Merge pull request #736 from braydonf/feature/to-object

Added `toObject` methods to return an `object` and modified `toJSON` to return a `string`. Closes #732

CONTRIBUTING.md

@@ -105,6 +105,19 @@ DON'T:
 var bufferUtil = require('./util/buffer');
 ```
 
+### G7 - General: Standard Methods
+
+When possible, bitcore objects should have standard methods on an instance prototype:
+* `toObject` - A plain JavaScript object that can be JSON stringified
+* `toJSON` - A JSON stringified object of the instance
+* `toString` - A string representation of the instance
+* `toBuffer` - A hex Buffer
+
+These should have a matching static method that can be used for instantiation:
+* `fromJSON` - Should handle both JSON from `toJSON` and plain JavaScript object from `toObject`
+* `fromString` - Should be able to instantiate with output from `toString`
+* `fromBuffer` - Should likewise be able to instantiate from output from `toBuffer`
+
 ### E1 - Errors: Use bitcore.Errors
 
 We've designed a structure for Errors to follow and are slowly migrating to it.

lib/address.js

@@ -1,5 +1,6 @@
 'use strict';
 
+var $ = require('./util/preconditions');
 var base58check = require('./encoding/base58check');
 var Networks = require('./networks');
 var Hash = require('./crypto/hash');
@@ -316,6 +317,10 @@ Address.fromJSON = function fromJSON(json) {
   if (JSUtil.isValidJSON(json)) {
     json = JSON.parse(json);
   }
+  $.checkState(
+    JSUtil.isHexa(json.hash), 
+    'Unexpected hash property, "' + json.hash + '", expected to be hex.'
+  );
   var hashBuffer = new Buffer(json.hash, 'hex');
   return new Address(hashBuffer, json.network, json.type);
 };
@@ -390,7 +395,7 @@ Address.prototype.toBuffer = function() {
 /**
  * @returns {Object} An object of the address
  */
-Address.prototype.toJSON = function toJSON() {
+Address.prototype.toObject = function toObject() {
   return {
     hash: this.hashBuffer.toString('hex'),
     type: this.type,
@@ -398,6 +403,13 @@ Address.prototype.toJSON = function toJSON() {
   };
 };
 
+/**
+ * @returns {Object} An object of the address
+ */
+Address.prototype.toJSON = function toJSON() {
+  return JSON.stringify(this.toObject());
+};
+
 /**
  * Will return a the string representation of the address
  *

lib/block.js

@@ -70,7 +70,7 @@ Block._fromJSON = function _fromJSON(data) {
     magicnum: data.magicnum,
     blocksize: data.blocksize,
     blockheader: BlockHeader.fromJSON(data.blockheader),
-    txsvi: Varint().fromJSON(data.txsvi),
+    txsvi: Varint().fromString(data.txsvi),
     txs: txs
   };
   return info;
@@ -144,9 +144,9 @@ Block.fromRawBlock = function fromRawBlock(data) {
 };
 
 /**
- * @returns {Object} - A JSON object with the block properties
+ * @returns {Object} - A plain object with the block properties
  */
-Block.prototype.toJSON = function toJSON() {
+Block.prototype.toObject = function toObject() {
   var txs = [];
   this.txs.forEach(function(tx) {
     txs.push(tx.toJSON());
@@ -154,12 +154,19 @@ Block.prototype.toJSON = function toJSON() {
   return {
     magicnum: this.magicnum,
     blocksize: this.blocksize,
-    blockheader: this.blockheader.toJSON(),
+    blockheader: this.blockheader.toObject(),
-    txsvi: this.txsvi.toJSON(),
+    txsvi: this.txsvi.toString(),
     txs: txs
   };
 };
 
+/**
+ * @returns {String} - A JSON string
+ */
+Block.prototype.toJSON = function toJSON() {
+  return JSON.stringify(this.toObject());
+};
+
 /**
  * @returns {Buffer} - A buffer of the block
  */

lib/blockheader.js

@@ -139,9 +139,9 @@ BlockHeader.fromBufferReader = function fromBufferReader(br) {
 };
 
 /**
- * @returns {Object} - A JSON object of the BlockHeader
