Payment Request Types

interface PaymentRequest {
  paymentId: string;
  amount: string;          // USDC decimal string, e.g. "25.00"
  merchantWallet: string;  // Merchant's on-chain wallet address
  transactionId: string;   // Alias for paymentId (backwards compatibility)
  currency: 'USDC';
  network: 'base';
  timestamp: number;       // Unix timestamp in ms
  expiresAt?: number;      // Unix timestamp in ms
}

interface CreatePaymentRequest {
  amount: string;      // USDC decimal string
  merchantId: string;
}

interface CreatePaymentResponse {
  paymentId: string;
  merchantWallet: string;
  expiresAt: number;  // Unix timestamp in ms
}

interface ProcessPaymentRequest {
  paymentId: string;
  txHash?: string;
  customerWallet?: string;
}

interface ProcessPaymentResponse {
  transactionId?: string;
  status: PaymentStatus;
  confirmedAt?: number;  // Unix timestamp in ms
}

interface PaymentStatusResponse {
  status: PaymentStatus;
  txHash?: string;
  confirmedAt?: number;
  error?: string;
}

interface PayFromPoolRequest {
  payment_id: string;
  customer_id: string;
  amount: string;
}

interface PayFromPoolResponse {
  success: boolean;
  transactionId?: string;
  status: PaymentStatus;
  error?: string;
}