const { Wallet } = require('ethers');

// This is the verifying contract address for Arbitrum from the documentation
const HYPERLIQUID_EXCHANGE_ADDRESS = '0xaf88d065e77c8cC2239327C5EDb3A432268e5831';
const HYPERLIQUID_CHAIN_ID = 1337;

async function sign() {
    const [,, privateKey, typedDataJson] = process.argv;

    if (!privateKey || !typedDataJson) {
        console.error('Usage: node sign.js <privateKey> <typedDataJson>');
        process.exit(1);
    }

    try {
        const wallet = new Wallet(privateKey);
        const typedData = JSON.parse(typedDataJson);

        const domain = {
            name: 'Hyperliquid Exchange',
            version: '1',
            chainId: HYPERLIQUID_CHAIN_ID,
            verifyingContract: HYPERLIQUID_EXCHANGE_ADDRESS,
        };

        const signature = await wallet.signTypedData(
            domain,
            typedData.types,
            typedData.message
        );

        console.log(signature);
    } catch (error) {
        console.error('Error signing payload:', error);
        process.exit(1);
    }
}

sign();