export interface PaymentParams<Extra = Record<string, unknown>> {
    gateway: string;
    amount: number;
    currency: string;
    returnUrl: string;
    [key: string]: string | number | undefined | Extra;
}
export interface PaymentResult<Params = Record<string, unknown>> {
    gateway: string;
    status: 'success' | 'failure';
    params: Params;
    message?: string;
}
export interface VerifyParams<Extra = Record<string, unknown>> {
    gateway: string;
    transactionId: string;
    amount: number;
    [key: string]: string | number | undefined | Extra;
}
export interface RefundParams<Extra = Record<string, unknown>> {
    gateway: string;
    transactionId: string;
    amount: number;
    [key: string]: string | number | undefined | Extra;
}
export interface SubscriptionParams<Extra = Record<string, unknown>> {
    gateway: string;
    planId: string;
    customerId: string;
    [key: string]: string | number | undefined | Extra;
}
export interface SubscriptionResult<Params = Record<string, unknown>> {
    gateway: string;
    status: 'active' | 'inactive' | 'cancelled';
    params: Params;
    message?: string;
}
export interface InvoiceParams<Extra = Record<string, unknown>> {
    gateway: string;
    amount: number;
    currency: string;
    customerId: string;
    [key: string]: string | number | undefined | Extra;
}
export interface InvoiceResult<Params = Record<string, unknown>> {
    gateway: string;
    status: 'created' | 'paid' | 'cancelled';
    params: Params;
    message?: string;
}
export interface WalletParams<Extra = Record<string, unknown>> {
    gateway: string;
    customerId: string;
    amount: number;
    currency: string;
    [key: string]: string | number | undefined | Extra;
}
export interface WalletResult<Params = Record<string, unknown>> {
    gateway: string;
    status: 'success' | 'failure';
    params: Params;
    message?: string;
}
/**
 * Unified interface for all payment gateways
 */
export interface IPaymentGateway {
    /**
     * Initiate a payment
     */
    pay(params: PaymentParams): Promise<PaymentResult>;
    /**
     * Verify a payment
     */
    verify(params: VerifyParams): Promise<PaymentResult>;
    /**
     * Refund a payment
     */
    refund(params: RefundParams): Promise<PaymentResult>;
    /**
     * Create a subscription (if supported)
     */
    subscribe?(params: SubscriptionParams): Promise<SubscriptionResult>;
    /**
     * Create an invoice (if supported)
     */
    createInvoice?(params: InvoiceParams): Promise<InvoiceResult>;
    /**
     * Wallet operations (if supported)
     */
    wallet?(params: WalletParams): Promise<WalletResult>;
}