996 lines
21 KiB
JavaScript
996 lines
21 KiB
JavaScript
/**
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* db.js - db object for bcoin
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* Copyright (c) 2014-2015, Fedor Indutny (MIT License)
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* https://github.com/indutny/bcoin
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*/
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var bcoin = require('../bcoin');
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var utils = bcoin.utils;
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var assert = utils.assert;
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var EventEmitter = require('events').EventEmitter;
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var network = bcoin.protocol.network;
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var DUMMY = new Buffer([]);
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var pad32 = utils.pad32;
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/**
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* BlockDB
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*/
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function BlockDB(options, db) {
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var self = this;
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if (!(this instanceof BlockDB))
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return new BlockDB(options);
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EventEmitter.call(this);
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if (!options)
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options = {};
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this.options = options;
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this.fsync = !!options.fsync;
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this.keepBlocks = options.keepBlocks || 288;
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this.prune = !!options.prune;
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this.db = db;
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}
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utils.inherits(BlockDB, EventEmitter);
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BlockDB.prototype.close = function close(callback) {
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var self = this;
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this.db.close(function(err) {
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if (err)
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return callback(err);
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return callback();
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});
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};
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BlockDB.prototype.saveBlock = function saveBlock(block, batch, callback) {
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var self = this;
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batch.put('b/b/' + block.hash('hex'), block.toCompact());
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block.txs.forEach(function(tx, i) {
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batch.put('t/t/' + tx.hash('hex'), tx.toExtended());
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});
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self.connectBlock(block, batch, callback);
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return;
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self.connectBlock(block, batch, function(err) {
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if (err)
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return callback(err);
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if (!self.prune)
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return callback(null, block);
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// Check for now-fully-spent txs. Try to remove
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// them or queue them up for future deletion if
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// it is currently unsafe to remove them.
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self._pruneBlock(block, batch, function(err) {
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if (err)
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return callback(err);
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return callback(null, block);
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});
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});
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};
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BlockDB.prototype.removeBlock = function removeBlock(hash, batch, callback) {
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var self = this;
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this._getTXBlock(hash, function(err, block) {
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if (err)
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return callback(err);
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if (!block)
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return callback();
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batch.del('b/b/' + block.hash('hex'));
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block.txs.forEach(function(tx, i) {
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batch.del('t/t/' + tx.hash('hex'));
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});
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self.disconnectBlock(block, batch, callback);
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});
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};
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BlockDB.prototype.connectBlock = function connectBlock(block, batch, callback) {
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var self = this;
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this._getCoinBlock(block, function(err, block) {
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var height;
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if (err)
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return callback(err);
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if (!block)
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return callback();
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block.txs.forEach(function(tx, i) {
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var hash = tx.hash('hex');
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var uniq = {};
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tx.inputs.forEach(function(input) {
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var address;
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if (input.isCoinbase())
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return;
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assert(input.output);
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if (self.options.indexAddress) {
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address = input.getAddress();
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if (address && !uniq[address]) {
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uniq[address] = true;
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batch.put('t/a/' + address + '/' + hash, DUMMY);
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}
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if (address) {
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batch.del(
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'u/a/' + address
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+ '/' + input.prevout.hash
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+ '/' + input.prevout.index);
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}
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}
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batch.del('u/t/' + input.prevout.hash + '/' + input.prevout.index);
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});
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tx.outputs.forEach(function(output, i) {
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var address;
