export declare const ALLOWED_MIME_TYPES: readonly ["application/pdf", "application/vnd.openxmlformats-officedocument.wordprocessingml.document", "application/vnd.openxmlformats-officedocument.presentationml.presentation", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "image/jpeg", "image/png", "video/mp4", "video/quicktime"];
export type AllowedMimeType = (typeof ALLOWED_MIME_TYPES)[number];
export declare const MAX_FILE_SIZE_BYTES: number;
export declare const EXT_BY_MIME: Record<string, string>;
export declare const MIME_EQUIVALENCE_GROUPS: Record<string, string[]>;
export declare function isMimeEquivalent(declared: string, detected: string | undefined): boolean;
export declare const getStorageRoot: () => string;
export declare const getTmpUploadDir: () => string;
export declare const getGcIntervalHours: () => number;
export declare const getPhysicalDeleteDays: () => number;