ pure ()) $ \_sniUsed sessionId sessionALPN r sendResponse -> do
+    runHTTP2Server started http2Port bufferSize serverSupported srvCreds Nothing transportConfig Nothing (const $ pure ()) (\_ _ handler -> handler) $ \_sniUsed sessionId sessionALPN r sendResponse -> do
       reqBody <- getHTTP2Body r bodyHeadSize
       atomically $ writeTBQueue reqQ HTTP2Request {sessionId, sessionALPN, request = r, reqBody, sendResponse}
   void . atomically $ takeTMVar started
@@ -63,13 +63,13 @@ getHTTP2Server HTTP2ServerConfig {qSize, http2Port, bufferSize, bodyHeadSize, se
 closeHTTP2Server :: HTTP2Server -> IO ()
 closeHTTP2Server = uninterruptibleCancel . action
 
-runHTTP2Server :: TMVar Bool -> ServiceName -> BufferSize -> T.Supported -> T.Credential -> Maybe T.Credential -> TransportServerConfig -> Maybe ExpirationConfig -> (SessionId -> IO ()) -> (SNICredentialUsed -> HTTP2ServerFunc) -> IO ()
-runHTTP2Server started port bufferSize srvSupported srvCreds httpCreds_ transportConfig expCfg_ clientFinished = runHTTP2ServerWith_ expCfg_ clientFinished bufferSize setup
+runHTTP2Server :: TMVar Bool -> ServiceName -> BufferSize -> T.Supported -> T.Credential -> Maybe T.Credential -> TransportServerConfig -> Maybe ExpirationConfig -> (SessionId -> IO ()) -> (Socket -> SessionId -> IO () -> IO ()) -> (SNICredentialUsed -> HTTP2ServerFunc) -> IO ()
+runHTTP2Server started port bufferSize srvSupported srvCreds httpCreds_ transportConfig expCfg_ clientFinished withConnection = runHTTP2ServerWith_ expCfg_ clientFinished bufferSize setup
   where
     setup handler = do
       ss <- newSocketState
       let combinedCreds = TLSServerCredential {credential = srvCreds, sniCredential = httpCreds_}
-      runTransportServerState_ ss started port srvSupported combinedCreds transportConfig $ \_ -> handler
+      runTransportServerState_ ss started port srvSupported combinedCreds transportConfig $ \sock h@(_, tls) -> withConnection sock (tlsUniq tls) (handler h)
 
 -- HTTP2 server can be run on both client and server TLS connections.
 runHTTP2ServerWith :: BufferSize -> ((TLS p -> IO ()) -> a) -> HTTP2ServerFunc -> a

src/Simplex/Messaging/Transport/KeepAlive.hs

@@ -11,7 +11,6 @@ module Simplex.Messaging.Transport.KeepAlive
   ) where
 
 import qualified Data.Aeson.TH as J
-import Control.Monad (when)
 import Foreign.C (CInt (..))
 import Network.Socket
 import Simplex.Messaging.Parsers (defaultJSON)
@@ -19,25 +18,16 @@ import Simplex.Messaging.Parsers (defaultJSON)
 data KeepAliveOpts = KeepAliveOpts
   { keepIdle :: Int,
     keepIntvl :: Int,
-    keepCnt :: Int,
-    -- | A connection with unacknowledged data gets no keep-alive probes, so the OS fails it only when it
-    -- gives up retransmitting - ~15 minutes on Linux and Android. When this is set such a connection is
-    -- failed after the keep-alive detection time instead. Absent or False - the OS default.
-    unackedDataTimeout :: Maybe Bool
+    keepCnt :: Int
   }
   deriving (Eq, Show)
 
--- seconds after which a connection with no response to the probes is reported as failed
-keepAliveDetectionTime :: KeepAliveOpts -> Int
-keepAliveDetectionTime KeepAliveOpts {keepIdle, keepIntvl, keepCnt} = keepIdle + keepIntvl * keepCnt
-
 defaultKeepAliveOpts :: KeepAliveOpts
 defaultKeepAliveOpts =
   KeepAliveOpts
     { keepIdle = 30,
       keepIntvl = 15,
-      keepCnt = 4,
-      unackedDataTimeout = Nothing
+      keepCnt = 4
     }
 
 _SOL_TCP :: CInt
@@ -63,12 +53,8 @@ _TCP_KEEPCNT = 16
 
 #if defined(darwin_HOST_OS)
 foreign import capi "netinet/tcp.h value TCP_KEEPALIVE" _TCP_KEEPIDLE :: CInt
-
-foreign import capi "netinet/tcp.h value TCP_RXT_CONNDROPTIME" _TCP_RXT_CONNDROPTIME :: CInt
 #else
 foreign import capi "netinet/tcp.h value TCP_KEEPIDLE" _TCP_KEEPIDLE :: CInt
-
-foreign import capi "netinet/tcp.h value TCP_USER_TIMEOUT" _TCP_USER_TIMEOUT :: CInt
 #endif
 
 foreign import capi "netinet/tcp.h value TCP_KEEPINTVL" _TCP_KEEPINTVL :: CInt
@@ -77,22 +63,11 @@ foreign import capi "netinet/tcp.h value TCP_KEEPCNT" _TCP_KEEPCNT :: CInt
 
 #endif
 
--- | seconds
-setSocketUnackedDataTimeout :: Socket -> Int -> IO ()
-#if defined(mingw32_HOST_OS)
-setSocketUnackedDataTimeout _ _ = pure ()
-#elif defined(darwin_HOST_OS)
-setSocketUnackedDataTimeout sock = setSocketOption sock (SockOpt _SOL_TCP _TCP_RXT_CONNDROPTIME)
-#else
-setSocketUnackedDataTimeout sock t = setSocketOption sock (SockOpt _SOL_TCP _TCP_USER_TIMEOUT) (t * 1000) -- TCP_USER_TIMEOUT is in milliseconds
-#endif
-
 setSocketKeepAlive :: Socket -> KeepAliveOpts -> IO ()
-setSocketKeepAlive sock ka@KeepAliveOpts {keepCnt, keepIdle, keepIntvl, unackedDataTimeout} = do
+setSocketKeepAlive sock KeepAliveOpts {keepCnt, keepIdle, keepIntvl} = do
   setSocketOption sock KeepAlive 1
   setSocketOption sock (SockOpt _SOL_TCP _TCP_KEEPIDLE) keepIdle
   setSocketOption sock (SockOpt _SOL_TCP _TCP_KEEPINTVL) keepIntvl
   setSocketOption sock (SockOpt _SOL_TCP _TCP_KEEPCNT) keepCnt
-  when (unackedDataTimeout == Just True) $ setSocketUnackedDataTimeout sock $ keepAliveDetectionTime ka
 
 $(J.deriveJSON defaultJSON ''KeepAliveOpts)

src/Simplex/RemoteControl/Client.hs

@@ -26,7 +26,6 @@ module Simplex.RemoteControl.Client
     -- for tests only
     sendRCPacket,
     receiveRCPacket,
-    findRCCtrlPairing,
   ) where
 
 import Control.Applicative ((<|>))
@@ -47,7 +46,7 @@ import Data.List.NonEmpty (NonEmpty (..))
 import qualified Data.List.NonEmpty as L
 import Data.Maybe (isNothing)
 import qualified Data.Text as T
-import Data.Time.Clock.System (SystemTime (..), getSystemTime)
+import Data.Time.Clock.System (getSystemTime)
 import Data.Tuple (swap)
 import Data.Word (Word16)
 import qualified Data.X509 as X
@@ -396,10 +395,8 @@ findRCCtrlPairing :: NonEmpty RCCtrlPairing -> RCEncInvitation -> ExceptT RCErro
 findRCCtrlPairing pairings RCEncInvitation {dhPubKey, nonce, encInvitation} = do
   (pairing, signedInvStr) <- liftEither $ decrypt (L.toList pairings)
   signedInv <- liftEitherWith RCESyntax $ strDecode signedInvStr
-  inv@(RCVerifiedInvitation RCInvitation {dh = invDh, ts}) <- maybe (throwE RCEInvitation) pure $ verifySignedInvitation signedInv
+  inv@(RCVerifiedInvitation RCInvitation {dh = invDh}) <- maybe (throwE RCEInvitation) pure $ verifySignedInvitation signedInv
   unless (invDh == dhPubKey) $ throwE RCEInvitation
-  now <- systemSeconds <$> liftIO getSystemTime
-  unless (now - 3660 <= systemSeconds ts && systemSeconds ts <= now + 3600) $ throwE RCEInvitation
   pure (pairing, inv)
   where
     decrypt :: [RCCtrlPairing] -> Either RCErrorType (RCCtrlPairing, ByteString)

src/Simplex/RemoteControl/Discovery.hs

@@ -122,22 +122,18 @@ closeListener subscribers sock =
 joinMulticast :: TMVar Int -> N.Socket -> N.HostAddress -> IO ()
 joinMulticast subscribers sock group = do
   now <- atomically $ takeTMVar subscribers
-  if now == 0
-    then
-      setMembership sock group True >>= \case
-        Left e -> atomically (putTMVar subscribers now) >> logError ("setMembership failed " <> tshow e)
-        Right () -> atomically $ putTMVar subscribers (now + 1)
-    else atomically $ putTMVar subscribers (now + 1)
+  when (now == 0) $ do
+    setMembership sock group True >>= \case
+      Left e -> atomically (putTMVar subscribers now) >> logError ("setMembership failed " <> tshow e)
+      Right () -> atomically $ putTMVar subscribers (now + 1)
 
 partMulticast :: TMVar Int -> N.Socket -> N.HostAddress -> IO ()
 partMulticast subscribers sock group = do
   now <- atomically $ takeTMVar subscribers
-  if now == 1
-    then
-      setMembership sock group False >>= \case
-        Left e -> atomically (putTMVar subscribers (now - 1)) >> logError ("setMembership failed " <> tshow e)
-        Right () -> atomically $ putTMVar subscribers (now - 1)
-    else atomically $ putTMVar subscribers (max 0 (now - 1))
+  when (now == 1) $
+    setMembership sock group False >>= \case
+      Left e -> atomically (putTMVar subscribers now) >> logError ("setMembership failed " <> tshow e)
+      Right () -> atomically $ putTMVar subscribers (now - 1)
 
 listenerHostAddr4 :: UDP.ListenSocket -> N.HostAddress
 listenerHostAddr4 sock = case UDP.mySockAddr sock of

tests/AgentTests/ConnectionRequestTests.hs

@@ -20,8 +20,6 @@ module AgentTests.ConnectionRequestTests
 
 import AgentTests.EqInstances ()
 import Data.ByteString (ByteString)
-import qualified Data.ByteString.Char8 as B
-import Data.Either (isLeft)
 import Network.HTTP.Types (urlEncode)
 import Simplex.Messaging.Agent.Protocol
 import qualified Simplex.Messaging.Crypto as C
@@ -287,9 +285,6 @@ connectionRequestTests =
       contactAddressV6 #== ("https://simplex.chat/contact#/?v=1-2&smp=" <> url queueStr) -- adjusted to v6
       contactAddressV6 #== ("https://simplex.chat/contact#/?v=2-2&smp=" <> url queueStr)
       contactAddressClientData #==# ("simplex:/contact#/?v=6-8&smp=" <> url queueStr <> "&data=" <> url "{\"type\":\"group_link\", \"group_link_id\":\"abc\"}")
-    it "should reject KEM ciphertext without KEM key in e2e params" $
-      strDecode @(RcvE2ERatchetParamsUri 'C.X448) (strEncode testE2ERatchetParams <> "&kem_ct=" <> strEncode (B.replicate 1039 '\0'))
-        `shouldSatisfy` isLeft
     it "should serialize / parse queue address, connection invitations and contact addresses as binary" $ do
       smpEncodingTest queue
       smpEncodingTest queueNoQM -- this passes, no queue mode patch in SMPQueueUri encoding
@@ -362,10 +357,6 @@ connectionRequestTests =
       smpEncodingTest $ AgentServiceRequest [qInfo] Nothing "service request payload"
       smpEncodingTest $ AgentServiceResponse "service response payload"
       smpEncodingTest $ AgentRejection "rejected: not allowed"
-    it "should serialize and parse ratchet key info" $ do
-      smpDecode "R" `shouldBe` Right (AgentRatchetInfo RatchetInfo {answeredKeyHash = Nothing})
-      smpDecode "R1\3abcdef" `shouldBe` Right (AgentRatchetInfo RatchetInfo {answeredKeyHash = Just "abc"})
-      smpEncodingTest $ AgentRatchetInfo RatchetInfo {answeredKeyHash = Just "0123456789abcdef0123456789abcdef"}
   where
     smpEncodingTest :: (Encoding a, Eq a, Show a, HasCallStack) => a -> Expectation
     smpEncodingTest a = smpDecode (smpEncode a) `shouldBe` Right a

tests/AgentTests/FunctionalAPITests.hs

@@ -70,8 +70,8 @@ import Data.ByteString.Char8 (ByteString)
 import qualified Data.ByteString.Char8 as B
 import Data.Either (isRight)
 import Data.Int (Int64)
-import Data.List (find, isInfixOf, isPrefixOf, isSuffixOf)
-import Data.List.NonEmpty (NonEmpty (..))
+import Data.List (find, isPrefixOf, isSuffixOf)
+import Data.List.NonEmpty (NonEmpty)
 import qualified Data.Map as M
 import Data.Maybe (isJust, isNothing)
 import qualified Data.Set as S
@@ -87,13 +87,12 @@ import SMPAgentClient
 import SMPClient
 import Simplex.Messaging.Agent hiding (acceptContact, createConnection, deleteConnection, deleteConnections, getConnShortLink, joinConnection, sendMessage, setConnShortLink, subscribeConnection, suspendConnection)
 import qualified Simplex.Messaging.Agent as A
-import Simplex.Messaging.Agent.Client (ProtocolTestFailure (..), ProtocolTestStep (..), ServerQueueInfo (..), UserNetworkInfo (..), UserNetworkType (..), sendAgentMessage, waitForUserNetwork)
+import Simplex.Messaging.Agent.Client (ProtocolTestFailure (..), ProtocolTestStep (..), ServerQueueInfo (..), UserNetworkInfo (..), UserNetworkType (..), waitForUserNetwork)
 import Simplex.Messaging.Agent.Env.SQLite (AgentConfig (..), Env (..), InitialAgentServers (..), createAgentStore)
 import Simplex.Messaging.Agent.Protocol hiding (CON, CONF, INFO, REQ, SENT)
 import qualified Simplex.Messaging.Agent.Protocol as A
-import Simplex.Messaging.Agent.RetryInterval (RetryInterval (..), RetryInterval2 (..))
 import Simplex.Messaging.Agent.Store (Connection' (..), SomeConn' (..), StoredRcvQueue (..))
-import Simplex.Messaging.Agent.Store.AgentStore (deleteRatchetKeyHashesExpired, getConn, getRatchetX3dhKeys)
+import Simplex.Messaging.Agent.Store.AgentStore (getConn)
 import Simplex.Messaging.Agent.Store.Common (DBStore (..), withTransaction)
 import Simplex.Messaging.Agent.Store.Interface
 import qualified Simplex.Messaging.Agent.Store.DB as DB
@@ -113,7 +112,7 @@ import Simplex.Messaging.Server.Information (ServerPublicInfo (..))
 import Simplex.Messaging.Server.MsgStore.Types (SMSType (..), SQSType (..))
 import Simplex.Messaging.Server.QueueStore.QueueInfo
 import Simplex.Messaging.Server.StoreLog (StoreLogRecord (..))
-import Simplex.Messaging.Transport (ASrvTransport, SMPVersion, VersionSMP, currentServerSMPRelayVersion, minClientSMPRelayVersion, minServerSMPRelayVersion, alpnSupportedSMPHandshakes)
+import Simplex.Messaging.Transport (ASrvTransport, SMPVersion, VersionSMP, currentServerSMPRelayVersion, minClientSMPRelayVersion, minServerSMPRelayVersion, alpnSupportedSMPHandshakes, supportedServerSMPRelayVRange)
 import Simplex.Messaging.Transport.Server (TransportServerConfig (..))
 import Simplex.Messaging.Util (bshow, diffToMicroseconds)
 import Simplex.Messaging.Version (VersionRange (..))
@@ -232,11 +231,7 @@ pattern Rcvd' :: AgentMsgId -> AgentMsgId -> AEvent 'AEConn
 pattern Rcvd' aMsgId rcvdMsgId <- RCVD MsgMeta {integrity = MsgOk, recipient = (aMsgId, _)} [MsgReceipt {agentMsgId = rcvdMsgId, msgRcptStatus = MROk}]
 
 smpCfgVPrev :: ProtocolClientConfig SMPVersion
-smpCfgVPrev =
-  (smpCfg agentCfg)
-    { serverVRange = prevRange $ serverVRange $ smpCfg agentCfg,
-      proxiedRelayVRange = prevRange $ proxiedRelayVRange $ smpCfg agentCfg
-    }
+smpCfgVPrev = (smpCfg agentCfg) {serverVRange = prevRange $ serverVRange $ smpCfg agentCfg}
 
