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Resolve identities in an app built with XMTP

When you build with XMTP, there’s no cold start for your app and your users. As soon as your app plugs into the XMTP network, it can reach today’s most popular and meaningful identities. XMTP’s interoperability and composability help ensure that the network can continue to grow and bring messaging to every identity—via your app.

In this context, identity refers to:

  • Wallet addresses, such as raw 0x addresses like 0x4b70d04124c2996De29e0caa050A49822Faec6Cc
  • Human-readable domain names associated with wallet addresses. These domain names are provided by name services, such as Ethereum Name Service (ENS) and Unstoppable Domains (UNS).

As a UX best practice, build your app to enable a user to enter a domain name in the To field and have the identity resolve to its associated raw wallet address. For example, a user should be able to enter gm.xmtp.eth in your To field and have your app forward-resolve and display the identity's associated wallet address 0x937C0d4a6294cdfa575de17382c7076b579DC176.

Your app should also be able to accept a raw wallet address and reverse-resolve and display the identity's associated domain name, if available.

When displaying a name, also look for and display its associated avatar. For example, when displaying a Lens name, look for and display a Lens profile photo. For raw 0x addresses, display blockies as avatars.

Third-party identity resolution tools

This list of third-party identity resolution tools is provided for informational purposes only.

Airstack

Airstack provides tools to resolve Ox, ENS, Lens, and Farcaster identities.

ENSjs

ENSjs provides tools to resolve ENS identities.

SimpleHash

SimpleHash provides tools to resolve ENS and Base Name Service identities.

Unstoppable Domains

Unstoppable Domains provides tools to resolve Unstoppable Domains identities.