Gasless

import { DZapClient, ApprovalModes } from '@dzapio/sdk';
import { createWalletClient, http } from 'viem';
import { arbitrum } from 'viem/chains';

const dzap = DZapClient.getInstance();

const walletClient = createWalletClient({
  account: '0xYourAddress',
  chain: arbitrum,
  transport: http(),
});

// 1. Check if token supports EIP-2612 permit (preferred for gasless)
const { data } = await dzap.getAllowance({
  chainId: 42161,
  sender: '0xYourAddress',
  tokens: [{ address: '0xaf88...', amount: 1_000_000n }],
  service: 'swap',
  mode: ApprovalModes.EIP2612Permit,  // Default: EIP-2612 reduces security risk vs unlimited approval
});

// 2. Sign permit if supported (no gas required)
if (data['0xaf88...'].type === 'eip2612') {
  const { data: permits } = await dzap.sign({
    chainId: 42161,
    sender: '0xYourAddress',
    tokens: [{ address: '0xaf88...', amount: '1000000' }],
    service: 'swap',
    signer: walletClient,
  });
  // Use permits['0xaf88...'].permitData in tradeGasless
}

// 3. Get gasless quote
const quotes = await dzap.getTradeQuotes({
  gasless: true,
  fromChain: 42161,
  account: '0xYourAddress',
  data: [{
    amount: '1000000',
    srcToken: '0xaf88d065e77c8cC2239327C5EDb3A432268e5831',
    destToken: '0x82aF49447D8a07e3bd95BD0d56f35241523fBab1',
    slippage: 1,
  }],
});

// 4. Execute gasless trade
const result = await dzap.tradeGasless({
  request: {
    integratorId: 'dzap',
    fromChain: 42161,
    sender: '0xYourAddress',
    refundee: '0xYourAddress',
    gasless: true,
    data: [{
      amount: '1000000',
      srcToken: '0xaf88...',
      destToken: '0x82aF...',
      srcDecimals: 6,
      destDecimals: 18,
      selectedRoute: quotes[0].protocol,
      recipient: '0xYourAddress',
      slippage: 1,
    }],
  },
  signer: walletClient,
});

// Check with Default mode for standard approval
const { data } = await dzap.getAllowance({
  chainId: 42161,
  sender: '0xYourAddress',
  tokens: [{ address: '0xaf88...', amount: 1_000_000n }],
  service: 'swap',
  mode: ApprovalModes.Default,
});

// Approve if needed
if (data['0xaf88...'].allowance < 1_000_000n) {
  await dzap.approve({
    chainId: 42161,
    signer: walletClient,
    sender: '0xYourAddress',
    tokens: [{ address: '0xaf88...', amount: 1_000_000n }],
    service: 'swap',
    mode: ApprovalModes.Default,
  });
}

const quotes = await dzap.getTradeQuotes({
  gasless: true,
  fromChain: 42161,
  account: '0xYourAddress',
  data: [{
    amount: '1000000',
    srcToken: '0xaf88d065e77c8cC2239327C5EDb3A432268e5831',
    destToken: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913',
    toChain: 8453,
    slippage: 1,
  }],
});

const result = await dzap.tradeGasless({
  request: {
    integratorId: 'dzap',
    fromChain: 42161,
    sender: '0xYourAddress',
    refundee: '0xYourAddress',
    gasless: true,
    data: [{
      amount: '1000000',
      srcToken: '0xaf88...',
      destToken: '0x8335...',
      toChain: 8453,
      srcDecimals: 6,
      destDecimals: 6,
      selectedRoute: quotes[0].protocol,
      recipient: '0xYourAddress',
      slippage: 1,
    }],
  },
  signer: walletClient,
});

const result = await dzap.tradeGasless({
  request: {
    fromChain: 42161,
    sender: '0xYourAddress',
    refundee: '0xYourAddress',
    gasless: true,
    hasPermit2ApprovalForAllTokens: true,  // Skip approval check
    data: [{
      amount: '1000000',
      srcToken: '0xaf88...',
      destToken: '0x82aF...',
      srcDecimals: 6,
      destDecimals: 18,
      selectedRoute: 'uniswap',
      recipient: '0xYourAddress',
      slippage: 1,
    }],
  },
  signer: walletClient,
});