MadelineProtoDocs/old_docs/API_docs_v24/methods/upload.getCdnFileHashes.md
2020-06-16 17:50:25 +02:00

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---
title: upload.getCdnFileHashes
description: Get SHA256 hashes for verifying downloaded [CDN](https://core.telegram.org/cdn) files
image: https://docs.madelineproto.xyz/favicons/android-chrome-256x256.png
redirect_from: /API_docs/methods/upload_getCdnFileHashes.html
---
# Method: upload.getCdnFileHashes
[Back to methods index](index.md)
Get SHA256 hashes for verifying downloaded [CDN](https://core.telegram.org/cdn) files
### Parameters:
| Name | Type | Description | Required |
|----------|---------------|-------------|----------|
|file\_token|[bytes](../types/bytes.md) | File | Yes|
|offset|[int](../types/int.md) | Offset from which to start getting hashes | Yes|
### Return type: [Vector\_of\_CdnFileHash](../types/CdnFileHash.md)
### Can bots use this method: **YES**
### MadelineProto Example ([now async for huge speed and parallelism!](https://docs.madelineproto.xyz/docs/ASYNC.html)):
```php
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_CdnFileHash = $MadelineProto->upload->getCdnFileHashes(['file_token' => 'bytes', 'offset' => int, ]);
```
Or, if you're into Lua:
```lua
Vector_of_CdnFileHash = 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|