Adding POST /tx API to bitcoind mode

fixes #777

backend/src/routes.ts

@@ -764,6 +764,18 @@ class Routes {
       res.status(500).send(e instanceof Error ? e.message : e);
     }
   }
+
+  public async $postTransaction(req: Request, res: Response) {
+    res.setHeader('content-type', 'text/plain');
+    try {
+      const rawtx = Object.keys(req.body)[0];
+      const txIdResult = await bitcoinApi.$sendRawTransaction(rawtx);
+      res.send(txIdResult);
+    } catch (e: any) {
+      res.status(400).send(e.message && e.code ? 'sendrawtransaction RPC error: ' + JSON.stringify({ code: e.code, message: e.message })
+        : (e.message || 'Error'));
+    }
+  }
 }
 
 export default new Routes();