+ * @returns {Object} - A plain object of the BlockHeader
  */
-BlockHeader.prototype.toJSON = function toJSON() {
+BlockHeader.prototype.toObject = function toObject() {
   return {
     version: this.version,
     prevblockidbuf: this.prevblockidbuf.toString('hex'),
@@ -152,6 +152,13 @@ BlockHeader.prototype.toJSON = function toJSON() {
   };
 };
 
+/**
+ * @returns {String} - A JSON string
+ */
+BlockHeader.prototype.toJSON = function toJSON() {
+  return JSON.stringify(this.toObject());
+};
+
 /**
  * @returns {Buffer} - A Buffer of the BlockHeader
  */

lib/crypto/bn.js

@@ -19,16 +19,6 @@ var reversebuf = function(buf) {
   return buf2;
 };
 
-BN.prototype.toJSON = function() {
-  return this.toString();
-};
-
-BN.prototype.fromJSON = function(str) {
-  var bn = BN(str);
-  bn.copy(this);
-  return this;
-};
-
 BN.prototype.fromNumber = function(n) {
   var bn = BN(n);
   bn.copy(this);

lib/encoding/varint.js

@@ -26,14 +26,14 @@ Varint.prototype.set = function(obj) {
   return this;
 };
 
-Varint.prototype.fromJSON = function(json) {
+Varint.prototype.fromString = function(str) {
   this.set({
-    buf: new Buffer(json, 'hex')
+    buf: new Buffer(str, 'hex')
   });
   return this;
 };
 
-Varint.prototype.toJSON = function() {
+Varint.prototype.toString = function() {
   return this.buf.toString('hex');
 };
 

lib/hdprivatekey.js

@@ -406,7 +406,7 @@ HDPrivateKey.prototype.toString = function() {
  *
  *  @return {Object}
  */
-HDPrivateKey.prototype.toJSON = function() {
+HDPrivateKey.prototype.toObject = function toObject() {
   return {
     network: Network.get(BufferUtil.integerFromBuffer(this._buffers.version)).name,
     depth: BufferUtil.integerFromSingleByteBuffer(this._buffers.depth),
@@ -420,6 +420,10 @@ HDPrivateKey.prototype.toJSON = function() {
   };
 };
 
+HDPrivateKey.prototype.toJSON = function toJSON() {
+  return JSON.stringify(this.toObject());
+};
+
 HDPrivateKey.DefaultDepth = 0;
 HDPrivateKey.DefaultFingerprint = 0;
 HDPrivateKey.DefaultChildIndex = 0;

lib/hdpublickey.js

@@ -366,7 +366,7 @@ HDPublicKey.prototype.toString = function () {
  *  * xpubkey: the string with the base58 representation of this extended key
  *  * checksum: the base58 checksum of xpubkey
  */
-HDPublicKey.prototype.toJSON = function () {
+HDPublicKey.prototype.toObject = function toObject() {
   return {
     network: Network.get(BufferUtil.integerFromBuffer(this._buffers.version)).name,
     depth: BufferUtil.integerFromSingleByteBuffer(this._buffers.depth),
@@ -380,6 +380,10 @@ HDPublicKey.prototype.toJSON = function () {
   };
 };
 
+HDPublicKey.prototype.toJSON = function toJSON() {
+  return JSON.stringify(this.toObject());
+};
+
 HDPublicKey.Hardened = 0x80000000;
 HDPublicKey.RootElementAlias = ['m', 'M'];
 

lib/privatekey.js

@@ -310,11 +310,9 @@ PrivateKey.prototype.toAddress = function() {
 };
 
 /**
- * Will output the PrivateKey to a WIF string
+ * @returns {Object} A plain object representation
- *
- * @returns {String} A WIF representation of the private key
  */
-PrivateKey.prototype.toJSON = function() {
+PrivateKey.prototype.toObject = function toObject() {
   return {
     bn: this.bn.toString('hex'),
     compressed: this.compressed,
@@ -322,6 +320,10 @@ PrivateKey.prototype.toJSON = function() {
   };
 };
 
+PrivateKey.prototype.toJSON = function toJSON() {
+  return JSON.stringify(this.toObject());
+};
+
 /**
  * Will output the PrivateKey to a WIF string
  *

lib/publickey.js

@@ -6,7 +6,6 @@ var Point = require('./crypto/point');
 var JSUtil = require('./util/js');
 
 /**
- *
  * Instantiate a PublicKey from a 'PrivateKey', 'Point', 'string', 'Buffer'.
