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< /// @title LaunchFactory
---
> /// @title LaunchFactoryArc
> /// @dev The Arc (chain 5042) deployment of LaunchFactory: a verbatim copy of src/LaunchFactory.sol plus ONE guard.
> ///      On Arc the native asset is USDC, and the same balance is also the ERC-20 at 0x3600…0000. LaunchLocker keeps
> ///      one ledger per currency (`reserved`, `claimable`), so a native-quoted position there would let a credited
> ///      ERC-20 share (a payout on Circle's blocklist) be read as native surplus by another launch's `collect` and
> ///      swept. `launch` therefore refuses `quote = address(0)`, unconditionally: this contract is only ever deployed on
> ///      Arc. USDC pools use the ERC-20 face. Everything else,
> ///      and the locker it deploys, is byte-for-byte the Base / Robinhood Chain code. script/check-arc-factory.sh keeps
> ///      the two files in sync.
> ///
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< contract LaunchFactory {
---
> contract LaunchFactoryArc {
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>     error NativeQuoteUnsupported();
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>         if (p.quote == address(0)) revert NativeQuoteUnsupported(); // Arc: see the contract note