Sign a message

signMessage: (message: Uint8Array) => Promise<Uint8Array>;

import {useSolanaWallets, useSignMessage} from '@privy-io/react-auth/solana';
import bs58 from 'bs58';

const {wallets} = useSolanaWallets();
const {signMessage} = useSignMessage();

const message = 'Hello world';
const signatureUint8Array = await signMessage({
  message: new TextEncoder().encode(message),
  // Optional: Specify the wallet to use for signing. If not provided, the first wallet will be used.
  options: {
    address: wallets[0].address
  }
});
const signature = bs58.encode(signatureUint8Array);

import {useEmbeddedSolanaWallet} from '@privy-io/expo';

const wallet = useEmbeddedSolanaWallet();
const provider = await wallet.getProvider();

const message = 'Hello world';
const {signature} = await provider.request({
  method: 'signMessage',
  params: {message}
});

signMessage: (message: string, options: {uiOptions: SignMessageModalUIOptions; address?: string}) =>
  Promise<{signature: string}>;

const {signature, encoding} = await privy.walletApi.solana.signMessage({
  walletId: 'insert-wallet-id',
  message: 'Hello world'
});