/**
 * @rajeev02/payments — UPI Module
 * UPI intent, collect request, QR code, autopay mandates
 */
export interface UpiConfig {
    /** Merchant VPA (e.g., merchant@paytm) */
    merchantVpa: string;
    /** Merchant name shown in UPI apps */
    merchantName: string;
    /** Merchant category code */
    mcc?: string;
    /** Transaction reference prefix */
    txnRefPrefix?: string;
}
export interface UpiPaymentRequest {
    /** Amount in INR (paisa precision) */
    amount: number;
    /** Payment description */
    note: string;
    /** Unique transaction reference */
    txnRef?: string;
    /** Customer VPA (for collect requests) */
    customerVpa?: string;
    /** Order ID from your backend */
    orderId: string;
}
export interface UpiPaymentResult {
    success: boolean;
    txnId?: string;
    txnRef?: string;
    responseCode?: string;
    approvalRefNo?: string;
    status: "success" | "failed" | "pending" | "cancelled";
    error?: string;
}
export interface UpiMandateRequest {
    /** Customer VPA */
    customerVpa: string;
    /** Maximum amount per debit */
    maxAmount: number;
    /** Frequency: DAILY, WEEKLY, FORTNIGHTLY, MONTHLY, BIMONTHLY, QUARTERLY, HALFYEARLY, YEARLY */
    frequency: string;
    /** Start date (ISO) */
    startDate: string;
    /** End date (ISO) */
    endDate: string;
    /** Purpose description */
    purpose: string;
}
/**
 * Generate UPI deep link URI for intent-based payment
 * Works with all UPI apps (GPay, PhonePe, Paytm, etc.)
 */
export declare function generateUpiUri(config: UpiConfig, request: UpiPaymentRequest): string;
/**
 * Generate UPI QR code data string
 */
export declare function generateUpiQrData(config: UpiConfig, request: UpiPaymentRequest): string;
/**
 * Validate a UPI VPA format
 * Format: username@psp (e.g., rajeev@paytm, user@okicici)
 */
export declare function validateVpa(vpa: string): boolean;
/**
 * Known UPI PSP handles
 */
export declare const UPI_PSP_HANDLES: Record<string, string>;
export declare function getPspName(vpa: string): string | null;
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