Execute complex DeFi operations seamlessly by building transaction data and sending it with your wallet signer. The SDK handles transaction building, gas estimation, and execution automatically.
The zap method combines transaction building and execution into a single, streamlined operation. This approach simplifies complex DeFi workflows while maintaining full control over transaction parameters.
Before executing zaps, tokens typically require approval to allow the DZap contracts to spend them on your behalf. Learn more about gas-optimized approval mechanisms in the Approval Mechanisms section.

​
Zap Execution

Execute a zap using the zap method: 
import { DZapClient, ZapBuildTxnRequest, ZapTransactionStep } from "@dzap/sdk";

const dZap = DZapClient.getInstance();

const zapRequest: ZapBuildTxnRequest = {
  srcChainId: 1,
  destChainId: 1,
  account: userAccount,
  srcToken: "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48", // USDC
  destToken: "0x724dc807b04555b71ed48a6896b6F41593b8C637", // Protocol-specific token
  amount: "1000000000", // 1000 USDC
  recipient: userAccount,
  refundee: userAccount,
  slippage: 1.0,
};

// Option 1: Build and execute in one call

const result = await dZap.zap({
  request: zapRequest,
  signer: signer,
});

if (result.status === "success") {
  console.log("Zap executed successfully:", result.txnHash);
} else {
  console.error("Zap execution failed:", result.errorMsg);
}

// Option 2: Build steps first, then execute

let buildResponse: ZapBuildTxnResponse;
try {
  buildResponse = await dZap.buildZapTxn(zapRequest);
} catch (error) {
  console.error("Zap build failed:", error);
  return;
}

console.log("Build response:");
console.log(`Expected output: ${buildResponse.amountOut}`);
console.log(`Number of executable steps: ${buildResponse.steps.length}`);
console.log(`Number of path steps: ${buildResponse.path.length}`);

// Execute with pre-built steps
const txnResponse = await dZap.zap({
  request: zapRequest,
  steps: buildResponse.steps,
  signer: signer,
});

if (txnResponse.status === "success") {
  console.log("Zap executed successfully:", txnResponse.txnHash);
} else {
  console.error("Zap execution failed:", txnResponse.errorMsg);
}

​
Parameters

The zap function expects an object with these parameters:

​
Required Parameters

ParameterTypeRequiredDescription
requestZapBuildTxnRequestyesThe zap build request containing operation parameters
signerSigner | WalletClientyesEthers signer or viem wallet client for transaction execution
stepsZapTransactionStep[]noPre-built transaction steps (if not provided, will build from request)

​
ZapBuildTxnRequest Structure

ParameterTypeRequiredDescription
srcChainIdnumberyesSource chain ID
destChainIdnumberyesDestination chain ID
accountHexStringyesUser account address
srcTokenHexStringyesSource token address
destTokenHexStringyesDestination token/protocol address
amountstringyesAmount to zap (in token units)
recipientHexStringyesAddress to receive the result
refundeeHexStringyesAddress to receive refunds
slippagenumberyesSlippage tolerance percentage
permitDatastringnoPre-signed permit data for gasless approvals
estimateGasbooleannoWhether to estimate gas for the transaction
positionDetailsZapRouteRequestPositionDetailsnoPosition-specific details for liquidity positions
poolDetailsZapRouteRequestPoolDetailsnoPool-specific details for liquidity pool operations
allowedBridgesstring[]noArray of allowed bridge protocols for cross-chain operations
allowedDexesstring[]noArray of allowed DEX protocols for swapping operations

​
Additional Type Definitions

type ZapRouteRequestPositionDetails = {
  nftId: string; // NFT ID for existing liquidity positions
};

type ZapRouteRequestPoolDetails = {
  lowerTick: number; // Lower tick for liquidity range
  upperTick: number; // Upper tick for liquidity range
  metadata?: unknown; // Additional pool metadata, sent in quotes response
};