 -- ntfCfgVPrev :: ProtocolClientConfig NTFVersion
 -- ntfCfgVPrev = (ntfCfg agentCfg) {clientALPN = Nothing, serverVRange = V.mkVersionRange (VersionNTF 1) (VersionNTF 1)}
@@ -416,6 +411,7 @@ functionalAPITests ps = do
     describe "should connect via 1-time short link with async join" $ testProxyMatrix ps testInvitationShortLinkAsync
     describe "should connect via contact short link" $ testProxyMatrix ps testContactShortLink
     describe "should add short link to existing contact and connect" $ testProxyMatrix ps testAddContactShortLink
+    xdescribe "try to create 1-time short link with prev versions" $ testProxyMatrixWithPrev ps testInvitationShortLinkPrev
     describe "server restart" $ do
       it "should get 1-time link data after restart" $ testInvitationShortLinkRestart ps
       it "should connect via contact short link after restart" $ testContactShortLinkRestart ps
@@ -463,16 +459,6 @@ functionalAPITests ps = do
         testRatchetSyncSuspendForeground ps
       it "should synchronize ratchets when clients start synchronization simultaneously" $
         testRatchetSyncSimultaneous ps
-      it "should ignore replayed ratchet key after expired hashes are deleted" $
-        testRatchetSyncReplayedKey ps
-      it "should synchronize ratchets when synchronization is forced again" $
-        testRatchetSyncRepeated ps
-      it "should not mark ratchet key as processed when ratchet recreation fails" $
-        testRatchetSyncFailedKeyNotProcessed ps
-      it "should not store reply ratchet key when ratchet recreation fails" $
-        testRatchetSyncFailedRecreationNoReply ps
-      it "should not store ratchet key when starting synchronization fails" $
-        testRatchetSyncStartFailedNoKey ps
 #endif
     describe "Subscription mode OnlyCreate" $ do
       it "messages delivered only when polled" $
@@ -607,7 +593,6 @@ functionalAPITests ps = do
   describe "user network info" $ do
     it "should wait for user network" testWaitForUserNetwork
     it "should not reset online to offline if happens too quickly" testDoNotResetOnlineToOffline
-    it "should reconnect to servers when network changes" $ testNetworkChangeReconnect ps
     it "should resume multiple threads" testResumeMultipleThreads
   describe "SMP queue info" $ do
     it "server should respond with queue and subscription information" $
@@ -678,6 +663,19 @@ testProxyMatrix ps runTest = do
   it "2 servers, directly" $ withSmpServers2 ps $ withAgentClientsServers2 (agentCfg, initAgentServers) (agentCfg, initAgentServers2) $ runTest False
   it "2 servers, via proxy" $ withSmpServersProxy2 ps $ withAgentClientsServers2 (agentCfg, initAgentServersProxy) (agentCfg, initAgentServersProxy2) $ runTest True
 
+testProxyMatrixWithPrev :: HasCallStack => (ASrvTransport, AStoreType) -> (Bool -> Bool -> AgentClient -> AgentClient -> IO ()) -> Spec
+testProxyMatrixWithPrev ps@(t, msType@(ASType qs _ms)) runTest = do
+  it "2 servers, directly, curr clients, prev servers" $ withSmpServers2Prev $ withAgentClientsServers2 (agentCfg, initAgentServers) (agentCfg, initAgentServers2) $ runTest False True
+  it "2 servers, via proxy, curr clients, prev servers" $ withSmpServersProxy2Prev $ withAgentClientsServers2 (agentCfg, initAgentServersProxy) (agentCfg, initAgentServersProxy2) $ runTest True True
+  it "2 servers, directly, prev clients, curr servers" $ withSmpServers2 ps $ withAgentClientsServers2 (agentCfgVPrevPQ, initAgentServers) (agentCfgVPrevPQ, initAgentServers2) $ runTest False False
+  it "2 servers, via proxy, prev clients, curr servers" $ withSmpServersProxy2 ps $ withAgentClientsServers2 (agentCfgVPrevPQ, initAgentServersProxy) (agentCfgVPrevPQ, initAgentServersProxy2) $ runTest True False
+  where
+    prev cfg' = updateCfg cfg' $ \cfg_ -> cfg_ {smpServerVRange = prevRange supportedServerSMPRelayVRange}
+    withSmpServers2Prev a = withServers2 (prev $ cfgMS msType) (prev $ cfgJ2QS qs) a
+    withSmpServersProxy2Prev a = withServers2 (prev $ proxyCfgMS msType) (prev $ proxyCfgJ2QS qs) a
+    withServers2 cfg1 cfg2 a =
+      withSmpServerConfigOn t cfg1 testPort $ \_ -> withSmpServerConfigOn t cfg2 testPort2 $ \_ -> a
+
 testPQMatrix2 :: HasCallStack => (ASrvTransport, AStoreType) -> (HasCallStack => (AgentClient, InitialKeys) -> (AgentClient, PQSupport) -> AgentMsgId -> IO ()) -> Spec
 testPQMatrix2 = pqMatrix2_ True
 
@@ -1779,6 +1777,14 @@ testJoinConn_ viaProxy sndSecure a bId b connReq = do
   get b ##> ("", aId, CON)
   exchangeGreetingsViaProxy viaProxy a bId b aId
 
+testInvitationShortLinkPrev :: HasCallStack => Bool -> Bool -> AgentClient -> AgentClient -> IO ()
+testInvitationShortLinkPrev viaProxy sndSecure a b = runRight_ $ do
+  let userData = UserLinkData "some user data"
+      newLinkData = UserInvLinkData userData
+  -- can't create short link with previous version
+  (bId, CCLink connReq Nothing) <- A.createConnection a NRMInteractive 1 True True SCMInvitation (Just newLinkData) Nothing CR.IKPQOn False SMSubscribe
+  testJoinConn_ viaProxy sndSecure a bId b connReq
+
 testInvitationShortLinkAsync :: HasCallStack => Bool -> AgentClient -> AgentClient -> IO ()
 testInvitationShortLinkAsync viaProxy a b = do
   let userData = UserLinkData "some user data"
@@ -2738,117 +2744,6 @@ testRatchetSyncSimultaneous ps = do
   disposeAgentClient bob
   disposeAgentClient bob2
 
-testRatchetSyncReplayedKey :: HasCallStack => (ASrvTransport, AStoreType) -> IO ()
-testRatchetSyncReplayedKey ps = withAgentClients2 $ \alice bob -> do
-  (aliceId, bobId, bob2) <- withSmpServerStoreMsgLogOn ps testPort $ \_ ->
-    setupDesynchronizedRatchet alice bob
-  ("", "", DOWN _ _) <- nGet alice
-  ("", "", DOWN _ _) <- nGet bob2
-  _ <- runRight $ synchronizeRatchet bob2 aliceId PQSupportOn False
-  Right pks <- withTransaction (store $ agentEnv bob2) (`getRatchetX3dhKeys` aliceId)
-  Right (SomeConn _ (DuplexConnection _ _ (sq :| _))) <- withTransaction (store $ agentEnv bob2) (`getConn` aliceId)
-  withSmpServerStoreMsgLogOn ps testPort $ \_ -> do
-    concurrently_
-      (getInAnyOrder alice [ratchetSyncP' bobId RSAgreed, serverUpP])
-      (getInAnyOrder bob2 [ratchetSyncP' aliceId RSAgreed, serverUpP])
-    get alice =##> ratchetSyncP bobId RSOk
-    get bob2 =##> ratchetSyncP aliceId RSOk
-    withTransaction (store $ agentEnv alice) $ \db -> deleteRatchetKeyHashesExpired db 0 100
-    let keyMsg = AgentRatchetKey {agentVersion = currentSMPAgentVersion, e2eEncryption = CR.mkRcvE2ERatchetParams CR.currentE2EEncryptVersion pks, info = ""}
-    Right _ <- runReaderT (runExceptT $ sendAgentMessage bob2 sq SMP.noMsgFlags $ smpEncode keyMsg) (agentEnv bob2)
-    runRight_ $ exchangeGreetingsMsgIds alice bobId 10 bob2 aliceId 7
-  disposeAgentClient bob2
-
-testRatchetSyncRepeated :: HasCallStack => (ASrvTransport, AStoreType) -> IO ()
-testRatchetSyncRepeated ps = withAgentClients2 $ \alice bob -> do
-  (aliceId, bobId, bob2) <- startRatchetSyncOffline ps alice bob
-  ConnectionStats {ratchetSyncState = rss2} <- runRight $ synchronizeRatchet bob2 aliceId PQSupportOn True
-  rss2 `shouldBe` RSStarted
-
-  withSmpServerStoreMsgLogOn ps testPort $ \_ -> do
-    concurrently_
-      (getInAnyOrder alice [ratchetSyncP' bobId RSAgreed, serverUpP])
-      (getInAnyOrder bob2 [ratchetSyncP' aliceId RSAgreed, serverUpP])
-    runRight_ $ do
-      get alice =##> ratchetSyncP bobId RSAgreed
-      get alice =##> ratchetSyncP bobId RSOk
-      get bob2 =##> ratchetSyncP aliceId RSOk
-      msgId <- sendMessage alice bobId SMP.noMsgFlags "hello"
-      get alice ##> ("", bobId, SENT msgId)
-      get bob2 =##> \case ("", c, Msg "hello") -> c == aliceId; _ -> False
-      ackMessage bob2 aliceId 8 Nothing
-  map fst <$> processedRatchetKeyHashes bob2 `shouldReturn` [aliceId, aliceId]
-  disposeAgentClient bob2
-
-testRatchetSyncFailedKeyNotProcessed :: HasCallStack => (ASrvTransport, AStoreType) -> IO ()
-testRatchetSyncFailedKeyNotProcessed ps = withAgentClients2 $ \alice bob -> do
-  (aliceId, bobId, bob2) <- startRatchetSyncOffline ps alice bob
-  withTransaction (store $ agentEnv bob2) $ \db ->
-    DB.execute_ db "UPDATE ratchets SET x3dh_priv_key_1 = NULL"
-
-  withSmpServerStoreMsgLogOn ps testPort $ \_ ->
-    concurrently_
-      (getInAnyOrder alice [ratchetSyncP' bobId RSAgreed, serverUpP])
-      (getInAnyOrder bob2 [x3dhKeysNotFoundP aliceId, serverUpP])
-  map fst <$> processedRatchetKeyHashes alice `shouldReturn` [bobId]
-  processedRatchetKeyHashes bob2 `shouldReturn` []
-  disposeAgentClient bob2
-  where
-    x3dhKeysNotFoundP :: ConnId -> ATransmission -> Bool
-    x3dhKeysNotFoundP cId = \case
-      (_, cId', AEvt SAEConn (ERR (A.INTERNAL e))) -> cId' == cId && "SEX3dhKeysNotFound" `isPrefixOf` e
-      _ -> False
-
-testRatchetSyncFailedRecreationNoReply :: HasCallStack => (ASrvTransport, AStoreType) -> IO ()
-testRatchetSyncFailedRecreationNoReply ps = withAgentClients2 $ \alice bob -> do
-  (_, bobId, bob2) <- startRatchetSyncOffline ps alice bob
-  aliceSndMsgs <- sndMessages alice
-  withTransaction (store $ agentEnv alice) $ \db ->
-    DB.execute_ db "CREATE TRIGGER fail_ratchet_insert BEFORE INSERT ON ratchets BEGIN SELECT RAISE(ABORT, 'ratchet insert failed'); END"
-  withSmpServerStoreMsgLogOn ps testPort $ \_ ->
-    concurrently_
-      (getInAnyOrder alice [ratchetInsertFailedP bobId, serverUpP])
-      (getInAnyOrder bob2 [serverUpP])
-  processedRatchetKeyHashes alice `shouldReturn` []
-  sndMessages alice `shouldReturn` aliceSndMsgs
-  disposeAgentClient bob2
-  where
-    ratchetInsertFailedP :: ConnId -> ATransmission -> Bool
-    ratchetInsertFailedP cId = \case
-      (_, cId', AEvt SAEConn (ERR (A.INTERNAL e))) -> cId' == cId && "ratchet insert failed" `isInfixOf` e
-      _ -> False
-
-testRatchetSyncStartFailedNoKey :: HasCallStack => (ASrvTransport, AStoreType) -> IO ()
-testRatchetSyncStartFailedNoKey ps = withAgentClients2 $ \alice bob -> do
-  (aliceId, _, bob2) <- withSmpServerStoreMsgLogOn ps testPort $ \_ ->
-    setupDesynchronizedRatchet alice bob
-  bobSndMsgs <- sndMessages bob2
-  withTransaction (store $ agentEnv bob2) $ \db ->
-    DB.execute_ db "CREATE TRIGGER fail_ratchet_update BEFORE UPDATE ON ratchets BEGIN SELECT RAISE(ABORT, 'ratchet update failed'); END"
-  Left (A.INTERNAL e) <- runExceptT $ synchronizeRatchet bob2 aliceId PQSupportOff False
-  e `shouldContain` "ratchet update failed"
-  ConnectionStats {ratchetSyncState} <- runRight $ getConnectionServers bob2 aliceId
-  ratchetSyncState `shouldBe` RSRequired
-  withTransaction (store $ agentEnv bob2) (`DB.query_` "SELECT conn_id, pq_support FROM connections") `shouldReturn` [(aliceId, PQSupportOn)]
-  sndMessages bob2 `shouldReturn` bobSndMsgs
-  disposeAgentClient bob2
-
-startRatchetSyncOffline :: HasCallStack => (ASrvTransport, AStoreType) -> AgentClient -> AgentClient -> IO (ConnId, ConnId, AgentClient)
-startRatchetSyncOffline ps alice bob = do
-  (aliceId, bobId, bob2) <- withSmpServerStoreMsgLogOn ps testPort $ \_ ->
-    setupDesynchronizedRatchet alice bob
-  ("", "", DOWN _ _) <- nGet alice
-  ("", "", DOWN _ _) <- nGet bob2
-  ConnectionStats {ratchetSyncState} <- runRight $ synchronizeRatchet bob2 aliceId PQSupportOn False
-  ratchetSyncState `shouldBe` RSStarted
-  pure (aliceId, bobId, bob2)
-
-processedRatchetKeyHashes :: AgentClient -> IO [(ConnId, ByteString)]
-processedRatchetKeyHashes c = withTransaction (store $ agentEnv c) (`DB.query_` "SELECT conn_id, hash FROM processed_ratchet_key_hashes")
-
-sndMessages :: AgentClient -> IO [(ConnId, Int64)]
-sndMessages c = withTransaction (store $ agentEnv c) (`DB.query_` "SELECT conn_id, internal_id FROM snd_messages ORDER BY conn_id, internal_id")
-
 getMsg :: AgentClient -> ConnId -> ExceptT AgentErrorType IO a -> ExceptT AgentErrorType IO a
 getMsg c cId action = do
   liftIO $ noMessages c "nothing should be delivered before GET"
@@ -4792,31 +4687,9 @@ testWaitForUserNetwork = withAgent 1 aCfg initAgentServers testDB $ \a -> do
     (threadDelay 50000 >> setUserNetworkInfo a (UserNetworkInfo UNCellular True))
     (networkDelay a 50000)
   noNetworkDelay a
-  -- the agent is disposed, so that the workers the network events resumed do not use the database
-  -- of the test that runs next - they share the file
-  disposeAgentClient a
   where
     aCfg = agentCfg {userNetworkInterval = 100000, userOfflineDelay = 0}
 
