533 lines
13 KiB
JavaScript
533 lines
13 KiB
JavaScript
'use strict';
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var _ = require('lodash');
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var $ = require('preconditions').singleton();
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var util = require('util');
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var async = require('async');
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var log = require('npmlog');
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var request = require('request')
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log.debug = log.verbose;
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var Bitcore = require('bitcore')
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var WalletUtils = require('../walletutils');
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var Verifier = require('./verifier');
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var ServerCompromisedError = require('./servercompromisederror')
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var BASE_URL = 'http://localhost:3001/copay/api';
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var WALLET_CRITICAL_DATA = ['xPrivKey', 'm', 'publicKeyRing', 'sharedEncryptingKey'];
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function _encryptProposalMessage(message, encryptingKey) {
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if (!message) return null;
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return WalletUtils.encryptMessage(message, encryptingKey);
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};
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function _decryptProposalMessage(message, encryptingKey) {
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if (!message) return '';
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try {
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return WalletUtils.decryptMessage(message, encryptingKey);
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} catch (ex) {
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return '<ECANNOTDECRYPT>';
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}
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};
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function _parseError(body) {
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if (_.isString(body)) {
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try {
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body = JSON.parse(body);
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} catch (e) {
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body = {
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error: body
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};
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}
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}
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var code = body.code || 'ERROR';
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var message = body.error || 'There was an unknown error processing the request';
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log.error(code, message);
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};
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function _signRequest(method, url, args, privKey) {
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var message = method.toLowerCase() + '|' + url + '|' + JSON.stringify(args);
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return WalletUtils.signMessage(message, privKey);
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};
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function API(opts) {
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if (!opts.storage) {
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throw new Error('Must provide storage option');
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}
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this.storage = opts.storage;
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this.verbose = !!opts.verbose;
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this.request = request || opts.request;
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this.baseUrl = opts.baseUrl || BASE_URL;
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if (this.verbose) {
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log.level = 'debug';
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}
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};
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API.prototype._tryToComplete = function(data, cb) {
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var self = this;
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var url = '/v1/wallets/';
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self._doGetRequest(url, data, function(err, ret) {
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if (err) return cb(err);
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var wallet = ret.wallet;
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if (wallet.status != 'complete')
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return cb('Wallet Incomplete');
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if (!Verifier.checkCopayers(wallet.copayers, data.walletPrivKey, data.xPrivKey, data.n))
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return cb('Some copayers in the wallet could not be verified to have known the wallet secret');
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data.publicKeyRing = _.pluck(wallet.copayers, 'xPubKey')
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self.storage.save(data, function(err) {
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return cb(err, data);
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});
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});
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};
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API.prototype._load = function(cb) {
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var self = this;
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this.storage.load(function(err, data) {
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if (err || !data) {
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return cb(err || 'Wallet file not found.');
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}
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return cb(null, data);
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});
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};
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API.prototype._loadAndCheck = function(cb) {
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var self = this;
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this._load(function(err, data) {
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if (err) return cb(err);
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if (data.n > 1) {
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var pkrComplete = data.publicKeyRing && data.m && data.publicKeyRing.length === data.n;
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if (!pkrComplete) {
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return self._tryToComplete(data, cb);
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}
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}
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return cb(null, data);
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});
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};
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API.prototype._doRequest = function(method, url, args, data, cb) {
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var reqSignature;
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data = data || {};
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if (data.signingPrivKey)
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reqSignature = _signRequest(method, url, args, data.signingPrivKey);
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var absUrl = this.baseUrl + url;
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var args = {
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headers: {
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'x-identity': data.copayerId,
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'x-signature': reqSignature,
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},
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method: method,
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url: absUrl,
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body: args,
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json: true,
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};
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log.verbose('Request Args', util.inspect(args, {
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depth: 10
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}));
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this.request(args, function(err, res, body) {
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log.verbose(util.inspect(body, {
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depth: 10
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}));
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if (err) return cb(err);
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if (res.statusCode != 200) {
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_parseError(body);
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return cb('Request error');
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}
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return cb(null, body);
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});
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};
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API.prototype._doPostRequest = function(url, args, data, cb) {
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return this._doRequest('post', url, args, data, cb);
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};
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API.prototype._doGetRequest = function(url, data, cb) {
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return this._doRequest('get', url, {}, data, cb);
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};
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API.prototype._initData = function(network, walletPrivKey, m, n) {
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var xPrivKey = new Bitcore.HDPrivateKey(network);
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var xPubKey = (new Bitcore.HDPublicKey(xPrivKey)).toString();
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var signingPrivKey = (new Bitcore.HDPrivateKey(xPrivKey)).derive('m/1/0').privateKey;
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var sharedEncryptingKey = Bitcore.crypto.Hash.sha256(walletPrivKey.toBuffer()).slice(0, 16).toString('base64');
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var copayerId = WalletUtils.xPubToCopayerId(xPubKey);
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var data = {
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copayerId: copayerId,
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xPrivKey: xPrivKey.toString(),
