543 lines
12 KiB
JavaScript
543 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 errors = index.errors;
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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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/*
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1. getAddressSummary
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2. getAddressUnspentOutputs
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3. bitcoind.height
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4. getBlockHeader
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5. getDetailedTransaction
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6. getTransaction
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7. sendTransaction
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8. getInfo
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9. bitcoind.tiphash
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10. getBestBlockHash
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11. isSynced
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12. getAddressHistory
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13. getBlock
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14. getRawBlock
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15. getBlockHashesByTimestamp
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16. estimateFee
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17. getBlockOverview
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18. syncPercentage
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*/
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var AddressService = function(options) {
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BaseService.call(this, options);
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this._txService = this.node.services.transaction;
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this._network = this.node.getNetworkName();
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};
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inherits(AddressService, BaseService);
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AddressService.dependencies = [
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'bitcoind',
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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.getUtxos = function(addresses, queryMempool, callback) {
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var self = this;
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if(!Array.isArray(addresses)) {
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addresses = [addresses];
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}
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var utxos = [];
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async.eachSeries(addresses, function(address, next) {
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self.getUtxosForAddress(address, queryMempool, function(err, unspents) {
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if(err && err instanceof errors.NoOutputs) {
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return next();
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} else if(err) {
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return next(err);
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}
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utxos = utxos.concat(unspents);
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next();
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});
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}, function(err) {
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callback(err, utxos);
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});
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};
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AddressService.prototype.getUtxosForAddress = function(address, queryMempool, callback) {
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var self = this;
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var stream = self.db.createReadStream({
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gte: self._encoding.encodeUtxoIndexKey(address),
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lt: self._encoding.encodeUtxoIndexKey(utils.getTerminalKey(new Buffer(address)))
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});
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var utxos = [];
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stream.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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utxos.push({
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address: key.address,
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txid: key.txid,
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outputIndex: key.outputIndex,
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satoshis: value.satoshis,
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height: value.height,
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script: value.script
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});
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});
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stream.on('end', function() {
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return callback(null, utxos);
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});
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stream.on('error', function(err) {
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if(err) {
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return callback(err);
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}
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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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self._setListeners();
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this.db = this.node.services.db;
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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.prefix = prefix;
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self._encoding = new Encoding(self.prefix);
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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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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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['syncPercentage', this, this.syncPercentage, 0]
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];
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};
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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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var from = options.from || 0;
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var to = options.to || 0xffffffff;
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async.mapLimit(addresses, 4, function(address, next) {
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self._getAddressHistory(address, 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: from,
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to: 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._getAddressHistory = function(address, options, callback) {
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var self = this;
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var results = [];
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var start = self._encoding.encodeAddressIndexKey(address);
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var criteria = {
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gte: start,
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lte: utils.getTerminalKey(start)
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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.decodeWalletTransactionKey(chunk);
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self._tx.getDetailedTransaction(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.getAddressSummary = function(address, options, callback) {
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var self = this;
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if (_.isUndefined(options.queryMempool)) {
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options.queryMempool = true;
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}
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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);
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var criteria = {
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gte: start,
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lte: utils.getTerminalKey(start)
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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.decodeWalletTransactionKey(chunk);
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self._tx.getTransaction(key.txid, options, function(err, res) {
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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 (!res) {
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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 tx = res.tx;
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result.transactions.push(tx.id);
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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 (res.confirmations === 0) {
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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].satoshis;
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result.totalReceivedSat += tx.outputs[key.index].satoshis;
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if (res.confirmations === 0) {
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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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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.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._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.oudputIndex,
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ts: null,
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scriptPubKey: value.scriptBuffer.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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// ---- private function prototypes
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AddressService.prototype._setListeners = function() {
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var self = this;
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self._db.on('error', self._onDbError.bind(self));
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self.on('reorg', self._handleReorg.bind(self));
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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/block', this._onBlock.bind(this));
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this._bus.subscribe('block/block');
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};
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AddressService.prototype._onBlock = function(block) {
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var self = this;
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var operations = [];
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block.transactions.forEach(function(tx) {
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operations.concat(self._processTransaction(tx, { block: block, connect: connect }));
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});
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if (operations && operations.length > 0) {
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self._db.batch(operations, function(err) {
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if(err) {
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log.error('Address Service: Error saving block with hash: ' + block.hash);
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this._db.emit('error', err);
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return;
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}
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log.debug('Address Service: Success saving block hash ' + block.hash);
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});
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}
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};
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AddressService.prototype._processInput = function(opts, input) {
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var address = this._getAddress(opts, input);
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if (!address) {
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return;
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}
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// address index
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var addressKey = this._encoding.encodeAddressIndexKey(address, opts.block.height, opts.tx.id);
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var operations = [{
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type: opts.action,
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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: opts.action,
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key: this._encoding.encodeUtxoIndexKey(address, input.prevTxId.toString('hex'), input.outputIndex)
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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({ tx: tx, item: output, network: this._network });
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if(!address) {
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return;
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}
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var txid = tx.id;
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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, output.satoshis, output._scriptBuffer);
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var operations = [{
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type: opts.action,
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key: addressKey
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}];
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operations.push({
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type: opts.action,
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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(opts, tx) {
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var self = this;
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var action = 'put';
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var reverseAction = 'del';
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if (!opts.connect) {
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action = 'del';
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reverseAction = 'put';
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}
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var _opts = { block: opts.block, action: action, reverseAction: reverseAction };
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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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