847 lines
20 KiB
JavaScript
847 lines
20 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 flocore = require('flocore-lib');
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var Unit = flocore.Unit;
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var _ = flocore.deps._;
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var lodash = require('lodash');
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var Encoding = require('./encoding');
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var Transform = require('stream').Transform;
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var assert = require('assert');
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var utils = require('../../utils');
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var LRU = require('lru-cache');
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var XXHash = require('xxhash');
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// See rationale about this cache at function getTxList(next)
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const TXID_LIST_CACHE_ITEMS = 250; // nr of items (this translates to: consecutive
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// clients downloading their tx history)
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const TXID_LIST_CACHE_EXPIRATION = 1000 * 30; // ms
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const TXID_LIST_CACHE_MIN = 100; // Min items to cache
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const TXID_LIST_CACHE_SEED = 0x3233DE; // Min items to cache
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var AddressService = function(options) {
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BaseService.call(this, options);
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this._header = this.node.services.header;
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this._block = this.node.services.block;
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this._timestamp = this.node.services.timestamp;
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this._transaction = this.node.services.transaction;
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this._network = this.node.network;
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this._db = this.node.services.db;
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this._mempool = this.node.services.mempool;
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this._txIdListCache = new LRU({
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max: TXID_LIST_CACHE_ITEMS,
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maxAge: TXID_LIST_CACHE_EXPIRATION
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});
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if (this._network === 'livenet') {
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this._network = 'main';
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}
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if (this._network === 'regtest') {
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this._network = 'testnet';
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}
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};
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inherits(AddressService, BaseService);
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AddressService.dependencies = [
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'db',
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'block',
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'header',
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'transaction',
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'timestamp',
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'mempool'
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];
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// this must return the to-from number of txs for ALL passed in addresses sort from latest txs to earliest
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// for example if the query /api/addrs/txs?from=0&to=5&noAsm=1&noScriptSig=1&noSpent=1, and the addresses passed
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// in are [addr1, addr2, addr3], then if addr3 has tx1 at height 10, addr2 has tx2 at height 9 and tx1 has no txs,
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// then I would pass back [tx1, tx2] in that order
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//
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// Instead of passing addresses, with from>0, options.cacheKey can be used to define the address set.
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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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var cacheUsed = false;
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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.txIdList = [];
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if (_.isUndefined(options.queryMempool)) {
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options.queryMempool = true;
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}
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if (_.isString(addresses)) {
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addresses = [addresses];
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}
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function getTxList(next) {
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function hashAddresses(addresses) {
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// Given there are only TXID_LIST_CACHE_ITEMS ~ 250 items cached at the sametime
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// a 32 bits hash is secure enough
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return XXHash.hash(Buffer.from(addresses.join('')), TXID_LIST_CACHE_SEED);
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};
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var calculatedCacheKey;
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// We use the cache ONLY on from > 0 queries.
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//
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// Rationale: The a full history is downloaded, the client do
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// from =0, to=x
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// then from =x+1 to=y
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// then [...]
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// The objective of this cache is to speed up the from>0 queries, and also
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// "freeze" the txid list during download.
