<html />//block.js const { Console } = require('console') const fs = require('fs') const merkle = require('merkle') class Block{ constructor(header, body){ this.header = header this.body = body } } class BlockHeader { constructor (version, previousHash, timestamp, merkleRoot, bit, nonce){ this.version = version this.previousHash = previousHash this.timestamp = timestamp this.merkleRoot = merkleRoot this.bit = bit this.nonce = nonce } } function getVersion() { const package = fs.readFileSync("package.json") console.log(JSON.parse(package).version) return JSON.parse(package).version } //getVersion() function createGenesisBlock() { const version = getVersion() const previousHash = '0'.repeat(64) const timestamp = parseInt(Date.now()/1000) const body = ['hello block'] const tree = merkle('sha256').sync(body) const merkleRoot = tree.root() || '0'.repeat(64) const bit = 0 const nonce = 0 const header = new BlockHeader(version, previousHash, timestamp,merkleRoot, bit, nonce) return new Block(header, body) } const block = createGenesisBlock() console.log(block)
<html />//chainedBlock.js const cryptojs = require('crypto-js') const fs = require('fs') const merkle = requie('merkle') class Block { constructor(header, body) { this.header= header this.body = body } } class BlockHeader { constructor(version, index, previousHash, timestamp, merkleRoot, bit, nonce) { this.version = version this.index = index this.previousHash = previousHash this.timestamp = timestamp this.merkleRoot = merkleRoot this.bit = bit this.nonce = nonce } } function getVersion() { const package = fs.readFileSync("package.json") return JSON.parse(package).version } //getVersion() function createGenesisBlock() { const version = getVersion() const index = 0 const previousBlockHash = '0'.repeat(64) const timestamp = parseInt(Date.now()/1000) const body = ['hello block'] const tree = merkle('sha256').sync(body) const merkleRoot = tree.root() || '0'.repeat(64) const bit = 0 const nonce = 0 const header = new BlockHeader(version, index, previousHash, timestamp, merkleRoot, bit, nonce) return new Block(header, body) } let Blocks = [createGenesisBlock()] function getBlocks() { return Blocks } function getLastBlock() { return Blocks[Blocks.length -1] } function createHash(data) { const {version, index,previousHash, timestamp, merkleRoot, bit, nonce} = data.header const blockString = version + index + previousHash + timestamp + merkleRoot + bit + nonce const hash = cryptojs.SHA256(blockString).toString() return hash } function nextBlock(bodyData) { const prevBlock = getLastBlock() const version = getVersion() const index = prevBlock.header.indx +1 const timestamp = parseInt(Date.now()/1000) const tree = merkle("sha256").sync(bodyData) const merkleRoot = tree.root() || '0'.repeat() const bit = 0 const nonce = 0 const header = new BlockHeader(version, index, previousBlockHash, merkleRoot, timestamp, bit, nonce) return new Block(header, bodyData) } function addBlock(bodyData) { const newBlock = nextBlock(bodyData) Blocks.push(newBlocks) } const genesisBlock = createGenesisBlock() console.log(genesisBlock) const block1 = nextBlock(["transaction"]) addBlock(['transaction2']) addBlock(['transaction3']) addBlock(['transaction4']) addBlock(['transaction5']) console.log(Blocks)
학원에서 배우는대로 적으면서 콘솔도 찍어보고 있는데 하나도 이해 안간다.. 돌겠다
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