diff --git a/lib/messages/commands/reject.js b/lib/messages/commands/reject.js
index 5ed9543..f9c7cf1 100644
--- a/lib/messages/commands/reject.js
+++ b/lib/messages/commands/reject.js
@@ -3,19 +3,65 @@
 var Message = require('../message');
 var inherits = require('util').inherits;
 var bitcore = require('bitcore-lib');
-var BufferUtil = bitcore.util.buffer;
+var utils = require('../utils');
+var BufferReader = bitcore.encoding.BufferReader;
+var BufferWriter = bitcore.encoding.BufferWriter;
 
-// todo: add payload: https://en.bitcoin.it/wiki/Protocol_documentation#reject
+/**
+ * The reject message is sent when messages are rejected.
+ *
+ * @see https://en.bitcoin.it/wiki/Protocol_documentation#reject
+ * @param {Object=} arg - properties for the reject message
+ * @param {String=} arg.message - type of message rejected
+ * @param {Number=} arg.ccode - code relating to rejected message
+ * @param {String=} arg.reason - text version of reason for rejection
+ * @param {Buffer=} arg.data - Optional extra data provided by some errors.
+ * @param {Object} options
+ * @extends Message
+ * @constructor
+ */
 function RejectMessage(arg, options) {
+  if (!arg) {
+    arg = {};
+  }
   Message.call(this, options);
   this.command = 'reject';
+  this.message = arg.message;
+  this.ccode = arg.ccode;
+  this.reason = arg.reason;
+  this.data = arg.data;
 }
 inherits(RejectMessage, Message);
 
-RejectMessage.prototype.setPayload = function() {};
+RejectMessage.CCODE = {
+  REJECT_MALFORMED: 0x01,
+  REJECT_INVALID: 0x10,
+  REJECT_OBSOLETE: 0x11,
+  REJECT_DUPLICATE: 0x12,
+  REJECT_NONSTANDARD: 0x40,
+  REJECT_DUST: 0x41,
+  REJECT_INSUFFICIENTFEE: 0x42,
+  REJECT_CHECKPOINT: 0x43
+};
+
+RejectMessage.prototype.setPayload = function(payload) {
+  var parser = new BufferReader(payload);
+  this.message = parser.readVarLengthBuffer().toString('utf-8');
+  this.ccode = parser.readUInt8();
+  this.reason = parser.readVarLengthBuffer().toString('utf-8');
+  this.data = parser.readAll();
+  utils.checkFinished(parser);
+};
 
 RejectMessage.prototype.getPayload = function() {
-  return BufferUtil.EMPTY_BUFFER;
+  var bw = new BufferWriter();
+  bw.writeVarintNum(this.message.length);
+  bw.write(new Buffer(this.message, 'utf-8'));
+  bw.writeUInt8(this.ccode);
+  bw.writeVarintNum(this.reason.length);
+  bw.write(new Buffer(this.reason, 'utf-8'));
+  bw.write(this.data);
+  return bw.toBuffer();
 };
 
 module.exports = RejectMessage;
diff --git a/test/data/messages.json b/test/data/messages.json
index d7260b5..7b4d378 100644
--- a/test/data/messages.json
+++ b/test/data/messages.json
@@ -34,7 +34,7 @@
     "message": "f9beb4d9616c65727400000000000000bc0000004fe68fe973010000003766404f00000000b305434f00000000f2030000f1030000001027000048ee00000064000000004653656520626974636f696e2e6f72672f666562323020696620796f7520686176652074726f75626c6520636f6e6e656374696e67206166746572203230204665627275617279004730450221008389df45f0703f39ec8c1cc42c13810ffcae14995bb648340219e353b63b53eb022009ec65e1c1aaeec1fd334c6b684bde2b3f573060d5b70c3a46723326e4e8a4f1"
   },
   "reject": {
-    "message": "f9beb4d972656a656374000000000000000000005df6e0e2"
+    "message": "f9beb4d972656a6563740000000000003a000000f44033160274780015696e73756666696369656e74207072696f72697479165d408c9dd26fbdcb42b07546f6c37752301e3772f3ae441baf569e78839111"
   },
   "notfound": {
     "message": "f9beb4d96e6f74666f756e6400000000250000001d33d53201010000003a4af715be220eae7b2657582869daddf79ac4afb4a0e1cafa5b57e1afb8dfe2"
diff --git a/test/messages/commands/index.js b/test/messages/commands/index.js
index ae4d39e..e298d45 100644
--- a/test/messages/commands/index.js
+++ b/test/messages/commands/index.js
@@ -1,6 +1,7 @@
 'use strict';
 
 var should = require('chai').should();
+var expect = require('chai').expect;
 var P2P = require('../../../');
 var Messages = P2P.Messages;
 var sinon = require('sinon');
@@ -263,6 +264,43 @@ describe('Command Messages', function() {
     });
   });
 
+  describe('Reject', function() {
+    it('should set properties from arg in constructor', function() {
+      var message = messages.Reject({
+        message: 'tx',
+        ccode: 0x01,
+        reason: 'transaction is malformed',
+        data: new Buffer('12345678901234567890123456789012', 'hex')
+      });
+      message.message.should.equal('tx');
+      message.ccode.should.equal(0x01);
+      message.reason.should.equal('transaction is malformed');
+      message.data.toString('hex').should.equal('12345678901234567890123456789012');
+    });
+    it('should let arg be optional in constructor', function() {
+      var message = messages.Reject();
+      expect(message.message).to.be.undefined;
+      expect(message.ccode).to.be.undefined;
+      expect(message.reason).to.be.undefined;
+      expect(message.data).to.be.undefined;
+    });
+    it('should write payload correctly', function() {
+      var message = messages.Reject({
+        message: 'tx',
+        ccode: 0x01,
+        reason: 'transaction is malformed',
+        data: new Buffer('12345678901234567890123456789012', 'hex')
+      });
+      var payload = message.getPayload();
+      message = messages.Reject();
+      message.setPayload(payload);
+      message.message.should.equal('tx');
+      message.ccode.should.equal(0x01);
+      message.reason.should.equal('transaction is malformed');
+      message.data.toString('hex').should.equal('12345678901234567890123456789012');
+    });
+  });
+
   describe('Version', function() {
     it('should set the default relay property as true', function() {
       var message = messages.Version();