export declare function buildFirebaseMediaUrl(bucket: string, storagePath: string, token: string): string;
export declare function buildMediaDownloadUrl(bucket: string, storagePath: string, token: string): string;
/** Accept historical Firebase URLs and Canon links, only for the expected bucket. */
export declare function parseMediaStoragePath(value: unknown, bucket: string): string | null;
/** Presentation upgrade for existing messages without rewriting their stored URLs. */
export declare function canonMediaDownloadUrl(value: string, downloadFileName?: string): string;