93c6ff845e
- Write indexer state and index atomically. - Simplify chain state with current height. - Roll forward to best height. - Synchronize the index with the chain with common method `sync` for the events 'connect', 'disconnect' and 'reset'. This will prevent any of the events from conflicting with each other. - Fix the chain rollback and reset. - Make sure blocks are connected in the correct order. - Improve logging to log similar to chain.
153 lines
2.5 KiB
JavaScript
153 lines
2.5 KiB
JavaScript
/*!
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* records.js - indexer records
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* Copyright (c) 2018, the bcoin developers (MIT License).
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* https://github.com/bcoin-org/bcoin
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*/
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'use strict';
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/**
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* @module lib/records
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*/
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const bio = require('bufio');
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const util = require('../utils/util');
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const consensus = require('../protocol/consensus');
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/**
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* Block Meta
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* @alias module:indexer.BlockMeta
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*/
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class BlockMeta {
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/**
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* Create block meta.
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* @constructor
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* @param {Hash} hash
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* @param {Number} height
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*/
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constructor(hash, height) {
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this.hash = hash || consensus.NULL_HASH;
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this.height = height != null ? height : -1;
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}
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/**
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* Clone the block.
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* @returns {BlockMeta}
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*/
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clone() {
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return new this.constructor(this.hash, this.height);
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}
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/**
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* Get block meta hash as a buffer.
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* @returns {Buffer}
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*/
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toHash() {
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return Buffer.from(this.hash, 'hex');
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}
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/**
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* Instantiate block meta from chain entry.
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* @private
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* @param {IndexEntry} entry
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*/
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fromEntry(entry) {
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this.hash = entry.hash;
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this.height = entry.height;
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return this;
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}
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/**
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* Instantiate block meta from json object.
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* @private
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* @param {Object} json
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*/
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fromJSON(json) {
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this.hash = util.revHex(json.hash);
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this.height = json.height;
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return this;
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}
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/**
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* Instantiate block meta from serialized tip data.
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* @private
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* @param {Buffer} data
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*/
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fromRaw(data) {
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const br = bio.read(data);
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this.hash = br.readHash('hex');
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this.height = br.readI32();
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return this;
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}
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/**
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* Instantiate block meta from chain entry.
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* @param {IndexEntry} entry
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* @returns {BlockMeta}
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*/
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static fromEntry(entry) {
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return new this().fromEntry(entry);
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}
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/**
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* Instantiate block meta from json object.
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* @param {Object} json
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* @returns {BlockMeta}
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*/
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static fromJSON(json) {
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return new this().fromJSON(json);
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}
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/**
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* Instantiate block meta from serialized data.
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* @param {Hash} hash
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* @param {Buffer} data
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* @returns {BlockMeta}
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*/
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static fromRaw(data) {
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return new this().fromRaw(data);
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}
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/**
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* Serialize the block meta.
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* @returns {Buffer}
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*/
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toRaw() {
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const bw = bio.write(36);
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bw.writeHash(this.hash);
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bw.writeI32(this.height);
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return bw.render();
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}
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/**
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* Convert the block meta to a more json-friendly object.
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* @returns {Object}
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*/
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toJSON() {
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return {
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hash: util.revHex(this.hash),
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height: this.height
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};
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}
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}
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/*
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* Expose
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*/
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exports.BlockMeta = BlockMeta;
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module.exports = exports;
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