Sign a transaction

signTransaction: (input: {
  transaction: SupportedSolanaTransaction;
  wallet: ConnectedStandardSolanaWallet;
  options?: SolanaSignTransactionOptions & {uiOptions?: SendTransactionModalUIOptions};
}) =>
  Promise<{
    signedTransaction: Uint8Array;
  }>;

import {useSignTransaction, useWallets} from '@privy-io/react-auth/solana';
import {pipe, createSolanaRpc, getTransactionEncoder, createTransactionMessage} from '@solana/kit';

// Inside your component
const {signTransaction} = useSignTransaction();
const {wallets} = useWallets();

const selectedWallet = wallets[0];

// Configure your connection to point to the correct Solana network
const {getLatestBlockhash} = createSolanaRpc('https://api.mainnet-beta.solana.com');

// Get the latest blockhash
const {value} = await getLatestBlockhash().send();

// Create your transaction (either legacy Transaction or VersionedTransaction)
const transaction = pipe(
  createTransactionMessage({version: 0}),
  // Set the message fee payer...
  // Set recent blockhash...
  // Add your instructions to the transaction...
  // Finally encode the transaction
  (tx) => new Uint8Array(getTransactionEncoder().encode(tx))
);

// Sign the transaction
const signedTransaction = await signTransaction({
  transaction: transaction,
  wallet: selectedWallet
});

console.log('Transaction signed successfully');