ENS阅读笔记

关于ENS

以太坊域名服务(ENS)类似于DNS。但它通过一种更安全和且去中心化的方式来管理网站域名，而且可以通过它发送ETH和ERC-20代币。 ENS注册表记录所有域和子域，以及所有者的详细信息和指向解析器的链接；而解析器是另一个智能合约，处理从名称到地址或其他类型资源的转换，反之亦然。 ENS的运行类似于互联网的DNS，因为它有一个分级系统，允许域名所有者完全控制任何子域。

web3.eth.ens文档地址：https://web3js.readthedocs.io/en/v1.5.2/web3-eth-ens.html#eth-ens

ENS文档地址：https://docs.ens.domains/

ENS开源地址：https://github.com/ensdomains

ens-subgraph开源地址：https://github.com/graphprotocol/ens-subgraph

合约分布

ETHRegistrarController
DefaultReverseResolver
PublicResolver
ReverseRegistrar
BaseRegistrarImplementation
ENSRegistryWithFallback
BulkRenewal

工具类代码块

const ETHRegistrarControllerContract = new web3.eth.Contract(
      ETHRegistrarControllerAbi,
      ETHRegistrarControllerAddress
    )
const ReverseRegistrarContract = new web3.eth.Contract(
      ReverseRegistraAbi,
      ReverseRegistraAddress
    )

randomString(length) {
      var str =
        "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
      var result = "";
      for (var i = length; i > 0; --i)
        result += str[Math.floor(Math.random() * str.length)];
      return result;
    }

获取域名价格

const name = "xxx.xyz".split('.')[0]//只取域名前缀xxx
ETHRegistrarControllercontract.methods
      .rentPrice(name, 31536000)//获取一年的价格
      .call()
      .then((res) => {

		});

注册域名 提交注册申请

let bytes = ''
const name = "xxx.xyz".split('.')[0]//只取域名前缀
ETHRegistrarControllerContract.methods
        .makeCommitmentWithConfig(
          name,
          window.ethereum.selectedAddress,
          Web3.utils.sha3(randomString(12)),
          PublicResolverAddress,
          window.ethereum.selectedAddress
        )
        .call()
        .then((res) => {
          bytes = res;
        });

ETHRegistrarControllerContract.methods
        .commit(bytes)
        .send({ from: window.ethereum.selectedAddress })

        .on("receipt", function (receipt) {
          
        })

需等待1min

完成注册

ETHRegistrarControllerContract.contract.methods
          .registerWithConfig(
            name,
            window.ethereum.selectedAddress,
            31556952 * years,//注册年数，单位s
             Web3.utils.sha3(randomString(12)),
            PublicResolverAddress,
            window.ethereum.selectedAddress
          )
          .send({
            from: window.ethereum.selectedAddress,
            value: price * 1.2 * years,//价格*年数
          })

设置主 ENS 名称

**ReverseRegistrarContract**.methods
        .setName('xxxx.xyz')
        .send({ from: window.ethereum.selectedAddress })

        .on("receipt", function (receipt) {
          
        })

设置解析记录

const PublicResolverContract = new Web3.eth.Contract(
           PublicResolverAbi,
            resolverAddress,//ENSRegistryWithFallbackContract.resolver
          )
var domainHash = namehash.hash(
          'xxx.xyz'//ens域名地址
      );
PublicResolverContract.methods
.setAddr(domainHash, coinType, "0x" + formatsByName["ETH"].decoder(inputAddress).toString("hex"))
.on("receipt", function (receipt) {
          
        })

获取数据 通过合约获取数据

获取owner和resolver

var namehash = require("eth-ens-namehash");
const web3 = new Web3(window.ethereum)
      const ENSRegistryWithFallbackContract = new web3.eth.Contract(
          ABI,
         ENSRegistryWithFallbackAddress
      );
      var domainHash = namehash.hash(
          'xxx.xyz'//ens域名地址
      );
      ENSRegistryWithFallbackContract.methods
          .owner(domainHash)
          .call().then(res => {
        
      })
      ENSRegistryWithFallbackContract.methods
          .resolver(domainHash)
          .call().then(res => {
        
      })

获取ens域名解析记录

var domainHash = namehash.hash(
          'xxx.xyz'//ens域名地址
      );
const PublicResolverContract = new Web3.eth.Contract(
           PublicResolverAbi,
            resolverAddress,//ENSRegistryWithFallbackContract.resolver
          )
PublicResolverContract.methods
  .addr(domainHash, coinType)//coinTypes在graph可查，看下方graph代码块
  .call()
  .then((res) => {
})

通过graph获取数据

数据基本都用graph查询

获取注册信息

const name = "xxx.xyz".split('.')[0]//只取域名前缀
const id = Web3.utils.sha3(name)
axios.post(
    this.GLOBAL.netdata.api_url,
    {
      query: `
        {
			  registration(id: "${id}") {
			    id
			    registrationDate
			    domain {
			      name
			    }
			    registrant {
			      id
			    }
			  }
			}
        `
    }

).then((res) => {
  
});

获取域名信息

var domainHash = namehash.hash(
          'xxx.xyz'//ens域名地址
      );
axios.post(
graphUrl,
{
  query: `
   {
  domain(id: "${domainHash}") {
    id
    name
    resolver {
      coinTypes
      texts
    }
  }
}
 `
}

).then((res) => {

});

通过ethers.js调用

ethers.js原生支持ens

const provider = new ethers.providers.JsonRpcProvider('https://rinkeby.infura.io/v3/3dd7eb5d146740f4a47e136531e7795e', {
      chainId: 4,
      name: 'rinkeby',
      ensAddress: ensAddress
    })
const resolver  = await provider.getResolver('xxx.xyz')
const x = await resolver.getAddress(60)//参数是coinType
// 获取余额
const resolver  = await provider.getBalance('xxx.xyz')

获取其他值阅读ethjs文档：https://docs.ethers.io/v5/api/providers/provider/#EnsResolver

库

对于批量获取，可以使用ensjs库

@ensdomains/ensjs：https://www.npmjs.com/package/@ensdomains/ensjs