export declare const validImageFormats: string[];
export declare const validDocumentFormats: string[];
export interface R2UploadData {
    key: string;
    bucket: string;
    contentType: string;
    size: number;
    eTag: string;
    url: string;
}
export interface R2PresignedUploadUrlRequest {
    fileName: string;
    contentType: string;
    folder?: string;
    expiresInSeconds?: number;
}
export interface R2PresignedUploadUrlData {
    uploadUrl: string;
    key: string;
    bucket: string;
    contentType: string;
    expiresInSeconds: number;
    expiresAt: string;
    publicUrl: string;
}
export interface R2PresignedUploadOptions {
    fileName?: string;
    contentType?: string;
    folder?: string;
    expiresInSeconds?: number;
}
export interface R2PresignedUploadResult {
    message: string;
    success: boolean;
    url?: string;
    data?: R2PresignedUploadUrlData;
    eTag?: string | null;
}
export interface UploadResponse<T = string | R2UploadData> {
    message: string;
    success: boolean;
    data?: T;
}
type UploadFileParam = Blob & {
    name?: string;
    type?: string;
    uri?: string;
};
/**
 * Generic method to upload file or image
 * @param file File
 * @returns Promise<{message: string, success: boolean, url?: string}>
 */
export declare function uploadAttachment(file: File, token?: string): Promise<{
    message: string;
    success: boolean;
    url?: string;
}>;
/**
 * Method to upload a file or image to R2 storage.
 * @param body FormData. Append the file under the "file" key.
 * @param token string?
 * @returns UploadResponse<R2UploadData> | null
 */
export declare function uploadR2Storage(body: FormData, token?: string): Promise<UploadResponse<R2UploadData> | null>;
/**
 * Method to request an R2 pre-signed upload URL from the backend.
 * @param body Request metadata for the file to upload.
 * @param token string?
 * @returns UploadResponse<R2PresignedUploadUrlData> | null
 */
export declare function getR2PresignedUploadUrl(body: R2PresignedUploadUrlRequest, token?: string): Promise<UploadResponse<R2PresignedUploadUrlData> | null>;
/**
 * Method to upload a file body to a pre-signed R2 URL.
 * @param uploadUrl URL returned by getR2PresignedUploadUrl
 * @param file Blob/File, raw body, or compatible file-like object
 * @param contentType Must match the contentType used when creating the signed URL.
 * @returns Response from R2
 */
export declare function uploadToR2PresignedUrl(uploadUrl: string, file: UploadFileParam | Blob | BodyInit | any, contentType: string): Promise<Response>;
/**
 * Full R2 pre-signed upload workflow: create URL, PUT file to R2, return public URL.
 * @param file Blob/File, raw body, or compatible file-like object
 * @param options Optional fileName/contentType/folder/expiresInSeconds overrides.
 * @param token string?
 * @returns R2PresignedUploadResult
 */
export declare function uploadWithR2PresignedUrl(file: UploadFileParam | Blob | BodyInit | any, options?: R2PresignedUploadOptions, token?: string): Promise<R2PresignedUploadResult>;
/**
 * Method to upload image to server
 * @param body FormData
 * @param token string?
 * @returns JSON | string | null
 */
export declare function uploadImage(body: FormData, token?: string): Promise<R2PresignedUploadResult>;
/**
 * Method to upload image to server
 * @param body FormData
 * @param token string?
 * @returns JSON | string | null
 */
export declare function uploadImageV2(body: FormData, token?: string): Promise<UploadResponse<string | R2UploadData> | null>;
/**
 * Method to upload file to server
 * @param body FormData
 * @param token string?
 * @returns JSON | string | null
 */
export declare function uploadFile(body: FormData, token?: string): Promise<UploadResponse<R2UploadData> | null>;
export declare function getUploadFileLimit(): Promise<{}>;
export {};