1. Always Use Metadata

Include identifying information to correlate payments with your system:

const payment = await client.createPayment({
  type: 'transfer',
  // ... other fields
  metadata: {
    orderId: 'ORD-12345',
    userId: 'user_abc',
    productId: 'prod_xyz',
    environment: process.env.NODE_ENV,
  },
});