diff --git a/lib/server.js b/lib/server.js
index 14ec1bd..bf07053 100644
--- a/lib/server.js
+++ b/lib/server.js
@@ -88,7 +88,8 @@ CopayServer.prototype.createWallet = function(opts, cb) {
   var self = this,
     pubKey;
 
-  if (!Utils.checkRequired(opts, ['name', 'm', 'n', 'pubKey'])) return cb(new ClientError('Required argument missing'));
+  if (!Utils.checkRequired(opts, ['name', 'm', 'n', 'pubKey']))
+    return cb(new ClientError('Required argument missing'));
 
   if (_.isEmpty(opts.name)) return cb(new ClientError('Invalid wallet name'));
   if (!Wallet.verifyCopayerLimits(opts.m, opts.n))
@@ -154,7 +155,8 @@ CopayServer.prototype._verifySignature = function(text, signature, pubKey) {
 CopayServer.prototype.joinWallet = function(opts, cb) {
   var self = this;
 
-  if (!Utils.checkRequired(opts, ['walletId', 'name', 'xPubKey', 'xPubKeySignature'])) return cb(new ClientError('Required argument missing'));
+  if (!Utils.checkRequired(opts, ['walletId', 'name', 'xPubKey', 'xPubKeySignature']))
+    return cb(new ClientError('Required argument missing'));
 
   if (_.isEmpty(opts.name)) return cb(new ClientError('Invalid copayer name'));
 
@@ -236,7 +238,8 @@ CopayServer.prototype.getAddresses = function(opts, cb) {
 CopayServer.prototype.verifyMessageSignature = function(opts, cb) {
   var self = this;
 
-  if (!Utils.checkRequired(opts, ['message', 'signature'])) return cb(new ClientError('Required argument missing'));
+  if (!Utils.checkRequired(opts, ['message', 'signature']))
+    return cb(new ClientError('Required argument missing'));
 
   self.getWallet({}, function(err, wallet) {
     if (err) return cb(err);
@@ -389,7 +392,8 @@ CopayServer.prototype._selectUtxos = function(txp, utxos) {
 CopayServer.prototype.createTx = function(opts, cb) {
   var self = this;
 
-  if (!Utils.checkRequired(opts, ['toAddress', 'amount'])) return cb(new ClientError('Required argument missing'));
+  if (!Utils.checkRequired(opts, ['toAddress', 'amount']))
+    return cb(new ClientError('Required argument missing'));
 
   Utils.runLocked(self.walletId, cb, function(cb) {
     self.getWallet({}, function(err, wallet) {
@@ -536,7 +540,8 @@ CopayServer.prototype._broadcastTx = function(txp, cb) {
 CopayServer.prototype.signTx = function(opts, cb) {
   var self = this;
 
-  if (!Utils.checkRequired(opts, ['txProposalId', 'signatures'])) return cb(new ClientError('Required argument missing'));
+  if (!Utils.checkRequired(opts, ['txProposalId', 'signatures']))
+    return cb(new ClientError('Required argument missing'));
 
   self.getWallet({}, function(err, wallet) {
     if (err) return cb(err);
@@ -592,7 +597,8 @@ CopayServer.prototype.signTx = function(opts, cb) {
 CopayServer.prototype.rejectTx = function(opts, cb) {
   var self = this;
 
-  if (!Utils.checkRequired(opts, ['txProposalId'])) return cb(new ClientError('Required argument missing'));
+  if (!Utils.checkRequired(opts, ['txProposalId']))
+    return cb(new ClientError('Required argument missing'));
 
   self.getTx({
     id: opts.txProposalId