​
Complete Example with Quotes and Approvals

Here’s a full example that gets quotes, handles approvals, and executes a zap: 
import { DZapClient, Services } from "@dzap/sdk";
import {
  ZapQuoteRequest,
  ZapBuildTxnRequest,
  ApprovalModes,
  PermitTypes,
} from "@dzap/sdk";

const dZap = DZapClient.getInstance();

// Step 1: Get zap quote
const quoteRequest: ZapQuoteRequest = {
  srcChainId: 42161, // Arbitrum
  destChainId: 42161,
  account: userAccount,
  srcToken: "0xaf88d065e77c8cC2239327C5EDb3A432268e5831", // USDC on Arbitrum
  destToken: "0x724dc807b04555b71ed48a6896b6F41593b8C637", // Aave USDC
  amount: "1000000", // 1 USDC
  recipient: userAccount,
  slippage: 1,
};

const zapQuote = await dZap.getZapQuote(quoteRequest);
console.log("Zap quote received");
console.log("Expected output:", zapQuote.amountOut);
console.log("Path steps:", zapQuote.path);

// Step 2: Handle approvals
const tokens = [
  {
    address: "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    amount: BigInt("1000000"),
  },
];

// Check current allowances
const allowanceCheck = await dZap.getAllowance({
  chainId: 42161,
  sender: userAccount,
  spender: zapQuote.approvalData?.approveTo,
  tokens: tokens,
  service: Services.trade,
  mode: ApprovalModes.AutoPermit, // Automatically selects optimal approval method
});

console.log("Allowance check:", allowanceCheck.data);

let permitData: string | undefined;

// Handle approvals if needed
const isApprovalNeeded =
  allowanceCheck.data[quotesRequest.srcToken].approvalNeeded;

const isSignatureNeeded =
  allowanceCheck.data[quotesRequest.srcToken].signatureNeeded;

if (isApprovalNeeded) {
  await dZap.approve({
    chainId: 42161,
    signer: signer,
    sender: userAccount,
    tokens: tokens,
    service: Services.trade,
    mode: ApprovalModes.AutoPermit, // Uses optimal approval strategy
    approvalTxnCallback: async ({ txnDetails, address }) => {
      console.log(`Approval for ${address}:`, txnDetails);
    },
  });

  console.log("Approvals completed");
}

// Handle permit signatures if possible (gasless)
if (isSignatureNeeded) {
  const signatures = await dZap.sign({
    chainId: 42161,
    sender: userAccount,
    tokens: tokens.map((t) => ({
      address: t.address,
      amount: t.amount.toString(),
    })),
    signer: signer,
    spender: zapQuote.approvalData?.approveTo,
    service: Services.trade,
    permitType: PermitTypes.AutoPermit, // Automatically selects optimal permit type
    signatureCallback: async (res) => {
      permitData = res.permitData;
    },
  });
  permitData = signatures.data;
  console.log("Permits signed");
}

// Step 3: Build zap request
const request: ZapBuildTxnRequest = {
  srcChainId: 42161,
  destChainId: 42161,
  account: userAccount,
  srcToken: "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
  destToken: "0x724dc807b04555b71ed48a6896b6F41593b8C637",
  amount: "1000000",
  recipient: userAccount,
  refundee: userAccount,
  slippage: 1,
  permitData, // Include permit data if available
};

// Step 4: Execute zap
const zapResult = await dZap.zap({
  request: request,
  signer: signer,
});

if (zapResult.status === "success") {
  console.log("Zap completed successfully!");
  console.log("Transaction hash:", zapResult.txnHash);
} else {
  console.error("Zap failed:", zapResult.errorMsg);
}

​
Best Practices

  1. Always get quotes first to understand the expected outcome and fees
  2. Validate balances before execution to ensure sufficient funds
  3. Check allowances and execute approvals/permits if needed
  4. Implement proper error handling with retry logic for failed zaps
  5. Use appropriate slippage settings based on market conditions and complexity
  6. Monitor transaction status for zap completion and position updates

​
Next Steps

Always ensure users have sufficient balance for both the zap amount and gas fees before execution. Zap operations can be complex and may require multiple transactions.
Use the buildZapTxn method first to understand the steps involved before executing. This helps with user experience and debugging complex zap operations.