命名服务

名称注册表

名称注册表存储与域名有关的信息。它由两部分组成：

• 头部 (Header)
• 数据 (Data)

域名的数据始终以头部为前缀。以下是头部在 JavaScript 中的结构：

Press </> button to view full source

import { PublicKey } from "@solana/web3.js";
import { Schema } from "borsh";

export class NameRegistryState {
  parentName: PublicKey;
  owner: PublicKey;
  class: PublicKey;
  data: Buffer | undefined;

  static HEADER_LEN = 96;

  static schema: Schema = new Map([
    [
      NameRegistryState,
      {
        kind: "struct",
        fields: [
          ["parentName", [32]],
          ["owner", [32]],
          ["class", [32]],
        ],
      },
    ],
  ]);
  constructor(obj: {
    parentName: Uint8Array;
    owner: Uint8Array;
    class: Uint8Array;
  }) {
    this.parentName = new PublicKey(obj.parentName);
    this.owner = new PublicKey(obj.owner);
    this.class = new PublicKey(obj.class);
  }
}

export class NameRegistryState {
  parentName: PublicKey;
  owner: PublicKey;
  class: PublicKey;
  data: Buffer | undefined;

  static HEADER_LEN = 96;

  static schema: Schema = new Map([
    [
      NameRegistryState,
      {
        kind: "struct",
        fields: [
          ["parentName", [32]],
          ["owner", [32]],
          ["class", [32]],
        ],
      },
    ],
  ]);
  constructor(obj: {
    parentName: Uint8Array;
    owner: Uint8Array;
    class: Uint8Array;
  }) {
    this.parentName = new PublicKey(obj.parentName);
    this.owner = new PublicKey(obj.owner);
    this.class = new PublicKey(obj.class);
  }
}

解析SOL域名

.SOL 域名是独特的、易于理解的域名，可以转换为公钥。许多钱包使用它们作为发送代币或 SOL 的另一种选项。你可以使用以下方法将 .SOL 域名转换为对应的公钥：

Press </> button to view full source

import {
  getHashedName,
  getNameAccountKey,
  NameRegistryState,
} from "@bonfida/spl-name-service";

import { Connection, clusterApiUrl, PublicKey } from "@solana/web3.js";

(async () => {
  const domain = "levi.sol";
  const hashedName = await getHashedName(domain.replace(".sol", ""));
  const nameAccountKey = await getNameAccountKey(
    hashedName,
    undefined,
    new PublicKey("58PwtjSDuFHuUkYjH9BYnnQKHfwo9reZhC2zMJv9JPkx") // SOL TLD Authority
  );
  const owner = await NameRegistryState.retrieve(
    new Connection(clusterApiUrl("mainnet-beta")),
    nameAccountKey
  );
  console.log(owner.registry.owner.toBase58());
  // JUskoxS2PTiaBpxfGaAPgf3cUNhdeYFGMKdL6mZKKfR
})();

const domain = "levi.sol";
const hashedName = await getHashedName(domain.replace(".sol", ""));
const nameAccountKey = await getNameAccountKey(
  hashedName,
  undefined,
  new PublicKey("58PwtjSDuFHuUkYjH9BYnnQKHfwo9reZhC2zMJv9JPkx") // SOL TLD Authority
);
const owner = await NameRegistryState.retrieve(
  new Connection(clusterApiUrl("mainnet-beta")),
  nameAccountKey
);
console.log(owner.registry.owner.toBase58());
// JUskoxS2PTiaBpxfGaAPgf3cUNhdeYFGMKdL6mZKKfR

反向查找

这可以用于从公钥解析域名。

Press </> button to view full source

import { performReverseLookup } from "@bonfida/spl-name-service";
import { PublicKey, Connection, clusterApiUrl } from "@solana/web3.js";

async () => {
  const connection = new Connection(clusterApiUrl("mainnet-beta"));
  // Public key of bonfida.sol
  const domainKey = new PublicKey(
    "Crf8hzfthWGbGbLTVCiqRqV5MVnbpHB1L9KQMd6gsinb"
  );

  const domainName = await performReverseLookup(connection, domainKey); // bonfida
};

