add network to txproposal model

lib/model/txproposal.js

@@ -36,6 +36,7 @@ TxProposal.create = function(opts) {
   x.actions = [];
   x.outputOrder = _.shuffle(_.range(2));
   x.fee = null;
+  x.network = Bitcore.Address(x.toAddress).toObject().network;
 
   return x;
 };
@@ -66,6 +67,7 @@ TxProposal.fromObj = function(obj) {
   });
   x.outputOrder = obj.outputOrder;
   x.fee = obj.fee;
+  x.network = obj.network;
 
   return x;
 };

test/integration/server.js

@@ -882,6 +882,7 @@ describe('Wallet service', function() {
           should.not.exist(err);
           should.exist(tx);
           tx.walletId.should.equal(wallet.id);
+          tx.network.should.equal('livenet');
           tx.creatorId.should.equal(wallet.copayers[0].id);
           tx.message.should.equal('some message');
           tx.isAccepted().should.equal.false;

test/models/txproposal.js

@@ -94,6 +94,7 @@ var aTXP = function() {
     "walletId": "1",
     "creatorId": "1",
     "toAddress": "18PzpUFkFZE8zKWUPvfykkTxmB9oMR8qP7",
+    "network": "livenet",
     "amount": 50000000,
     "message": 'some message',
     "proposalSignature": '7035022100896aeb8db75fec22fddb5facf791927a996eb3aee23ee6deaa15471ea46047de02204c0c33f42a9d3ff93d62738712a8c8a5ecd21b45393fdd144e7b01b5a186f1f9',

test/storage.js

@@ -133,6 +133,7 @@ describe('Storage', function() {
         proposals = _.map(_.range(4), function(i) {
           var tx = Model.TxProposal.create({
             walletId: '123',
+            toAddress: '18PzpUFkFZE8zKWUPvfykkTxmB9oMR8qP7',
             creatorId: wallet.copayers[0].id,
             amount: i + 100,
           });