507 lines
12 KiB
JavaScript
507 lines
12 KiB
JavaScript
'use strict';
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var BaseService = require('../../service');
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var inherits = require('util').inherits;
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var async = require('async');
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var index = require('../../');
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var log = index.log;
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var bitcore = require('bitcore-lib');
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var Unit = bitcore.Unit;
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var _ = bitcore.deps._;
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var Encoding = require('./encoding');
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var utils = require('../../utils');
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var Transform = require('stream').Transform;
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var AddressService = function(options) {
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BaseService.call(this, options);
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this._db = this.node.services.db;
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this._tx = this.node.services.transaction;
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this._network = this.node.getNetworkName();
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this._p2p = this.node.services.p2p;
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};
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inherits(AddressService, BaseService);
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AddressService.dependencies = [
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'p2p',
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'db',
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'block',
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'transaction'
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];
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// ---- public function prototypes
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AddressService.prototype.getAddressHistory = function(addresses, options, callback) {
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var self = this;
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options = options || {};
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options.from = options.from || 0;
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options.to = options.to || 0xffffffff;
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options.queryMempool = _.isUndefined(options.queryMempool) ? true : false;
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async.mapLimit(addresses, 4, function(address, next) {
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self._getAddressHistory(address, options, next);
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}, function(err, res) {
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if(err) {
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return callback(err);
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}
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var results = {
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totalItems: res.length,
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from: options.from,
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to: options.to,
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items: res
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};
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callback(null, results);
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});
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};
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AddressService.prototype.getAddressSummary = function(address, options, callback) {
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var self = this;
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options = options || {};
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options.from = options.from || 0;
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options.to = options.to || 0xffffffff;
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options.queryMempool = _.isUndefined(options.queryMempool) ? true : false;
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var result = {
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addrStr: address,
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balance: 0,
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balanceSat: 0,
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totalReceived: 0,
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totalReceivedSat: 0,
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totalSent: 0,
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totalSentSat: 0,
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unconfirmedBalance: 0,
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unconfirmedBalanceSat: 0,
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unconfirmedTxApperances: 0,
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txApperances: 0,
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transactions: []
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};
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// txid criteria
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var start = self._encoding.encodeAddressIndexKey(address, options.from);
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var end = self._encoding.encodeAddressIndexKey(address, options.to);
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var criteria = {
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gte: start,
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lt: end
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};
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// txid stream
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var txidStream = self._db.createKeyStream(criteria);
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txidStream.on('close', function() {
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txidStream.unpipe();
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});
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// tx stream
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var txStream = new Transform({ objectMode: true, highWaterMark: 1000 });
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txStream.on('end', function() {
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result.balance = Unit.fromSatoshis(result.balanceSat).toBTC();
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result.totalReceived = Unit.fromSatoshis(result.totalReceivedSat).toBTC();
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result.totalSent = Unit.fromSatoshis(result.totalSentSat).toBTC();
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result.unconfirmedBalance = Unit.fromSatoshis(result.unconfirmedBalanceSat).toBTC();
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callback(null, result);
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});
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// pipe txids into tx stream for processing
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txidStream.pipe(txStream);
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txStream._transform = function(chunk, enc, callback) {
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var key = self._encoding.decodeAddressIndexKey(chunk);
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self._tx.getTransaction(key.txid, options, function(err, tx) {
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if(err) {
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log.error(err);
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txStream.emit('error', err);
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return callback();
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}
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if (!tx) {
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log.error('Could not find tx for txid: ' + key.txid + '. This should not be possible, check indexes.');
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return callback();
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}
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var confirmations = self._p2p.getBestHeight() - key.height;
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result.transactions.push(tx.txid());
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result.txApperances++;
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if (key.input) {
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result.balanceSat -= tx.__inputValues[key.index];
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result.totalSentSat += tx.__inputValues[key.index];
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if (confirmations < 1) {
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result.unconfirmedBalanceSat -= tx.__inputValues[key.index];
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result.unconfirmedTxApperances++;
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}
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} else {
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result.balanceSat += tx.outputs[key.index].value;
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result.totalReceivedSat += tx.outputs[key.index].value;
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if (confirmations < 1) {
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result.unconfirmedBalanceSat += tx.inputValues[key.index];
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result.unconfirmedTxApperances++;
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}
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}
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callback();
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});
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};
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txStream.on('error', function(err) {