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//
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if (options.from >0 ) {
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let cacheKey = options.cacheKey;
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if (!cacheKey) {
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calculatedCacheKey = hashAddresses(addresses);
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cacheKey = calculatedCacheKey;
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}
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var txIdList = self._txIdListCache.get(cacheKey);
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if (txIdList) {
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options.txIdList = txIdList;
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cacheUsed = true;
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return next();
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}
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}
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// Get the list from the db
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async.eachLimit(addresses, 4, function(address, next) {
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self._getAddressTxidHistory(address, options, next);
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}, function(err) {
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if (err) return next(err);
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var list = lodash.uniqBy(options.txIdList, function(x) {
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return x.txid + x.height;
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});
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options.txIdList = lodash.orderBy(list,['height','txid'], ['desc','asc']);
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if (list.length > TXID_LIST_CACHE_MIN) {
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calculatedCacheKey = calculatedCacheKey || hashAddresses(addresses);
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self._txIdListCache.set(calculatedCacheKey, options.txIdList);
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}
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return next();
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});
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};
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getTxList(function(err) {
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if(err) {
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return callback(err);
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}
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self._getAddressTxHistory(options, function(err, txList) {
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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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totalCount: options.txIdList.length || 0,
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items: txList,
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};
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// cacheUsed is returned for testing
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callback(null, results, cacheUsed);
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});
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});
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};
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// this is basically the same as _getAddressHistory apart from the summary
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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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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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};
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self.getAddressHistory(address, options, function(err, results) {
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if (err) {
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return callback(err);
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}
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var txs = results.items;
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self._getAddressSummaryResult(txs, address, result, options);
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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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};
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AddressService.prototype._setOutputResults = function(tx, address, result) {
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for(var j = 0; j < tx.outputs.length; j++) {
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var output = tx.outputs[j];
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if (utils.getAddress(output, this._network) !== address) {
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continue;
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}
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result.txApperances++;
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result.totalReceivedSat += output.value;
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result.balanceSat += output.value;
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if (tx.confirmations === 0) {
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result.unconfirmedTxApperances++;
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result.unconfirmedBalanceSat += output.value;
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}
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}
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return result;
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};
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AddressService.prototype._setInputResults = function(tx, address, result) {
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for(var i = 0; i < tx.inputs.length; i++) {
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var input = tx.inputs[i];
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if (utils.getAddress(input, this._network) !== address) {
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continue;
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}
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result.totalSentSat += tx.__inputValues[i];
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result.balanceSat -= tx.__inputValues[i];
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if (tx.confirmations === 0) {
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result.unconfirmedBalanceSat -= tx.__inputValues[i];
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}
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}
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};
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AddressService.prototype._getAddressSummaryResult = function(txs, address, result, options) {
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var self = this;