// Public key of bonfida.sol
const domainKey = new PublicKey("Crf8hzfthWGbGbLTVCiqRqV5MVnbpHB1L9KQMd6gsinb");

const domainName = await performReverseLookup(connection, domainKey); // bonfida

子域名查找

为了解析一个子域名，你需要：

1. 域名的密钥
2. 域名的密钥
3. 检索账户信息

Press </> button to view full source

import {
  getHashedName,
  getNameAccountKey,
  NameRegistryState,
  getDNSRecordAddress,
} from "@bonfida/spl-name-service";
import { Connection, clusterApiUrl, PublicKey } from "@solana/web3.js";

async () => {
  const SOL_TLD_AUTHORITY = new PublicKey(
    "58PwtjSDuFHuUkYjH9BYnnQKHfwo9reZhC2zMJv9JPkx"
  );
  const connection = new Connection(clusterApiUrl("mainnet-beta"));

  // Resolution of demo.bonfida.sol

  const parentDomain = "bonfida";
  const subDomain = "demo";

  // Step 1
  const hashedParentDomain = await getHashedName(parentDomain);
  const parentDomainKey = await getNameAccountKey(
    hashedParentDomain,
    undefined,
    SOL_TLD_AUTHORITY
  );

  // Step 2
  const subDomainKey = await getDNSRecordAddress(parentDomainKey, subDomain);

  // Step 3
  const registry = await NameRegistryState.retrieve(connection, subDomainKey);
};

const parentDomain = "bonfida";
const subDomain = "demo";

// Step 1
const hashedParentDomain = await getHashedName(parentDomain);
const parentDomainKey = await getNameAccountKey(
  hashedParentDomain,
  undefined,
  SOL_TLD_AUTHORITY
);

// Step 2
const subDomainKey = await getDNSRecordAddress(parentDomainKey, subDomain);

// Step 3
const registry = await NameRegistryState.retrieve(connection, subDomainKey);

查找由公钥拥有的所有域名

你可以通过使用带有memcmp过滤器的getProgramAccounts请求来检索钱包的所有域名。

Press </> button to view full source

import { Connection, PublicKey } from "@solana/web3.js";
import { NAME_PROGRAM_ID } from "@bonfida/spl-name-service";

export async function findOwnedNameAccountsForUser(
  connection: Connection,
  userAccount: PublicKey
): Promise<PublicKey[]> {
  const filters = [
    {
      memcmp: {
        offset: 32,
        bytes: userAccount.toBase58(),
      },
    },
  ];
  const accounts = await connection.getProgramAccounts(NAME_PROGRAM_ID, {
    filters,
  });
  return accounts.map((a) => a.publicKey);
}

export async function findOwnedNameAccountsForUser(
  connection: Connection,
  userAccount: PublicKey
): Promise<PublicKey[]> {
  const filters = [
    {
      memcmp: {
        offset: 32,
        bytes: userAccount.toBase58(),
      },
    },
  ];
  const accounts = await connection.getProgramAccounts(NAME_PROGRAM_ID, {
    filters,
  });
  return accounts.map((a) => a.publicKey);
}

解析一个Twitter用户名

Twitter用户名可以在 [Solana名称服务上注册](https://naming.bonfida.org/#/twitter-registration 并可以像.SOL域名一样使用。

Press </> button to view full source

import { PublicKey, clusterApiUrl, Connection } from "@solana/web3.js";
import { getHandleAndRegistryKey } from "@bonfida/spl-name-service";

async () => {
  const connection = new Connection(clusterApiUrl("mainnet-beta"));
  // Pubkey of the wallet you want to retrieve the Twitter handle
  const pubkey = new PublicKey("FidaeBkZkvDqi1GXNEwB8uWmj9Ngx2HXSS5nyGRuVFcZ");

  const [handle, registryKey] = await getHandleAndRegistryKey(
    connection,
    pubkey
  );
};

// Pubkey of the wallet you want to retrieve the Twitter handle
const pubkey = new PublicKey("FidaeBkZkvDqi1GXNEwB8uWmj9Ngx2HXSS5nyGRuVFcZ");

const [handle, registryKey] = await getHandleAndRegistryKey(connection, pubkey);

Twitter用户名的反向查找

为了找到与Twitter用户名相关联的SOL地址，你可以进行反向查找。

Press </> button to view full source

import { getTwitterRegistry } from "@bonfida/spl-name-service";
import { Connection, clusterApiUrl } from "@solana/web3.js";

async () => {
  const handle = "bonfida";
  const connection = new Connection(clusterApiUrl("mainnet-beta"));

  const registry = await getTwitterRegistry(connection, handle);
};

const handle = "bonfida";

const registry = await getTwitterRegistry(connection, handle);