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fix(gateway): save WhatsApp QR code as PNG file for reliable scanning

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Terminal QR codes can be distorted by font size/line height. Save QR as
PNG file that can be opened with an image viewer for reliable scanning.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Artur Do Lago
2026-01-10 09:36:18 +01:00
parent 5251c8cd0a
commit 02e1c8645b
1 changed files with 28 additions and 4 deletions
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packages/agent-core/src/gateway/whatsapp.ts
+28 -4
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@@ -117,11 +117,35 @@ export namespace WhatsAppGateway {
})
// QR Code event - user needs to scan
this.client.on("qr", (qr: string) => {
this.client.on("qr", async (qr: string) => {
log.info("WhatsApp QR code received - scan with phone")
console.log("\n=== SCAN THIS QR CODE WITH WHATSAPP ===\n")
qrcode.default.generate(qr, { small: true })
console.log("\n========================================\n")
// Save QR code as PNG file for proper scanning
const qrImagePath = path.join(sessionDir, "whatsapp-qr.png")
try {
// @ts-ignore - qrcode is an optional dependency
const QRCodeModule = await import("qrcode")
// Handle both ESM default export and CommonJS
const QRCode = QRCodeModule.default || QRCodeModule
await QRCode.toFile(qrImagePath, qr, {
type: "png",
width: 400,
margin: 2,
color: { dark: "#000000", light: "#ffffff" },
})
console.log("\n=== SCAN THIS QR CODE WITH WHATSAPP ===")
console.log(`\nQR Code saved to: ${qrImagePath}`)
console.log("\nOpen this file with an image viewer and scan it with WhatsApp.")
console.log("Or run: xdg-open " + qrImagePath)
console.log("\n========================================\n")
} catch (e) {
// Fallback to terminal output
console.error("PNG QR generation failed:", e)
console.log("\n=== SCAN THIS QR CODE WITH WHATSAPP ===\n")
console.log("(Terminal QR may be distorted - try zooming out or use a smaller font)\n")
qrcode.default.generate(qr, { small: true })
console.log("\n========================================\n")
}
})
// Ready event