  *
  * @example
@@ -137,7 +136,6 @@ PublicKey._transformDER = function(buf){
 };
 
 /**
- *
  * Internal function to transform X into a public key point
  *
  * @param {Boolean} odd - If the point is above or below the x axis
@@ -155,7 +153,6 @@ PublicKey._transformX = function(odd, x){
 };
 
 /**
- *
  * Instantiate a PublicKey from JSON
  *
  * @param {String} json - A JSON string
@@ -172,7 +169,6 @@ PublicKey.fromJSON = function(json) {
 };
 
 /**
- *
  * Instantiate a PublicKey from a PrivateKey
  *
  * @param {PrivateKey} privkey - An instance of PrivateKey
@@ -184,7 +180,6 @@ PublicKey.fromPrivateKey = function(privkey) {
 };
 
 /**
- *
  * Instantiate a PublicKey from a Buffer
  *
  * @param {Buffer} buf - A DER hex buffer
@@ -196,7 +191,6 @@ PublicKey.fromBuffer = function(buf) {
 };
 
 /**
- *
  * Instantiate a PublicKey from a Point
  *
  * @param {Point} point - A Point instance
@@ -210,7 +204,6 @@ PublicKey.fromPoint = function(point, compressed){
 };
 
 /**
- *
  * Instantiate a PublicKey from a DER Buffer
  *
  * @param {Buffer} buf - A DER Buffer
@@ -222,7 +215,6 @@ PublicKey.fromDER = function(buf) {
 };
 
 /**
- *
  * Instantiate a PublicKey from a DER hex encoded string
  *
  * @param {String} str - A DER hex string
@@ -236,7 +228,6 @@ PublicKey.fromString = function(str, encoding) {
 };
 
 /**
- *
  * Instantiate a PublicKey from an X Point
  *
  * @param {Boolean} odd - If the point is above or below the x axis
@@ -250,7 +241,6 @@ PublicKey.fromX = function(odd, x) {
 
 
 /**
- *
  * Check if there would be any errors when initializing a PublicKey
  *
  * @param {String} data - The encoded data in various formats
@@ -268,7 +258,6 @@ PublicKey.getValidationError = function(data) {
 };
 
 /**
- *
  * Check if the parameters are valid
  *
  * @param {String} data - The encoded data in various formats
@@ -280,12 +269,9 @@ PublicKey.isValid = function(data) {
 };
 
 /**
- *
+ * @returns {Object} A plain object of the PublicKey
- * Will output the PublicKey to JSON
- *
- * @returns {Object} A JSON object
  */
-PublicKey.prototype.toJSON = function() {
+PublicKey.prototype.toObject = function toObject() {
   return {
     x: this.point.getX().toString('hex'),
     y: this.point.getY().toString('hex'),
@@ -293,8 +279,11 @@ PublicKey.prototype.toJSON = function() {
   };
 };
 
+PublicKey.prototype.toJSON = function toJSON(){
+  return JSON.stringify(this.toObject());
+};
+
 /**
- *
  * Will output the PublicKey to a Buffer
  *
  * @returns {Buffer} A DER hex encoded buffer
@@ -305,7 +294,6 @@ PublicKey.prototype.toBuffer = function() {
 };
 
 /**
- *
  * Will output the PublicKey to a DER Buffer
  *
  * @returns {Buffer} A DER hex encoded buffer
@@ -338,7 +326,6 @@ PublicKey.prototype.toDER = function(compressed) {
 };
 
 /**
- *
  * Will return an address for the public key
  *
  * @returns {Address} An address generated from the public key
@@ -348,7 +335,6 @@ PublicKey.prototype.toAddress = function(network) {
 };
 
 /**
- *
  * Will output the PublicKey to a DER encoded hex string
  *
  * @returns {String} A DER hex encoded string
@@ -359,7 +345,6 @@ PublicKey.prototype.toString = function() {
 };
 
 /**
- *
  * Will return a string formatted for the console
  *
  * @returns {String} Public key

lib/transaction/input/input.js

@@ -4,7 +4,7 @@ var _ = require('lodash');
 var BufferWriter = require('../../encoding/bufferwriter');
 var buffer = require('buffer');
 var bufferUtil = require('../../util/buffer');
-var jsUtil = require('../../util/js');
+var JSUtil = require('../../util/js');
 var Script = require('../../script');
 
 function Input(params) {
@@ -28,7 +28,7 @@ Object.defineProperty(Input.prototype, 'script', {
 });
 
 Input.prototype._fromObject = function(params) {
-  if (_.isString(params.prevTxId) && jsUtil.isHexa(params.prevTxId)) {
+  if (_.isString(params.prevTxId) && JSUtil.isHexa(params.prevTxId)) {
     params.prevTxId = new buffer.Buffer(params.prevTxId, 'hex');
   }
   this.prevTxId = params.prevTxId;
@@ -40,7 +40,7 @@ Input.prototype._fromObject = function(params) {
   return this;
 };
 
-Input.prototype.toJSON = function() {