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if (self.options.indexAddress) {
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address = output.getAddress();
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if (address && !uniq[address]) {
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uniq[address] = true;
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batch.put('t/a/' + address + '/' + hash, DUMMY);
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}
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if (address)
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batch.put('u/a/' + address + '/' + hash + '/' + i, DUMMY);
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}
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batch.put('u/t/' + hash + '/' + i, bcoin.coin(tx, i).toExtended());
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});
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});
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self.emit('add block', block);
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return callback(null, block);
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});
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};
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BlockDB.prototype.disconnectBlock = function disconnectBlock(hash, batch, callback) {
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var self = this;
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this._getTXBlock(hash, function(err, block) {
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if (err)
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return callback(err);
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if (!block)
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return callback();
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if (typeof hash === 'string')
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assert(block.hash('hex') === hash);
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block.txs.forEach(function(tx, i) {
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var hash = tx.hash('hex');
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var uniq = {};
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tx.inputs.forEach(function(input) {
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var coin, address;
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if (input.isCoinbase())
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return;
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assert(input.output);
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if (self.options.indexAddress) {
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address = input.getAddress();
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if (address && !uniq[address]) {
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uniq[address] = true;
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batch.del('t/a/' + address + '/' + hash);
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}
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if (address) {
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batch.put('u/a/' + address
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+ '/' + input.prevout.hash
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+ '/' + input.prevout.index,
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DUMMY);
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}
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}
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batch.put('u/t/'
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+ input.prevout.hash
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+ '/' + input.prevout.index,
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input.output.toExtended());
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});
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tx.outputs.forEach(function(output, i) {
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var address;
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if (self.options.indexAddress) {
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address = output.getAddress();
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if (address && !uniq[address]) {
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uniq[address] = true;
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batch.del('t/a/' + address + '/' + hash);
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}
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if (address)
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batch.del('u/a/' + address + '/' + hash + '/' + i);
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}
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batch.del('u/t/' + hash + '/' + i);
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});
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});
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self.emit('remove block', block);
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return callback(null, block);
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});
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};
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BlockDB.prototype.fillCoin = function fillCoin(tx, callback) {
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var self = this;
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callback = utils.asyncify(callback);
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if (Array.isArray(tx)) {
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return utils.forEach(tx, function(tx, next) {
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self.fillCoin(tx, next);
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}, function(err) {
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if (err)
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return callback(err);
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return callback(null, tx);
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});
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}
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if (tx.isCoinbase())
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return callback(null, tx);
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utils.forEach(tx.inputs, function(input, next) {
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if (input.output)
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return next();
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self.getCoin(input.prevout.hash, input.prevout.index, function(err, coin) {
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if (err)
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return callback(err);
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if (coin)
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input.output = coin;
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next();
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});
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}, function(err) {
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if (err)
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return callback(err);
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return callback(null, tx);
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});
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};
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BlockDB.prototype.fillTX = function fillTX(tx, callback) {
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var self = this;
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callback = utils.asyncify(callback);
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if (Array.isArray(tx)) {
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return utils.forEach(tx, function(tx, next) {
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self.fillTX(tx, next);
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}, function(err) {
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if (err)
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return callback(err);
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return callback(null, tx);
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});
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}