-testNetworkChangeReconnect :: HasCallStack => (ASrvTransport, AStoreType) -> IO ()
-testNetworkChangeReconnect ps =
-  withAgentClientsCfg2 agentCfg {userOfflineDelay = 0} agentCfg $ \a b -> withSmpServer ps $ do
-    (aId, bId) <- runRight $ makeConnection a b
-    -- network type changed while online - connections to servers are re-established
-    setUserNetworkInfo a $ UserNetworkInfo UNCellular True
-    nGet a =##> \case ("", "", DOWN _ [c]) -> c == bId; _ -> False
-    nGet a =##> \case ("", "", UP _ [c]) -> c == bId; _ -> False
-    -- the same network type reported again (the client only reports it when the network changes) - reconnects
-    setUserNetworkInfo a $ UserNetworkInfo UNCellular True
-    nGet a =##> \case ("", "", DOWN _ [c]) -> c == bId; _ -> False
-    nGet a =##> \case ("", "", UP _ [c]) -> c == bId; _ -> False
-    setUserNetworkInfo a $ UserNetworkInfo UNNone False
-    noMessages a "no reconnection when offline"
-    setUserNetworkInfo a $ UserNetworkInfo UNWifi True
-    nGet a =##> \case ("", "", DOWN _ [c]) -> c == bId; _ -> False
-    nGet a =##> \case ("", "", UP _ [c]) -> c == bId; _ -> False
-    runRight_ $ exchangeGreetings a bId b aId
-
 testDoNotResetOnlineToOffline :: IO ()
 testDoNotResetOnlineToOffline = withAgent 1 aCfg initAgentServers testDB $ \a -> do
   noNetworkDelay a
@@ -4835,7 +4708,6 @@ testDoNotResetOnlineToOffline = withAgent 1 aCfg initAgentServers testDB $ \a ->
   setUserNetworkInfo a $ UserNetworkInfo UNWifi True
   setUserNetworkInfo a $ UserNetworkInfo UNNone False -- ingnored
   noNetworkDelay a
-  disposeAgentClient a
   where
     aCfg = agentCfg {userNetworkInterval = 100000, userOfflineDelay = 0.1}
 
@@ -4857,7 +4729,6 @@ testResumeMultipleThreads = withAgent 1 aCfg initAgentServers testDB $ \a -> do
   let average = sum ts `div` fromIntegral (length ts)
   average < 3000000 `shouldBe` True
   maximum ts < 4000000 `shouldBe` True
-  disposeAgentClient a
   where
     aCfg = agentCfg {userOfflineDelay = 0}
 

tests/AgentTests/SQLiteTests.hs

@@ -20,13 +20,12 @@ import Control.Concurrent.Async (concurrently_)
 import Control.Concurrent.MVar
 import Control.Concurrent.STM
 import Control.Exception (SomeException)
-import Control.Monad (forM_, replicateM_)
+import Control.Monad (replicateM_)
 import Control.Monad.Trans.Except
 import Crypto.Random (ChaChaDRG)
 import Data.ByteArray (ScrubbedBytes)
 import Data.ByteString.Char8 (ByteString)
 import Data.List (isInfixOf)
-import qualified Data.Map.Strict as M
 import qualified Data.Text as T
 import Data.Text.Encoding (encodeUtf8)
 import Data.Time
@@ -52,7 +51,6 @@ import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Crypto.File (CryptoFile (..))
 import Simplex.Messaging.Crypto.Ratchet (pattern IKPQOn)
 import qualified Simplex.Messaging.Crypto.Ratchet as CR
-import Simplex.Messaging.Encoding (Encoding (..))
 import Simplex.Messaging.Encoding.String (StrEncoding (..))
 import Simplex.Messaging.Protocol (EntityId (..), QueueMode (..), SubscriptionMode (..), pattern VersionSMPC)
 import qualified Simplex.Messaging.Protocol as SMP
@@ -137,8 +135,6 @@ storeTests = do
           testCreateRcvMsg
           testCreateSndMsg
           testCreateRcvAndSndMsgs
-      describe "deleteRatchetKeyHashesExpired" testDeleteRatchetKeyHashesExpired
-      it "should keep only the newest skipped message keys" testGetSkippedMsgKeys
       describe "Work items" $ do
         it "should getPendingQueueMsg" testGetPendingQueueMsg
         it "should getPendingServerCommand" testGetPendingServerCommand
@@ -603,42 +599,6 @@ testCreateRcvAndSndMsgs =
       testCreateSndMsg_ db "snd_hash_1" connId sq $ mkSndMsgData (InternalId 5) (InternalSndId 2) "snd_hash_2"
       testCreateSndMsg_ db "snd_hash_2" connId sq $ mkSndMsgData (InternalId 6) (InternalSndId 3) "snd_hash_3"
 
-testDeleteRatchetKeyHashesExpired :: SpecWith DBStore
-testDeleteRatchetKeyHashesExpired =
-  it "should delete expired ratchet key hashes except the newest in each connection" . withStoreTransaction $ \db -> do
-    g <- C.newRandom
-    Right connId <- createNewConn db g cData1 {connId = ""} SCMInvitation
-    Right connId' <- createNewConn db g cData1 {connId = ""} SCMContact
-    let hashes = ["h1", "h2", "h3", "h4", "h5", "h6"]
-    forM_ hashes $ addProcessedRatchetKeyHash db connId
-    forM_ (take 4 hashes) $ addProcessedRatchetKeyHash db connId'
-    deleteRatchetKeyHashesExpired db 86400 4
-    mapM (checkRatchetKeyHashExists db connId) hashes `shouldReturn` replicate 6 True
-    deleteRatchetKeyHashesExpired db 0 4
-    mapM (checkRatchetKeyHashExists db connId) hashes `shouldReturn` [False, False, True, True, True, True]
-    mapM (checkRatchetKeyHashExists db connId') (take 4 hashes) `shouldReturn` replicate 4 True
-
-testGetSkippedMsgKeys :: DBStore -> Expectation
-testGetSkippedMsgKeys st = do
-  g <- C.newRandom
-  withTransaction st $ \db -> do
-    Right connId <- createNewConn db g cData1 {connId = ""} SCMInvitation
-    Right connId' <- createNewConn db g cData1 {connId = ""} SCMInvitation
-    createSkippedKeys db connId'
-    createSkippedKeys db connId
-    M.map M.keys <$> getSkippedMsgKeys db connId 4
-      `shouldReturn` M.singleton (C.Key "header_key") [1, 2, 3, 4]
-    getMsgNs db connId `shouldReturn` [1 .. 4]
-    getMsgNs db connId' `shouldReturn` [1 .. 10]
-  where
-    createSkippedKeys :: DB.Connection -> ConnId -> IO ()
-    createSkippedKeys db connId = do
-      DB.execute db "INSERT INTO ratchets (conn_id) VALUES (?)" (Only connId)
-      forM_ ([10, 9 .. 1] :: [Int]) $ \msgN ->
-        DB.execute db "INSERT INTO skipped_messages (conn_id, header_key, msg_n, msg_key) VALUES (?, ?, ?, ?)" (connId, "header_key" :: ByteString, msgN, smpEncode ("key" :: ByteString, "iv" :: ByteString))
-    getMsgNs :: DB.Connection -> ConnId -> IO [Int]
-    getMsgNs db connId = map fromOnly <$> DB.query db "SELECT msg_n FROM skipped_messages WHERE conn_id = ? ORDER BY msg_n" (Only connId)
-
 testCloseReopenStore :: IO ()
 testCloseReopenStore = do
   st <- createStore'

tests/AgentTests/SchemaDump.hs

@@ -48,7 +48,6 @@ schemaDumpTest = do
   it "verify strict tables" testVerifyStrict
   it "should NOT create user record for new database" testUsersMigrationNew
   it "should create user record for old database" testUsersMigrationOld
-  it "should remove duplicate ratchet key hashes before adding unique index" testRatchetKeyHashesUniqueMigration
 
 testVerifySchemaDump :: IO ()
 testVerifySchemaDump = do
@@ -115,28 +114,12 @@ testUsersMigrationOld = do
     `shouldReturn` ([Only (1 :: Int)])
   closeDBStore st'
 
-testRatchetKeyHashesUniqueMigration :: IO ()
-testRatchetKeyHashesUniqueMigration = do
-  let beforeUnique = takeWhile (("m20260929_ratchet_indexes" /=) . name) appMigrations
-  Right st <- createDBStore (DBOpts testDB [] "" False True TQOff) beforeUnique (MigrationConfig MCError Nothing)
-  withTransaction' st $ \db -> do
-    SQL.execute_ db "INSERT INTO users (user_id) VALUES (1)"
-    SQL.execute_ db "INSERT INTO connections (conn_id, conn_mode, user_id) VALUES (x'01', 'INV', 1), (x'02', 'INV', 1)"
-    SQL.execute_ db "INSERT INTO processed_ratchet_key_hashes (conn_id, hash) VALUES (x'01', x'aa'), (x'01', x'aa'), (x'01', x'bb'), (x'02', x'aa'), (x'01', x'aa')"
-  closeDBStore st
-  Right st' <- createDBStore (DBOpts testDB [] "" False True TQOff) appMigrations (MigrationConfig MCYesUp Nothing)
-  withTransaction' st' (`SQL.query_` "SELECT processed_ratchet_key_hash_id FROM processed_ratchet_key_hashes ORDER BY processed_ratchet_key_hash_id")
-    `shouldReturn` [Only (1 :: Int), Only 3, Only 4]
-  closeDBStore st'
-
 skipComparisonForDownMigrations :: [String]
 skipComparisonForDownMigrations =
   [ -- on down migration idx_messages_internal_snd_id_ts index moves down to the end of the file
     "m20230814_indexes",
     -- snd_secure and last_broker_ts columns swap order on down migration
-    "m20250322_short_links",
-    -- on down migration idx_processed_ratchet_key_hashes_hash index moves down to the end of the file
-    "m20260929_ratchet_indexes"
+    "m20250322_short_links"
   ]
 
 getSchema :: FilePath -> FilePath -> IO String

tests/CLITests.hs

@@ -108,6 +108,8 @@ smpServerTest storeLog basicAuth = do
   lookupValue "TRANSPORT" "websockets" ini `shouldBe` Right "off"
   lookupValue "AUTH" "new_queues" ini `shouldBe` Right "on"
   lookupValue "INACTIVE_CLIENTS" "disconnect" ini `shouldBe` Right "on"
+  lookupValue "ADDRESS_STATS" "enable" ini `shouldBe` Right "off"
+  lookupValue "ADDRESS_STATS" "period" ini `shouldBe` Right "300"
   doesFileExist (cfgPath <> "/ca.key") `shouldReturn` True
   -- start
   r <- lines <$> capture_ (withArgs ["start"] $ (100000 `timeout` smpServerCLI cfgPath logPath) `catchAll_` pure (Just ()))
@@ -234,6 +236,8 @@ ntfServerTest storeLog = do
   lookupValue "STORE_LOG" "log_stats" ini `shouldBe` Right "off"
   lookupValue "TRANSPORT" "port" ini `shouldBe` Right "443"
   lookupValue "TRANSPORT" "websockets" ini `shouldBe` Right "off"
+  lookupValue "ADDRESS_STATS" "enable" ini `shouldBe` Right "off"
+  lookupValue "ADDRESS_STATS" "period" ini `shouldBe` Right "300"
   doesFileExist (ntfCfgPath <> "/ca.key") `shouldReturn` True
   r <- lines <$> capture_ (withArgs ["start"] $ (100000 `timeout` ntfServerCLI ntfCfgPath ntfLogPath) `catchAll_` pure (Just ()))
   r `shouldContain` ["SMP notifications server v" <> simplexmqVersionCommit]
@@ -252,6 +256,8 @@ xftpServerTest storeLog = do
   lookupValue "STORE_LOG" "enable" ini `shouldBe` Right (if storeLog then "on" else "off")
   lookupValue "STORE_LOG" "log_stats" ini `shouldBe` Right "off"
   lookupValue "TRANSPORT" "port" ini `shouldBe` Right "443"
+  lookupValue "ADDRESS_STATS" "enable" ini `shouldBe` Right "off"
+  lookupValue "ADDRESS_STATS" "period" ini `shouldBe` Right "300"
   doesFileExist (fileCfgPath <> "/ca.key") `shouldReturn` True
   r <- lines <$> capture_ (withArgs ["start"] $ (100000 `timeout` xftpServerCLI fileCfgPath fileLogPath) `catchAll_` pure (Just ()))
   r `shouldContain` ["SimpleX XFTP server v" <> simplexmqVersionCommit]

