export type MaterializedSnapshotEntry = {
    cacheKey: string;
    generation: number;
    expiresAt: number;
    updatedAt: string;
    payload: Record<string, unknown>;
};
export declare function readMaterializedSnapshot(cacheKey: string, input?: {
    allowStale?: boolean;
    generation?: number;
    nowMs?: number;
}): Record<string, unknown> | null;
export declare function writeMaterializedSnapshot(cacheKey: string, payload: Record<string, unknown>, input: {
    generation: number;
    ttlMs: number;
    nowMs?: number;
}): void;
export declare function clearMaterializedSnapshotMemory(): void;