hsd
Version:
Cryptocurrency bike-shed
144 lines (111 loc) • 2.5 kB
JavaScript
/*!
* blockstore/records.js - blockstore records
* Copyright (c) 2019, Braydon Fuller (MIT License).
* https://github.com/handshake-org/hsd
*/
'use strict';
const assert = require('bsert');
const bio = require('bufio');
/** @typedef {import('../types').BufioWriter} BufioWriter */
/**
* @module blockstore/records
*/
/**
* Block Record
*/
class BlockRecord extends bio.Struct {
/**
* Create a block record.
* @constructor
*/
constructor(options = {}) {
super();
this.file = options.file || 0;
this.position = options.position || 0;
this.length = options.length || 0;
assert((this.file >>> 0) === this.file);
assert((this.position >>> 0) === this.position);
assert((this.length >>> 0) === this.length);
}
/**
* Get size of the serialized block record.
* @returns {Number}
*/
getSize() {
return 12;
}
/**
* Inject properties from buffer reader.
* @param {bio.BufferReader} br
*/
read(br) {
this.file = br.readU32();
this.position = br.readU32();
this.length = br.readU32();
return this;
}
/**
* Serialize the block record.
* Write block record to a buffer writer
* @param {BufioWriter} bw
* @returns {BufioWriter}
*/
write(bw) {
bw.writeU32(this.file);
bw.writeU32(this.position);
bw.writeU32(this.length);
return bw;
}
}
/**
* File Record
*/
class FileRecord extends bio.Struct {
/**
* Create a file record.
* @constructor
*/
constructor(options = {}) {
super();
this.blocks = options.blocks || 0;
this.used = options.used || 0;
this.length = options.length || 0;
assert((this.blocks >>> 0) === this.blocks);
assert((this.used >>> 0) === this.used);
assert((this.length >>> 0) === this.length);
}
/**
* Get serialized size of File Record.
* @returns {Number}
*/
getSize() {
return 12;
}
/**
* Inject properties from buffer reader.
* @param {bio.BufferReader} br
*/
read(br) {
this.blocks = br.readU32();
this.used = br.readU32();
this.length = br.readU32();
return this;
}
/**
* Write serialized file record to the buffer writer.
* @param {BufioWriter} bw
* @returns {BufioWriter}
*/
write(bw) {
bw.writeU32(this.blocks);
bw.writeU32(this.used);
bw.writeU32(this.length);
return bw;
}
}
/*
* Expose
*/
exports.BlockRecord = BlockRecord;
exports.FileRecord = FileRecord;
module.exports = exports;