import type { SessionStore } from '../../contracts/SessionStore.js';
/**
 * Cookie-backed session: the serialized payload lives entirely in the session cookie.
 *
 * When `encrypt` is true, the payload is AES-256-GCM encrypted; otherwise it is signed with HMAC-SHA256.
 */
export declare class CookieStore implements SessionStore {
    private readonly secret;
    private readonly encrypt;
    private incomingCookie;
    private outgoingPayload;
    /**
     * @param secretKey - Application secret (UTF-8) used for signing/encryption.
     * @param encrypt - When true, encrypt payload; when false, sign only.
     */
    constructor(secretKey: string, encrypt: boolean);
    /**
     * Captures the raw `Cookie` header for {@link CookieStore.read}.
     *
     * @param cookieHeader - `Cookie` header value.
     * @param cookieName - Session cookie name.
     */
    setIncoming(cookieHeader: string | undefined, cookieName: string): void;
    /**
     * @returns Payload to set on `Set-Cookie` after {@link CookieStore.write}.
     */
    getOutgoingCookieValue(): string;
    /**
     * @inheritdoc
     */
    open(_savePath: string, _sessionName: string): Promise<void>;
    /**
     * @inheritdoc
     */
    close(): Promise<void>;
    /**
     * @inheritdoc
     */
    read(_sessionId: string): Promise<string>;
    /**
     * @inheritdoc
     */
    write(_sessionId: string, data: string): Promise<void>;
    /**
     * @inheritdoc
     */
    destroy(_sessionId: string): Promise<void>;
    /**
     * @inheritdoc
     */
    gc(_maxLifetime: number): Promise<number>;
}
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