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log.error(err);
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txStream.unpipe();
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});
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txStream._flush = function(callback) {
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txStream.emit('end');
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callback();
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};
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};
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AddressService.prototype.getAddressUnspentOutputs = function(address, options, callback) {
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var self = this;
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options = options || {};
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options.from = options.from || 0;
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options.to = options.to || 0xffffffff;
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options.queryMempool = _.isUndefined(options.queryMempool) ? true : false;
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var results = [];
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var start = self._encoding.encodeUtxoIndexKey(address);
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var criteria = {
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gte: start,
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lt: utils.getTerminalKey(start)
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};
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var utxoStream = self._db.createReadStream(criteria);
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var streamErr;
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utxoStream.on('end', function() {
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if (streamErr) {
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return callback(streamErr);
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}
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callback(null, results);
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});
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utxoStream.on('error', function(err) {
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streamErr = err;
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});
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utxoStream.on('data', function(data) {
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var key = self._encoding.decodeUtxoIndexKey(data.key);
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var value = self._encoding.decodeUtxoIndexValue(data.value);
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results.push({
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address: address,
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txid: key.txid,
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vout: key.outputIndex,
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ts: value.timestamp,
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scriptPubKey: value.script.toString('hex'),
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amount: Unit.fromSatoshis(value.satoshis).toBTC(),
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confirmations: self._p2p.getBestHeight() - value.height,
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satoshis: value.satoshis,
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confirmationsFromCache: true
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});
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});
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};
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AddressService.prototype.getAPIMethods = function() {
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return [
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['getAddressHistory', this, this.getAddressHistory, 2],
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['getAddressSummary', this, this.getAddressSummary, 1],
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['getAddressUnspentOutputs', this, this.getAddressUnspentOutputs, 1]
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];
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};
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AddressService.prototype.start = function(callback) {
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var self = this;
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this._db.getPrefix(this.name, function(err, prefix) {
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if(err) {
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return callback(err);
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}
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self._encoding = new Encoding(prefix);
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self._startSubscriptions();
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callback();
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});
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};
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AddressService.prototype.stop = function(callback) {
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setImmediate(callback);
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};
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// ---- start private function prototypes
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AddressService.prototype._getAddressHistory = function(address, options, callback) {
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var self = this;
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options = options || {};
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var from = options.from || 0;
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var to = options.to || 0xffffffff;
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if (_.isUndefined(options.queryMempool)) {
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options.queryMempool = true;
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}
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var results = [];
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var start = self._encoding.encodeAddressIndexKey(address, options.start);
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var end = self._encoding.encodeAddressIndexKey(address, options.end);
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var criteria = {
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gte: start,
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lte: end
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};
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// txid stream
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var txidStream = self._db.createKeyStream(criteria);
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txidStream.on('close', function() {
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txidStream.unpipe();
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});
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// tx stream
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var txStream = new Transform({ objectMode: true, highWaterMark: 1000 });
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var streamErr;
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txStream.on('end', function() {
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if (streamErr) {
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return callback(streamErr);
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}
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callback(null, results);
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});
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// pipe txids into tx stream for processing
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txidStream.pipe(txStream);
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txStream._transform = function(chunk, enc, callback) {
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var key = self._encoding.decodeAddressIndexKey(chunk);
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self._tx.getTransaction(key.txid, options, function(err, tx) {
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if(err) {
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log.error(err);
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txStream.emit('error', err);
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return callback();
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}
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if (!tx) {
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log.error('Could not find tx for txid: ' + key.txid + '. This should not be possible, check indexes.');
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return callback();
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}
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results.push(tx);
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callback();
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});
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};
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txStream.on('error', function(err) {
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log.error(err);
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txStream.unpipe();
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});
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txStream._flush = function(callback) {
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txStream.emit('end');
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callback();
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};
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};
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AddressService.prototype._startSubscriptions = function() {
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if (this._subscribed) {
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return;
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}
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this._subscribed = true;
