LazorKit React SDK

LazorKit allows you to build Passkey-native Solana applications.

Traditionally, crypto requires users to manage complex seed phrases. LazorKit replaces this with the standard biometrics users already know: FaceID, TouchID, or Windows Hello.

Features

• Seedless: Onboard users instantly with Passkeys
• Gasless: Sponsored transactions via Paymaster
• Smart: Programmable account logic (PDAs)
• Secure: Hardware-bound credentials

Installation

npm install @lazorkit/wallet @coral-xyz/anchor @solana/web3.js

Usage

import { LazorkitProvider, useWallet } from '@lazorkit/wallet';
import { SystemProgram, LAMPORTS_PER_SOL, PublicKey } from '@solana/web3.js';

// 1. Wrap App with Provider
export const App = () => (
  <LazorkitProvider
    rpcUrl={process.env.LAZORKIT_RPC_URL}
    portalUrl={process.env.LAZORKIT_PORTAL_URL}
    paymasterConfig={{ paymasterUrl: process.env.LAZORKIT_PAYMASTER_URL }}
  >
    <WalletContent />
  </LazorkitProvider>
);

// 2. Use Hook
function WalletContent() {
  const { connect, signAndSendTransaction, isConnected } = useWallet();

  const handleTx = async () => {
    // Connect (Auto-reconnects)
    if (!isConnected) await connect();

    // Sign and Send
    const sig = await signAndSendTransaction({
      instructions: [
        SystemProgram.transfer({
          fromPubkey: smartWalletPubkey,
          toPubkey: new PublicKey('RECIPIENT'),
          lamports: LAMPORTS_PER_SOL * 0.1
        })
      ],
      transactionOptions: { feeToken: 'USDC' }
    });
    
    console.log("Tx:", sig);
  };

  return <button onClick={handleTx}>Execute Transaction</button>;
}

API Reference

useWallet()

connect()

Connects to the wallet. Auto-reconnects if session exists.

Returns Promise<WalletAccount>

disconnect()

Disconnects the wallet.

Returns Promise<void>

signMessage(message)

Signs a message string key.

Parameters

| Param | Type | Description | |---|---|---| | message | string | Message content |

Returns Promise<{ signature: string, signedPayload: string }>

signAndSendTransaction(payload)

Signs and sends transaction via Paymaster.

Parameters

| Param | Type | Description | |---|---|---| | payload.instructions | TransactionInstruction[] | Instructions | | payload.transactionOptions | object | Optional config | | transactionOptions.feeToken | string | Token address for gas fees (e.g. USDC). | | transactionOptions.computeUnitLimit | number | Max compute units. | | transactionOptions.addressLookupTableAccounts | AddressLookupTableAccount[] | Signup tables for v0 txs. | | transactionOptions.clusterSimulation | 'devnet' \| 'mainnet' | Network for simulation. |

Returns Promise<string> - Transaction signature.