import * as ed from '@noble/ed25519';
import { mnemonicToAccount, signTypedData } from 'viem/accounts';
import axios from 'axios';

// Generate a keypair
const privateKey = ed.utils.randomPrivateKey();
const publicKeyBytes = await ed.getPublicKey(privateKey);
const key = '0x' + Buffer.from(publicKeyBytes).toString('hex');

// EIP-712 domain and types for SignedKeyRequest
const SIGNED_KEY_REQUEST_VALIDATOR_EIP_712_DOMAIN = {
  name: 'Farcaster SignedKeyRequestValidator',
  version: '1',
  chainId: 10,
  verifyingContract: '0x00000000fc700472606ed4fa22623acf62c60553',
};

const SIGNED_KEY_REQUEST_TYPE = [
  { name: 'requestFid', type: 'uint256' },
  { name: 'key', type: 'bytes' },
  { name: 'deadline', type: 'uint256' },
];

// Generate a Signed Key Request signature
const appFid = process.env.APP_FID;
const account = mnemonicToAccount(process.env.APP_MNEMONIC);

const deadline = Math.floor(Date.now() / 1000) + 86400; // signature is valid for 1 day
const signature = await account.signTypedData({
  domain: SIGNED_KEY_REQUEST_VALIDATOR_EIP_712_DOMAIN,
  types: {
    SignedKeyRequest: SIGNED_KEY_REQUEST_TYPE,
  },
  primaryType: 'SignedKeyRequest',
  message: {
    requestFid: BigInt(appFid),
    key,
    deadline: BigInt(deadline),
  },
});

// Create a Signed Key Request
const warpcastApi = 'https://api.warpcast.com';
const { token, deeplinkUrl } = await axios
  .post(`${warpcastApi}/v2/signed-key-requests`, {
    key,
    requestFid: appFid,
    signature,
    deadline,
  })
  .then((response) => response.data.result.signedKeyRequest);

console.log('Deep link URL:', deeplinkUrl);
console.log('Open this URL on your mobile device with Warpcast installed to authorize this key');

{
  "mcpServers": {
    "warpcast": {
      "command": "node",
      "args": [
        "/absolute/path/to/mcp-warpcast-server/build/index.js"
      ],
      "env": {
        "WARPCAST_FID": "your_fid_here",
        "WARPCAST_PRIVATE_KEY": "your_private_key_here",
        "WARPCAST_PUBLIC_KEY": "your_public_key_here"
      }
    }
  }
}