import { sendTransaction } from "thirdweb";
import { addFor } from "thirdweb/extensions/farcaster";
 
const transaction = addFor({
 contract,
 fidOwner: ...,
 keyType: ...,
 key: ...,
 metadataType: ...,
 metadata: ...,
 deadline: ...,
 sig: ...,
 overrides: {
   ...
 }
});
 
// Send the transaction
await sendTransaction({ transaction, account });