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if (!this._bus) {
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this._bus = this.node.openBus({remoteAddress: 'localhost'});
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}
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this._bus.on('block/reorg', this._onReorg.bind(this));
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this._bus.subscribe('block/reorg');
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};
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AddressService.prototype._onReorg = function(commonAncestorHeader, oldBlockList) {
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// if the common ancestor block height is greater than our own, then nothing to do for the reorg
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if (this._tip.height <= commonAncestorHeader.height) {
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return;
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}
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// set the tip to the common ancestor in case something goes wrong with the reorg
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var tipOps = utils.encodeTip({ hash: commonAncestorHeader.hash, height: commonAncestorHeader.height }, this.name);
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var removalOps = [{
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type: 'put',
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key: tipOps.key,
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value: tipOps.value
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}];
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// for every tx, remove the address index key for every input and output
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for(var i = 0; i < oldBlockList.length; i++) {
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var block = oldBlockList[i];
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//txs
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for(var j = 0; j < block.transactions.length; j++) {
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var tx = block.transactions[j];
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//inputs
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var address;
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for(var k = 0; k < tx.inputs.length; k++) {
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var input = tx.inputs[k];
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address = utils.getAddressString({ tx: tx, item: input, network: this._network });
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if (!address) {
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continue;
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}
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removalOps.push({
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type: 'del',
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key: this.encoding.encodeTransactionKey(address, block.height, tx.id, k, 1)
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});
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}
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//outputs
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for(k = 0; k < tx.outputs.length; k++) {
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var output = tx.outputs[k];
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address = utils.getAddressString({ tx: tx, item: output, network: this._network });
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if (!address) {
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continue;
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}
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removalOps.push({
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type: 'del',
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key: this.encoding.encodeTransactionKey(address, block.height, tx.id, k, 0)
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});
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}
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}
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}
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this._db.batch(removalOps);
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};
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AddressService.prototype.onBlock = function(block, callback) {
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var self = this;
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var operations = [];
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block.txs.forEach(function(tx) {
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operations.concat(self._processTransaction(tx, { block: block }));
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});
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if (operations && operations.length > 0) {
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self._db.batch(operations);
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}
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callback(null, operations);
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};
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AddressService.prototype._processInput = function(tx, input, opts) {
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var address = utils.getAddressString({ item: input });
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if(!address) {
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return;
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}
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var txid = tx.txid();
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// address index
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var addressKey = this._encoding.encodeAddressIndexKey(address, opts.block.height, txid);
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var operations = [{
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type: 'put',
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key: addressKey
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}];
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// prev utxo
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var rec = {
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type: 'del',
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key: this._encoding.encodeUtxoIndexKey(address, input.prevout.txid(), input.prevout.index)
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};
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// In the event where we are reorg'ing,
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// this is where we are putting a utxo back in, we don't know what the original height, sats, or scriptBuffer
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// since this only happens on reorg and the utxo that was spent in the chain we are reorg'ing away from will likely
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// be spent again sometime soon, we will not add the value back in, just the key
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operations.push(rec);
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return operations;
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};
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AddressService.prototype._processOutput = function(tx, output, index, opts) {
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var address = utils.getAddressString({ item: output });
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if(!address) {
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return;
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}
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var txid = tx.txid();
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var addressKey = this._encoding.encodeAddressIndexKey(address, opts.block.height, txid);
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var utxoKey = this._encoding.encodeUtxoIndexKey(address, txid, index);
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var utxoValue = this._encoding.encodeUtxoIndexValue(opts.block.height, Unit.fromBTC(output.value).toSatoshis(), output.script.toRaw());
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var operations = [{
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type: 'put',
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key: addressKey
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}];
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operations.push({
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type: 'put',
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key: utxoKey,
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value: utxoValue
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});
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};
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AddressService.prototype._processTransaction = function(tx, opts) {
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var self = this;
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var _opts = { block: opts.block };
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var outputOperations = tx.outputs.map(function(output, index) {
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return self._processOutput(tx, output, index, _opts);
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});
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outputOperations = _.flatten(_.compact(outputOperations));
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var inputOperations = tx.inputs.map(function(input) {
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self._processInput(tx, input, _opts);
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});
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inputOperations = _.flatten(_.compact(inputOperations));
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return outputOperations.concat(inputOperations);
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};
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module.exports = AddressService;
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