Fix CORS (#174)

Fix CORS
Co-authored-by: Özgün Özerk <ozgun@subspace.network>

src-tauri/src/node.rs

@@ -171,9 +171,17 @@ fn create_configuration<CS: ChainSpec + 'static>(
         rpc_http: None,
         rpc_ws: Some("127.0.0.1:9944".parse().expect("IP and port are valid")),
         rpc_ipc: None,
-        rpc_methods: RpcMethods::Unsafe,
+        rpc_methods: RpcMethods::Safe,
         rpc_ws_max_connections: None,
-        rpc_cors: None,
+        // Below CORS are default from Substrate
+        rpc_cors: Some(vec![
+            "http://localhost:*".to_string(),
+            "http://127.0.0.1:*".to_string(),
+            "https://localhost:*".to_string(),
+            "https://127.0.0.1:*".to_string(),
+            "https://polkadot.js.org".to_string(),
+            "tauri://localhost".to_string(),
+        ]),
         rpc_max_payload: None,
         ws_max_out_buffer_capacity: None,
         prometheus_config: None,