tests/CoreTests/AddressStatsTests.hs

@@ -0,0 +1,326 @@
+{-# LANGUAGE CPP #-}
+{-# LANGUAGE LambdaCase #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE ScopedTypeVariables #-}
+
+module CoreTests.AddressStatsTests where
+
+import Data.ByteString.Char8 (ByteString)
+import qualified Data.ByteString.Char8 as B
+import Data.IORef (readIORef)
+import Data.List.NonEmpty (NonEmpty (..))
+import qualified Data.Map.Strict as M
+import qualified Data.Set as S
+import Data.Text (Text)
+import qualified Data.Text as T
+import Data.Text.Encoding (decodeLatin1)
+import Network.Socket (SockAddr (..), tupleToHostAddress, tupleToHostAddress6)
+import qualified Simplex.FileTransfer.Protocol as XFTP
+import Simplex.FileTransfer.Server.Env (XFTPAddrCounter (..), xftpCmdCounter)
+import Simplex.FileTransfer.Transport (supportedFileServerVRange)
+import qualified Simplex.Messaging.Crypto as C
+import Simplex.Messaging.Protocol
+import Simplex.Messaging.Server.AddressStats
+import Simplex.Messaging.Server.Env.STM (SMPAddrCounter (..), smpCmdCounter)
+import Simplex.Messaging.SimplexName (SimplexDomain (..), SimplexTLD (..))
+import Simplex.Messaging.Transport (supportedClientSMPRelayVRange, supportedServerSMPRelayVRange)
+import Simplex.Messaging.Version (VersionRange (..))
+import Test.Hspec hiding (fit, it)
+import UnliftIO.STM
+import Util
+#if defined(dbServerPostgres)
+import qualified Simplex.Messaging.Notifications.Protocol as NTF
+import Simplex.Messaging.Notifications.Server.Env (NtfAddrCounter (..), ntfCmdCounter)
+import Simplex.Messaging.Notifications.Transport (supportedServerNTFVRange)
+#endif
+
+data TestCounter = TCConnections | TCSend | TCGet
+  deriving (Eq, Ord, Enum, Bounded, Show)
+
+instance AddrCounter TestCounter where
+  counterName = \case
+    TCConnections -> "connections"
+    TCSend -> "SEND"
+    TCGet -> "GET"
+  counterBounds _ = [1, 2, 5, 10]
+  connectionsCounter = TCConnections
+
+addr1, addr2, addr3, addr4 :: AddrKey
+addr1 = AKIPv4 1
+addr2 = AKIPv4 2
+addr3 = AKIPv4 3
+addr4 = AKIPv4 4
+
+addressStatsTests :: Spec
+addressStatsTests = do
+  describe "addrKey" addrKeyTests
+  describe "bounds" boundsTests
+  describe "counterByName" counterByNameTests
+  describe "openAddrStats" openAddrStatsTests
+  describe "rolloverAddrStats" rolloverTests
+  describe "topAddresses" topAddressesTests
+  describe "addrHistogramMetrics" metricsTests
+  describe "command counters" commandCounterTests
+
+addrKeyTests :: Spec
+addrKeyTests = do
+  it "should use IPv4 address" $
+    addrKeyText <$> addrKey (ipv4 (192, 168, 1, 2)) `shouldBe` Just "192.168.1.2"
+  it "should use IPv4 address of IPv4-mapped IPv6 address" $
+    addrKey (ipv6 (0, 0, 0, 0, 0, 0xffff, 0xc0a8, 0x0102)) `shouldBe` addrKey (ipv4 (192, 168, 1, 2))
+  it "should use one key for IPv6 addresses in one /64" $ do
+    addrKey (ipv6 (0x2001, 0xdb8, 1, 2, 3, 4, 5, 6)) `shouldBe` addrKey (ipv6 (0x2001, 0xdb8, 1, 2, 7, 8, 9, 10))
+    addrKeyText <$> addrKey (ipv6 (0x2001, 0xdb8, 1, 2, 3, 4, 5, 6)) `shouldBe` Just "2001:db8:1:2::/64"
+  it "should use different keys for IPv6 addresses in different /64" $
+    addrKey (ipv6 (0x2001, 0xdb8, 1, 2, 3, 4, 5, 6)) `shouldNotBe` addrKey (ipv6 (0x2001, 0xdb8, 1, 3, 3, 4, 5, 6))
+  it "should not use other address types" $
+    addrKey (SockAddrUnix "tests/tmp/socket") `shouldBe` Nothing
+  where
+    ipv4 a = SockAddrInet 443 $ tupleToHostAddress a
+    ipv6 a = SockAddrInet6 443 0 (tupleToHostAddress6 a) 0
+
+boundsTests :: Spec
+boundsTests = do
+  it "should use R10 values up to 1000000 for counts" $
+    countBounds
+      `shouldBe` [ 1, 2, 3, 4, 5, 6, 7, 8, 9,
+                   10, 13, 16, 20, 25, 32, 40, 50, 63, 80,
+                   100, 125, 160, 200, 250, 315, 400, 500, 630, 800,
+                   1000, 1250, 1600, 2000, 2500, 3150, 4000, 5000, 6300, 8000,
+                   10000, 12500, 16000, 20000, 25000, 31500, 40000, 50000, 63000, 80000,
+                   100000, 125000, 160000, 200000, 250000, 315000, 400000, 500000, 630000, 800000,
+                   1000000
+                 ]
+  it "should use R10 values up to 100000000 for kilobytes" $ do
+    take 60 kilobyteBounds `shouldBe` countBounds
+    drop 59 kilobyteBounds
+      `shouldBe` [ 1000000, 1250000, 1600000, 2000000, 2500000, 3150000, 4000000, 5000000, 6300000, 8000000,
+                   10000000, 12500000, 16000000, 20000000, 25000000, 31500000, 40000000, 50000000, 63000000, 80000000,
+                   100000000
+                 ]
+
+counterByNameTests :: Spec
+counterByNameTests = do
+  it "should find SMP counters" $ testCounterNames [minBound .. maxBound :: SMPAddrCounter]
+  it "should find XFTP counters" $ testCounterNames [minBound .. maxBound :: XFTPAddrCounter]
+#if defined(dbServerPostgres)
+  it "should find NTF counters" $ testCounterNames [minBound .. maxBound :: NtfAddrCounter]
+#endif
+  it "should not find unknown counter" $
+    counterByName "unknown" `shouldBe` (Nothing :: Maybe SMPAddrCounter)
+  where
+    testCounterNames :: (AddrCounter c, Show c) => [c] -> Expectation
+    testCounterNames cs = map (counterByName . counterName) cs `shouldBe` map Just cs
+
+openAddrStatsTests :: Spec
+openAddrStatsTests =
+  it "should count connections of one address in one entry" $ do
+    ServerAddrStats {addrStatsMap = m} <- newServerAddrStats
+    s <- openAddrStats m addr1
+    s' <- openAddrStats m addr1
+    readTVarIO (connectionsCount s) `shouldReturn` 2
+    counts s TCConnections `shouldReturn` (0, 2)
+    closeAddrStats s'
+    readTVarIO (connectionsCount s) `shouldReturn` 1
+
+rolloverTests :: Spec
+rolloverTests = do
+  it "should add non-zero closing counts to histograms" $ do
+    stats@ServerAddrStats {addrStatsMap = m, addrHistograms} <- newServerAddrStats
+    s1 <- openAddrStats m addr1
+    s2 <- openAddrStats m addr2
+    addAddrCounter s1 TCSend 3
+    addAddrCounter s2 TCSend 7
+    rolloverAddrStats stats
+    readIORef addrHistograms
+      `shouldReturn` M.fromList
+        [ (TCConnections, AddrHistogram [2, 2, 2, 2] 2 2 1),
+          (TCSend, AddrHistogram [0, 0, 1, 2] 10 2 7),
+          (TCGet, AddrHistogram [0, 0, 0, 0] 0 0 0)
+        ]
+    addAddrCounter s1 TCSend 20
+    rolloverAddrStats stats
+    readIORef addrHistograms
+      `shouldReturn` M.fromList
+        [ (TCConnections, AddrHistogram [2, 2, 2, 2] 2 2 0),
+          (TCSend, AddrHistogram [0, 0, 1, 2] 30 3 20),
+          (TCGet, AddrHistogram [0, 0, 0, 0] 0 0 0)
+        ]
+  it "should set previous counts to closing counts" $ do
+    stats@ServerAddrStats {addrStatsMap = m} <- newServerAddrStats
+    s <- openAddrStats m addr1
+    addAddrCounter s TCSend 3
+    counts s TCSend `shouldReturn` (0, 3)
+    rolloverAddrStats stats
+    counts s TCSend `shouldReturn` (3, 0)
+    addAddrCounter s TCSend 5
+    rolloverAddrStats stats
+    counts s TCSend `shouldReturn` (5, 0)
+    rolloverAddrStats stats
+    counts s TCSend `shouldReturn` (0, 0)
+  it "should keep entries with open connections or closing counts, and delete other entries" $ do
+    stats@ServerAddrStats {addrStatsMap = m} <- newServerAddrStats
+    _ <- openAddrStats m addr1
+    s2 <- openAddrStats m addr2
+    s3 <- openAddrStats m addr3
+    closeAddrStats s3
+    rolloverAddrStats stats
+    M.keys <$> readTVarIO m `shouldReturn` [addr1, addr2, addr3]
+    addAddrCounter s2 TCSend 1
+    closeAddrStats s2
+    rolloverAddrStats stats
+    M.keys <$> readTVarIO m `shouldReturn` [addr1, addr2]
+    rolloverAddrStats stats
+    M.keys <$> readTVarIO m `shouldReturn` [addr1]
+
+topAddressesTests :: Spec
+topAddressesTests =
+  it "should return addresses with non-zero counts, sorted by the sum of previous and current counts" $ do
+    stats@ServerAddrStats {addrStatsMap = m} <- newServerAddrStats
+    [s1, s2, s3, _] <- mapM (openAddrStats m) [addr1, addr2, addr3, addr4]
+    addAddrCounter s1 TCSend 3
+    addAddrCounter s2 TCSend 7
+    rolloverAddrStats stats
+    addAddrCounter s1 TCSend 5
+    addAddrCounter s3 TCSend 10
+    topAddresses m TCSend 10 `shouldReturn` [(addr3, 0, 10), (addr1, 3, 5), (addr2, 7, 0)]
+    topAddresses m TCSend 2 `shouldReturn` [(addr3, 0, 10), (addr1, 3, 5)]
+
+metricsTests :: Spec
+metricsTests =
+  it "should encode histograms and maximums as Prometheus metrics" $
+    addrHistogramMetrics "simplex_test" "1767225600000" histograms
+      `shouldBe` T.unlines
+        [ "# Client addresses",
+          "# ----------------",
+          "",
+          "# HELP simplex_test_client_address_period_count Counts of client addresses per period",
+          "# TYPE simplex_test_client_address_period_count histogram",
+          "simplex_test_client_address_period_count_bucket{counter=\"SEND\",le=\"1\"} 0 1767225600000",
+          "simplex_test_client_address_period_count_bucket{counter=\"SEND\",le=\"2\"} 0 1767225600000",
+          "simplex_test_client_address_period_count_bucket{counter=\"SEND\",le=\"5\"} 1 1767225600000",
+          "simplex_test_client_address_period_count_bucket{counter=\"SEND\",le=\"10\"} 2 1767225600000",
+          "simplex_test_client_address_period_count_bucket{counter=\"SEND\",le=\"+Inf\"} 2 1767225600000",
+          "simplex_test_client_address_period_count_sum{counter=\"SEND\"} 10 1767225600000",
+          "simplex_test_client_address_period_count_count{counter=\"SEND\"} 2 1767225600000",
+          "simplex_test_client_address_period_count_bucket{counter=\"GET\",le=\"1\"} 0 1767225600000",
+          "simplex_test_client_address_period_count_bucket{counter=\"GET\",le=\"2\"} 0 1767225600000",
+          "simplex_test_client_address_period_count_bucket{counter=\"GET\",le=\"5\"} 0 1767225600000",
+          "simplex_test_client_address_period_count_bucket{counter=\"GET\",le=\"10\"} 0 1767225600000",
+          "simplex_test_client_address_period_count_bucket{counter=\"GET\",le=\"+Inf\"} 1 1767225600000",
+          "simplex_test_client_address_period_count_sum{counter=\"GET\"} 12 1767225600000",
+          "simplex_test_client_address_period_count_count{counter=\"GET\"} 1 1767225600000",
+          "",
+          "# HELP simplex_test_client_address_period_max Maximum count of a client address in the last period",
+          "# TYPE simplex_test_client_address_period_max gauge",
+          "simplex_test_client_address_period_max{counter=\"SEND\"} 7 1767225600000",
+          "simplex_test_client_address_period_max{counter=\"GET\"} 12 1767225600000",
+          ""
+        ]
+  where
+    histograms =
+      M.fromList
+        [ (TCSend, AddrHistogram [0, 0, 1, 2] 10 2 7),
+          (TCGet, AddrHistogram [0, 0, 0, 0] 12 1 12)
+        ]
+
+commandCounterTests :: Spec
+commandCounterTests = do
+  it "should count each SMP command in the counter named by its tag" $ do
+    cmds <- smpCommands
+    map (counterName . smpCmdCounter) cmds `shouldBe` map (commandTag . encodeProtocol (maxVersion supportedServerSMPRelayVRange)) cmds
+    S.fromList (map smpCmdCounter cmds) `shouldBe` S.fromList [SACNew .. SACRslv]
+  it "should count each XFTP command in the counter named by its tag" $ do
+    cmds <- xftpCommands
+    map (counterName . xftpCmdCounter) cmds `shouldBe` map (commandTag . encodeProtocol (maxVersion supportedFileServerVRange)) cmds
+    S.fromList (map xftpCmdCounter cmds) `shouldBe` S.fromList [XACFNew .. XACPing]
+#if defined(dbServerPostgres)
+  it "should count each NTF command in the counter named by its tag" $ do
+    cmds <- ntfCommands
+    map (counterName . ntfCmdCounter) cmds `shouldBe` map (commandTag . encodeProtocol (maxVersion supportedServerNTFVRange)) cmds
+    S.fromList (map ntfCmdCounter cmds) `shouldBe` S.fromList [NACTNew .. NACPing]
+#endif
+  where
+    commandTag :: ByteString -> Text
+    commandTag = decodeLatin1 . B.takeWhile (/= ' ')
+
+counts :: AddrStats TestCounter -> TestCounter -> IO (Int, Int)
+counts AddrStats {previous, current} c = (,) <$> readIORef (previous M.! c) <*> readIORef (current M.! c)
+
+testKeys :: IO (C.APublicAuthKey, C.APrivateAuthKey, C.PublicKeyX25519)
+testKeys = do
+  g <- C.newRandom
+  (authKey, authPrivKey) <- atomically $ C.generateAuthKeyPair C.SEd25519 g
+  (dhKey, _ :: C.PrivateKeyX25519) <- atomically $ C.generateKeyPair g
+  pure (authKey, authPrivKey, dhKey)
+
+testSMPServer :: SMPServer
+testSMPServer = SMPServer "localhost" "5001" (C.KeyHash "hash")
+
+smpCommands :: IO [Cmd]
+smpCommands = do
+  (authKey, _, dhKey) <- testKeys
+  let newQueue = NewQueueReq {rcvAuthKey = authKey, rcvDhKey = dhKey, auth_ = Nothing, subMode = SMSubscribe, queueReqData = Nothing, ntfCreds = Nothing}
+      linkData = (EncDataBytes "fixed", EncDataBytes "user")
+      name = NQDomain SimplexDomain {nameTLD = TLDSimplex, domain = "alice", subDomain = []}
+  pure
+    [ Cmd SCreator $ NEW newQueue,
+      Cmd SRecipient SUB,
+      Cmd SRecipientService $ SUBS 1 mempty,
+      Cmd SRecipient $ KEY authKey,
+      Cmd SRecipient $ RKEY (authKey :| []),
+      Cmd SRecipient $ LSET (EntityId "link") linkData,
+      Cmd SRecipient LDEL,
+      Cmd SRecipient $ NKEY authKey dhKey,
+      Cmd SRecipient NDEL,
+      Cmd SRecipient GET,
+      Cmd SRecipient $ ACK "message",
+      Cmd SRecipient OFF,
+      Cmd SRecipient DEL,
+      Cmd SRecipient QUE,
+      Cmd SSender $ SKEY authKey,
+      Cmd SSender $ SEND noMsgFlags "hello",
+      Cmd SIdleClient PING,
+      Cmd SSenderLink $ LKEY authKey,
+      Cmd SSenderLink LGET,
+      Cmd SNotifier NSUB,
+      Cmd SNotifierService $ NSUBS 1 mempty,
+      Cmd SProxiedClient $ PRXY testSMPServer Nothing,
+      Cmd SProxiedClient $ PFWD (maxVersion supportedClientSMPRelayVRange) dhKey (EncTransmission "transmission"),
+      Cmd SProxyService $ RFWD (EncFwdTransmission "transmission"),
+      Cmd SResolver $ RSLV name
+    ]
+
+xftpCommands :: IO [XFTP.FileCmd]
+xftpCommands = do
+  (authKey, _, dhKey) <- testKeys
+  pure
+    [ XFTP.FileCmd XFTP.SFSender $ XFTP.FNEW (XFTP.FileInfo authKey 65536 "digest") (authKey :| []) Nothing Nothing,
+      XFTP.FileCmd XFTP.SFSender $ XFTP.FADD (authKey :| []),
+      XFTP.FileCmd XFTP.SFSender XFTP.FPUT,
+      XFTP.FileCmd XFTP.SFSender XFTP.FDEL,
+      XFTP.FileCmd XFTP.SFRecipient $ XFTP.FGET dhKey,
+      XFTP.FileCmd XFTP.SFRecipient XFTP.FACK,
+      XFTP.FileCmd XFTP.SFRecipient XFTP.PING
+    ]
+
+#if defined(dbServerPostgres)
+ntfCommands :: IO [NTF.NtfCmd]
+ntfCommands = do
+  (authKey, authPrivKey, dhKey) <- testKeys
+  let token = NTF.DeviceToken NTF.PPApnsTest "token"
+      queue = NTF.SMPQueueNtf testSMPServer (EntityId "notifier")
+  pure
+    [ NTF.NtfCmd NTF.SToken $ NTF.TNEW $ NTF.NewNtfTkn token authKey dhKey,
+      NTF.NtfCmd NTF.SToken $ NTF.TVFY $ NTF.NtfRegCode "code",
+      NTF.NtfCmd NTF.SToken NTF.TCHK,
+      NTF.NtfCmd NTF.SToken $ NTF.TRPL token,
+      NTF.NtfCmd NTF.SToken NTF.TDEL,
+      NTF.NtfCmd NTF.SToken $ NTF.TCRN 20,
+      NTF.NtfCmd NTF.SSubscription $ NTF.SNEW $ NTF.NewNtfSub (EntityId "token") queue authPrivKey,
+      NTF.NtfCmd NTF.SSubscription NTF.SCHK,
+      NTF.NtfCmd NTF.SSubscription NTF.SDEL,
+      NTF.NtfCmd NTF.SSubscription NTF.PING
+    ]
+#endif

