🆔Resolve Farcaster Users

Learn how to resolve Farcaster(s) fname/username/FID to 0x address, ENS, and Reverse Resolution.

Airstack provides easy-to-use APIs for enriching Farcaster applications and for integrating onchain and offchain data with Farcaster.

Table Of Contents

In this guide you will learn how to use Airstack to:

• Get All 0x addresses of Farcaster user(s)

• Get All Solana addresses of Farcaster user

• Get Farcaster profiles of a given Solana address

• Get all ENS domains owned by Farcaster user(s)

• Get All Farcaster Accounts owned by 0x address or ENS

Pre-requisites

• An Airstack account

• Basic knowledge of GraphQL

Get Started

JavaScript/TypeScript/Python

If you are using JavaScript/TypeScript or Python, Install the Airstack SDK:

npm

React

npm install @airstack/airstack-react

Node

npm install @airstack/node

yarn

React

yarn add @airstack/airstack-react

Node

yarn add @airstack/node

pnpm

React

pnpm install @airstack/airstack-react

Node

pnpm install @airstack/node

pip

pip install airstack

Then, add the following snippets to your code:

React

import { init, useQuery } from "@airstack/airstack-react";

init("YOUR_AIRSTACK_API_KEY");

const query = `YOUR_QUERY`; // Replace with GraphQL Query

const Component = () => {
  const { data, loading, error } = useQuery(query);

  if (data) {
    return <p>Data: {JSON.stringify(data)}</p>;
  }

  if (loading) {
    return <p>Loading...</p>;
  }

  if (error) {
    return <p>Error: {error.message}</p>;
  }
};

Node

import { init, fetchQuery } from "@airstack/node";

init("YOUR_AIRSTACK_API_KEY");

const query = `YOUR_QUERY`; // Replace with GraphQL Query

const { data, error } = fetchQuery(query);

console.log("data:", data);
console.log("error:", error);

Python

import asyncio
from airstack.execute_query import AirstackClient

api_client = AirstackClient(api_key="YOUR_AIRSTACK_API_KEY")

query = """YOUR_QUERY""" # Replace with GraphQL Query

async def main():
    execute_query_client = api_client.create_execute_query_object(
        query=query)

    query_response = await execute_query_client.execute_query()
    print(query_response.data)

asyncio.run(main())

Other Programming Languages

To access the Airstack APIs in other languages, you can use https://api.airstack.xyz/gql as your GraphQL endpoint.

Get All 0x addresses of Farcaster user(s)

You can resolve an array of Farcaster user(s) to their 0x addresses:

Try Demo

Code

Query

query GetAddressesOfFarcasters {
  Socials(
    input: {
      filter: { identity: { _in: ["fc_fname:dwr.eth", "fc_fid:1"] } }
      blockchain: ethereum
    }
  ) {
    Social {
      userAssociatedAddresses
    }
  }
}

Response

{
  "data": {
    "Socials": {
      "Social": [
        {
          "userAssociatedAddresses": [
            "0x8773442740c17c9d0f0b87022c722f9a136206ed",
            "0x86924c37a93734e8611eb081238928a9d18a63c0"
          ]
        },
        {
          "userAssociatedAddresses": [
            "0xd7029bdea1c17493893aafe29aad69ef892b8ff2"
          ]
        },
        {
          "userAssociatedAddresses": [
            "0xb877f7bb52d28f06e60f557c00a56225124b357f",
            "0xa14b4c95b5247199d74c5578531b4887ca5e4909",
            "0xd7029bdea1c17493893aafe29aad69ef892b8ff2",
            "0x74232bf61e994655592747e20bdf6fa9b9476f79"
          ]
        }
      ]
    }
  }
}

Get All Solana addresses of Farcaster user

You can resolve a Farcaster user to their Solana addresses by using Socials API:

Try Demo

Code

Query

query MyQuery {
  Socials(
    input: {
      filter: { dappName: { _eq: farcaster }, profileName: { _eq: "v" } }
      blockchain: ethereum
    }
  ) {
    Social {
      connectedAddresses {
        address
        blockchain
        chainId
        timestamp
      }
    }
  }
}