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if (tx.isCoinbase())
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return callback(null, tx);
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utils.forEach(tx.inputs, function(input, next) {
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if (input.output)
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return next();
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self.getTX(input.prevout.hash, function(err, tx) {
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if (err)
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return next(err);
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if (tx)
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input.output = bcoin.coin(tx, input.prevout.index);
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next();
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});
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}, function(err) {
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if (err)
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return callback(err);
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return callback(null, tx);
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});
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};
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BlockDB.prototype.getCoinsByAddress = function getCoinsByAddress(addresses, options, callback) {
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var self = this;
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var ids = [];
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var coins = [];
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if (!callback) {
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callback = options;
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options = {};
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}
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if (typeof addresses === 'string')
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addresses = [addresses];
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addresses = utils.uniqs(addresses);
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utils.forEach(addresses, function(address, done) {
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var iter = self.db.db.iterator({
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gte: 'u/a/' + address,
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lte: 'u/a/' + address + '~',
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keys: true,
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values: true,
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fillCache: true,
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keyAsBuffer: false,
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valueAsBuffer: true
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});
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(function next() {
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iter.next(function(err, key, value) {
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var parts, hash, index;
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if (err) {
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return iter.end(function() {
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done(err);
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});
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}
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if (key === undefined) {
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return iter.end(function(err) {
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if (err)
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return done(err);
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done();
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});
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}
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parts = key.split('/');
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hash = parts[3];
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index = +parts[4];
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ids.push([hash, index]);
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next();
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});
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})();
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}, function(err) {
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if (err)
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return callback(err);
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utils.forEach(ids, function(item, next) {
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var hash = item[0];
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var index = item[1];
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self.getCoin(hash, index, function(err, coin) {
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if (err)
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return next(err);
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if (!coin)
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return next();
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coins.push(coin);
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next();
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});
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}, function(err) {
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if (err)
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return callback(err);
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return callback(null, coins);
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});
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});
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};
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BlockDB.prototype.getCoin = function getCoin(hash, index, callback) {
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var self = this;
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var id = 'u/t/' + hash + '/' + index;
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var coin;
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this.db.get(id, function(err, data) {
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if (err) {
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if (err.type === 'NotFoundError')
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return callback();
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return callback(err);
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}
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try {
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coin = bcoin.coin.fromExtended(data);
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} catch (e) {
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return callback(e);
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}
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return callback(null, coin);
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});
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};
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BlockDB.prototype.getTXByAddress = function getTXByAddress(addresses, options, callback) {
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var self = this;
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var hashes = [];
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var txs = [];
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var have = {};
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if (!callback) {
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callback = options;
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options = {};
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}
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if (typeof addresses === 'string')
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addresses = [addresses];
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addresses = utils.uniqs(addresses);
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utils.forEach(addresses, function(address, done) {
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var iter = self.db.db.iterator({
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gte: 't/a/' + address,
