import type { PermissionSet } from './types.js';
export declare class PermissionCache {
    private readonly store;
    private readonly ttlMs;
    constructor(ttlMs: number);
    get(userId: string, tenantId: string, authVersion: number): PermissionSet | null;
    set(permissionSet: PermissionSet): void;
    invalidate(userId: string, tenantId: string): void;
    clear(): void;
    get size(): number;
    private key;
}
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