add payproUrl to model

lib/model/txproposal.js

@@ -24,6 +24,7 @@ TxProposal.create = function(opts) {
   x.toAddress = opts.toAddress;
   x.amount = opts.amount;
   x.message = opts.message;
+  x.payProUrl = opts.payProUrl;
   x.proposalSignature = opts.proposalSignature;
   x.changeAddress = opts.changeAddress;
   x.inputs = [];
@@ -48,6 +49,7 @@ TxProposal.fromObj = function(obj) {
   x.toAddress = obj.toAddress;
   x.amount = obj.amount;
   x.message = obj.message;
+  x.payProUrl = obj.payProUrl;
   x.proposalSignature = obj.proposalSignature;
   x.changeAddress = obj.changeAddress;
   x.inputs = obj.inputs;

lib/server.js

@@ -557,7 +557,7 @@ WalletService.prototype.createTx = function(opts, cb) {
       if (!wallet.isComplete()) return cb(new ClientError('Wallet is not complete'));
 
       var copayer = wallet.getCopayer(self.copayerId);
-      var hash = WalletUtils.getProposalHash(opts.toAddress, opts.amount, opts.message);
+      var hash = WalletUtils.getProposalHash(opts.toAddress, opts.amount, opts.message, opts.payProUrl);
       if (!self._verifySignature(hash, opts.proposalSignature, copayer.requestPubKey))
         return cb(new ClientError('Invalid proposal signature'));