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publicKeyRing: [xPubKey],
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network: network,
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m: m,
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n: n,
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signingPrivKey: signingPrivKey.toWIF(),
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walletPrivKey: walletPrivKey.toWIF(),
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sharedEncryptingKey: sharedEncryptingKey,
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};
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return data;
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};
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API.prototype._doJoinWallet = function(walletId, walletPrivKey, xPubKey, copayerName, cb) {
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var args = {
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walletId: walletId,
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name: copayerName,
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xPubKey: xPubKey,
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xPubKeySignature: WalletUtils.signMessage(xPubKey, walletPrivKey),
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};
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var url = '/v1/wallets/' + walletId + '/copayers';
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this._doPostRequest(url, args, {}, function(err, body) {
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if (err) return cb(err);
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return cb(null, body.wallet);
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});
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};
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API.prototype.createWallet = function(walletName, copayerName, m, n, network, cb) {
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var self = this;
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network = network || 'livenet';
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if (!_.contains(['testnet', 'livenet'], network))
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return cb('Invalid network');
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this.storage.load(function(err, data) {
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if (data)
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return cb('Storage already contains a wallet');
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var walletPrivKey = new Bitcore.PrivateKey();
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var args = {
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name: walletName,
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m: m,
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n: n,
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pubKey: walletPrivKey.toPublicKey().toString(),
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network: network,
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};
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var url = '/v1/wallets/';
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self._doPostRequest(url, args, {}, function(err, body) {
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if (err) return cb(err);
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var walletId = body.walletId;
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var secret = WalletUtils.toSecret(walletId, walletPrivKey, network);
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var data = self._initData(network, walletPrivKey, m, n);
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self._doJoinWallet(walletId, walletPrivKey, data.publicKeyRing[0], copayerName,
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function(err, wallet) {
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if (err) return cb(err);
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self.storage.save(data, function(err) {
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return cb(err, n > 1 ? secret : null);
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});
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});
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});
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});
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};
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API.prototype.reCreateWallet = function(walletName, cb) {
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var self = this;
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this._loadAndCheck(function(err, data) {
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if (err) return cb(err);
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var walletPrivKey = new Bitcore.PrivateKey();
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var args = {
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name: walletName,
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m: data.m,
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n: data.n,
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pubKey: walletPrivKey.toPublicKey().toString(),
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network: data.network,
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};
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var url = '/v1/wallets/';
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self._doPostRequest(url, args, {}, function(err, body) {
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if (err) return cb(err);
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var walletId = body.walletId;
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var secret = WalletUtils.toSecret(walletId, walletPrivKey, data.network);
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var i = 0;
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async.each(data.publicKeyRing, function(xpub, next) {
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var copayerName = 'recovered Copayer #' + i;
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self._doJoinWallet(walletId, walletPrivKey, data.publicKeyRing[i++], copayerName, next);
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}, function(err) {
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return cb(err);
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});
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});
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});
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};
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API.prototype.joinWallet = function(secret, copayerName, cb) {
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var self = this;
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this.storage.load(function(err, data) {
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if (data)
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return cb('Storage already contains a wallet');
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var secretData = WalletUtils.fromSecret(secret);
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var data = self._initData(secretData.network, secretData.walletPrivKey);
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self._doJoinWallet(secretData.walletId, secretData.walletPrivKey, data.publicKeyRing[0], copayerName,
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function(err, wallet) {
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if (err) return cb(err);
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data.m = wallet.m;
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data.n = wallet.n;
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self.storage.save(data, cb);
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});
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});
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};
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API.prototype.getStatus = function(cb) {
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var self = this;
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this._load(function(err, data) {
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if (err) return cb(err);
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var url = '/v1/wallets/';
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self._doGetRequest(url, data, function(err, body) {
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_.each(body.pendingTxps, function(txp) {
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txp.message = _decryptProposalMessage(txp.message, data.sharedEncryptingKey);
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});
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return cb(err, body, data.copayerId);
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});
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});
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};
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/**
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* send
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*
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* @param opts
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* @param opts.toAddress
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* @param opts.amount
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* @param opts.message
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*/
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API.prototype.sendTxProposal = function(opts, cb) {
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var self = this;
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this._loadAndCheck(function(err, data) {
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if (err) return cb(err);
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var amount;
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try {
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amount = WalletUtils.parseAmount(opts.amount);
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} catch (ex) {
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return cb(ex);
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}
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var args = {
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toAddress: opts.toAddress,
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amount: amount,
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message: _encryptProposalMessage(opts.message, data.sharedEncryptingKey),
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};
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var hash = WalletUtils.getProposalHash(args.toAddress, args.amount, args.message);
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args.proposalSignature = WalletUtils.signMessage(hash, data.signingPrivKey);
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var url = '/v1/txproposals/';
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self._doPostRequest(url, args, data, cb);
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});
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};
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API.prototype.createAddress = function(cb) {
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var self = this;
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this._loadAndCheck(function(err, data) {