tests/CoreTests/CryptoTests.hs

@@ -6,9 +6,8 @@
 
 module CoreTests.CryptoTests (cryptoTests) where
 
-import Control.Concurrent (forkIO, newEmptyMVar, putMVar, takeMVar)
 import Control.Concurrent.STM
-import Control.Exception (bracket, evaluate)
+import Control.Exception (evaluate)
 import Control.Monad.Except
 import qualified Data.Aeson as J
 import qualified Data.ByteString.Char8 as B
@@ -23,12 +22,9 @@ import Data.Time.Clock (UTCTime (..))
 import qualified Data.Text.Lazy as LT
 import qualified Data.Text.Lazy.Encoding as LE
 import Data.Type.Equality
-import Data.Word (Word8)
 import qualified Data.X509 as X
 import qualified Data.X509.CertificateStore as XS
 import qualified Data.X509.Validation as XV
-import Foreign (FunPtr, allocaBytes, fillBytes, freeHaskellFunPtr, nullPtr)
-import Foreign.C.Types (CInt, CSize (..))
 import qualified SMPClient
 import qualified Simplex.Messaging.Crypto as C
 import qualified Simplex.Messaging.Crypto.Lazy as LC
@@ -36,12 +32,9 @@ import Simplex.Messaging.Crypto.BBS
 import Simplex.Messaging.Crypto.Entitlement
 import Simplex.Messaging.Crypto.SNTRUP761.Bindings
 import Simplex.Messaging.Crypto.SNTRUP761.Bindings.Defines
-import Simplex.Messaging.Crypto.SNTRUP761.Bindings.FFI (c_sntrup761_keypair)
-import Simplex.Messaging.Crypto.SNTRUP761.Bindings.RNG (RNGFunc)
 import Simplex.Messaging.Encoding (Large (..), smpDecode, smpEncode)
 import Simplex.Messaging.Encoding.String (strDecode, strEncode)
 import Simplex.Messaging.Transport.Client
-import System.Timeout (timeout)
 import Test.Hspec hiding (fit, it)
 import Test.Hspec.QuickCheck (modifyMaxSuccess)
 import Test.QuickCheck hiding (Large)
@@ -120,7 +113,6 @@ cryptoTests = do
   describe "sntrup761" $ do
     it "should enc/dec key" testSNTRUP761
     it "should reject malformed KEM encodings" testSNTRUP761RejectsMalformedEncodings
-    it "should fail key generation with degenerate RNG" testSNTRUP761KeypairDegenerateRNG
   describe "BBS+" $ do
     it "should sign and verify" testBBSSignVerify
     it "should derive public key from secret key" testBBSPublicKeyDerivation
@@ -306,26 +298,6 @@ testSNTRUP761 = do
   KEMSharedKey k' <- sntrup761Dec c sk
   k' `shouldBe` k
 
-foreign import ccall "wrapper"
-  mkRNGFunc :: RNGFunc -> IO (FunPtr RNGFunc)
-
-testSNTRUP761KeypairDegenerateRNG :: IO ()
-testSNTRUP761KeypairDegenerateRNG = do
-  -- constant byte 0 draws invertible g = -(1 + x + ... + x^760), byte 0x20 draws g = 0
-  keypairWithConstantRNG 0 `shouldReturn` Just 0
-  keypairWithConstantRNG 0x20 `shouldReturn` Just (-1)
-  where
-    keypairWithConstantRNG :: Word8 -> IO (Maybe CInt)
-    keypairWithConstantRNG b = do
-      result <- newEmptyMVar
-      -- timeout cannot interrupt a foreign call, so the call runs in another thread
-      _ <- forkIO $
-        bracket (mkRNGFunc $ \_ sz buf -> fillBytes buf b (fromIntegral sz)) freeHaskellFunPtr $ \rng ->
-          allocaBytes c_SNTRUP761_PUBLICKEY_SIZE $ \pkPtr ->
-            allocaBytes c_SNTRUP761_SECRETKEY_SIZE $ \skPtr ->
-              c_sntrup761_keypair pkPtr skPtr nullPtr rng >>= putMVar result
-      timeout 10000000 $ takeMVar result
-
 testSNTRUP761RejectsMalformedEncodings :: IO ()
 testSNTRUP761RejectsMalformedEncodings = do
   smpDecode @KEMPublicKey (smpEncode $ Large shortPublicKey) `shouldSatisfy` isLeft

tests/CoreTests/MsgStoreTests.hs

@@ -34,7 +34,7 @@ import Data.Time.Clock.System (SystemTime (..), getSystemTime)
 import SMPClient (testStoreLogFile, testStoreMsgsDir, testStoreMsgsDir2, testStoreMsgsFile, testStoreMsgsFile2)
 import Simplex.Messaging.Crypto (pattern MaxLenBS)
 import qualified Simplex.Messaging.Crypto as C
-import Simplex.Messaging.Protocol (EncDataBytes (..), EntityId (..), ErrorType (..), LinkId, Message (..), QueueLinkData, RecipientId, SParty (..), noMsgFlags)
+import Simplex.Messaging.Protocol (EntityId (..), ErrorType, LinkId, Message (..), QueueLinkData, RecipientId, SParty (..), noMsgFlags)
 import Simplex.Messaging.Server (exportMessages, importMessages, printMessageStats)
 import Simplex.Messaging.Server.Env.STM (MsgStore (..), journalMsgStoreDepth, readWriteQueueStore)
 import Simplex.Messaging.Server.Expiration (ExpirationConfig (..), expireBeforeEpoch)
@@ -43,7 +43,6 @@ import Simplex.Messaging.Server.MsgStore.STM
 import Simplex.Messaging.Server.MsgStore.Types
 import Simplex.Messaging.Server.QueueStore
 import Simplex.Messaging.Server.QueueStore.QueueInfo
-import Simplex.Messaging.Server.QueueStore.Types
 import Simplex.Messaging.Server.StoreLog (closeStoreLog, logCreateQueue)
 import System.Directory (copyFile, createDirectoryIfMissing, listDirectory, removeFile, renameFile)
 import System.FilePath ((</>))
@@ -58,6 +57,7 @@ import Simplex.Messaging.Agent.Store.Postgres.Common
 import Simplex.Messaging.Agent.Store.Shared (MigrationConfirmation (..))
 import Simplex.Messaging.Server.MsgStore.Postgres
 import Simplex.Messaging.Server.QueueStore.Postgres
+import Simplex.Messaging.Server.QueueStore.Types
 import SMPClient (postgressBracket, testServerDBConnectInfo, testStoreDBOpts)
 #endif
 
@@ -79,7 +79,6 @@ msgStoreTests = do
         someMsgStoreTests
         it "should correctly update message counts and canWrite flag" testUpdateMessageCounts
         it "tryDelPeekMsg (ACK not from NSE) should reset message counts when queue is empty" testResetMessageCounts
-        it "should expire messages across commit batches" testExpireMessagesInBatches
 #endif
   describe "Journal message store: queue state backup expiration" $ do
     it "should remove old queue state backups" testRemoveQueueStateBackups
@@ -101,7 +100,6 @@ msgStoreTests = do
       it "should get queue and store/read messages" testGetQueue
       it "should write/ack messages" testWriteAckMessages
       it "should not fail on EOF when changing read journal" testChangeReadJournal
-      it "should not add link data to secured messaging queue" testLinkDataSecuredQueue
 
 -- TODO constrain to STM stores?
 withMsgStore :: MsgStoreClass s => MsgStoreConfig s -> (s -> IO ()) -> IO ()
@@ -268,33 +266,6 @@ testChangeReadJournal ms = do
     (Msg "message 5", Nothing) <- tryDelPeekMsg ms q mId5
     void $ ExceptT $ deleteQueue ms q
 
-testLinkDataSecuredQueue :: MsgStoreClass s => s -> IO ()
-testLinkDataSecuredQueue ms = do
-  g <- C.newRandom
-  (sKey, _) <- atomically $ C.generateAuthKeyPair C.SEd25519 g
-  let st = queueStore ms
-      ld = (EncDataBytes "fixed data", EncDataBytes "user data")
-      rndId = atomically $ EntityId <$> C.randomBytes 24 g
-  (rId, qr) <- testNewQueueRec g QMMessaging
-  (cId, cqr) <- testNewQueueRec g QMContact
-  lnkId <- rndId
-  cLnkId <- rndId
-  runRight_ $ do
-    q <- ExceptT $ addQueue ms rId qr
-    -- the handle is read before SKEY, as in a command that raced with it
-    staleQ <- ExceptT $ getQueue ms SRecipient rId
-    ExceptT $ secureQueue st q sKey
-    liftIO $ addQueueLinkData st staleQ lnkId ld `shouldReturn` Left AUTH
-    freshQ <- ExceptT $ getQueue ms SRecipient rId
-    liftIO $ getQueueLinkData st freshQ lnkId `shouldReturn` Left AUTH
-    cq <- ExceptT $ addQueue ms cId cqr
-    ExceptT $ secureQueue st cq sKey
-    ExceptT $ addQueueLinkData st cq cLnkId ld
-    ld' <- ExceptT $ getQueueLinkData st cq cLnkId
-    liftIO $ ld' `shouldBe` ld
-    void $ ExceptT $ deleteQueue ms q
-    void $ ExceptT $ deleteQueue ms cq
-
 testExportImportStore :: JournalMsgStore 'QSMemory -> IO ()
 testExportImportStore ms = do
   g <- C.newRandom
@@ -356,34 +327,35 @@ testUpdateMessageCounts ms = do
     q <- ExceptT $ addQueue ms rId qr
     let write s = writeMsg ms q True =<< mkMessage s
         hasSize = checkQueueSize ms
-    q `hasSize` (0, True)
+    q `hasSize` (0, True, False)
     Just (Message {msgId = mId1}, True) <- write "message 1"
-    q `hasSize` (1, True)
+    q `hasSize` (1, True, True)
     Just (Message {msgId = mId2}, False) <- write "message 2"
-    q `hasSize` (2, True)
+    q `hasSize` (2, True, True)
     Just (Message {msgId = mId3}, False) <- write "message 3"
-    q `hasSize` (3, True)
+    q `hasSize` (3, True, True)
     Nothing <- write "message 4"
-    q `hasSize` (4, False)
+    q `hasSize` (4, False, True)
     Msg "message 1" <- tryPeekMsg ms q
-    q `hasSize` (4, False)
+    q `hasSize` (4, False, True)
     Msg "message 1" <- tryDelMsg ms q mId1
-    q `hasSize` (3, False)
+    q `hasSize` (3, False, True)
     Msg "message 2" <- tryPeekMsg ms q
     (Msg "message 2", Msg "message 3") <- tryDelPeekMsg ms q mId2
-    q `hasSize` (2, False)
+    q `hasSize` (2, False, True)
     (Msg "message 3", Just MessageQuota {msgId = mId4}) <- tryDelPeekMsg ms q mId3
-    q `hasSize` (1, False)
+    q `hasSize` (1, False, True)
     (Just MessageQuota {}, Nothing) <- tryDelPeekMsg ms q mId4
-    q `hasSize` (0, True)
+    q `hasSize` (0, True, False)
 
