type DocumentType = 'aadhaar' | 'pan' | 'gstin' | 'ifsc' | 'pincode' | 'tan' | 'uan' | 'voter-id' | 'dl' | 'passport' | 'upi' | 'phone' | 'msme';
type FieldLocation = 'body' | 'query' | 'params';
interface FieldRule {
    field: string;
    type: DocumentType;
    location?: FieldLocation;
    optional?: boolean;
    message?: string;
}
interface ValidationError {
    field: string;
    value: unknown;
    message: string;
    type: DocumentType;
}
interface Request {
    body?: Record<string, unknown>;
    query?: Record<string, unknown>;
    params?: Record<string, unknown>;
}
interface Response {
    status: (code: number) => Response;
    json: (body: unknown) => unknown;
}
type NextFunction = (err?: unknown) => void;
/**
 * @example
 * import express from 'express'
 * import { pramanaMiddleware, validateAadhaar } from '@prashanttiw/pramana/express'
 *
 * const app = express()
 * app.use(express.json())
 *
 * // Validate multiple fields
 * app.post('/api/kyc',
 *   pramanaMiddleware([
 *     { field: 'aadhaar', type: 'aadhaar' },
 *     { field: 'pan', type: 'pan' },
 *     { field: 'gstin', type: 'gstin', optional: true },
 *   ]),
 *   (req, res) => res.json({ success: true })
 * )
 *
 * // Single field shorthand
 * app.post('/api/verify', validateAadhaar(), (req, res) => ...)
 */
declare function pramanaMiddleware(rules: FieldRule[]): (req: Request, res: Response, next: NextFunction) => void;
declare const validateAadhaar: (field?: string) => (req: Request, res: Response, next: NextFunction) => void;
declare const validatePAN: (field?: string) => (req: Request, res: Response, next: NextFunction) => void;
declare const validateGSTIN: (field?: string) => (req: Request, res: Response, next: NextFunction) => void;
declare const validateIFSC: (field?: string) => (req: Request, res: Response, next: NextFunction) => void;
declare const validatePincode: (field?: string) => (req: Request, res: Response, next: NextFunction) => void;
declare const validateTAN: (field?: string) => (req: Request, res: Response, next: NextFunction) => void;
declare const validateUAN: (field?: string) => (req: Request, res: Response, next: NextFunction) => void;
declare const validateVoterID: (field?: string) => (req: Request, res: Response, next: NextFunction) => void;
declare const validateDL: (field?: string) => (req: Request, res: Response, next: NextFunction) => void;
declare const validatePassport: (field?: string) => (req: Request, res: Response, next: NextFunction) => void;
declare const validateUPI: (field?: string) => (req: Request, res: Response, next: NextFunction) => void;
declare const validatePhone: (field?: string) => (req: Request, res: Response, next: NextFunction) => void;
declare const validateMSME: (field?: string) => (req: Request, res: Response, next: NextFunction) => void;

export { type DocumentType, type FieldLocation, type FieldRule, type NextFunction, type Request, type Response, type ValidationError, pramanaMiddleware, validateAadhaar, validateDL, validateGSTIN, validateIFSC, validateMSME, validatePAN, validatePassport, validatePhone, validatePincode, validateTAN, validateUAN, validateUPI, validateVoterID };