check blockchain if broadcast fails

lib/server.js

@@ -920,6 +920,18 @@ WalletService.prototype._broadcastTx = function(txp, cb) {
   })
 };
 
+WalletService.prototype._checkTxInBlockchain = function(txp, cb) {
+  var tx = txp.getBitcoreTx();
+  var bc = this._getBlockchainExplorer('insight', txp.getNetworkName());
+  bc.getTransaction(tx.id, function(err, tx) {
+    if (err) {
+      log.error('Could not get transaction info', err);
+      return cb(new ClientError('BLOCKCHAINERROR', 'Could not get transaction info'));
+    }
+    return cb(null, tx);
+  })
+};
+
 /**
  * Sign a transaction proposal.
  * @param {Object} opts
@@ -993,6 +1005,20 @@ WalletService.prototype.broadcastTx = function(opts, cb) {
   if (!Utils.checkRequired(opts, ['txProposalId']))
     return cb(new ClientError('Required argument missing'));
 
+  function setBroadcasted(txp, txid, cb) {
+    txp.setBroadcasted(txid);
+    self.storage.storeTx(self.walletId, txp, function(err) {
+      if (err) return cb(err);
+
+      self._notify('NewOutgoingTx', {
+        txProposalId: opts.txProposalId,
+        txid: txid
+      }, function() {
+        return cb(null, txp);
+      });
+    });
+  };
+
   self.getWallet({}, function(err, wallet) {
     if (err) return cb(err);
 
@@ -1008,19 +1034,18 @@ WalletService.prototype.broadcastTx = function(opts, cb) {
         return cb(new ClientError('TXNOTACCEPTED', 'The transaction proposal is not accepted'));
 
       self._broadcastTx(txp, function(err, txid) {
-        if (err) return cb(err);
+        if (err) {
+          var broadcastErr = err;
+          // Check if tx already in blockchain
+          self._checkTxInBlockchain(txp, function(err, tx) {
+            if (err) return cb(err);
+            if (!tx) return cb(broadcastErr);
 
-        txp.setBroadcasted(txid);
-        self.storage.storeTx(self.walletId, txp, function(err) {
-          if (err) return cb(err);
-
-          self._notify('NewOutgoingTx', {
-            txProposalId: opts.txProposalId,
-            txid: txid
-          }, function() {
-            return cb(null, txp);
+            setBroadcasted(txp, tx.txid, cb);
           });
-        });
+        } else {
+          setBroadcasted(txp, txid, cb);
+        }
       });
     });
   });