Web3 Name SDK

Overview

The primary capabilities of the SDK include:

1. Domain Name Resolution: It resolves Domain Names and Payment IDs to obtain essential information about the domain, including its associated crypto address, various records (such as avatars, IPFS links, social data), and metadata, etc.

2. Reverse Resolution: The SDK facilitates reverse address resolution. This feature makes it possible to determine the Primary Domain Name associated with a given crypto address, across different blockchains or TLDs.

By default, all EVM-based Domain Names are supported for domain resolution in the Web3 Name SDK. Reverse resolution returns a Chain Primary Name for each EVM chain. Project administrators have the flexibility to choose whether to integrate support for all or only specific chains and TLDs. They can also configure custom settings for reverse resolution as needed. This adaptability allows projects to tailor the SDK's functionality to their specific requirements.

Get Started

Developers can integrate the resolution of web3 domain name <> crypto address using the Web3 Name SDK with zero configuration.

Install

npm install @web3-name-sdk/core viem@^2.23.12

If you are using next.js, please add the following configuration in your next.config.js in order to transpile commonjs dependencies:

const nextConfig = {
  transpilePackages: ['@web3-name-sdk/core'],
}

1. Setup client

import { createWeb3Name } from '@web3-name-sdk/core'

const web3name = createWeb3Name()

2. Resolve a domain name

You can get address from domain name with a single request:

const address = await web3name.getAddress('spaceid.bnb')
// expect: '0xb5932a6b7d50a966aec6c74c97385412fb497540'

const address = await web3name.getAddress('vitalik.eth')
// expect: '0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045'

const address = await web3name.getAddress('beresnev.crypto')
// expect: '0x6ec0deed30605bcd19342f3c30201db263291589'

const address = await web3name.getAddress('bts_official.lens')
// expect: '0xd80efa68b50d21e548b9cdb092ebc6e5bca113e7'

Multichain address resolution

Domain resolution for other chains can be provided by adding coinType param to getAddress().

import { convertEVMChainIdToCoinType } from '@ensdomains/address-encoder'
const address = await web3name.getAddress('gnome.gno', {coinType: convertEVMChainIdToCoinType(1)})
// expect: 0x4348d45967552d0176d465170b7375ed22dc627b

3. Resolve an address

There are optional parameters in the method to select your target chain or TLD (top-level Domain).

By providing chain IDs, you can resolve addresses on selected chains and get an available domain name from all TLDs deployed on these chains.

// Resolve an address from BNB Chain
const name = await web3name.getDomainName({
  address: '0xb5932a6b7d50a966aec6c74c97385412fb497540',
  queryChainIdList: [56],
})
// expect: spaceid.bnb

By providing TLDs, address can be resolved from the selected TLDs and get an available TLD primary name.

// Resolve an address from .bnb TLD
const name = await web3name.getDomainName({
  address: '0xb5932a6b7d50a966aec6c74c97385412fb497540',
  queryTldList: ['bnb'],
})
// expect: spaceid.bnb

4. Batch resolve addresses

You need to provide your target chain client and then provide optional parameters in the method. The method returns a list containing the address and its corresponding domain.

const res = await web3Name.batchGetDomainNameByTld({
  addressList: ['0x2886d6792503e04b19640c1f1430d23219af177f', '0xb5932a6b7d50a966aec6c74c97385412fb497540'],
  queryTld: 'bnb',
})
// expect: [{address: '0x2886d6792503e04b19640c1f1430d23219af177f', domain: 'goodh.bnb'}, {address: '0xb5932a6b7d50a966aec6c74c97385412fb497540', domain: 'spaceid.bnb'}]
const res = await web3Name.batchGetDomainNameByChainId({
  addressList: ['0x77777775b611f0f3d90ccb69ef425a62b35afa7c', '0x3506fbe85e19bf025b228ec58f143ba342c3c608'],
  queryChainId: 42_161,
})
// expect: [{address: '0x77777775b611f0f3d90ccb69ef425a62b35afa7c', domain: 'megantrhopus.arb'}, {address: '0x3506fbe85e19bf025b228ec58f143ba342c3c608', domain: 'idgue.arb'}]

5. Record

Domain text records can be fetched by providing domain name and the key. For example, the avatar record of spaceid.bnb is returned from this method given key name avatar:

const record = await sid.getDomainRecord({ name: 'spaceid.bnb', key: 'avatar' })

6. Metadata

Domain metadata can be fetched by SDK directly.

