Merge remote-tracking branch 'olalonde/electrum'
This commit is contained in:
commit
7f7d076c7f
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@ -49,6 +49,7 @@ requireWhenAccessed('Wallet', './lib/Wallet');
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requireWhenAccessed('WalletKey', './lib/WalletKey');
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requireWhenAccessed('PeerManager', './lib/PeerManager');
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requireWhenAccessed('Message', './lib/Message');
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requireWhenAccessed('Electrum', './lib/Electrum');
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module.exports.Buffer = Buffer;
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if (typeof process.versions === 'undefined') {
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@ -30,6 +30,7 @@ var modules = [
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'lib/Bloom',
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'lib/Connection',
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'lib/Deserialize',
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'lib/Electrum',
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'lib/Message',
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'lib/Opcode',
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'lib/Peer',
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@ -0,0 +1,11 @@
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var Electrum = require('../lib/Electrum');
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var Address = require('../lib/Address');
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var mpk = '92eea4d2f5263651db9e3222caded1fd4c89772f79a7c03fb6afc00e9d2c9d2ed9b86c2c95fc1171e49163079dacb7f048b3c509a27a490e1df9e7128362d468';
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mpk = new Electrum(mpk);
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var key0 = mpk.generatePubKey(0);
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var addr0 = Address.fromPubKey(key0);
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console.log(addr0.as('base58'));
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@ -0,0 +1,54 @@
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var Key = require('./Key'),
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Point = require('./Point'),
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twoSha256 = require('../util').twoSha256,
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buffertools = require('buffertools'),
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bignum = require('bignum');
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/**
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* Pre-BIP32 Electrum public key derivation (electrum <2.0)
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*
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* For now, this class can only understands master public keys.
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* It doesn't support derivation from a private master key (TODO).
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*
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* @example examples/ElectrumMPK.js
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*/
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function Electrum (master_public_key) {
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this.mpk = new Buffer(master_public_key, 'hex');
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}
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Electrum.prototype.getSequence = function (for_change, n) {
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var mode = for_change ? 1 : 0;
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var buf = Buffer.concat([ new Buffer(n + ':' + mode + ':', 'utf8'), this.mpk ]);
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return bignum.fromBuffer(twoSha256(buf));
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};
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Electrum.prototype.generatePubKey = function (n, for_change) {
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var x = bignum.fromBuffer(this.mpk.slice(0, 32), { size: 32 });
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var y = bignum.fromBuffer(this.mpk.slice(32, 64), { size: 32 });
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var mpk_pt = new Point(x, y);
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var sequence = this.getSequence(for_change, n);
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var sequence_key = new Key();
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sequence_key.private = sequence.toBuffer();
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sequence_key.regenerateSync();
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var sequence_pt = Point.fromKey(sequence_key);
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pt = Point.add(mpk_pt, sequence_pt);
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var xbuf = pt.x.toBuffer({ size: 32 });
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var ybuf = pt.y.toBuffer({ size: 32 });
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var prefix = new Buffer([0x04]);
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var key = new Key();
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key.compressed = false;
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key.public = Buffer.concat([prefix, xbuf, ybuf]);
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return key.public;
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};
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Electrum.prototype.generateChangePubKey = function (sequence) {
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return this.generatePubKey(sequence, true);
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};
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module.exports = Electrum;
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@ -317,6 +317,7 @@ Key::SetPublic(Local<String> property, Local<Value> value, const AccessorInfo& i
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if (!ret) {
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// TODO: Error
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VException("Invalid public key.");
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return;
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}
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@ -22,6 +22,7 @@
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<script src="test.Bloom.js"></script>
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<script src="test.Connection.js"></script>
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<script src="test.EncodedData.js"></script>
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<script src="test.Electrum.js"></script>
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<script src="test.Key.js"></script>
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<script src="test.main.js"></script>
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<script src="test.Message.js"></script>
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@ -0,0 +1,78 @@
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'use strict';
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var chai = chai || require('chai');
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var bitcore = bitcore || require('../bitcore');
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var should = chai.should();
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var Electrum = bitcore.Electrum;
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var Address = bitcore.Address;
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var mpk = '92eea4d2f5263651db9e3222caded1fd4c89772f79a7c03fb6afc00e9d2c9d2ed9b86c2c95fc1171e49163079dacb7f048b3c509a27a490e1df9e7128362d468';
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/**
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* The hard coded values (expected public key / address hash) were retrieved
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* by creating an Electrum wallet and looking which addresses were generated for
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* master public key mpk. Not very rigorous but it will help catch regressions.
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*/
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describe('Electrum', function() {
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it('should initialze the main object', function() {
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should.exist(Electrum);
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});
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it('should be able to create instance', function() {
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var elec = new Electrum(mpk);
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should.exist(elec);
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});
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it('should be able to call generatePubKey', function() {
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var elec = new Electrum(mpk);
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(function () {
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elec.generatePubKey(0);
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}).should.not.throw(Error);
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});
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it('should be able to call generateChangePubKey', function() {
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var elec = new Electrum(mpk);
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(function () {
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elec.generateChangePubKey(0);
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}).should.not.throw(Error);
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});
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it('should generate correct public key at sequence 0', function() {
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var elec = new Electrum(mpk);
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var pubkey = elec.generatePubKey(0);
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var addr = Address.fromPubKey(pubkey);
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addr.as('base58').should.equal('15Ur7LV4hZFvFYQHkB12g1mdnKuHyHBDiW');
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});
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it('should generate correct (change) public keys at sequence 0,1,2', function() {
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var expected_values = {
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receiving: [
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'15Ur7LV4hZFvFYQHkB12g1mdnKuHyHBDiW',
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'19K48MhyXK4qChGCUJzAHxLFjbQRg9tb9F',
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'1EfoxVmRVzYf1a1WELv2qMvEEpu2u5pXsy'
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],
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change: [
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'138EGyTTyXFuqWBr8Jd7qmPbnfJUFmmuQg',
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'12H7HZhtn7aNpTySXysKXiyxULybMktukh',
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'1KMEUhmmiSdjX9fsv8aCAiYnVZnTTjqx7W'
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]
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};
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var elec = new Electrum(mpk);
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var pubkey, addr, addr_change;
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for (var i = 0; i < expected_values.receiving.length; i++) {
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//receiving
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pubkey = elec.generatePubKey(i);
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addr = Address.fromPubKey(pubkey);
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addr.as('base58').should.equal(expected_values.receiving[i]);
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//change
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pubkey = elec.generateChangePubKey(i);
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addr = Address.fromPubKey(pubkey);
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console.log('change');
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addr.as('base58').should.equal(expected_values.change[i]);
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}
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});
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});
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