/// <reference types="node" />
import { NotRequestKey, Request } from "../../common";
import { VerifyOptions } from 'jsonwebtoken';
export type JwtFromRequestFunction = (req: Request) => unknown;
export interface StrategyOptions<T extends string = 'user'> {
    /**
     * symmetric key or public key of asymmetric key
     */
    readonly secret: string | Buffer;
    /**
     * extract jwt from request, if a token not exist, return null.
     * @param req user's request context
     * @returns token or null
     */
    readonly jwtFromRequest: readonly JwtFromRequestFunction[];
    /**
     * jwt verify options
     */
    readonly verifyOptions?: Omit<VerifyOptions, 'complete'>;
    /**
     * request[key] refers to identity object.
     */
    readonly key: NotRequestKey<T>;
}