Broadcast transaction form

fixes #878

backend/src/index.ts

@@ -69,7 +69,8 @@ class Server {
         next();
       })
       .use(express.urlencoded({ extended: true }))
-      .use(express.json());
+      .use(express.text())
+    ;
 
     this.server = http.createServer(this.app);
     this.wss = new WebSocket.Server({ server: this.server });

backend/src/routes.ts

@@ -768,8 +768,13 @@ class Routes {
   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);
+      let rawTx;
+      if (typeof req.body === 'object') {
+        rawTx = Object.keys(req.body)[0];
+      } else {
+        rawTx = req.body;
+      }
+      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 })