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for(var i = 0; i < txs.length; i++) {
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var tx = txs[i];
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self._setOutputResults(tx, address, result);
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self._setInputResults(tx, address, result);
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if (!options.noTxList) {
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if (!result.transactions) {
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result.transactions = [];
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}
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result.transactions.push(tx.txid());
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}
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}
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return result;
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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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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 final = new Buffer(new Array(73).join('f'), 'hex');
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var end = Buffer.concat([ start.slice(0, -36), final ]);
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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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async.waterfall([
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// query the mempool if necessary
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function(next) {
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if (!options.queryMempool) {
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return next(null, []);
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}
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self._mempool.getTxidsByAddress(address, 'output', next);
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},
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// if mempool utxos, then add them first
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function(mempoolTxids, next) {
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if (mempoolTxids.length <= 0) {
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return next();
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}
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async.eachLimit(mempoolTxids, 4, function(id, next) {
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self._mempool.getMempoolTransaction(id.txid, function(err, tx) {
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if (err || !tx) {
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return next(err || new Error('Address Service: missing tx: ' + id.txid));
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}
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results = results.concat(self._getMempoolUtxos(tx, address));
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next();
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});
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});
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next();
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},
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function(next) {
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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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results = utils.orderByConfirmations(results);
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next(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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height: value.height,
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satoshis: value.satoshis,
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confirmations: self._block.getTip().height - value.height + 1
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});
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});
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}
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], callback);
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};
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AddressService.prototype._getMempoolUtxos = function(tx, address) {
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var results = [];
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for(var i = 0; i < tx.outputs.length; i++) {
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var output = tx.outputs[i];
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if (utils.getAddress(output, this._network) !== address) {
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continue;
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}
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results.push({
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address: address,
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txid: tx.txid(),
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vout: i,
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scriptPubKey: output.script.toRaw().toString('hex'),
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amount: Unit.fromSatoshis(output.value).toBTC(),
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height: null,
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satoshis: output.value,
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confirmations: 0
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});
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}
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return results;
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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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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._getTxidStream = function(address, options) {
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var start = this._encoding.encodeAddressIndexKey(address);
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var end = Buffer.concat([
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start.slice(0, address.length + 4),
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options.endHeightBuf,
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new Buffer(new Array(83).join('f'), 'hex')
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]);
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var criteria = {
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gte: start,
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lte: end,
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reverse: true // txids stream from low confirmations to high confirmations
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};
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// txid stream
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var txidStream = this._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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return txidStream;
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};
