Create new Farcaster Account

curl --location 'https://api.neynar.com/v2/farcaster/user/fid' \
--header 'api_key: NEYNAR_API_KEY'

{
	"fid": UNIQUE_FID // UNIQUE_FID is a number
}

yarn add @farcaster/hub-nodejs viem

// generate-required-parameters.js --> Filename

const {
    ID_REGISTRY_ADDRESS,
    ViemLocalEip712Signer,
    idRegistryABI,
} = require('@farcaster/hub-nodejs');
const { bytesToHex, createPublicClient, http } = require('viem');
const { mnemonicToAccount } = require('viem/accounts');
const { optimism } = require('viem/chains');

const publicClient = createPublicClient({
    chain: optimism,
    transport: http(),
});

const FID = 'FID_TO_COLLECT_SIGNATURE_FOR'; // fid returned from GET - /v2/farcaster/user/fid
const MNEMONIC = 'NEW_ACCOUNT_MNEMONIC';

const getDeadline = () => {
    const now = Math.floor(Date.now() / 1000);
    const oneHour = 60 * 60;
    return BigInt(now + oneHour);
};

(async () => {
    const deadline = getDeadline();

    console.log('\ndeadline: ', parseInt(deadline));

    const requestedUserAccount = mnemonicToAccount(MNEMONIC);
    const requestedUserAccountSigner = new ViemLocalEip712Signer(
        requestedUserAccount
    );

    console.log(
        '\nrequested_user_custody_address: ',
        requestedUserAccount.address
    );

    let requestedUserNonce = await publicClient.readContract({
        address: ID_REGISTRY_ADDRESS,
        abi: idRegistryABI,
        functionName: 'nonces',
        args: [requestedUserAccount.address],
    });

    console.log('\nfid: ', parseInt(FID));

    let requestedUserSignature = await requestedUserAccountSigner.signTransfer({
        fid: BigInt(FID),
        to: requestedUserAccount.address,
        nonce: requestedUserNonce,
        deadline,
    });

    console.log(
        '\nsignature: ',
        bytesToHex(requestedUserSignature.value),
        '\n'
    );
})();

curl --location 'https://api.neynar.com/v2/farcaster/signer' \
--header 'api_key: NEYNAR_API_KEY' \
--header 'Content-Type: application/json' \
--data '{}' 

// generate-signed-key-request-metadata-signature.js --> Filename

const { bytesToHex, hexToBytes } = require('viem');
const { mnemonicToAccount } = require('viem/accounts');
const { ViemLocalEip712Signer } = require('@farcaster/core');

(async () => {
  /**_ Get public_key and signer_uuid of the signer _**/
  const signer_uuid = 'bb81ddbb-8c4f-4a61-94ad-6a82fc2e3e6d'; // From CREATE signer API
  const key = '0x900ac01061e15e11d332796e9ebbece5b46afdac4a1b641e82f3e344371433a4'; // From CREATE signer API

  /*** Get account ***/
  const fid = 0; // Your app's FID
  const account = mnemonicToAccount(''); // Your app's Mnemonic

  const signer = new ViemLocalEip712Signer(account);

  /*** Generating a Signed Key Request signature ***/
  const deadline = Math.floor(Date.now() / 1000) + 86400;

  console.log('signer_uuid', signer_uuid);
  console.log('\napp_fid', fid);
  console.log('\ndeadline', deadline);

  const signed_key_request_metadata = await signer.getSignedKeyRequestMetadata({
    requestFid: fid,
    key: hexToBytes(key),
    deadline,
  });

  if (!signed_key_request_metadata.isOk()) {
    console.log('Error getting signed key request metadata');
    return;
  }

  const signed_key_req_metadata_sig = bytesToHex(
    signed_key_request_metadata.value
  );

  console.log('\nsigned_key_req_metadata_sig', signed_key_req_metadata_sig);

})();

yarn add @farcaster/core

curl --location 'https://api.neynar.com/v2/farcaster/user' \
--header 'api_key: NEYNAR_API_KEY' \
--header 'Content-Type: application/json' \
--data '{
	"deadline": "DEADLINE_FROM_SCRIPT",
	"requested_user_custody_address": "CUSTODY_ADDRESS_FROM_SCRIPT",
	"fid": 0,
	"signature": "SIGNATURE_FROM_SCRIPT",
	"fname": "desired-username"
}'

{
	"success": true,
	"message": "Account transferred successfully.",
  	"signer": {
  		"fid": 0,
  		"signer_uuid": "35b0bbd5-4e20-4213-a30c-4183258a73ab",
  		"status": "APPROVED",
  		"public_key": "0x123412341234123412341234123412341234"
  },
  "signers": [
      {
        "fid": 0,
        "signer_uuid": "35b0bbd5-4e20-4213-a30c-4183258a73ab",
        "status": "APPROVED",
        "public_key": "0x123412341234123412341234123412341234"
      },
      {
        "fid": 0,
        "signer_uuid": "9f6efd31-97a7-4fbe-b7e8-259871da8745",
        "status": "APPROVED",
        "public_key": "0x1234123412341234123412332322323232323"
      }
    ]
}