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lte: 't/a/' + address + '~',
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keys: true,
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values: true,
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fillCache: true,
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keyAsBuffer: false,
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valueAsBuffer: true
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});
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(function next() {
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iter.next(function(err, key, value) {
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var hash;
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if (err) {
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return iter.end(function() {
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done(err);
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});
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}
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if (key === undefined) {
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return iter.end(function(err) {
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if (err)
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return done(err);
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done();
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});
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}
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hash = key.split('/')[3];
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if (addresses.length > 1) {
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if (have[hash])
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return next();
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have[hash] = true;
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}
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hashes.push(hash);
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});
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})();
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}, function(err) {
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utils.forEach(hashes, function(hash, next) {
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self.getTX(hash, function(err, tx) {
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if (err)
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return next(err);
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if (!tx)
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return next();
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txs.push(tx);
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next();
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});
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}, function(err) {
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if (err)
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return callback(err);
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return callback(null, txs);
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});
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});
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};
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BlockDB.prototype.getTX = function getTX(hash, callback) {
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var self = this;
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var id = 't/t/' + hash;
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var tx;
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this.db.get(id, function(err, data) {
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if (err) {
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if (err.type === 'NotFoundError')
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return callback();
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return callback(err);
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}
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try {
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tx = bcoin.tx.fromExtended(data);
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} catch (e) {
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return callback(e);
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}
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if (self.options.paranoid && tx.hash('hex') !== hash)
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return callback(new Error('BlockDB is corrupt. All is lost.'));
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return callback(null, tx);
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});
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};
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BlockDB.prototype.getFullTX = function getFullTX(hash, callback) {
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var self = this;
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return this.getTX(hash, function(err, tx) {
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if (err)
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return callback(err);
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if (!tx)
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return callback();
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return self.fillTX(tx, function(err) {
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if (err)
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return callback(err);
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return callback(null, tx);
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});
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});
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};
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BlockDB.prototype.getFullBlock = function getFullBlock(hash, callback) {
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var self = this;
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return this.getBlock(hash, function(err, block) {
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if (err)
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return callback(err);
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if (!block)
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return callback();
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return self.fillTX(block.txs, function(err) {
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if (err)
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return callback(err);
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return callback(null, block);
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});
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});
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};
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BlockDB.prototype._getCoinBlock = function _getCoinBlock(hash, callback) {
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var self = this;
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if (hash instanceof bcoin.block)
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return callback(null, hash);
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return this.getBlock(hash, function(err, block) {
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if (err)
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return callback(err);
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if (!block)
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return callback();
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return self.fillBlock(block, callback);
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});
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};
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BlockDB.prototype._getTXBlock = function _getTXBlock(hash, callback) {
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var self = this;
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if (hash instanceof bcoin.block)
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return callback(null, hash);
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return this.getBlock(hash, function(err, block) {
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if (err)
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return callback(err);