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AddressService.prototype._getAddressTxHistory = function(options, callback) {
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var self = this;
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// slice the txids based on pagination needs
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var ids = options.txIdList.slice(options.from, options.to);
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// go and get the actual txs
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async.mapLimit(ids, 4, function(id, next) {
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if (id.height === 0xffffffff) {
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return self._mempool.getMempoolTransaction(id.txid, function(err, tx) {
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if (err || !tx) {
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return next(err || new Error('Address Service: could not find tx: ' + id.txid));
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}
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self._transaction.setTxMetaInfo(tx, options, next);
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});
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}
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self._transaction.getDetailedTransaction(id.txid, options, next);
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}, callback);
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};
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AddressService.prototype._getAddressTxidHistory = function(address, options, callback) {
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var self = this;
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options = options || {};
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options.start = options.start || 0;
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options.end = options.end || 0xffffffff;
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var results = [];
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options.endHeightBuf = new Buffer(4);
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options.endHeightBuf.writeUInt32BE(options.end);
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if (_.isUndefined(options.queryMempool)) {
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options.queryMempool = true;
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}
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async.waterfall([
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// query the mempool for relevant txs for this address
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function(next) {
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if (!options.queryMempool) {
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return next(null, []);
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}
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self._mempool.getTxidsByAddress(address, 'both', next);
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},
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// add the meta data such as input values, etc.
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function(mempoolTxids, next) {
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if (mempoolTxids.length <= 0) {
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return next();
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}
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results = mempoolTxids;
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next();
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},
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// stream the rest of the confirmed txids out of the address index
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function(next) {
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var txIdTransformStream = new Transform({ objectMode: true });
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txIdTransformStream._flush = function(callback) {
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txIdTransformStream.emit('end');
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callback();
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};
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txIdTransformStream.on('error', function(err) {
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log.error('Address Service: txstream err: ' + err);
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txIdTransformStream.unpipe();
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});
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txIdTransformStream.on('end', function() {
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options.txIdList = options.txIdList.concat(results);
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next();
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});
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txIdTransformStream._transform = function(chunk, enc, callback) {
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var txInfo = self._encoding.decodeAddressIndexKey(chunk);
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results.push({ txid: txInfo.txid, height: txInfo.height });
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callback();
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};
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var txidStream = self._getTxidStream(address, options);
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txidStream.pipe(txIdTransformStream);
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}
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], callback);
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};
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AddressService.prototype._removeBlock = function(block, callback) {
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var self = this;
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async.mapSeries(block.txs, function(tx, next) {
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self._removeTx(tx, block, next);
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}, callback);
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};
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AddressService.prototype._removeTx = function(tx, block, callback) {
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var self = this;
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var operations = [];
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async.parallelLimit([
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function(next) {
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async.eachOfSeries(tx.inputs, function(input, indext, next) {
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self._removeInput(input, tx, block, index, function(err, ops) {
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if(err) {
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return next(err);
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}
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operations = operations.concat(ops);
