Your First Swap

A complete swap on Arbitrum: 100 USDC → WETH. Copy, paste, run.

Setup

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

const account = privateKeyToAccount(process.env.PRIVATE_KEY as `0x${string}`);

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

const dzap = DZapClient.getInstance();

const USDC = '0xaf88d065e77c8cC2239327C5EDb3A432268e5831';
const WETH = '0x82aF49447D8a07e3bd95BD0d56f35241523fBab1';
const AMOUNT = '100000000';                           // 100 USDC (6 decimals)

Steps

Quote

const quotes = await dzap.getTradeQuotes({
  fromChain: 42161,
  account: account.address,
  data: [{
    srcToken: USDC,
    destToken: WETH,
    amount: AMOUNT,
    slippage: 1,
  }],
});

const best = quotes[0].quotes[0];
console.log(`Best: ${best.protocol}, output ${best.amountOut}`);

Approve (if needed)

const allowance = await dzap.getAllowance({
  chainId: 42161,
  sender: account.address,
  tokens: [{ address: USDC, amount: BigInt(AMOUNT) }],
  service: 'swap',
  mode: ApprovalModes.AutoPermit,
});

const needsApproval = allowance.data[USDC].allowance < BigInt(AMOUNT);

if (needsApproval) {
  await dzap.approve({
    chainId: 42161,
    signer: walletClient,
    sender: account.address,
    tokens: [{ address: USDC, amount: BigInt(AMOUNT) }],
    service: 'swap',
    mode: ApprovalModes.AutoPermit,
  });
}

Trade

const result = await dzap.trade({
  request: {
    fromChain: 42161,
    sender: account.address,
    refundee: account.address,
    data: [{
      srcToken: USDC,
      destToken: WETH,
      amount: AMOUNT,
      protocol: best.protocol,
      recipient: account.address,
      slippage: 1,
    }],
  },
  signer: walletClient,
});

console.log(`Sent: ${result.txnHash}`);

Confirm

const status = await dzap.getTradeTxnStatus({
  txHash: result.txnHash,
  chainId: '42161',
});

console.log(status.status);   // 'completed' once mined

What can go wrong

NO_ROUTE_FOUND — pair is too thin or not yet supported. Try a different amount or token.
SLIPPAGE_TOO_TIGHT — bump slippage from 1 to 2.
Approval fails — make sure your wallet has gas (ETH on Arbitrum).

See Error Codes for the full catalog.

Going further

Cross-chain bridge — same flow with toChain.
Approvals reference — Permit2 vs EIP-2612 vs AutoPermit.
Trade SDK — every method, every option.

​Setup

​Steps

​What can go wrong

​Going further

Setup

Steps

What can go wrong

Going further