import type { Edge } from 'edge.js';
import type { HttpContext } from '@adonisjs/core/http';
import type { Encryption } from '@adonisjs/core/encryption';
import { noop } from '../noop.ts';
import type { CsrfOptions } from '../types.ts';
/**
 * A class to encapsulate the logic of verifying and generating
 * CSRF tokens.
 */
export declare class CsrfGuard {
    #private;
    /**
     * Creates a new CsrfGuard instance.
     *
     * @param options - CSRF configuration options
     * @param encryption - Encryption service instance
     * @param edge - Optional Edge template engine instance
     */
    constructor(options: CsrfOptions, encryption: Encryption, edge?: Edge);
    /**
     * Handles CSRF verification for the current request.
     * Gets or creates a CSRF secret, generates a token, optionally sets XSRF cookie,
     * shares helpers with views, and validates the request if required.
     *
     * @param ctx - HTTP context object
     */
    handle(ctx: HttpContext): Promise<void>;
}
/**
 * A factory function that returns a new function to enforce CSRF protection.
 * Creates a CsrfGuard instance and returns its handle method.
 *
 * @param options - CSRF configuration options
 * @param encryption - Encryption service instance
 * @param edge - Optional Edge template engine instance
 *
 * @example
 * const csrfGuard = csrfFactory({
 *   enabled: true,
 *   methods: ['POST', 'PUT', 'DELETE']
 * }, encryption, edge)
 */
export declare function csrfFactory(options: CsrfOptions, encryption: Encryption, edge?: Edge): typeof noop;