Batch Payments

Process multiple payments in a single transaction for gas optimization

Overview

Batch payments enable you to process multiple payment requests efficiently in a single blockchain transaction, reducing gas costs and simplifying multi-recipient workflows.

Two Types of Batch Payments:

Batch Pay Invoices

Process previously created requests using their request IDs and receive payment calldata that can be executed on-chain to pay multiple requests simultaneously.

Batch Payouts

Submit new payment requests that are immediately processed, creating requests and returning payment calldata in a single API call for instant multi-recipient payments.

Key Benefits

• Gas Efficiency: Significantly reduce transaction costs by batching multiple payments
• Simplified UX: Process up to 200 payments in a single transaction
• Mixed Payment Types: Support ERC20, native tokens, and conversion payments in the same batch
• Atomic Execution: All payments succeed or fail together, ensuring consistency

Single Network Limitation: All requests in a batch must be on the same blockchain network.

Batch Processing Limits

The theoretical limit for batch payments is 100-200 payments per transaction, depending on:

• Payment complexity (ERC20 vs native tokens vs conversions)
• Available block gas limit on the target network
• Smart contract computational requirements

For optimal performance, we recommend starting with smaller batches (10-50 payments) and scaling based on your network conditions.

Batch Payment Workflow

Endpoints

Pay multiple requests in one transaction

Pays multiple payment requests in one transaction by either creating new requests or using existing request IDs. All requests must be on the same network. Supports mixed ERC20, native, and conversion requests.

Endpoint reference: POST /v2/payouts/batch

Implementation Examples

The following examples demonstrate how to implement batch payment calldata execution in your application. The API returns unsigned transaction calldata, and your application sends those transactions on-chain.

Batch Pay Invoices Example

import { ethers } from 'ethers';

// Get unsigned calldata to pay existing requests by their IDs
const batchPayResponse = await fetch('https://api.request.network/v2/payouts/batch', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'x-api-key': 'your-api-key',
    'x-platform-id': 'your-platform-id'
  },
  body: JSON.stringify({
    requestIds: [
      "01e273ecc29d4b526df3a0f1f05ffc59372af8752c2b678096e49ac270416a7cdb",
      "02f384fdd39e5c627e04b1f2e6fd60593783b8863c3c789197f5bd381527b8ecd"
    ],
    payer: "0x2e2E5C79F571ef1658d4C2d3684a1FE97DD30570"
  })
});

const { batchPaymentTransaction, ERC20ApprovalTransactions } = await batchPayResponse.json();

// Your app must implement sending these transactions to the blockchain
const provider = new ethers.providers.Web3Provider(window.ethereum);
const signer = provider.getSigner();

// 1. Handle ERC20 approvals if needed
for (const approval of ERC20ApprovalTransactions) {
  const tx = await signer.sendTransaction(approval);
  await tx.wait();
}

// 2. Send the batch payment transaction
const batchTx = await signer.sendTransaction(batchPaymentTransaction);
await batchTx.wait();

Batch Payouts Example

// Create new requests and process them immediately
const batchPayResponse = await fetch('https://api.request.network/v2/payouts/batch', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'x-api-key': 'your-api-key',
    'x-platform-id': 'your-platform-id'
  },
  body: JSON.stringify({
    requests: [
      {
        payee: "0x6923831ACf5c327260D7ac7C9DfF5b1c3cB3C7D7",
        amount: "10",
        invoiceCurrency: "USD",
        paymentCurrency: "USDC-sepolia"
      },
      {
        payee: "0xb07D2398d2004378cad234DA0EF14f1c94A530e4",
        amount: "25.50",
        invoiceCurrency: "EUR",
        paymentCurrency: "DAI-sepolia"
      }
    ],
    payer: "0x2e2E5C79F571ef1658d4C2d3684a1FE97DD30570"
  })
});

const { batchPaymentTransaction, ERC20ApprovalTransactions } = await batchPayResponse.json();

// Your app must implement the blockchain transaction execution
// (same pattern as Batch Pay Invoices example above)

Supported Payment Types

Batch payments support mixing different payment types in a single transaction:

• ERC20 Token Payments: Standard token transfers
• Native Token Payments: ETH, MATIC, etc.
• Conversion Payments: Requests denominated in one currency but paid in another (e.g., USD invoices paid with USDC)

Key Implementation Notes

Your Responsibility

• API Call: Your application calls the Request Network API to get transaction data
• Blockchain Execution: Your application executes the returned transaction data on the blockchain
• Error Handling: Your application handles transaction failures and retries

Best Practices

1. Validate Addresses: Always validate recipient addresses before submitting batch payments
2. Test on Testnets: Start with small batches on test networks before production deployment
3. Handle Failures Gracefully: Implement proper error handling for transaction failures
4. Gas Estimation: Consider gas costs when determining optimal batch sizes
5. User Experience: Provide clear progress indicators for multi-step approval processes

Error Handling

Common error scenarios and their solutions:

• Network Mismatch: Ensure all requests use the same blockchain network
• Insufficient Funds: Verify payer has sufficient balance for all payments plus gas
• Invalid Addresses: Validate all payee addresses before batch submission
• Gas Limit Exceeded: Reduce batch size if hitting network gas limits

Demo Application

See the batch payment feature in action in our EasyInvoice demo application:

EasyInvoice Batch Pay Invoices

EasyInvoice: Batch Payouts

For detailed information on all available endpoints and their parameters, see the full Request Network API Reference.

For implementation details, see the EasyInvoice source code.