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if (err) return cb(err);
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var url = '/v1/addresses/';
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self._doPostRequest(url, {}, data, function(err, address) {
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if (err) return cb(err);
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if (!Verifier.checkAddress(data, address)) {
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return cb(new ServerCompromisedError('Server sent fake address'));
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}
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return cb(null, address);
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});
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});
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};
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API.prototype.history = function(limit, cb) {
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};
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API.prototype.getBalance = function(cb) {
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var self = this;
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this._loadAndCheck(function(err, data) {
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if (err) return cb(err);
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var url = '/v1/balance/';
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self._doGetRequest(url, data, cb);
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});
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};
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API.prototype.export = function(cb) {
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var self = this;
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this._loadAndCheck(function(err, data) {
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if (err) return cb(err);
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var v = [];
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var myXPubKey = (new Bitcore.HDPublicKey(data.xPrivKey)).toString();
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_.each(WALLET_CRITICAL_DATA, function(k) {
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var d;
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if (k === 'publicKeyRing') {
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d = _.without(data[k], myXPubKey);
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} else {
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d = data[k];
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}
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v.push(d);
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});
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return cb(null, JSON.stringify(v));
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});
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}
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API.prototype.import = function(str, cb) {
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var self = this;
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this.storage.load(function(err, data) {
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if (data)
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return cb('Storage already contains a wallet');
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data = {};
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var inData = JSON.parse(str);
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var i = 0;
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_.each(WALLET_CRITICAL_DATA, function(k) {
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data[k] = inData[i++];
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if (!data[k])
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return cb('Invalid wallet data');
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});
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var xPubKey = (new Bitcore.HDPublicKey(data.xPrivKey)).toString();
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data.publicKeyRing.push(xPubKey);
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data.copayerId = WalletUtils.xPubToCopayerId(xPubKey);
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data.n = data.publicKeyRing.length;
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data.signingPrivKey = (new Bitcore.HDPrivateKey(data.xPrivKey)).derive('m/1/0').privateKey.toWIF();
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data.network = data.xPrivKey.substr(0, 4) === 'tprv' ? 'testnet' : 'livenet';
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self.storage.save(data, cb);
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});
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};
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API.prototype.getTxProposals = function(opts, cb) {
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var self = this;
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this._loadAndCheck(function(err, data) {
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if (err) return cb(err);
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var url = '/v1/txproposals/';
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self._doGetRequest(url, data, function(err, txps) {
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if (err) return cb(err);
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_.each(txps, function(txp) {
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txp.message = _decryptProposalMessage(txp.message, data.sharedEncryptingKey);
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});
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return cb(null, txps);
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});
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});
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};
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API.prototype.signTxProposal = function(txp, cb) {
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var self = this;
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this._loadAndCheck(function(err, data) {
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if (err) return cb(err);
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if (!Verifier.checkTxProposal(data, txp)) {
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return cb(new ServerCompromisedError('Server sent fake transaction proposal'));
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}
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//Derive proper key to sign, for each input
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var privs = [],
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derived = {};
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var network = new Bitcore.Address(txp.toAddress).network.name;
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var xpriv = new Bitcore.HDPrivateKey(data.xPrivKey, network);
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_.each(txp.inputs, function(i) {
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if (!derived[i.path]) {
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derived[i.path] = xpriv.derive(i.path).privateKey;
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}
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privs.push(derived[i.path]);
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});
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var t = new Bitcore.Transaction();
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_.each(txp.inputs, function(i) {
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t.from(i, i.publicKeys, txp.requiredSignatures);
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});
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t.to(txp.toAddress, txp.amount)
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.change(txp.changeAddress)
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.sign(privs);
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var signatures = [];
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_.each(privs, function(p) {
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var s = t.getSignatures(p)[0].signature.toDER().toString('hex');
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signatures.push(s);
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});
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var url = '/v1/txproposals/' + txp.id + '/signatures/';
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var args = {
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signatures: signatures
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};
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self._doPostRequest(url, args, data, cb);
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});
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};
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API.prototype.rejectTxProposal = function(txp, reason, cb) {
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var self = this;
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this._loadAndCheck(
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function(err, data) {
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if (err) return cb(err);
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var url = '/v1/txproposals/' + txp.id + '/rejections/';
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var args = {
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reason: reason || '',
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};
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self._doPostRequest(url, args, data, cb);
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});
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};
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API.prototype.broadcastTxProposal = function(txp, cb) {
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var self = this;
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this._loadAndCheck(
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function(err, data) {
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if (err) return cb(err);
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var url = '/v1/txproposals/' + txp.id + '/broadcast/';
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self._doPostRequest(url, {}, data, cb);
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});
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};
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API.prototype.removeTxProposal = function(txp, cb) {
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var self = this;
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this._loadAndCheck(
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function(err, data) {
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if (err) return cb(err);
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var url = '/v1/txproposals/' + txp.id;
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self._doRequest('delete', url, {}, data, cb);
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});
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};
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module.exports = API;
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