signTransaction

Signing Transaction (signMessage)

The signMessage function allows you to request the user's Lazor Kit wallet to sign an arbitrary message or instruction. This is useful for off-chain authentication, message validation, or transaction approval.

Usage

import { useWallet } from '@lazorkit/wallet';
import { Connection } from '@solana/web3.js';

const connection = new Connection('https://api.devnet.solana.com');
const { signMessage } = useWallet(connection);

// Sign a base64-encoded instruction
async function handleSignInstruction() {
  // Suppose you have a base64 string representing the instruction
  const base64Instruction = '...';
  try {
    const signature = await signMessage(base64Instruction);
    console.log('Signature :', signature);
    // You can forward the signature to your backend or verify it on-chain
  } catch (err) {
    console.error('Signing failed:', err);
  }
}

• Input: Pass the instruction as a Uint8Array. If you have a base64 string, decode it to bytes as shown above.

• Returns: A Promise<Uint8Array> containing the signature.

Note: The user must be connected before calling signMessage. Handle errors appropriately for the best user experience.