add tx note as model

lib/model/index.js

@@ -8,5 +8,6 @@ Model.Address = require('./address');
 Model.Notification = require('./notification');
 Model.Preferences = require('./preferences');
 Model.Email = require('./email');
+Model.TxNote = require('./txnote');
 
 module.exports = Model;

lib/model/txnote.js

@@ -0,0 +1,34 @@
+var _ = require('lodash');
+var Uuid = require('uuid');
+
+function TxNote() {};
+
+TxNote.create = function(opts) {
+  opts = opts || {};
+
+  var x = new TxNote();
+
+  x.version = 1;
+  x.walletId = opts.walletId;
+  x.txid = opts.txid;
+  x.body = opts.body;
+  x.lastEditedOn = Math.floor(Date.now() / 1000);
+  x.lastEditedById = opts.lastEditedById;
+
+  return x;
+};
+
+TxNote.fromObj = function(obj) {
+  var x = new TxNote();
+
+  x.version = obj.version;
+  x.walletId = obj.walletId;
+  x.txid = obj.txid;
+  x.body = obj.body;
+  x.lastEditedOn = obj.lastEditedOn;
+  x.lastEditedById = obj.lastEditedById;
+
+  return x;
+};
+
+module.exports = TxNote;