Advanced Usage - NameMatcha

List Name Services

To list all registered name services, you can call the listServices method. Here's an example:

index.ts

import nameMatcha from '@leapwallet/name-matcha'
 
const services = nameMatcha.listServices()
// ['icns', 'ibcDomains', 'stargazeNames', 'archIds', 'spaceIds', 'sns', 'nibId']

Custom Name Services

This library allows you to define and register your own name services.

Defining a Name Service

A name service is a class that implements the NameService interface. Here's an example of ICNS2 name service:

icns2.ts

import { decode } from 'bech32'
import {
  AllowedTopLevelDomains,
  MatchaError,
  MatchaErrorType,
  NameService,
  Network,
  RpcURLs
} from '@leapwallet/name-matcha'
 
const rpcUrls = {
  mainnet: 'https://rpc.cosmos.directory/osmosis',
  testnet: 'https://rpc-test.osmosis.zone'
}
 
// make sure this is unique
export const serviceID = 'icns2'
 
export class ICNS2 extends NameService {
  serviceID = serviceID
  chain = 'osmosis'
  contractAddress = {
    mainnet: 'osmo1xk0s8xgktn9x5vwcgtjdxqzadg88fgn33p8u9cnpdxwemvxscvast52cdd',
    testnet: 'osmo1q2qpencrnnlamwalxt6tac2ytl35z5jejn0v4frnp6jff7gwp37sjcnhu5'
  }
 
  async resolve(
    name: string,
    network: Network,
    options?: {
      allowedTopLevelDomains?: AllowedTopLevelDomains
      rpcUrls?: RpcURLs
    }
  ): Promise<string> {
    const client = await this.getCosmWasmClient(
      options?.rpcUrls?.[serviceID]?.[network] ?? rpcUrls[network]
    )
 
    const [username, prefix] = name.split('.')
    // place your logic here
    try {
      const res = await client?.queryContractSmart(
        this.contractAddress[network],
        {
          address: {
            name: username,
            bech32_prefix: prefix
          }
        }
      )
      if (
        !res?.address ||
        allowedTopLevelDomains?.icns?.indexOf(prefix) === -1
      ) {
        throw new MatchaError('', MatchaErrorType.NOT_FOUND)
      }
      return res.address
    } catch (e) {
      throw new MatchaError('', MatchaErrorType.NOT_FOUND)
    }
  }
 
  async lookup(address: string, network: Network, options?: {
    rpcUrls?: RpcURLs
  }): Promise<string> {
    const client = await this.getCosmWasmClient(
      options?.rpcUrls?.[serviceID]?.[network] ?? rpcUrls[network]
    )
 
    const { prefix } = decode(address)
    // place your logic here
    try {
      const res = await client?.queryContractSmart(
        this.contractAddress[network],
        {
          primary_name: {
            address
          }
        }
      )
      if (!res?.name) {
        throw new MatchaError('', MatchaErrorType.NOT_FOUND)
      }
      return `${res.name}.${prefix}`
    } catch (e) {
      throw new MatchaError('', MatchaErrorType.NOT_FOUND)
    }
  }
}

The this.getCosmWasmClient method is a helper method that returns a CosmWasmClient instance. It is built into the NameService abstract class so you can use it in your own name service. Everything is taken care of for you.

Registering a Name Service

To register a name service, you need to call the registerNameService method. Here's an example:

index.ts

import nameMatcha, { services } from '@leapwallet/name-matcha'
 
import { ICNS2, serviceID as icns2Id } from './icns2'
 
// add the service ID to the services object
const allServices = {
  // built-in services
  ...services,
  // your custom icns2 service
  [icns2Id]: icns2Id
}
 
nameMatcha.registerNameService(new ICNS2())

Usage