ETH

兼容web3

MYKEY兼容web3协议，您可以直接开发兼容web3协议的dapp，再通过mykey内置浏览器访问。也可以参考以下链接，了解更多eth web3协议的内容：

https://web3js.readthedocs.io/en/v1.2.0/web3-eth.html

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使用web3.eth的givenProvider方法即可获得用户的账号信息。

{
      var Web3 = require('web3');
      var web3;
      if (typeof web3 !== 'undefined') {
          web3 = new Web3(web3.currentProvider);
      } else {
// set the provider you want from Web3.providers
          web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545")); //这一步是连接到以太坊节点
      }
      var version = web3.version;
      //解析web3.eth.givenProvider的返回，即可获得用户的ETH地址
      console.log(JSON.stringify(web3.eth.givenProvider));
  }

验证MYKEY的签名

因为mykey账号的独特设计，客户端会使用Reserved公钥签名，服务端需要使用Reserved公钥验证签名。比如我们使用web3协议进行签名和验签：

let sigUtil = require('eth-sig-util') 
let Web3 = require('web3'); 
let web3 = new Web3(new Web3.providers.HttpProvider("https://mainnet.infura.io/v3/56444e75b6a24070a374f791bd25f811")); 
let json = require('./AccountStorage.abi.json'); 
let AccountStorageABI = json.abi 
let AccountStorageAddr = '0xADc92d1fD878580579716d944eF3460E241604b7' 
let AccountStorageIns = new web3.eth.Contract(AccountStorageABI, AccountStorageAddr); 

// 1. get mykey account Reserved key 
// https://docs.mykey.org/dive-into-mykey/mykey-on-eos#keydata%E8%A1%A8%E4%B8%AD%E7%9A%84%E5%AF%86%E9%92%A5
let account = '0x67913A00a459fCd41CbF4124a887e8d8dE0742c0' 

// account proxy 
let reservedKeyAddr = await AccountStorageIns.methods.getKeyData(account, 3).call(); 
console.log(account, "reserved key:", reservedKeyAddr) // should be 0xd2F9b4652D80FA870207C2b421B8437d7D54a484
// 2. sign message, 
web3.personal.sign("hello", web3.eth.coinbase, console.log); 
let message = 'hello' 
let privKeyHex = '78e2219400da88378b746499ec8ff0d6aa97f806950276f28c65b9d569f32f84' // prvkey of '0xd2F9b4652D80FA870207C2b421B8437d7D54a484' 
let privKey = Buffer.from(privKeyHex, 'hex') 
let msgParams = { data: message }
let signed = sigUtil.personalSign(privKey, msgParams) 
console.log("signature:", signed)

// 3. recover 
msgParams.sig = signed 
let recovered = sigUtil.recoverPersonalSignature(msgParams) 
console.log("recovered:", recovered) 
console.log(reservedKeyAddr.toLowerCase() === recovered.toLowerCase()