/// <reference types="node" />
import { BinaryToTextEncoding } from 'crypto';
import { Request } from 'express';
/**
 * @category Helper
 */
export declare type EnvoySignatureVerifierOptions = {
    algorithm: 'sha256' | string;
    encoding: BinaryToTextEncoding;
    secret: string;
    header: 'x-envoy-signature' | string;
};
/**
 * Verifies that a request is coming from Envoy.
 *
 * @category Helper
 */
export default class EnvoySignatureVerifier {
    private readonly options;
    constructor(options?: EnvoySignatureVerifierOptions);
    /**
     * Verifies that the signature provided matches the request body.
     */
    verify(req: Request, rawBody: Buffer): boolean;
}
//# sourceMappingURL=EnvoySignatureVerifier.d.ts.map