-checkQueueSize :: PostgresMsgStore -> PostgresQueue -> (Int64, Bool) -> ExceptT ErrorType IO ()
-checkQueueSize ms q (size, canWrt) = liftIO $ do
-  [(size', canWrt')] <-
+checkQueueSize :: PostgresMsgStore -> PostgresQueue -> (Int64, Bool, Bool) -> ExceptT ErrorType IO ()
+checkQueueSize ms q (size, canWrt, expire) = liftIO $ do
+  [(size', canWrt', expire')] <-
     withTransaction (dbStore $ queueStore ms) $ \db ->
-      DB.query db "SELECT msg_queue_size, msg_can_write FROM msg_queues WHERE recipient_id = ?" (Only (recipientId q))
+      DB.query db "SELECT msg_queue_size, msg_can_write, msg_queue_expire FROM msg_queues WHERE recipient_id = ?" (Only (recipientId q))
   size' `shouldBe` size
   canWrt' `shouldBe` canWrt
+  expire' `shouldBe` expire
 
 testResetMessageCounts :: PostgresMsgStore -> IO ()
 testResetMessageCounts ms = do
@@ -397,63 +369,25 @@ testResetMessageCounts ms = do
     Just (Message {msgId = mId2}, False) <- write "message 2"
     Just (Message {msgId = mId3}, False) <- write "message 3"
     Nothing <- write "message 4"
-    q `hasSize` (4, False)
+    q `hasSize` (4, False, True)
     liftIO $ setIncorrectSize q (10, True)
     Nothing <- write "message 5"
-    q `hasSize` (11, False)
+    q `hasSize` (11, False, True)
     (Msg "message 1", Msg "message 2") <- tryDelPeekMsg ms q mId1
-    q `hasSize` (10, False)
+    q `hasSize` (10, False, True)
     (Msg "message 2", Msg "message 3") <- tryDelPeekMsg ms q mId2
-    q `hasSize` (9, False)
+    q `hasSize` (9, False, True)
     (Msg "message 3", Just MessageQuota {msgId = mId4}) <- tryDelPeekMsg ms q mId3
-    q `hasSize` (8, False)
+    q `hasSize` (8, False, True)
     (Just MessageQuota {}, Just MessageQuota {msgId = mId5}) <- tryDelPeekMsg ms q mId4
-    q `hasSize` (7, False)
+    q `hasSize` (7, False, True)
     (Just MessageQuota {}, Nothing) <- tryDelPeekMsg ms q mId5
-    q `hasSize` (0, True) -- reset
+    q `hasSize` (0, True, False) -- reset
   where
     setIncorrectSize :: PostgresQueue -> (Int64, Bool) -> IO ()
     setIncorrectSize q (size, canWrt) =
       void $ withTransaction (dbStore $ queueStore ms) $ \db ->
         DB.execute db "UPDATE msg_queues SET msg_queue_size = ?, msg_can_write = ? WHERE recipient_id = ?" (size, canWrt, recipientId q)
-
-testExpireMessagesInBatches :: PostgresMsgStore -> IO ()
-testExpireMessagesInBatches ms = do
-  g <- C.newRandom
-  emptiedQs <- replicateM emptiedCount $ newQueue g
-  partialQs <- replicateM partialCount $ newQueue g
-  overQuotaQs <- replicateM overQuotaCount $ newQueue g
-  quotaMsgs <- runRight $ do
-    forM_ (emptiedQs <> partialQs) $ \q -> void $ write q "old 1"
-    forM_ emptiedQs $ \q -> void $ write q "old 2"
-    mapM fillPastQuota overQuotaQs
-  -- msg_ts has second granularity, so the recent messages need a new second to be kept
-  threadDelay 1100000
-  boundary <- systemSeconds <$> getSystemTime
-  runRight_ $ forM_ partialQs $ \q -> void $ write q "recent"
-
-  MessageStats {expiredMsgsCount, storedMsgsCount, storedQueues} <- expireOldMessages False ms boundary 0
-  expiredMsgsCount `shouldBe` (emptiedCount * 2 + partialCount + sum quotaMsgs)
-  storedMsgsCount `shouldBe` (partialCount + overQuotaCount) -- recent messages and quota markers
-  storedQueues `shouldBe` (emptiedCount + partialCount + overQuotaCount)
-  runRight_ $ do
-    forM_ emptiedQs $ \q -> checkQueueSize ms q (0, True)
-    forM_ partialQs $ \q -> checkQueueSize ms q (1, True)
-    -- the quota marker is never expired, and the queue stays blocked until it is acked
-    forM_ overQuotaQs $ \q -> checkQueueSize ms q (1, False)
-  where
-    -- expire_old_messages pages through expired messages and commits per page, so these
-    -- counts put a page boundary inside each group of queues.
-    emptiedCount = 120 :: Int
-    partialCount = 40 :: Int
-    overQuotaCount = 10 :: Int
-    newQueue g = do
-      (rId, qr) <- testNewQueueRec g QMMessaging
-      runRight $ ExceptT $ addQueue ms rId qr
-    write q s = writeMsg ms q True =<< mkMessage s
-    fillPastQuota q = go 0
-      where
-        go n = write q "fill" >>= maybe (pure n) (const $ go (n + 1))
 #endif
 
 testQueueState :: JournalMsgStore s -> IO ()

tests/CoreTests/SOCKSSettings.hs

@@ -2,18 +2,15 @@
 {-# LANGUAGE NamedFieldPuns #-}
 {-# LANGUAGE OverloadedLists #-}
 {-# LANGUAGE OverloadedStrings #-}
-{-# LANGUAGE PatternSynonyms #-}
 {-# LANGUAGE TypeApplications #-}
 {-# OPTIONS_GHC -fno-warn-ambiguous-fields #-}
 
 module CoreTests.SOCKSSettings where
 
 import Network.Socket (SockAddr (..), tupleToHostAddress)
-import Simplex.Messaging.Agent.Client (ipAddressProtected)
 import Simplex.Messaging.Client
-import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Encoding.String
-import Simplex.Messaging.Protocol (ErrorType, pattern SMPServer)
+import Simplex.Messaging.Protocol (ErrorType)
 import Simplex.Messaging.Transport.Client
 import Test.Hspec hiding (fit, it)
 import Util
@@ -22,7 +19,6 @@ socksSettingsTests :: Spec
 socksSettingsTests = do
   describe "hostMode and requiredHostMode settings" testHostMode
   describe "socksMode setting, independent of hostMode setting" testSocksMode
-  describe "ipAddressProtected, consistent with chosen host and socksMode" testIPAddressProtected
   describe "socks proxy address encoding" testSocksProxyEncoding
 
 testPublicHost :: TransportHost
@@ -98,19 +94,6 @@ testSocksMode = do
       let TransportClientConfig {socksProxy} = transportClientConfig cfg NRMInteractive host False Nothing
        in socksProxy
 
-testIPAddressProtected :: Spec
-testIPAddressProtected = do
-  it "should be protected if SOCKS proxy is used for the chosen host" $ do
-    protected SMAlways HMOnionViaSocks [testPublicHost] `shouldBe` True
-    protected SMOnion HMOnionViaSocks [testPublicHost, testOnionHost] `shouldBe` True
-    protected SMOnion HMPublic [testOnionHost] `shouldBe` True
-  it "should not be protected if SOCKS proxy is not used for the chosen host" $ do
-    protected SMOnion HMOnionViaSocks [testPublicHost] `shouldBe` False
-    protected SMOnion HMPublic [testPublicHost, testOnionHost] `shouldBe` False
-  where
-    protected socksMode hostMode hosts =
-      ipAddressProtected defaultNetworkConfig {socksProxy = Just defaultSocksProxyWithAuth, socksMode, hostMode} (SMPServer hosts "" (C.KeyHash ""))
-
 testSocksProxyEncoding :: Spec
 testSocksProxyEncoding = do
   it "should decode SOCKS proxy with isolate-by-auth mode" $ do

tests/CoreTests/StoreLogTests.hs

@@ -22,7 +22,7 @@ import qualified Data.X509.Validation as XV
 import SMPClient
 import Simplex.FileTransfer.Protocol (FileInfo (..))
 import Simplex.FileTransfer.Server.Store (FileRec (..), FileRecipient (..), FileStoreClass (..), RoundedFileTime, STMFileStore (..))
-import Simplex.FileTransfer.Server.StoreLog (FileStoreLogRecord (..), readWriteFileStore, serverFileName)
+import Simplex.FileTransfer.Server.StoreLog (FileStoreLogRecord (..), readWriteFileStore)
 import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Encoding.String
 import Simplex.Messaging.Protocol
@@ -37,7 +37,6 @@ import Simplex.Messaging.Server.StoreLog
 import Simplex.Messaging.SystemTime
 import Simplex.Messaging.Transport (SMPServiceRole (..))
 import Simplex.Messaging.Transport.Credentials (genCredentials)
-import System.FilePath ((</>))
 import Test.Hspec hiding (fit, it)
 import Util
 
@@ -270,18 +269,6 @@ fileStoreLogTests = do
           saved = [AddFile sId file createdAt Nothing EntityActive, BlockFile sId blockedWithNotice],
           compacted = [AddFile sId file createdAt Nothing (EntityBlocked blockedWithNotice)],
           state = M.fromList [(sId, (file, createdAt, Nothing, EntityBlocked blockedWithNotice))]
-        },
-      SLTC
-        { name = "put file with wrong file name",
-          saved = [AddFile sId file createdAt (Just expiresAt) EntityActive, PutFile sId "/etc/passwd"],
-          compacted = [AddFile sId file createdAt (Just expiresAt) EntityActive],
-          state = M.fromList [(sId, (file, createdAt, Just expiresAt, EntityActive))]
-        },
-      SLTC
-        { name = "put file in another directory",
-          saved = [AddFile sId file createdAt (Just expiresAt) EntityActive, PutFile sId ("/srv/xftp" </> serverFileName sId)],
-          compacted = [AddFile sId file createdAt (Just expiresAt) EntityActive, PutFile sId ("/srv/xftp" </> serverFileName sId)],
-          state = M.fromList [(sId, (file, createdAt, Just expiresAt, EntityActive))]
         }
     ]
 

tests/CoreTests/XFTPStoreTests.hs

@@ -9,7 +9,7 @@ import Data.Word (Word32)
 import Simplex.FileTransfer.Protocol (FileInfo (..), SFileParty (..))
 import Simplex.FileTransfer.Server.Store
 import Simplex.FileTransfer.Server.Store.Postgres (PostgresFileStore, importFileStore, exportFileStore)
-import Simplex.FileTransfer.Server.StoreLog (closeStoreLog, readWriteFileStore, serverFileName, writeFileStore)
+import Simplex.FileTransfer.Server.StoreLog (closeStoreLog, readWriteFileStore, writeFileStore)
 import Simplex.FileTransfer.Transport (XFTPErrorType (..))
 import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Protocol (BlockingInfo (..), BlockingReason (..), EntityId (..))
@@ -17,7 +17,6 @@ import Simplex.Messaging.Server.QueueStore (ServerEntityStatus (..))
 import Simplex.Messaging.Server.StoreLog (openWriteStoreLog)
 import Simplex.Messaging.SystemTime (RoundedSystemTime (..))
 import System.Directory (doesFileExist, removeFile)
-import System.FilePath ((</>))
 import Test.Hspec hiding (fit, it)
 import UnliftIO.STM
 import Util
@@ -266,7 +265,7 @@ testMigrationRoundTrip = do
       sId2 = EntityId "migration_file_2"
       rId1 = EntityId "migration_rcp_1_"
   addFile stmStore sId1 fileInfo1 testCreatedAt (Just testExpiresAt) EntityActive `shouldReturn` Right ()
-  void $ setFilePath stmStore sId1 ("/tmp" </> serverFileName sId1)
+  void $ setFilePath stmStore sId1 "/tmp/file1"
   addRecipient stmStore sId1 (FileRecipient rId1 rcpKey1) `shouldReturn` Right ()
   let testBlockInfo = BlockingInfo {reason = BRSpam, notice = Nothing}
   addFile stmStore sId2 fileInfo2 testCreatedAt Nothing (EntityBlocked testBlockInfo) `shouldReturn` Right ()
@@ -290,7 +289,7 @@ testMigrationRoundTrip = do
   case result1 of
     Right (FileRec {fileInfo = fi, filePath, expiresAt, fileStatus}, _) -> do
       size fi `shouldBe` 128000
-      readTVarIO filePath `shouldReturn` Just ("/tmp" </> serverFileName sId1)
+      readTVarIO filePath `shouldReturn` Just "/tmp/file1"
       expiresAt `shouldBe` Just testExpiresAt
       readTVarIO fileStatus `shouldReturn` EntityActive
     Left e -> expectationFailure $ "getFile sId1 failed: " <> show e

tests/NtfClient.hs

@@ -48,6 +48,7 @@ import Simplex.Messaging.Notifications.Server.Push.APNS
 import Simplex.Messaging.Notifications.Server.Push.APNS.Internal
 import Simplex.Messaging.Notifications.Transport
 import Simplex.Messaging.Protocol
+import Simplex.Messaging.Server.AddressStats (AddressStatsConfig (..))
 import Simplex.Messaging.Server.QueueStore.Postgres.Config (PostgresStoreCfg (..))
 import qualified Simplex.Messaging.TMap as TM
 import Simplex.Messaging.Transport
@@ -155,6 +156,7 @@ ntfServerCfg =
       serverStatsBackupFile = Nothing,
       prometheusInterval = Nothing,
       prometheusMetricsFile = ntfTestPrometheusMetricsFile,
+      addressStats = Just AddressStatsConfig {period = 1},
       ntfServerVRange = supportedServerNTFVRange,
       transportConfig = mkTransportServerConfig True (Just alpnSupportedNTFHandshakes) False,
       startOptions = defaultStartOptions

tests/RemoteControl.hs

@@ -9,15 +9,13 @@ module RemoteControl where
 
 import AgentTests.FunctionalAPITests (runRight)
 import Control.Logger.Simple
-import Control.Monad (void)
-import Control.Monad.Trans.Except (runExceptT)
 import Crypto.Random (ChaChaDRG)
 import qualified Data.Aeson as J
 import qualified Data.ByteString.Char8 as B
 import qualified Data.ByteString.Lazy.Char8 as LB
 import Data.List (stripPrefix)
 import Data.List.NonEmpty (NonEmpty (..))
-import Data.Time.Clock.System (SystemTime (..), getSystemTime)
+import Data.Time.Clock.System (SystemTime (..))
 import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Encoding.String (StrEncoding (..))
 import Simplex.Messaging.Transport (TSbChainKeys (..))
@@ -26,10 +24,8 @@ import qualified Simplex.RemoteControl.Client as HC (RCHostClient (action))
 import qualified Simplex.RemoteControl.Client as RC
 import Simplex.RemoteControl.Discovery (mkLastLocalHost, preferAddress)
 import Simplex.RemoteControl.Invitation
-  ( RCEncInvitation (..),
-    RCInvitation (..),
+  ( RCInvitation (..),
     RCSignedInvitation,
-    signInvitation,
     verifySignedInvitation,
   )
 import Simplex.RemoteControl.Types
@@ -49,7 +45,6 @@ remoteControlTests = do
     it "should connect to existing pairing" testExistingPairing
   describe "Multicast discovery" $ do
     it "should find paired host and connect" testMulticast
-    it "should accept announcement only within timestamp window" testAnnouncementTimestamp
 
 testPreferAddress :: Spec
 testPreferAddress = do
@@ -249,26 +244,6 @@ testMulticast = do
         Nothing -> fail "timeout"
         Just _ -> pure ()
 
