Gasless Intents

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

const dzap = DZapClient.getInstance();
const walletClient = createWalletClient({ account: '0xUser', chain: arbitrum, transport: http() });

// 1. Get quote (returns intent body + hashes)
const quote = await dzap.getZapQuote({
  srcChainId: 42161,
  destChainId: 8453,
  account: '0xUser',
  srcToken: '0xaf88...',
  destToken: '0x4200000000000000000000000000000000000006',
  amount: '100000000',
  recipient: '0xUser',
  refundee: '0xUser',
  slippage: 1,
});

// 2. Sign the intent (no gas)
const signature = await signGaslessDzapUserIntent({
  chainId: 42161,
  spender: dzap.getDZapContractAddress(42161),
  account: '0xUser',
  signer: walletClient,
  txType: 'swapBridge',
  txId: quote.txId,
  executorFeesHash: quote.executorFeesHash,
  swapDataHash: quote.swapDataHash,
  contractVersion: 'v1',
});

// 3. Submit signature + intent to the relay
await fetch('https://zap.dzap.io/v1/bundle', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    intent: quote,
    signature,
  }),
});