MadelineProtoDocs/old_docs/API_docs_v26/methods/upload.getCdnFileHashes.md

title	description	image	redirect_from
upload.getCdnFileHashes	Get SHA256 hashes for verifying downloaded [CDN](https://core.telegram.org/cdn) files	https://docs.madelineproto.xyz/favicons/android-chrome-256x256.png	/API_docs/methods/upload_getCdnFileHashes.html

Method: upload.getCdnFileHashes

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Get SHA256 hashes for verifying downloaded CDN files

Parameters:

Name	Type	Description	Required
file_token	bytes	File	Yes
offset	int	Offset from which to start getting hashes	Yes

Return type: Vector_of_FileHash

Can bots use this method: YES

MadelineProto Example (now async for huge speed and parallelism!):

if (!file_exists('madeline.php')) {
    copy('https://phar.madelineproto.xyz/madeline.php', 'madeline.php');
}
include 'madeline.php';

$MadelineProto = new \danog\MadelineProto\API('session.madeline');
$MadelineProto->start();

$Vector_of_FileHash = $MadelineProto->upload->getCdnFileHashes(['file_token' => 'bytes', 'offset' => int, ]);

Or, if you're into Lua:

Vector_of_FileHash = upload.getCdnFileHashes({file_token='bytes', offset=int, })

Errors

Code	Type	Description
400	CDN_METHOD_INVALID	You can't call this method in a CDN DC
400	RSA_DECRYPT_FAILED	Internal RSA decryption failed