Node.Js生成比特幣地址代碼解析

2019-11-19 13:59:18

字體：大中小

供稿：網(wǎng)友

使用Node.js，IDE采用sublime 3。

var randomBytes = require('randombytes')var BigInteger = require('bigi')var ecurve = require('ecurve')var crypto = require('crypto')var cs = require('coinstring')var secp256k1 = ecurve.getCurveByName('secp256k1')var randombytes = randomBytes(32).toString('hex')var privateKey = new Buffer(randombytes, 'hex')console.log("私鑰:" + privateKey.toString('hex'))var ecparams = ecurve.getCurveByName('secp256k1')var curvePt = ecparams.G.multiply(BigInteger.fromBuffer(privateKey))var x = curvePt.affineX.toBuffer(32)var y = curvePt.affineY.toBuffer(32)var publicKey = Buffer.concat([new Buffer([0x04]), x, y])console.log("標(biāo)準(zhǔn)地址:" + publicKey.toString('hex'))//compressedpublicKey = curvePt.getEncoded(true) //true forces compressed public keyconsole.log("compressed:" + publicKey.toString('hex'))var sha = crypto.createHash('sha256').update(publicKey).digest()var pubkeyHash = crypto.createHash('rmd160').update(sha).digest()// pubkeyHash of compressed public keyconsole.log("pubkeyHash:" + pubkeyHash.toString('hex')) // address of compressed public keyconsole.log("壓縮地址：" + cs.encode(pubkeyHash, 0x0)) //<-- 0x0 is for public addresses//這里還缺失校驗(yàn)和Base58編碼console.log(cs.encode(privateKey, 0x80)) //<--- 0x80 is for private addressesconsole.log(cs.encode(Buffer.concat([privateKey, new Buffer([0])]), 0x80)) // <-- compressed private address

生成比特幣地址

1.生成隨機(jī)私鑰，私鑰是一個(gè)32字節(jié)的數(shù) 例如：

8F72F6B29E6E225A36B68DFE333C7CE5E55D83249D3D2CD6332671FA445C4DD3

2.橢圓曲線計(jì)算公鑰生成了私鑰之后，我們使用橢圓曲線加密算法（ECDSA-secp256k1）計(jì)算私鑰所對(duì)應(yīng)的非壓縮公鑰，生成的公鑰共65字節(jié)，第一個(gè)字節(jié)是0x04，后32個(gè)字節(jié)是X坐標(biāo)，32個(gè)字節(jié)是Y坐標(biāo)：公鑰P.X：