Response

{
  "data": {
    "Socials": {
      "Social": [
        {
          "connectedAddresses": [
            {
              "address": "9t92xZy9q5SyfKBH4rZwEDFXjaZKgzj5PgviPhKtBjyy",
              "blockchain": "solana",
              "chainId": "900",
              "timestamp": "2024-02-16T22:13:14Z"
            },
            {
              "address": "0x91031dcfdea024b4d51e775486111d2b2a715871",
              "blockchain": "ethereum",
              "chainId": "1",
              "timestamp": "2023-04-28T17:42:20Z"
            },
            {
              "address": "0x182327170fc284caaa5b1bc3e3878233f529d741",
              "blockchain": "ethereum",
              "chainId": "1",
              "timestamp": "2023-07-26T20:46:33Z"
            }
          ]
        }
      ]
    }
  }
}

Get Farcaster profiles of a given Solana address

You can resolve Solana address to get all the Farcaster profiles owned by the given Solana address by using the Socials API:

Try Demo

Code

Query

query MyQuery {
  Socials(
    input: {
      filter: {
        identity: { _eq: "9t92xZy9q5SyfKBH4rZwEDFXjaZKgzj5PgviPhKtBjyy" }
        dappName: { _eq: farcaster }
      }
      blockchain: ethereum
    }
  ) {
    Social {
      profileName
      fid: userId
      userAssociatedAddresses
    }
  }
}

Response

{
  "data": {
    "Socials": {
      "Social": [
        {
          "profileName": "v",
          "fid": "2",
          "userAssociatedAddresses": [
            "0x4114e33eb831858649ea3702e1c9a2db3f626446",
            "0x91031dcfdea024b4d51e775486111d2b2a715871",
            "0x182327170fc284caaa5b1bc3e3878233f529d741",
            "0xf86a7a5b7c703b1fd8d93c500ac4cc75b67477f0",
            "9t92xZy9q5SyfKBH4rZwEDFXjaZKgzj5PgviPhKtBjyy"
          ]
        }
      ]
    }
  }
}

Get all ENS domains owned by Farcaster user(s)

You can resolve an array of Farcaster user(s) to their ENS domains:

Try Demo

Code

Query

query GetENSOfFarcasters {
  Domains(
    input: {
      filter: { owner: { _in: ["fc_fname:dwr.eth", "fc_fid:1"] } }
      blockchain: ethereum
    }
  ) {
    Domain {
      name
    }
  }
}

Response

{
  "data": {
    "Domains": {
      "Domain": [
        {
          "name": "noun124.eth"
        },
        {
          "name": "dwr.mirror.xyz"
        },
        {
          "name": "warpcast.eth"
        },
        {
          "name": "danromero.eth"
        }
      ]
    }
  }
}

Get All Web3 Social Accounts (Farcaster, Lens) owned by 0x address or ENS

You can resolve any 0x address or ENS to their web3 socials, which comprise of Farcaster and Lens:

Try Demo

Code

Query

query GetWeb3SocialsOfFarcasters {
  Socials(
    input: {
      filter: {
        identity: {
          _in: ["dwr.eth", "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"]
        }
      }
      blockchain: ethereum
    }
  ) {
    Social {
      dappName
      profileName
    }
  }
}

Response

{
  "data": {
    "Socials": {
      "Social": [
        {
          "dappName": "farcaster",
          "profileName": "vbuterin"
        },
        {
          "dappName": "lens",
          "profileName": "lens/@vitalik"
        },
        {
          "dappName": "lens",
          "profileName": "lens/@danromero"
        },
        {
          "dappName": "farcaster",
          "profileName": "dwr.eth"
        }
      ]
    }
  }
}

Developer Support

If you have any questions or need help regarding resolving identities for Farcaster user(s), please join our Airstack's Telegram group.

More Resources

• Resolve Identities

  • Farcaster

  • Solana Address

• Socials API Reference