Merge pull request #1347 from navidR/dev/navidr/fix-electrumx-protocol

fix: send server.version handshake before any ElectrumX request

Author: julian-CStack

lib/electrumx_rpc/electrumx_client.dart

@@ -314,6 +314,8 @@ class ElectrumXClient {
         );
       }
 
+      await newClient.request('server.version');
+
       await ClientManager.sharedInstance.addClient(
         newClient,
         cryptoCurrency: cryptoCurrency,

lib/utilities/connection_check/electrum_connection_check.dart

@@ -57,9 +57,9 @@ Future<bool> checkElectrumServer({
           ),
         );
 
-    await client.ping().timeout(
-      Duration(seconds: (proxyInfo == null ? 5 : 30)),
-    );
+    await client
+        .request('server.version')
+        .timeout(Duration(seconds: (proxyInfo == null ? 5 : 30)));
 
     return true;
   } catch (e, s) {