/** Deterministic short hash of arbitrary params for cache keys */
export declare function hashParams(params: Record<string, unknown>): string;
/** Get a cached value. Returns null on miss or expiry. */
export declare function cacheGet<T>(key: string): Promise<T | null>;
/** Store a value with TTL in seconds. */
export declare function cacheSet(key: string, value: unknown, ttlSeconds: number): Promise<void>;
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