// requesting
const metadata = await web3Name.getMetadata({ name: 'public.gno' })

Payment ID Domains Support

Web3 Name SDK also supports the Payment ID domains (using @tld format) identifiers that map to addresses across multiple networks. It can simplify transactions by allowing users to send funds to easy-to-remember names.

const address = await web3name.getAddress('jerry@binance')
const ethereumAddress = await web3name.getAddress('jerry@binance', { chainId: 1 })
// Returns the EVM address (chain ID 1) 0xa8aa200ce9dfe97deadd7cc3f197c6d8c242f2ee associated with the PaymentID domain

Chain ID Table for PaymentID Resolution

When resolving PaymentID domains, you can specify a chainId parameter to get addresses for specific blockchains:

Type	ID
Bitcoin	0
EVM	1
Solana	2
Tron	3
Aptos	4
Sui	5

// Example: Get Bitcoin address from PaymentID domain
const bitcoinAddress = await web3name.getAddress('username@paymentid', { chainId: 0 })

// Example: Get Solana address from PaymentID domain
const solanaAddress = await web3name.getAddress('username@paymentid', { chainId: 2 })

Non-EVM name services

As an all-in-one domain name SDK, non-EVM web3 domain name services are also included. Now we support SNS (Solana Name Service, .sol), Sei Name Service (.sei) and Injective Name Service (.inj).

1. Solana Name Service (.sol)

Install additional corresponding dependencies for the Solana environment:

npm install @solana/web3.js@^1.75.0 @bonfida/spl-name-service@^3.0.10

Create client and query domains:

import { createSolName } from '@web3-name-sdk/core/solName'

const web3Name = createSolName()
const domain = await web3Name.getDomainName({
  address: 'HKKp49qGWXd639QsuH7JiLijfVW5UtCVY4s1n2HANwEA',
}) // expect: bonfida.sol

2. Sei Name Service (.sei)

Install additional corresponding dependencies for the Sei environment:

npm install @sei-js/core@^3.1.0 @siddomains/sei-sidjs@^0.0.4

Create client and query domains:

import { createSeiName } from '@web3-name-sdk/core/seiName'

const web3Name = createSeiName()
const domain = await web3Name.getDomainName({
  address: 'sei1tmew60aj394kdfff0t54lfaelu3p8j8lz93pmf',
}) // expect: allen.sei

3. Injective Name Service (.inj)

Install additional corresponding dependencies for the Injective environment:

npm install @siddomains/[email protected] @injectivelabs/[email protected] @injectivelabs/[email protected]

Create client and query domains:

import { createInjName } from '@web3-name-sdk/core/injName'

const web3Name = createInjName()
const domain = await web3Name.getDomainName({
  address: 'inj10zvhv2a2mam8w7lhy96zgg2v8d800xcs7hf2tf',
}) // expect: testtest.inj

Note: Next.js Configuration for INJ and SEI Name Services

When using INJ or SEI name services with Next.js, you'll need additional webpack configuration to handle dynamic imports and polyfills. Due to the complexity of these dependencies, extra configuration is required.

Required dependencies:

npm install crypto-browserify stream-browserify buffer babel-loader @babel/preset-env @babel/plugin-transform-private-methods @babel/plugin-transform-private-property-in-object @babel/plugin-transform-runtime

View the complete Next.js configuration example: next.config.example.js

Use your own RPC

We are using popular public RPC services by default to make it easier to use. But in some cases developers may prefer to use arbitrary RPC, so we provide optional parameter rpcUrl for each function that allows developers to use their own RPC to make requests.

For example, you can put custom rpcUrl as a parameter in getAddress function.

// Use custom RPC url (https://arb1.arbitrum.io/rpc)
const address = await web3name.getAddress('registry.arb', {
  rpcUrl: 'https://arb1.arbitrum.io/rpc',
})
// expect: '0x8d27d6235d9d8EFc9Eef0505e745dB67D5cD2918'

For other functions, it's also possible to have a custom rpcUrl in the request.

// Use custom RPC url (https://arb1.arbitrum.io/rpc)
const address = await web3name.getMetaData('registry.arb', {
  rpcUrl: 'https://arb1.arbitrum.io/rpc',
})
// expect: '0x8d27d6235d9d8EFc9Eef0505e745dB67D5cD2918'

Request Timeout Control

The SDK provides timeout control for all network requests. You can set timeouts in two ways:

1. Global Timeout

Set a global timeout when creating the client:

// Set a 5-second timeout for all requests
const web3Name = createWeb3Name({ timeout: 5000 })
const solName = createSolName({ timeout: 5000 })
const seiName = createSeiName({ timeout: 5000 })
const injName = createInjName({ timeout: 5000 })

2. Function Request Timeout

Override the global timeout for specific requests:

// Set a 10-second timeout for this specific request
const address = await web3name.getAddress('vitalik.eth', { timeout: 10000 })

// Timeout can be combined with other options
const address = await web3name.getAddress('registry.arb', {
  rpcUrl: 'https://arb1.arbitrum.io/rpc',
  timeout: 5000,
})

// Works with all methods
const name = await web3name.getDomainName({
  address: '0x2886D6792503e04b19640C1f1430d23219AF177F',
  queryChainIdList: [10200],
  timeout: 5000,
})

const metadata = await web3name.getMetadata({
  name: 'spaceid.bnb',
  timeout: 5000,
})

If a request exceeds the timeout duration, it will throw an error with a message indicating the timeout. The timeout applies to all network operations, including name resolution, reverse lookups, and metadata fetches.