fix: improve error handling and funding UX

lib/plugins/wallet/bitcoind/bitcoind.js

@@ -28,6 +28,9 @@ function errorHandle (e) {
       throw new E.InsufficientFundsError()
     case -18:
       return createWallet()
+    case -35:
+      // Wallet is already loaded, just return
+      return
     default:
       throw e
   }
@@ -35,16 +38,19 @@ function errorHandle (e) {
 
 function checkCryptoCode (cryptoCode) {
   if (cryptoCode !== 'BTC') return Promise.reject(new Error('Unsupported crypto: ' + cryptoCode))
-  return Promise.resolve()
+  return Promise.resolve().then(loadWallet)
 }
 
 function createWallet () {
   return fetch('createwallet', ['wallet'])
-    .catch(errorHandle)
+    .then(loadWallet)
 }
 
 function loadWallet () {
   return fetch('loadwallet', ['wallet', true])
+    // Catching the error here to suppress error code -35
+    // This improves UX on the initial wallet load and serves as error sink
+    // for wallet creation/loading related issues before actual business logic runs
     .catch(errorHandle)
 }