Sign a message

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

// This assumes you have already created a Solana wallet for the user or they have connected one
const {wallets} = useSolanaWallets();

const message = 'Hello world';
const {signature} = await wallets[0].signMessage(new TextEncoder().encode(message));