diff --git a/lib/server.js b/lib/server.js
index 44ad8b4..4bf9320 100644
--- a/lib/server.js
+++ b/lib/server.js
@@ -485,7 +485,10 @@ CopayServer.prototype.signTx = function(opts, cb) {
 
   Utils.checkRequired(opts, ['walletId', 'copayerId', 'txProposalId', 'signatures']);
 
-  self.fetchTx(opts.walletId, opts.txProposalId, function(err, txp) {
+  self.getTx({
+    walletId: opts.walletId,
+    id: opts.txProposalId
+  }, function(err, txp) {
     if (err) return cb(err);
     if (!txp) return cb(new ClientError('Transaction proposal not found'));
     var action = _.find(txp.actions, {
@@ -507,7 +510,7 @@ CopayServer.prototype.signTx = function(opts, cb) {
           self.storage.storeTx(opts.walletId, txp, function(err) {
             if (err) return cb(err);
 
-            return cb(null,txp);
+            return cb(null, txp);
           });
         });
       } else {
@@ -530,7 +533,10 @@ CopayServer.prototype.rejectTx = function(opts, cb) {
 
   Utils.checkRequired(opts, ['walletId', 'copayerId', 'txProposalId']);
 
-  self.fetchTx(opts.walletId, opts.txProposalId, function(err, txp) {
+  self.getTx({
+    walletId: opts.walletId,
+    id: opts.txProposalId
+  }, function(err, txp) {
     if (err) return cb(err);
     if (!txp) return cb(new ClientError('Transaction proposal not found'));
     var action = _.find(txp.actions, {