import { Algorithm, VerifyOptions } from 'jsonwebtoken';
export declare type EnvoyJWTAlgorithm = Algorithm;
export declare type EnvoyJWTDecodeOptions = VerifyOptions;
/**
 * Helper to encode and decode JWTs.
 *
 * @category Helper
 * @category Request Object
 */
export default class EnvoyJWT {
    private secret;
    private algorithm;
    constructor(secret?: string, algorithm?: EnvoyJWTAlgorithm);
    encode(subject: string | number | null, expiresIn: string | number | null, payload?: Record<string, unknown>): string;
    decode(token: string, options?: EnvoyJWTDecodeOptions): Record<string, unknown>;
}
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