import type { BrightDb } from '@brightchain/db';
/**
 * Shape of a session document stored in BrightDB.
 * Exported so consumers (tests, controllers) can reference the type.
 */
export interface ISessionDocument {
    /** UUID v4 identifying this session. */
    sessionId: string;
    /** Hex-encoded member ID. */
    memberId: string;
    /** SHA-256 hex digest of the JWT token. */
    tokenHash: string;
    /** Epoch-ms when the session was created. */
    createdAt: number;
    /** Epoch-ms when the session expires. */
    expiresAt: number;
}
/**
 * Manages user sessions backed by a BrightDB `sessions` collection.
 *
 * Token hashes use SHA-256 (not bcrypt) so that `validateToken` can
 * query by hash without a per-row compare.
 */
export declare class BrightChainSessionAdapter {
    private readonly db;
    constructor(db: BrightDb);
    /**
     * Create a new session for the given member.
     *
     * @param memberId  Hex string of the member's ID.
     * @param token     The raw JWT token (will be SHA-256 hashed for storage).
     * @param ttlMs     Time-to-live in milliseconds.
     * @returns The generated UUID session ID.
     */
    createSession(memberId: string, token: string, ttlMs: number): Promise<string>;
    /**
     * Retrieve a session by its ID.
     *
     * @returns The session document, or `null` if not found or expired.
     */
    getSession(sessionId: string): Promise<ISessionDocument | null>;
    /**
     * Validate a raw JWT token against stored sessions.
     *
     * Hashes the token with SHA-256, looks up the matching session,
     * and checks expiration.
     *
     * @returns The session document, or `null` if invalid / expired / missing.
     */
    validateToken(token: string): Promise<ISessionDocument | null>;
    /**
     * Delete a session by its ID.
     */
    deleteSession(sessionId: string): Promise<void>;
    /**
     * Remove all expired sessions.
     *
     * @returns The number of sessions removed.
     */
    cleanExpired(): Promise<number>;
}
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