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if (!block)
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return callback();
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return self.fillTXBlock(block, callback);
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});
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};
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BlockDB.prototype.fillBlock = function fillBlock(block, callback) {
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var self = this;
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return this.fillCoin(block.txs, function(err) {
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var coins, i, tx, hash, j, input, id;
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if (err)
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return callback(err);
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coins = {};
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for (i = 0; i < block.txs.length; i++) {
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tx = block.txs[i];
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hash = tx.hash('hex');
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for (j = 0; j < tx.inputs.length; j++) {
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input = tx.inputs[j];
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id = input.prevout.hash + '/' + input.prevout.index;
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if (!input.output && coins[id]) {
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input.output = coins[id];
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delete coins[id];
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}
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}
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for (j = 0; j < tx.outputs.length; j++)
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coins[hash + '/' + j] = bcoin.coin(tx, j);
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}
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return callback(null, block);
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});
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};
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BlockDB.prototype.fillTXBlock = function fillTXBlock(block, callback) {
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var self = this;
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return this.fillTX(block.txs, function(err) {
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var coins, i, tx, hash, j, input, id;
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if (err)
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return callback(err);
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coins = {};
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for (i = 0; i < block.txs.length; i++) {
|
|
tx = block.txs[i];
|
|
hash = tx.hash('hex');
|
|
|
|
for (j = 0; j < tx.inputs.length; j++) {
|
|
input = tx.inputs[j];
|
|
id = input.prevout.hash + '/' + input.prevout.index;
|
|
if (!input.output && coins[id]) {
|
|
input.output = coins[id];
|
|
delete coins[id];
|
|
}
|
|
}
|
|
|
|
for (j = 0; j < tx.outputs.length; j++)
|
|
coins[hash + '/' + j] = bcoin.coin(tx, j);
|
|
}
|
|
|
|
return callback(null, block);
|
|
});
|
|
};
|
|
|
|
BlockDB.prototype._getHash = function _getHash(height, callback) {
|
|
if (typeof height === 'string')
|
|
return callback(null, height);
|
|
|
|
this.db.get('c/h/' + pad32(height), function(err, hash) {
|
|
if (err && err.type !== 'NotFoundError')
|
|
return callback(err);
|
|
if (!hash)
|
|
return callback();
|
|
return callback(null, utils.toHex(hash));
|
|
});
|
|
};
|
|
|
|
BlockDB.prototype.getBlock = function getBlock(hash, callback) {
|
|
var self = this;
|
|
var id, block;
|
|
|
|
return this._getHash(hash, function(err, hash) {
|
|
if (err)
|
|
return callback(err);
|
|
|
|
if (!hash)
|
|
return callback();
|
|
|
|
id = 'b/b/' + hash;
|
|
|
|
self.db.get(id, function(err, data) {
|
|
if (err) {
|
|
if (err.type === 'NotFoundError')
|
|
return callback();
|
|
return callback(err);
|
|
}
|
|
|
|
try {
|
|
block = bcoin.block.fromCompact(data);
|
|
} catch (e) {
|
|
return callback(e);
|
|
}
|
|
|
|
block.txs = [];
|
|
|
|
utils.forEach(block.hashes, function(hash, next, i) {
|
|
self.getTX(hash, function(err, tx) {
|
|
if (err)
|
|
return next(err);
|
|
|
|
if (!tx)
|
|
return next(new Error('TX not found.'));
|
|
|
|
block.txs[i] = tx;
|
|
|
|
next();
|
|
});
|
|
}, function(err) {
|
|
if (err)
|
|
return callback(err);
|
|
|
|
delete block.hashes;
|
|
block = new bcoin.block(block);
|
|
return callback(null, block);
|
|
});
|
|
});
|
|
});
|
|
};
|
|
|
|
BlockDB.prototype.hasBlock = function hasBlock(hash, callback) {
|
|
var self = this;
|
|
var id = 'b/b/' + hash;
|
|
|
|
if (typeof hash === 'number')
|
|
id = 'b/h/' + pad32(hash);
|
|
|
|
this.db.get(id, function(err, data) {
|
|
if (err && err.type !== 'NotFoundError')
|
|
return callback(err);
|
|
|
|
if (!data)
|
|
return callback(null, false);
|
|
|
|
return callback(null, true);
|
|
});
|
|
};
|
|
|
|
BlockDB.prototype.hasCoin = function hasCoin(hash, index, callback) {
|
|
var self = this;
|
|
var id = 'u/t/' + hash + '/' + index;
|
|
|
|
this.db.get(id, function(err, data) {
|
|
if (err && err.type !== 'NotFoundError')
|
|
return callback(err);
|
|
|
|
if (!data)
|
|
return callback(null, false);
|
|
|
|
return callback(null, true);
|
|
});
|
|
};
|
|
|
|
BlockDB.prototype._getTX = function _getTX(hash, callback) {
|
|
if (hash instanceof bcoin.tx)
|
|
return callback(null, hash);
|
|
return this.getTX(hash);
|
|
};
|
|
|
|
// For BIP30
|
|
// https://bitcointalk.org/index.php?topic=67738.0
|
|
BlockDB.prototype.isUnspentTX = function isUnspentTX(hash, callback) {
|
|
return this.isSpentTX(hash, function(err, spent) {
|
|
if (err)
|
|
return callback(err);
|
|
|
|
return callback(null, !spent);
|
|
});
|
|
};
|
|
|
|
BlockDB.prototype.isSpentTX = function isSpentTX(hash, callback) {
|
|
var spent = true;
|
|
|
|
// Important!
|
|
if (hash.hash)
|
|
hash = hash.hash('hex');
|
|
|
|
var iter = this.db.db.iterator({
|
|
gte: 'u/t/' + hash,
|
|
lte: 'u/t/' + hash + '~',
|
|
keys: true,
|
|
values: false,
|
|
fillCache: false,
|
|
keyAsBuffer: false
|
|
});
|
|
|
|
(function next() {
|
|
iter.next(function(err, key, value) {
|
|
if (err) {
|
|
return iter.end(function() {
|
|
done(err);
|
|
});
|
|
}
|
|
|
|
if (key === undefined)
|
|
return iter.end(done);
|
|
|
|
spent = false;
|
|
|
|
// IMPORTANT!
|
|
iter.end(done);
|
|
});
|
|
})();
|
|
|
|
function done(err) {
|
|
if (err)
|
|
return callback(err);
|
|
|
|
return callback(null, spent);
|
|
}
|
|
};
|
|
|
|
BlockDB.prototype.hasTX = function hasTX(hash, callback) {
|
|
var self = this;
|
|
var id = 't/t/' + hash;
|
|
|
|
this.db.get(id, function(err, data) {
|
|
if (err && err.type !== 'NotFoundError')
|
|
return callback(err);
|
|
|
|
if (!data)
|
|
return callback(null, false);
|
|
|
|
return callback(null, true);
|
|
});
|
|
};
|
|
|
|
BlockDB.prototype.isSpent = function isSpent(hash, index, callback) {
|
|
return this.hasCoin(hash, index, function(err, result) {
|
|
if (err)
|
|
return callback(err);
|
|
|
|
return callback(null, !result);
|
|
});
|
|
};
|
|
|
|
BlockDB.prototype._pruneBlock = function _pruneBlock(block, batch, callback) {
|
|
var self = this;
|
|
|
|
// For much more aggressive pruning, we could delete
|
|
// the block headers 288 blocks before this one here as well.
|
|
|
|
return utils.forEachSerial(block.txs, function(tx, next) {
|
|
self._pruneTX(tx, batch, next);
|
|
}, function(err) {
|
|
if (err)
|
|
return callback(err);
|
|
|
|
self._pruneQueue(block, batch, function(err) {
|
|
if (err)
|
|
return callback(err);
|
|
return callback();
|
|
});
|
|
});
|
|
};
|
|
|
|
BlockDB.prototype._pruneTX = function _pruneTX(tx, batch, callback) {
|
|
var self = this;
|
|
var watermark = tx.height - self.keepBlocks;
|
|
|
|
if (tx.isCoinbase())
|
|
return callback();
|
|
|
|
utils.forEachSerial(tx.inputs, function(input, next) {
|
|
self.isSpentTX(input.prevout.hash, function(err, result) {
|
|
var futureHeight;
|
|
|
|
if (err)
|
|
return next(err);
|
|
|
|
if (!result)
|
|
return next();
|
|
|
|
// Output's tx is below the watermark. It's not
|
|
// safe to delete yet. Queue it up to be deleted
|
|
// at a future height.
