import type { Edge } from 'edge.js';
import type { HttpContext } from '@adonisjs/core/http';
import type { Encryption } from '@adonisjs/core/encryption';
import { noop } from '../noop.js';
import type { CsrfOptions } from '../types.js';
/**
 * A class to encapsulate the logic of verifying and generating
 * CSRF tokens.
 */
export declare class CsrfGuard {
    #private;
    constructor(options: CsrfOptions, encryption: Encryption, edge?: Edge);
    /**
     * Handle csrf verification. First, get the secret,
     * next, check if the request method should be
     * verified. Next, attach the newly generated
     * csrf token to the request object.
     */
    handle(ctx: HttpContext): Promise<void>;
}
/**
 * A factory function that returns a new function to enforce CSRF
 * protection
 */
export declare function csrfFactory(options: CsrfOptions, encryption: Encryption, edge?: Edge): typeof noop;