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next();
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});
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}, next);
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},
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function(next) {
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async.eachOfSeries(tx.outputs, function(output, index, next) {
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self._removeOutput(output, tx, block, index, function(err, ops) {
|
|
if(err) {
|
|
return next(err);
|
|
}
|
|
operations = operations.concat(ops);
|
|
next();
|
|
});
|
|
}, next);
|
|
}
|
|
|
|
], 4, function(err) {
|
|
|
|
if(err) {
|
|
return callback(err);
|
|
}
|
|
|
|
callback(null, operations);
|
|
|
|
});
|
|
|
|
};
|
|
|
|
AddressService.prototype._removeInput = function(input, tx, block, index, callback) {
|
|
|
|
var self = this;
|
|
var address = input.getAddress();
|
|
|
|
var removalOps = [];
|
|
|
|
if (!address) {
|
|
return callback();
|
|
}
|
|
|
|
address.network = self._network;
|
|
address = address.toString();
|
|
|
|
assert(block && block.__ts && block.__height, 'Missing block or block values.');
|
|
|
|
removalOps.push({
|
|
type: 'del',
|
|
key: self._encoding.encodeAddressIndexKey(address, block.__height, tx.txid(), index, 1, block.__ts)
|
|
});
|
|
|
|
// look up prev output of this input and put it back in the set of utxos
|
|
self._transaction.getTransaction(input.prevout.txid(), function(err, _tx) {
|
|
|
|
if (err) {
|
|
return callback(err);
|
|
}
|
|
|
|
assert(_tx, 'Missing prev tx to insert back into the utxo set when reorging address index.');
|
|
assert(_tx.__height && _tx.__inputValues && _tx.__timestamp, 'Missing tx values.');
|
|
|
|
removalOps.push({
|
|
type: 'put',
|
|
key: self._encoding.encodeUtxoIndexKey(address, _tx.txid(), input.prevout.index),
|
|
value: self._encoding.encodeUtxoIndexValue(
|
|
_tx.__height,
|
|
_tx.__inputValues[input.prevout.index],
|
|
_tx.__timestamp, _tx.outputs[input.prevout.index].script.toRaw())
|
|
});
|
|
|
|
callback(null, removalOps);
|
|
|
|
});
|
|
};
|
|
|
|
AddressService.prototype._removeOutput = function(output, tx, block, index, callback) {
|
|
|
|
var self = this;
|
|
var address = output.getAddress();
|
|
var removalOps = [];
|
|
|
|
if (!address) {
|
|
return callback();
|
|
}
|
|
|
|
address.network = self._network;
|
|
address = address.toString();
|
|
|
|
assert(block && block.__ts && block.__height, 'Missing block or block values.');
|
|
|
|
removalOps.push({
|
|
type: 'del',
|
|
key: self._encoding.encodeAddressIndexKey(address, block.__height, tx.txid(), index, 0, block.__ts)
|
|
});
|
|
|
|
//remove the utxo for this output from the collection
|
|
removalOps.push({
|
|
type: 'del',
|
|
key: self._encoding.encodeUtxoIndexKey(address, tx.txid(), index)
|
|
});
|
|
|
|
setImmediate(function() {
|
|
callback(null, removalOps);
|
|
});
|
|
};
|
|
|
|
AddressService.prototype.onReorg = function(args, callback) {
|
|
|
|
var self = this;
|
|
|
|
var oldBlockList = args[1];
|
|
|
|
// for every tx, remove the address index key for every input and output
|
|
// for every input record, we need to find its previous output and put it back into the utxo collection
|
|
async.mapSeries(oldBlockList, self._removeBlock.bind(self), function(err, ops) {
|
|
|
|
if (err) {
|
|
return callback(err);
|
|
}
|
|
|
|
var operations = lodash.compact(lodash.flattenDeep(ops));
|
|
callback(null, operations);
|
|
});
|
|
|
|
};
|
|
|
|
AddressService.prototype.onBlock = function(block, callback) {
|
|
var self = this;
|
|
|
|
if (self.node.stopping) {
|
|
return callback();
|
|
}
|
|
|
|
var operations = [];
|
|
|
|
for(var i = 0; i < block.txs.length; i++) {
|
|
var tx = block.txs[i];
|
|
var ops = self._processTransaction(tx, { block: block });
|
|
operations.push(ops);
|
|
}
|
|
|
|
operations = lodash.flattenDeep(operations);
|
|
|
|
callback(null, operations);
|
|
};
|
|
|
|
AddressService.prototype._processInput = function(tx, input, index, opts) {
|
|
|
|
var address = input.getAddress();
|
|
|
|
if(!address) {
|
|
return;
|
|
}
|
|
|
|
address.network = this._network;
|
|
address = address.toString();
|
|
|
|
var txid = tx.txid();
|
|
var timestamp = this._timestamp.getTimestampSync(opts.block.rhash());
|
|
|
|
assert(timestamp, 'Must have a timestamp in order to process input.');
|
|
|
|
// address index
|
|
var addressKey = this._encoding.encodeAddressIndexKey(address, opts.block.__height, txid, index, 1, timestamp);
|
|
|
|
var operations = [{
|
|
type: 'put',
|
|
key: addressKey
|
|
}];
|
|
|
|
// prev utxo
|
|
var rec = {
|
|
type: 'del',
|
|
key: this._encoding.encodeUtxoIndexKey(address, input.prevout.txid(), input.prevout.index)
|
|
};
|
|
|
|
operations.push(rec);
|
|
|
|
return operations;
|
|
};
|
|
|
|
AddressService.prototype._processOutput = function(tx, output, index, opts) {
|
|
|
|
// TODO: if the output is pay to public key, we are reporting this as p2pkh
|
|
// this leads to the spending tx not being properly indexed. Txs that
|
|
// spend p2pk outputs, will not have the public key as part of their input script sig
|
|
var address = output.getAddress();
|
|
|
|
if(!address) {
|
|
return;
|
|
}
|
|
|
|
address.network = this._network;
|
|
address = address.toString();
|
|
|
|
var txid = tx.txid();
|
|
var timestamp = this._timestamp.getTimestampSync(opts.block.rhash());
|
|
|
|
assert(timestamp, 'Must have a timestamp in order to process output.');
|
|
|
|
var addressKey = this._encoding.encodeAddressIndexKey(address, opts.block.__height, txid, index, 0, timestamp);
|
|
|
|
var utxoKey = this._encoding.encodeUtxoIndexKey(address, txid, index);
|
|
var utxoValue = this._encoding.encodeUtxoIndexValue(
|
|
opts.block.__height,
|
|
output.value,
|
|
timestamp,
|
|
output.script.toRaw()
|
|
);
|
|
|
|
var operations = [{
|
|
type: 'put',
|
|
key: addressKey
|
|
}];
|
|
|
|
operations.push({
|
|
type: 'put',
|
|
key: utxoKey,
|
|
value: utxoValue
|
|
});
|
|
|
|
return operations;
|
|
|
|
};
|
|
|
|
AddressService.prototype._processTransaction = function(tx, opts) {
|
|
|
|
var self = this;
|
|
|
|
var _opts = { block: opts.block };
|
|
|
|
var outputOperations = tx.outputs.map(function(output, index) {
|
|
return self._processOutput(tx, output, index, _opts);
|
|
});
|
|
|
|
outputOperations = lodash.compact(lodash.flattenDeep(outputOperations));
|
|
assert(outputOperations.length % 2 === 0 &&
|
|
outputOperations.length <= tx.outputs.length * 2,
|
|
'Output operations count is not reflective of what should be possible.');
|
|
|
|
var inputOperations = tx.inputs.map(function(input, index) {
|
|
return self._processInput(tx, input, index, _opts);
|
|
});
|
|
|
|
inputOperations = lodash.compact(lodash.flattenDeep(inputOperations));
|
|
|
|
assert(inputOperations.length % 2 === 0 &&
|
|
inputOperations.length <= tx.inputs.length * 2,
|
|
'Input operations count is not reflective of what should be possible.');
|
|
|
|
outputOperations = outputOperations.concat(inputOperations);
|
|
return outputOperations;
|
|
|
|
};
|
|
|
|
module.exports = AddressService;
|