Sign a transaction

When using Privy’s server-side SDKs to sign transactions, you can use the authorization context to automatically sign requests. Learn more about signing on the server.

React

Use the signTransaction method exported from the useSignTransaction hook to sign a transaction with a Solana wallet.

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

Usage

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');

Parameters

transaction · Uint8Array · required

The encoded transaction to be signed.

wallet · ConnectedStandardSolanaWallet · required

The Solana wallet to use for signing the transaction.

chain · SolanaChain

Type of all Solana chains supported by Privy.

options · SolanaSignTransactionOptions & {uiOptions?: SendTransactionModalUIOptions}

Additional options for signing the transaction.

Show uiOptions

uiOptions · SendTransactionModalUIOptions

UI options to customize the transaction request modal.

To hide confirmation modals, set options.uiOptions.showWalletUIs to false. Learn more about configuring modal prompts here.

Response

signedTransaction · Uint8Array

The signed transaction that can be sent to the network.