export type IdKey = string;
type IdbSerialize<TValue, TStored> = (value: TValue) => TStored;
type IdbDeserialize<TStored, TValue> = (stored: TStored) => TValue;
export interface IdbCacheOptions<TStored, TValue> {
    dbName: string;
    storeName: string;
    version?: number;
    swallowErrors?: boolean;
    serialize: IdbSerialize<TValue, TStored>;
    deserialize: IdbDeserialize<TStored, TValue>;
    upgrade?: (db: IDBDatabase, storeName: string) => void;
    _storedType?: TStored;
}
/**
 * Generic IDB cache helper.
 * - Stores a single object per key in an objectStore.
 * - Uses serialize/deserialize so callers can store binary efficiently (ArrayBuffer, etc.).
 * - Designed for browser usage only; failures can be swallowed to avoid breaking rendering.
 */
export declare const createIdbCache: <TValue, TStored = unknown>(opts: IdbCacheOptions<TStored, TValue>) => {
    get: (key: IdKey) => Promise<TValue | undefined>;
    getMany: (keys: IdKey[]) => Promise<Map<IdKey, TValue>>;
    set: (key: IdKey, value: TValue) => Promise<void>;
    getOrCompute: (key: IdKey, compute: () => Promise<TValue>) => Promise<TValue>;
};
export {};