-testAnnouncementTimestamp :: IO ()
-testAnnouncementTimestamp = do
-  drg <- C.newRandom
-  RCHostPairing {caKey, caCert, idPrivKey} <- RC.newRCHostPairing drg
-  (hostDhPubKey, dhPrivKey) <- atomically $ C.generateKeyPair @'C.X25519 drg
-  (skey, sessPrivKey) <- atomically $ C.generateKeyPair @'C.Ed25519 drg
-  (dh, ctrlDhPrivKey) <- atomically $ C.generateKeyPair @'C.X25519 drg
-  nonce <- atomically $ C.randomCbNonce drg
-  now <- systemSeconds <$> getSystemTime
-  let pairing = RCCtrlPairing {caKey, caCert, ctrlFingerprint = C.KeyHash "test-ca", idPubKey = C.publicKey idPrivKey, dhPrivKey, prevDhPrivKey = Nothing}
-      announce offset = do
-        let inv = RCInvitation {ca = C.KeyHash "test-ca", host = "127.0.0.1", port = 5223, v = supportedRCPVRange, app = J.String "app", ts = MkSystemTime (now + offset) 0, skey, idkey = C.publicKey idPrivKey, dh}
-        encInvitation <- either (fail . show) pure $ C.cbEncrypt (C.dh' hostDhPubKey ctrlDhPrivKey) nonce (strEncode $ signInvitation sessPrivKey idPrivKey inv) 900
-        runExceptT . void $ RC.findRCCtrlPairing (pairing :| []) RCEncInvitation {dhPubKey = dh, nonce, encInvitation}
-  announce 0 `shouldReturn` Right ()
-  announce (-3600) `shouldReturn` Right ()
-  announce 3500 `shouldReturn` Right ()
-  announce (-3700) `shouldReturn` Left RCEInvitation
-  announce 3700 `shouldReturn` Left RCEInvitation
-
 runCtrl :: TVar ChaChaDRG -> Bool -> RCHostPairing -> MVar RCSignedInvitation -> IO (Async RCHostPairing)
 runCtrl drg multicast hp invVar = async . runRight $ do
   (_found, inv, hc, r) <- RC.connectRCHost drg hp (J.String "app") multicast Nothing Nothing

tests/SMPClient.hs

@@ -18,6 +18,7 @@ module SMPClient where
 import Control.Monad
 import Control.Monad.Except (runExceptT)
 import Data.ByteString.Char8 (ByteString)
+import qualified Data.ByteString.Char8 as B
 import Data.List.NonEmpty (NonEmpty)
 import qualified Data.X509 as X
 import qualified Data.X509.Validation as XV
@@ -31,16 +32,19 @@ import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Encoding
 import Simplex.Messaging.Protocol
 import Simplex.Messaging.Server (runSMPServerBlocking)
+import Simplex.Messaging.Server.AddressStats (AddressStatsConfig (..))
 import Simplex.Messaging.Server.Env.STM
 import Simplex.Messaging.Server.MsgStore.Types (MsgStoreClass (..), SMSType (..), SQSType (..))
 import Simplex.Messaging.Server.QueueStore.Postgres.Config (PostgresStoreCfg (..))
 import Simplex.Messaging.Transport
+import Simplex.Messaging.Transport.Buffer (trimCR)
 import Simplex.Messaging.Transport.Client
 import Simplex.Messaging.Transport.Server
 import Simplex.Messaging.Transport.Shared (ChainCertificates (..), chainIdCaCerts)
 import Simplex.Messaging.Util (ifM)
 import Simplex.Messaging.Version
 import Simplex.Messaging.Version.Internal
+import System.IO (Handle, IOMode (..), hClose, hFlush)
 import System.Info (os)
 import Test.Hspec hiding (fit, it)
 import UnliftIO.Concurrent
@@ -84,6 +88,12 @@ ntfTestPort = "6001"
 ntfTestPort2 :: ServiceName
 ntfTestPort2 = "6002"
 
+testControlPort :: ServiceName
+testControlPort = "5226"
+
+testControlPortUserAuth :: BasicAuth
+testControlPortUserAuth = "user_password"
+
 testKeyHash :: C.KeyHash
 testKeyHash = "LcJUMfVhwD8yxjAiSaDzzGF3-kLG4Uh0Fl_ZIjrRwjI="
 
@@ -261,6 +271,7 @@ cfgMS msType = withStoreCfg (testServerStoreConfig msType) $ \serverStoreCfg ->
       serverStatsBackupFile = Nothing,
       prometheusInterval = Nothing,
       prometheusMetricsFile = testPrometheusMetricsFile,
+      addressStats = Just AddressStatsConfig {period = 1},
       pendingENDInterval = 500000,
       ntfDeliveryInterval = 200000,
       smpCredentials =
@@ -316,9 +327,6 @@ prevRange vr = vr {maxVersion = max (minVersion vr) (prevVersion $ maxVersion vr
 prevVersion :: Version v -> Version v
 prevVersion (Version v) = Version (v - 1)
 
-nextVersion :: Version v -> Version v
-nextVersion (Version v) = Version (v + 1)
-
 proxyCfg :: AServerConfig
 proxyCfg = proxyCfgMS (ASType SQSMemory SMSJournal)
 
@@ -349,16 +357,6 @@ proxyCfgShortTimeout =
         nt = NetworkTimeout {backgroundTimeout = 4_000000, interactiveTimeout = 4_000000}
      in cfg' {smpAgentCfg = aCfg {smpCfg = cCfg {networkConfig = (networkConfig cCfg) {tcpConnectTimeout = nt}}}}
 
-proxyCfgVPrev :: AStoreType -> AServerConfig
-proxyCfgVPrev msType =
-  updateCfg (proxyCfgMS msType) $ \cfg' ->
-    let aCfg = smpAgentCfg cfg'
-        cCfg = smpCfg aCfg
-     in cfg'
-          { smpServerVRange = prevRange $ smpServerVRange cfg',
-            smpAgentCfg = aCfg {smpCfg = cCfg {serverVRange = prevRange $ serverVRange cCfg}}
-          }
-
 withSmpServerStoreMsgLogOn :: HasCallStack => (ASrvTransport, AStoreType) -> ServiceName -> (HasCallStack => ThreadId -> IO a) -> IO a
 withSmpServerStoreMsgLogOn (t, msType) =
   withSmpServerConfigOn t $ updateCfg (cfgMS msType) $ \cfg' -> cfg' {storeNtfsFile = Just testStoreNtfsFile, serverStatsBackupFile = Just testServerStatsBackupFile}
@@ -409,6 +407,22 @@ withStallingServerOn port action =
     (pure ())
     (const action)
 
+withControlPort :: (Handle -> IO a) -> IO a
+withControlPort action = do
+  addr : _ <- getAddrInfo (Just defaultHints {addrSocketType = Stream}) (Just "127.0.0.1") (Just testControlPort)
+  E.bracket (connectHandle addr) hClose $ \h -> replicateM_ 2 (B.hGetLine h) >> action h
+  where
+    connectHandle addr = do
+      sock <- socket (addrFamily addr) (addrSocketType addr) (addrProtocol addr)
+      connect sock $ addrAddress addr
+      socketToHandle sock ReadWriteMode
+
+controlPortCommand :: Handle -> ByteString -> Int -> IO [ByteString]
+controlPortCommand h cmd n = do
+  B.hPutStrLn h cmd
+  hFlush h
+  replicateM n $ trimCR <$> B.hGetLine h
+
 withSmpServerOn :: HasCallStack => (ASrvTransport, AStoreType) -> ServiceName -> IO a -> IO a
 withSmpServerOn ps port' = withSmpServerThreadOn ps port' . const
 

tests/SMPProxyTests.hs

@@ -33,11 +33,13 @@ import Simplex.Messaging.Agent.Env.SQLite (AgentConfig (..), InitialAgentServers
 import Simplex.Messaging.Agent.Protocol hiding (CON, CONF, INFO, REQ)
 import qualified Simplex.Messaging.Agent.Protocol as A
 import Simplex.Messaging.Client
+import Simplex.Messaging.Client.Agent (SMPClientAgentConfig (..))
 import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Crypto.Ratchet (pattern PQSupportOn)
 import qualified Simplex.Messaging.Crypto.Ratchet as CR
 import Simplex.Messaging.Protocol (EncRcvMsgBody (..), MsgBody, QueueReqData (..), RcvMessage (..), SubscriptionMode (..), maxMessageLength, noMsgFlags)
 import qualified Simplex.Messaging.Protocol as SMP
+import Simplex.Messaging.Server.AddressStats (AddressStatsConfig (..), defaultAddressStatsPeriod)
 import Simplex.Messaging.Server.Env.STM (AStoreType (..), ServerConfig (..))
 import Simplex.Messaging.Server.MsgStore.Types (SQSType (..))
 import Simplex.Messaging.Transport
@@ -73,8 +75,6 @@ smpProxyTests = do
       xit "no SMP service at host/port" todo
       xit "bad SMP fingerprint" todo
     xit "batching proxy requests" todo
-    it "relay rejects forwarded command with changed version" $ \_ ->
-      testChangedFwdVersion
   describe "deliver message via SMP proxy" $ do
     let srv1 = SMPServer testHost testPort testKeyHash
         srv2 = SMPServer testHost2 testPort2 testKeyHash
@@ -97,11 +97,6 @@ smpProxyTests = do
           deliverMessageViaProxy proxyServ relayServ C.SEd25519 msg1 msg2
         it "max message size, X25519 keys" . twoServersFirstProxy $
           deliverMessageViaProxy proxyServ relayServ C.SX25519 msg1 msg2
-      describe "version compatibility" $ do
-        let deliver clientVR = deliverMessagesViaProxyVR clientVR srv1 srv2 C.SEd448 ["hello 1"] ["hello 2"]
-        it "prev client" . twoServersFirstProxy $ deliver (prevRange supportedClientSMPRelayVRange)
-        it "prev proxy" . twoServersPrevProxy $ deliver supportedClientSMPRelayVRange
-        it "prev relay" . twoServersPrevRelay $ deliver supportedClientSMPRelayVRange
       describe "stress test 1k" $ do
         let deliver n = deliverMessagesViaProxy srv1 srv2 C.SEd448 [] (map bshow [1 :: Int .. n])
         it "1x1000" . twoServersFirstProxy $ deliver 1000
@@ -156,15 +151,34 @@ smpProxyTests = do
       xdescribe "stress test 10k" $ do
         let deliver nAgents nMsgs = agentDeliverMessagesViaProxyConc (replicate nAgents [srv1]) (map bshow [1 :: Int .. nMsgs])
         it "25 agents, 300 pairs, 17 messages" . oneServer . withNumCapabilities 4 $ deliver 25 17
+  describe "client address statistics" $ do
+    it "should count proxy commands to other servers" $
+      proxyAddressStats [] [("PRXY", "2"), ("PRXY_new", "1"), ("PRXY_connected", "1"), ("PFWD", "3"), ("PFWD_other", "2"), ("PFWD_failed", "1")]
+    it "should count proxy commands to own servers" $
+      proxyAddressStats ["127.0.0.1"] [("PRXY", "2"), ("PRXY_own", "2"), ("PFWD", "3"), ("PFWD_own", "2"), ("PFWD_failed", "1")]
   where
+    proxyAddressStats :: [ByteString] -> [(ByteString, ByteString)] -> AStoreType -> IO ()
+    proxyAddressStats ownDomains counts msType =
+      twoServers_ proxyCfg' (cfgMS msType) testProxyCounts msType
+      where
+        proxyCfg' = updateCfg (proxyCfgMS msType) $ \cfg_ ->
+          cfg_
+            { addressStats = Just AddressStatsConfig {period = defaultAddressStatsPeriod},
+              controlPort = Just testControlPort,
+              controlPortUserAuth = Just testControlPortUserAuth,
+              smpAgentCfg = (smpAgentCfg cfg_) {ownServerDomains = ownDomains}
+            }
+        testProxyCounts = do
+          deliverMessageViaProxy (SMPServer testHost2 testPort testKeyHash) (SMPServer testHost2 testPort2 testKeyHash) C.SEd448 "hello 1" "hello 2"
+          withControlPort $ \h -> do
+            controlPortCommand h ("auth " <> SMP.unBasicAuth testControlPortUserAuth) 1 `shouldReturn` ["Current role is CPRUser"]
+            forM_ counts $ \(counter, n) ->
+              controlPortCommand h ("addresses " <> counter) 2 `shouldReturn` ["address,previous,current", "127.0.0.1,0," <> n]
     oneServer test msType = withSmpServerConfigOn (transport @TLS) (updateCfg (proxyCfgMS msType) $ \cfg_ -> cfg_ {msgQueueQuota = 128, maxJournalMsgCount = 256}) testPort $ const test
     twoServers test msType = twoServers_ (proxyCfgMS msType) (proxyCfgMS msType) test msType
     twoServersFirstProxy test msType = twoServers_ (proxyCfgMS msType) (updateCfg (cfgMS msType) $ \cfg_ -> cfg_ {msgQueueQuota = 128, maxJournalMsgCount = 256}) test msType
     twoServersMoreConc test msType = twoServers_ (updateCfg (proxyCfgMS msType) $ \cfg_ -> cfg_ {serverClientConcurrency = 128}) (updateCfg (cfgMS msType) $ \cfg_ -> cfg_ {msgQueueQuota = 128, maxJournalMsgCount = 256}) test msType
     twoServersNoConc test msType = twoServers_ (updateCfg (proxyCfgMS msType) $ \cfg_ -> cfg_ {serverClientConcurrency = 1}) (updateCfg (cfgMS msType) $ \cfg_ -> cfg_ {msgQueueQuota = 128, maxJournalMsgCount = 256}) test msType
-    twoServersPrevProxy test msType = twoServers_ (proxyCfgVPrev msType) (cfgMS msType) test msType
-    twoServersPrevRelay test msType = twoServers_ (proxyCfgMS msType) (prevServerVRange $ cfgMS msType) test msType
-    prevServerVRange cfg' = updateCfg cfg' $ \cfg_ -> cfg_ {smpServerVRange = prevRange $ smpServerVRange cfg_}
     twoServers_ :: AServerConfig -> AServerConfig -> IO () -> AStoreType -> IO ()
     twoServers_ cfg1 cfg2 runTest (ASType qsType _) =
       withSmpServerConfigOn (transport @TLS) cfg1 testPort $ \_ ->
@@ -177,14 +191,11 @@ deliverMessageViaProxy :: (C.AlgorithmI a, C.AuthAlgorithm a) => SMPServer -> SM
 deliverMessageViaProxy proxyServ relayServ alg msg msg' = deliverMessagesViaProxy proxyServ relayServ alg [msg] [msg']
 