|
|
if (watermark >= 0 && input.output.height > watermark) {
|
|
futureHeight = input.output.height + watermark;
|
|
// This may screw up txs that end up being
|
|
// in a side chain in the future, but technically
|
|
// they should be safe to delete anyway at the
|
|
// future height. It's unlikely there will be
|
|
// _another_ reorg to take over 288 blocks.
|
|
batch.put('t/q/' + futureHeight + '/' + input.prevout.hash, DUMMY);
|
|
return next();
|
|
}
|
|
|
|
self._removeTX(input.prevout.hash, batch, next);
|
|
});
|
|
}, callback);
|
|
};
|
|
|
|
BlockDB.prototype._removeTX = function _removeTX(hash, batch, callback) {
|
|
var self = this;
|
|
var uniq = {};
|
|
|
|
batch.del('t/t/' + hash);
|
|
|
|
if (!self.options.indexAddress)
|
|
return callback();
|
|
|
|
this.getTX(hash, function(err, tx) {
|
|
if (err)
|
|
return callback(err);
|
|
|
|
if (!tx)
|
|
return callback();
|
|
|
|
tx.inputs.forEach(function(input) {
|
|
var address;
|
|
|
|
if (input.isCoinbase())
|
|
return;
|
|
|
|
// Since we may have pruned these outputs, we have to
|
|
// guess at the address. Should be correct 90% of the
|
|
// time, though we may leave some fluff behind. Not
|
|
// a perfect pruning, but probably good enough.
|
|
address = input.getAddress();
|
|
|
|
if (address && !uniq[address]) {
|
|
uniq[address] = true;
|
|
batch.del('t/a/' + address + '/' + hash);
|
|
}
|
|
});
|
|
|
|
tx.outputs.forEach(function(output, i) {
|
|
var address = output.getAddress();
|
|
|
|
if (address && !uniq[address]) {
|
|
uniq[address] = true;
|
|
batch.del('t/a/' + address + '/' + hash);
|
|
}
|
|
});
|
|
|
|
callback();
|
|
});
|
|
};
|
|
|
|
BlockDB.prototype._pruneQueue = function _pruneQueue(block, batch, callback) {
|
|
var self = this;
|
|
var hashes = [];
|
|
var iter = self.db.db.iterator({
|
|
gte: 't/q/' + block.height,
|
|
lte: 't/q/' + block.height + '~',
|
|
keys: true,
|
|
values: false,
|
|
fillCache: false,
|
|
keyAsBuffer: false
|
|
});
|
|
|
|
(function next() {
|
|
iter.next(function(err, key, value) {
|
|
var parts, hash, index;
|
|
|
|
if (err) {
|
|
return iter.end(function() {
|
|
done(err);
|
|
});
|
|
}
|
|
|
|
if (key === undefined)
|
|
return iter.end(done);
|
|
|
|
parts = key.split('/');
|
|
hash = parts[3];
|
|
|
|
hashes.push(hash);
|
|
|
|
next();
|
|
});
|
|
})();
|
|
|
|
function done(err) {
|
|
if (err)
|
|
return callback(err);
|
|
|
|
if (hashes.length)
|
|
utils.debug('Retroactively pruning txs at height %d', block.height);
|
|
|
|
utils.forEachSerial(hashes, function(hash, next) {
|
|
batch.del('t/q/' + block.height + '/' + hash);
|
|
self._removeTX(hash, batch, next);
|
|
}, callback);
|
|
}
|
|
};
|
|
|
|
BlockDB.prototype.batch = function batch() {
|
|
if (this.fsync)
|
|
return new utils.SyncBatch(this.db);
|
|
return this.db.batch();
|
|
};
|
|
|
|
/**
|
|
* Expose
|
|
*/
|
|
|
|
module.exports = BlockDB;
|