sv2 debug

src/services/stratum-v1.service.ts

@@ -428,6 +428,13 @@ export class StratumV1Service implements OnModuleInit {
             return null;
         }
 
+        // Plaintext that is not JSON-RPC is not a valid SV2 Noise Act 1. This
+        // catches PROXY-protocol lines, SSH banners, and malformed SV1 clients
+        // before they get misrouted into the SV2 decrypt path.
+        if (this.looksLikePlaintext(firstChunk)) {
+            return null;
+        }
+
         return 'v2';
     }
 
@@ -473,6 +480,18 @@ export class StratumV1Service implements OnModuleInit {
             || prefix.startsWith('OPTIONS ');
     }
 
+    private looksLikePlaintext(firstChunk: Buffer): boolean {
+        for (const byte of firstChunk) {
+            const isWhitespace = byte === 0x09 || byte === 0x0a || byte === 0x0d;
+            const isPrintableAscii = byte >= 0x20 && byte <= 0x7e;
+            if (!isWhitespace && !isPrintableAscii) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
     private getPositiveIntegerEnv(key: string, fallback: number) {
         const configured = parseInt(process.env[key], 10);
         if (Number.isFinite(configured) && configured > 0) {