符合标准的EOS助记词生成私钥

最近要对接HD钱包，测试得到EOS的
eosjs-ecc 不符合标准的BIP44

m/44'/194'/0'/0/0

修正方法为

const hdkey = require('hdkey')
const wif = require('wif')
const ecc = require('eosjs-ecc')
const bip39 = require('bip39')
const mnemonic = 'real flame win provide layer trigger soda erode upset rate beef wrist fame design merit'
const seed = bip39.mnemonicToSeedSync(mnemonic)
const master = hdkey.fromMasterSeed(Buffer(seed, 'hex'))
const node = master.derive("m/44'/194'/0'/0/0")
console.log("publicKey: "+ecc.PublicKey(node._publicKey).toString())
console.log("privateKey: "+wif.encode(128, node._privateKey, false))

根据测试例子，修改eosjs-ecc支持扩展方法

package.json 增加新依赖

npm i bip39
npm i hdkey
npm i wif

修改api_common.js 增加bip44参数

默认false兼容之前版本

seedPrivate: (seed, bip44 = false) => PrivateKey.fromSeed(seed, bip44).toString(),

修改 key_private.js

增加新依赖

const hdkey = require('hdkey')
const WIFReturn = require('wif')
const bip39 = require('bip39')

修改fromSeed支持新实现

PrivateKey.fromSeed = function(seed, bip44) { // generate_private_key
    if (!(typeof seed === 'string')) {
        throw new Error('seed must be of type string');
    }
    if(bip44) {
      const seedString = bip39.mnemonicToSeedSync(seed)
      const master = hdkey.fromMasterSeed(Buffer(seedString, 'hex'))
      const node = master.derive("m/44'/194'/0'/0/0")
      return WIFReturn.encode(128, node._privateKey, false)
    }
    return PrivateKey.fromBuffer(hash.sha256(seed));
}

测试

测试助记词

real flame win provide layer trigger soda erode upset rate beef wrist fame design merit

原版eosjs-ecc

<script src="./dist-web/eosjs-ecc.js"></script>
    <script>
   (async () => {
    let wif = eosjs_ecc.seedPrivate('real flame win provide layer trigger soda erode upset rate beef wrist fame design merit');
    console.log(wif + '\n');
    let pubKey = eosjs_ecc.privateToPublic(wif);
    console.log(pubKey + '\n');
   })();
  </script>

生成结果为

5JX94izH6NMZkGqq9VvrmSTWux28HKRyns5mBwujzB9p48XSgNQ
EOS6j4E5ksFkDBAP32XXYseTaUkGqBKqPzYjcwUVeBV4JY8UbS1N5

使用修改后得标准BIP44

<script src="./dist-web/eosjs-ecc.js"></script>
    <script>
   (async () => {
    let wif = eosjs_ecc.seedPrivate('real flame win provide layer trigger soda erode upset rate beef wrist fame design merit',true);
    console.log(wif + '\n');
    let pubKey = eosjs_ecc.privateToPublic(wif);
    console.log(pubKey + '\n');
   })();
  </script>

结果为

5KX4T16FtxG9LvRJukA31TP9BKq3jYve3xQ3Px3ui8mzuJ7nUYE
EOS61oRAVkx1rqPM8mEsBZxPAFAa9Nm6kLa7mQs6mRKTsRTFQaad7

参考

https://github.com/satoshilabs/slips/blob/master/slip-0044.md
https://iancoleman.io/bip39/

备注

eosjs编译时需要先

npm run build

不能直接

npm run build_browser

如果测试自定义得bip44中得 coin type,可以在https://iancoleman.io/bip39/ 中得Derivation Path 选项中，选择BIP32，并去掉最后一层，例如，自定义coin type为9527

m/44'/9527'/0'/0