+Input.prototype.toObject = function toObject() {
   return {
     prevTxId: this.prevTxId,
     outputIndex: this.outputIndex,
@@ -49,7 +49,14 @@ Input.prototype.toJSON = function() {
   };
 };
 
+Input.prototype.toJSON = function toJSON() {
+  return JSON.stringify(this.toObject());
+};
+
 Input.fromJSON = function(json) {
+  if (JSUtil.isValidJSON(json)) {
+    json = JSON.parse(json);
+  }
   return new Input({
     prevTxId: json.prevTxId || json.txidbuf,
     outputIndex: json.outputIndex || json.txoutnum,

lib/transaction/output.js

@@ -4,6 +4,7 @@ var _ = require('lodash');
 var BN = require('../crypto/bn');
 var buffer = require('buffer');
 var bufferUtil = require('../util/buffer');
+var JSUtil = require('../util/js');
 var BufferWriter = require('../encoding/bufferwriter');
 var Script = require('../script');
 
@@ -53,14 +54,21 @@ Output.prototype._fromObject = function(param) {
   return this;
 };
 
-Output.prototype.toJSON = function() {
+Output.prototype.toObject = function toObject() {
   return {
     satoshis: this.satoshis,
     script: this._scriptBuffer.toString('hex')
   };
 };
 
+Output.prototype.toJSON = function toJSON() {
+  return JSON.stringify(this.toObject());
+};
+
 Output.fromJSON = function(json) {
+  if (JSUtil.isValidJSON(json)) {
+    json = JSON.parse(json);
+  }
   return new Output({
     satoshis: json.satoshis || -(-json.valuebn),
     script: new Script(json.script)

lib/transaction/transaction.js

@@ -6,6 +6,7 @@ var assert = require('assert');
 
 var util = require('../util/js');
 var bufferUtil = require('../util/buffer');
+var JSUtil = require('../util/js');
 var BufferReader = require('../encoding/bufferreader');
 var BufferWriter = require('../encoding/bufferwriter');
 var Hash = require('../crypto/hash');
@@ -121,6 +122,9 @@ Transaction.prototype.fromBufferReader = function(reader) {
 };
 
 Transaction.prototype.fromJSON = function(json) {
+  if (JSUtil.isValidJSON(json)) {
+    json = JSON.parse(json);
+  }
   var self = this;
   this.inputs = [];
   var inputs = json.inputs || json.txins;
@@ -137,7 +141,7 @@ Transaction.prototype.fromJSON = function(json) {
   return this;
 };
 
-Transaction.prototype.toJSON = function() {
+Transaction.prototype.toObject = function toObject() {
   var inputs = [];
   this.inputs.forEach(function(input) {
     inputs.push(input.toJSON());
@@ -154,11 +158,12 @@ Transaction.prototype.toJSON = function() {
   };
 };
 
-Transaction.prototype.fromString = function(string) {
+Transaction.prototype.toJSON = function toJSON() {
-  this.fromBuffer(new buffer.Buffer(string, 'hex'));
+  return JSON.stringify(this.toObject());
 };
 
-Transaction.prototype.fromObject = function(object) {
+Transaction.prototype.fromString = function(string) {
+  this.fromBuffer(new buffer.Buffer(string, 'hex'));
 };
 
 Transaction.prototype._newTransaction = function() {

lib/unit.js

@@ -175,17 +175,21 @@ Unit.prototype.toString = function() {
 };
 
 /**
- * Will return a the JSON object representation of the unit
+ * Will return a plain object representation of the Unit
  *
  * @returns {Object} An object with the keys: amount and code
  */
-Unit.prototype.toJSON = function toJSON(){
+Unit.prototype.toObject = function toObject() {
   return {
     amount: this._amount,
     code: this._code
   };
 };
 
+Unit.prototype.toJSON = function toJSON() {
+  return JSON.stringify(this.toObject());
+};
+
 /**
  * Will return a string formatted for the console
  *

lib/uri.js

@@ -163,7 +163,7 @@ URI.prototype._parseAmount = function(amount) {
   return Unit.fromBTC(amount).toSatoshis();
 };
 
-URI.prototype.toJSON = function() {
+URI.prototype.toObject = function toObject() {
   var json = {};
   for (var i = 0; i < URI.Members.length; i++) {
     var m = URI.Members[i];
@@ -179,6 +179,10 @@ URI.prototype.toJSON = function() {
   return json;
 };
 
+URI.prototype.toJSON = function toJSON() {
+  return JSON.stringify(this.toObject());
+};
+
 /**
  * Will return a the string representation of the URI
  *

test/address.js

@@ -363,7 +363,7 @@ describe('Address', function() {
     });
 