 deliverMessagesViaProxy :: (C.AlgorithmI a, C.AuthAlgorithm a) => SMPServer -> SMPServer -> C.SAlgorithm a -> [ByteString] -> [ByteString] -> IO ()
-deliverMessagesViaProxy = deliverMessagesViaProxyVR $ mkVersionRange minServerSMPRelayVersion currentClientSMPRelayVersion
-
-deliverMessagesViaProxyVR :: (C.AlgorithmI a, C.AuthAlgorithm a) => VersionRangeSMP -> SMPServer -> SMPServer -> C.SAlgorithm a -> [ByteString] -> [ByteString] -> IO ()
-deliverMessagesViaProxyVR clientVR proxyServ relayServ alg unsecuredMsgs securedMsgs = do
+deliverMessagesViaProxy proxyServ relayServ alg unsecuredMsgs securedMsgs = do
   g <- C.newRandom
   -- set up proxy
   ts <- getCurrentTime
-  pc' <- getProtocolClient g NRMInteractive (1, proxyServ, Nothing) defaultSMPClientConfig {serverVRange = clientVR, proxiedRelayVRange = clientVR} [] Nothing ts (\_ -> pure ())
+  pc' <- getProtocolClient g NRMInteractive (1, proxyServ, Nothing) defaultSMPClientConfig {serverVRange = mkVersionRange minServerSMPRelayVersion currentClientSMPRelayVersion} [] Nothing ts (\_ -> pure ())
   pc <- either (fail . show) pure pc'
   THAuthClient {} <- maybe (fail "getProtocolClient returned no thAuth") pure $ thAuth $ thParams pc
   -- set up relay
@@ -204,8 +215,6 @@ deliverMessagesViaProxyVR clientVR proxyServ relayServ alg unsecuredMsgs secured
   forM_ unsecuredMsgs $ \msg -> do
     runExceptT' (proxySMPMessage pc NRMInteractive sess Nothing sndId noMsgFlags msg) `shouldReturn` Right ()
     runExceptT' (proxySMPMessage pc NRMInteractive sess {prSessionId = "bad session"} Nothing sndId noMsgFlags msg) `shouldReturn` Left (ProxyProtocolError $ SMP.PROXY SMP.NO_SESSION)
-    forM_ ([prevVersion minServerSMPRelayVersion, nextVersion currentServerSMPRelayVersion] :: [VersionSMP]) $ \v ->
-      runExceptT' (proxySMPMessage pc NRMInteractive sess {prVersion = v} Nothing sndId noMsgFlags msg) `shouldReturn` Left (ProxyProtocolError $ SMP.PROXY $ SMP.PROTOCOL $ SMP.PROXY $ SMP.BROKER $ SMP.TRANSPORT TEVersion)
     -- receive 1
     (_tSess, _, [(_entId, STEvent (Right (SMP.MSG RcvMessage {msgId, msgBody = EncRcvMsgBody encBody})))]) <- atomically $ readTBQueue msgQ
     dec msgId encBody `shouldBe` Right msg
@@ -461,21 +470,6 @@ requestRelaySession =
   testSMPClient_ "localhost" testPort supportedServerSMPRelayVRange Nothing $ \(th :: THandleSMP TLS 'TClient) ->
     (\(_, _, reply) -> reply) <$> sendRecv th (Nothing, "1", NoEntity, SMP.PRXY testSMPServer2 Nothing)
 
-testChangedFwdVersion :: IO ()
-testChangedFwdVersion =
-  withSmpServerConfigOn (transport @TLS) cfg testPort $ \_ -> do
-    g <- C.newRandom
-    ts <- getCurrentTime
-    rc <- either (fail . show) pure =<< getProtocolClient g NRMInteractive (1, testSMPServer, Nothing) defaultSMPClientConfig [] Nothing ts (\_ -> pure ())
-    THAuthClient {peerServerPubKey} <- maybe (fail "getProtocolClient returned no thAuth") pure $ thAuth $ thParams rc
-    (cmdPubKey, cmdPrivKey) <- atomically $ C.generateKeyPair g
-    nonce@(C.CbNonce corrId) <- atomically $ C.randomCbNonce g
-    let v = currentClientSMPRelayVersion
-    et <- either (fail . show) (pure . SMP.EncTransmission) $ C.cbEncrypt (C.dh' peerServerPubKey cmdPrivKey) (SMP.encTransmissionNonce v nonce) "" SMP.paddedProxiedTLength
-    let forward fwdVersion = forwardSMPTransmission rc (SMP.CorrId corrId) fwdVersion cmdPubKey et
-    _ <- runExceptT' $ forward v
-    runExceptT (forward $ prevVersion v) `shouldReturn` Left (PCEProtocolError SMP.CRYPTO)
-
 -- Shared "phase 2" of the reconnection tests: start a healthy relay, confirm it is reachable
 -- directly (PING, not via the proxy) so a proxy failure can only mean the proxy didn't reconnect,
 -- let any stored connection error expire, then require the proxy to establish the session (PKEY).

tests/ServerTests.hs

@@ -47,6 +47,7 @@ import Simplex.Messaging.Encoding.String
 import Simplex.Messaging.Parsers (parseAll, parseString)
 import Simplex.Messaging.Protocol
 import Simplex.Messaging.Server (exportMessages)
+import Simplex.Messaging.Server.AddressStats (AddressStatsConfig (..), defaultAddressStatsPeriod)
 import Simplex.Messaging.Server.Env.STM (AStoreType (..), MsgStore (..), ServerConfig (..), ServerStoreCfg (..), readWriteQueueStore)
 import Simplex.Messaging.Server.Expiration
 import Simplex.Messaging.Server.MsgStore.Journal (JournalStoreConfig (..), QStoreCfg (..), stmQueueStore)
@@ -96,6 +97,7 @@ serverTests = do
   describe "Restore messages" testRestoreMessages
   describe "Restore messages (old / v2)" testRestoreExpireMessages
   describe "Save prometheus metrics" testPrometheusMetrics
+  describe "Client address statistics" testAddressStatsControlPort
   describe "Timing of AUTH error" testTiming
   describe "Message notifications" $ do
     testMessageNotifications
@@ -1254,6 +1256,27 @@ testPrometheusMetrics =
     let cfg' = updateCfg (cfgMS msType) $ \cfg_ -> cfg_ {prometheusInterval = Just 1}
     withSmpServerConfigOn at cfg' testPort $ \_ -> threadDelay 1000000
     doesFileExist testPrometheusMetricsFile `shouldReturn` True
+    metrics <- B.readFile testPrometheusMetricsFile
+    metrics `shouldSatisfy` ("# TYPE simplex_smp_client_address_period_count histogram" `B.isInfixOf`)
+
+testAddressStatsControlPort :: SpecWith (ASrvTransport, AStoreType)
+testAddressStatsControlPort =
+  it "should list client addresses by counter via control port" $ \(at@(ATransport (_ :: TProxy c 'TServer)), msType) -> do
+    let cfg' = updateCfg (cfgMS msType) $ \cfg_ -> cfg_ {addressStats = Just AddressStatsConfig {period = defaultAddressStatsPeriod}, controlPort = Just testControlPort, controlPortUserAuth = Just testControlPortUserAuth}
+        ipv4Client = testSMPClient_ @c "127.0.0.1" testPort supportedClientSMPRelayVRange Nothing
+    withSmpServerConfigOn at cfg' testPort $ \_ ->
+      ipv4Client $ \r -> ipv4Client $ \s -> do
+        g <- C.newRandom
+        (sPub, sKey) <- atomically $ C.generateAuthKeyPair C.SEd448 g
+        (sId, _, _, _) <- createAndSecureQueue r sPub
+        Resp "bcda" _ OK <- signSendRecv s sKey ("bcda", sId, _SEND "hello")
+        Resp "cdab" _ OK <- signSendRecv s sKey ("cdab", sId, _SEND "hello again")
+        withControlPort $ \h -> do
+          controlPortCommand h "addresses SEND" 1 `shouldReturn` ["AUTH"]
+          controlPortCommand h ("auth " <> unBasicAuth testControlPortUserAuth) 1 `shouldReturn` ["Current role is CPRUser"]
+          controlPortCommand h "addresses unknown" 1 `shouldReturn` ["error: unknown counter"]
+          controlPortCommand h "addresses SEND" 2 `shouldReturn` ["address,previous,current", "127.0.0.1,0,2"]
+          controlPortCommand h "addresses connections" 2 `shouldReturn` ["address,previous,current", "127.0.0.1,0,2"]
 
 createAndSecureQueue :: Transport c => THandleSMP c 'TClient -> SndPublicAuthKey -> IO (SenderId, RecipientId, RcvPrivateAuthKey, RcvDhSecret)
 createAndSecureQueue h sPub = do

tests/Test.hs

@@ -7,6 +7,7 @@ import CLITests
 import Control.Concurrent (threadDelay)
 import qualified Control.Exception as E
 import Control.Logger.Simple
+import CoreTests.AddressStatsTests
 import CoreTests.BatchingTests
 import CoreTests.CryptoFileTests
 import CoreTests.CryptoTests
@@ -83,6 +84,7 @@ main = do
       . after_ (eventuallyRemove "tests/tmp" 3)
       $ do
         describe "Core tests" $ do
+          describe "Address statistics tests" addressStatsTests
           describe "Batching tests" batchingTests
           describe "Encoding tests" encodingTests
           describe "Version range" versionRangeTests
@@ -109,8 +111,7 @@ main = do
           describe "SMP server schema dump" $
             postgresSchemaDumpTest
               serverMigrations
-              [ "20250320_short_links", -- snd_secure moves to the bottom on down migration
-                "20260918_expire_messages" -- msg_queue_expire moves to the bottom on down migration
+              [ "20250320_short_links" -- snd_secure moves to the bottom on down migration
               ] -- skipComparisonForDownMigrations
               testStoreDBOpts
               "src/Simplex/Messaging/Server/QueueStore/Postgres/server_schema.sql"

tests/XFTPClient.hs

@@ -24,6 +24,7 @@ import qualified Simplex.Messaging.Agent as A
 import Simplex.Messaging.Agent.Protocol (UserId)
 import Simplex.Messaging.Crypto.File (CryptoFile)
 import Simplex.Messaging.Protocol (XFTPServer)
+import Simplex.Messaging.Server.AddressStats (AddressStatsConfig (..))
 import Simplex.Messaging.Transport.HTTP2 (httpALPN)
 import Simplex.Messaging.Transport.Server
 import Test.Hspec hiding (fit, it)
@@ -208,6 +209,7 @@ testXFTPServerConfig =
       serverStatsBackupFile = Nothing,
       prometheusInterval = Nothing,
       prometheusMetricsFile = xftpTestPrometheusMetricsFile,
+      addressStats = Just AddressStatsConfig {period = 1},
       transportConfig = mkTransportServerConfig True (Just alpnSupportedXFTPhandshakes) False,
       responseDelay = 0,
       webStaticPath = Nothing

tests/XFTPServerTests.hs

@@ -28,6 +28,7 @@ import qualified Data.X509 as X
 import Data.X509.Validation (Fingerprint (..), getFingerprint)
 import Network.HPACK.Token (tokenKey)
 import qualified Network.HTTP2.Client as H2
+import SMPClient (controlPortCommand, testControlPort, testControlPortUserAuth, withControlPort)
 import ServerTests (logSize)
 import Simplex.FileTransfer.Client hiding (createXFTPChunk)
 import qualified Simplex.FileTransfer.Client as A
@@ -39,7 +40,8 @@ import Simplex.Messaging.Client (ProtocolClientError (..))
 import qualified Simplex.Messaging.Crypto as C
 import qualified Simplex.Messaging.Crypto.Lazy as LC
 import Simplex.Messaging.Encoding (smpDecode, smpEncode)
-import Simplex.Messaging.Protocol (BasicAuth, EntityId (..), RecipientId, SenderId, pattern NoEntity)
+import Simplex.Messaging.Protocol (BasicAuth (..), EntityId (..), RecipientId, SenderId, pattern NoEntity)
+import Simplex.Messaging.Server.AddressStats (AddressStatsConfig (..), defaultAddressStatsPeriod)
 import Simplex.Messaging.Server.Expiration (ExpirationConfig (..))
 import Simplex.Messaging.Transport (CertChainPubKey (..), TLS (..), TransportPeer (..), defaultSupportedParams, defaultSupportedParamsHTTPS)
 import Simplex.Messaging.Transport.Client (TransportClientConfig (..), TransportHost (..), defaultTransportClientConfig, runTLSTransportClient)
@@ -68,6 +70,7 @@ xftpServerTests =
       it "should disconnect inactive clients" testInactiveClientExpiration
       it "should not allow uploading chunks after specified storage quota" testFileStorageQuota
       it "should store file records to log and restore them after server restart" testFileLog
+      it "should count commands, transfers and recipients by client address" testFileAddressStats
       describe "XFTP basic auth" $ do
         --                                               allow FNEW | server auth | clnt auth | success
         it "prohibited without basic auth" $ testFileBasicAuth True (Just "pwd") Nothing False
@@ -334,6 +337,23 @@ testFileLog _ = do
       downloadXFTPChunk g c rpKey rId $ XFTPRcvChunkSpec "tests/tmp/received_chunk1" chSize digest
       liftIO $ B.readFile "tests/tmp/received_chunk1" `shouldReturn` bytes
 
+testFileAddressStats :: AFStoreType -> Expectation
+testFileAddressStats fsType =
+  withXFTPServerConfigOn (updateXFTPCfg (cfgFS fsType) $ \c -> c {addressStats, controlPort = Just testControlPort, controlPortUserAuth = Just testControlPortUserAuth}) $ \_ -> do
+    ts <- getCurrentTime
+    runRight_ $ do
+      c <- ExceptT $ getXFTPClient (1, "xftp://[email protected]:8000", Nothing) testXFTPClientConfig [] ts (\_ -> pure Nothing) (\_ -> pure ())
+      runTestFileChunkDelivery c c
+    withControlPort $ \h -> do
+      controlPortCommand h ("auth " <> unBasicAuth testControlPortUserAuth) 1 `shouldReturn` ["Current role is CPRUser"]
+      controlPortCommand h "addresses errors" 1 `shouldReturn` ["address,previous,current"]
+      forM_ counts $ \(counter, n) ->
+        controlPortCommand h ("addresses " <> counter) 2 `shouldReturn` ["address,previous,current", "127.0.0.1,0," <> n]
+  where
+    addressStats = Just AddressStatsConfig {period = defaultAddressStatsPeriod}
+    counts :: [(ByteString, ByteString)]
+    counts = [("connections", "1"), ("FNEW", "2"), ("FPUT", "2"), ("FGET", "2"), ("recipients", "2"), ("upload_kb", "128"), ("download_kb", "256")]
+
 testFileBasicAuth :: Bool -> Maybe BasicAuth -> Maybe BasicAuth -> Bool -> AFStoreType -> IO ()
 testFileBasicAuth allowNewFiles newFileBasicAuth clntAuth success fsType =
   withXFTPServerConfigOn (updateXFTPCfg (cfgFS fsType) $ \c -> c {allowNewFiles, newFileBasicAuth}) $