import { Metadata } from "@grpc/grpc-js";
import cookie from "cookie";
import { ServerSurfaceCall } from "@grpc/grpc-js/build/src/server-call";
import { Store } from "./Store";
/**
 * Session Error Class
 */
export declare class SessionError extends Error {
    private __proto__?;
    constructor(message?: string);
}
/**
 * Session Options Interface
 */
export interface SessionOptions {
    expires?: number;
    sessionName?: string;
    checkOrigin?: boolean;
    cookie?: cookie.CookieSerializeOptions;
    debug?: boolean;
}
export declare type Primitive = string | number | boolean | null;
export declare type SessionKeyValue = Primitive | {
    [key: string]: Primitive;
};
export declare type SessionData = {
    [key: string]: SessionKeyValue;
} | null | any;
/**
 * Session class
 */
export declare class Session {
    private metadata;
    private sessionData;
    private sessionName;
    private sessionId;
    private store;
    options: SessionOptions;
    /**
     * Session
     *
     * @param store Session Store
     * @param options {sessionName:"_SID", expires: "Time in seconds: 60*60*20"}
     */
    constructor(store: Store, options?: SessionOptions);
    /**
     * Creates new session
     *
     * @param sessionData
     * @returns Session
     */
    private start;
    /**
     * Will try to restore session from id or will create a new one
     *
     * @param call ServerSurfaceCall
     * @returns Promise<Session>
     */
    gRPC(call: ServerSurfaceCall, sessionData?: SessionData): Promise<this>;
    /**
     * Get session key
     *
     * @param key string key
     * @returns string
     * @throws SessionError
     */
    get<T>(key?: string): T;
    /**
     * Sets new session key
     *
     * @param key string
     * @param value string
     * @returns Session
     * @throws SessionError
     */
    set(key: string, value: SessionKeyValue): this;
    /**
     * Removes key from session
     *
     * @param key string
     * @returns Session
     * @throws SessionError
     */
    remove(key: string): this;
    /**
     * Gets session id
     *
     * @returns string
     * @throws SessionError
     */
    id(): string;
    /**
     * Get Grpc Metadata
     *
     * @returns Metadata
     * @throws SessionError
     */
    getMetadata(): Metadata;
    /**
     * Saves Session
     *
     * @returns Promise<boolean>
     * @throws SessionError
     */
    save(): Promise<boolean>;
    /**
     * Deletes Session
     *
     * @returns Promise<boolean>
     */
    destroy(): boolean | Promise<boolean>;
    /**
     * A md5 hash of sessionId : user-agent header
     *
     * @returns string
     */
    private _MD5_hash;
}