     it('should output/input a JSON string', function() {
-      var json = JSON.stringify(new Address(str).toJSON());
+      var json = new Address(str).toJSON();
       var address = Address.fromJSON(json);
       address.toString().should.equal(str);
     });

test/block.js

@@ -107,8 +107,8 @@ describe('Block', function() {
   describe('#toJSON', function() {
 
     it('should recover these known values', function() {
-      var block = Block(json);
+      var block = Block.fromJSON(json);
-      var b = block.toJSON();
+      var b = JSON.parse(block.toJSON());
       should.exist(b.magicnum);
       should.exist(b.blocksize);
       should.exist(b.blockheader);

test/blockheader.js

@@ -87,7 +87,7 @@ describe('BlockHeader', function() {
   describe('#toJSON', function() {
 
     it('should set all the variables', function() {
-      var json = bh.toJSON();
+      var json = JSON.parse(bh.toJSON());
       should.exist(json.version);
       should.exist(json.prevblockidbuf);
       should.exist(json.merklerootbuf);

test/crypto/bn.js

@@ -67,23 +67,6 @@ describe('BN', function() {
 
   });
 
-  describe('#fromJSON', function() {
-    
-    it('should make BN from a string', function() {
-      BN().fromJSON('5').toString().should.equal('5');
-    });
-
-  });
-
-  describe('#toJSON', function() {
-    
-    it('should make string from a BN', function() {
-      BN(5).toJSON().should.equal('5');
-      BN().fromJSON('5').toJSON().should.equal('5');
-    });
-
-  });
-
   describe('#fromString', function() {
     
     it('should make BN from a string', function() {

test/encoding/varint.js

@@ -36,22 +36,22 @@ describe('Varint', function() {
 
   });
 
-  describe('#fromJSON', function() {
+  describe('#fromString', function() {
     
     it('should set a buffer', function() {
       var buf = BufferWriter().writeVarintNum(5).concat();
-      var varint = Varint().fromJSON(buf.toString('hex'));
+      var varint = Varint().fromString(buf.toString('hex'));
       varint.toNumber().should.equal(5);
     });
 
   });
 
-  describe('#toJSON', function() {
+  describe('#toString', function() {
     
     it('should return a buffer', function() {
       var buf = BufferWriter().writeVarintNum(5).concat();
-      var varint = Varint().fromJSON(buf.toString('hex'));
+      var varint = Varint().fromString(buf.toString('hex'));
-      varint.toJSON().should.equal('05');
+      varint.toString().should.equal('05');
     });
 
   });

test/privatekey.js

@@ -132,11 +132,11 @@ describe('PrivateKey', function() {
   describe('#json', function() {
 
     it('should input/output json', function() {
-      var json = {
+      var json = JSON.stringify({
         bn: '96c132224121b509b7d0a16245e957d9192609c5637c6228311287b1be21627a',
         compressed: false,
         network: 'livenet'
-      };
+      });
       PrivateKey.fromJSON(json).toJSON().should.deep.equal(json);
     });
 

test/publickey.js

@@ -124,11 +124,11 @@ describe('PublicKey', function() {
   describe('#json', function() {
 
     it('should input/ouput json', function() {
-      var json = {
+      var json = JSON.stringify({
         x: '1ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a',
         y: '7baad41d04514751e6851f5304fd243751703bed21b914f6be218c0fa354a341',
         compressed: false
-      };
+      });
       PublicKey.fromJSON(json).toJSON().should.deep.equal(json);
     });
 

test/unit.js

@@ -124,7 +124,7 @@ describe('Unit', function() {
   });
 
   it('should input/output JSON', function() {
-    var json = {amount:1.3, code:'BTC'};
+    var json = JSON.stringify({amount:1.3, code:'BTC'});
     var unit = Unit.fromJSON(json);
     unit.toJSON().should.deep.equal(json);
   });

test/uri.js

@@ -146,12 +146,12 @@ describe('URI', function() {
   });
 
   it('should input/output JSON', function() {
-    var json = {
+    var json = JSON.stringify({
       address: '1DP69gMMvSuYhbnxsi4EJEFufUAbDrEQfj',
       message: 'Donation for project xyz',
       label: 'myLabel',
       other: 'xD'
-    };
+    });
     URI.fromJSON(json).toJSON().should.deep.equal(json);
   });