# Installation
> `npm install --save @types/koa-generic-session`

# Summary
This package contains type definitions for koa-generic-session (https://github.com/koajs/generic-session).

# Details
Files were exported from https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/koa-generic-session.
## [index.d.ts](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/koa-generic-session/index.d.ts)
````ts
import Cookies = require("cookies");
import Koa = require("koa");

declare namespace koaSession {
    interface Session {
        cookie: Cookies.SetOption;
    }

    interface SessionIdStore<Ctx = Koa.Context> {
        get(this: Ctx): string | undefined;
        set(this: Ctx, sid: string, session: Session): void;
        reset(this: Ctx): void;
    }

    interface SessionStore {
        get(sid: string): Session | undefined | Promise<Session | undefined>;
        set(sid: string, session: Session, ttl?: number): void | Promise<void>;
        destroy(sid: string): void | Promise<void>;
    }

    interface SessionOptions {
        key?: string | undefined;
        store?: SessionStore | undefined;
        ttl?: number | undefined;
        prefix?: string | undefined;
        cookie?: Cookies.SetOption | undefined;
        allowEmpty?: boolean | undefined;
        defer?: boolean | undefined;
        reconnectTimeout?: number | undefined;
        rolling?: boolean | undefined;
        sessionIdStore?: SessionIdStore | undefined;
        genSid?(this: Koa.Context, length: number): string | Promise<string>;
        errorHandler?(error: Error, type: string, ctx: Koa.Context): void;
        valid?(ctx: Koa.Context, session: Session): boolean;
        beforeSave?(ctx: Koa.Context, session: Session): void;
    }

    class MemoryStore implements SessionStore {
        get(sid: string): Session | undefined;
        set(sid: string, session: Session): void;
        destroy(sid: string): void;
    }
}

declare module "koa" {
    interface ExtendableContext {
        sessionId: string;
        session: koaSession.Session | null;
        sessionSave: boolean | null;
        regenerateSession(): Promise<void>;
    }
}

declare function koaSession(options: koaSession.SessionOptions): Koa.Middleware;
export = koaSession;

````

### Additional Details
 * Last updated: Fri, 24 Oct 2025 04:02:41 GMT
 * Dependencies: [@types/cookies](https://npmjs.com/package/@types/cookies), [@types/koa](https://npmjs.com/package/@types/koa)

# Credits
These definitions were written by [Nick Simmons](https://github.com/nsimmons), and [Javier Garcia](https://github.com/javiertury).