export declare function useMediaCache(): {
    getCached: (cacheKey: string) => Promise<string | null>;
    setCache: (cacheKey: string, base64: string) => Promise<void>;
    removeFromCache: (cacheKey: string) => Promise<void>;
    fetchWithCache: (cacheKey: string, fetchFn: () => Promise<string>) => Promise<string | null>;
    fetchUrlAsBase64: (url: string) => Promise<string>;
    fetchUrlWithMetadata: (url: string) => Promise<{
        base64: string;
        mimeType: string | null;
    }>;
    getOrFetchBase64: (vaultReference: string, resolvedUrl: string) => Promise<string | null>;
    base64ToDataUrl: (base64: string, mimeType: string) => string;
};