View Source ExTDLib.Method.DownloadFile (ExTDLib v0.0.4)

Downloads a file from the cloud. Download progress and completion of the download will be notified through updateFile updates. Returns object_ptr<File>.

NameTypeDescription
file_idnumberIdentifier of the file to download.
prioritynumberPriority of the download (1-32). The higher the priority, the earlier the file will be downloaded. If the priorities of two files are equal, then the last one for which downloadFile/addFileToDownloads was called will be downloaded first.
offsetstringThe starting position from which the file needs to be downloaded.
limitstringNumber of bytes which need to be downloaded starting from the "offset" position before the download will automatically be canceled; use 0 to download without a limit.
synchronousboolPass true to return response only after the file download has succeeded, has failed, has been canceled, or a new downloadFile request with different offset/limit parameters was sent; pass false to return file state immediately, just after the download has been started.

More details on telegram's documentation.