62 lines
2.4 KiB
Markdown
62 lines
2.4 KiB
Markdown
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---
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title: auth.bindTempAuthKey
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description: Binds a temporary authorization key `temp_auth_key_id` to the permanent authorization key `perm_auth_key_id`. Each permanent key may only be bound to one temporary key at a time, binding a new temporary key overwrites the previous one.
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image: https://docs.madelineproto.xyz/favicons/android-chrome-256x256.png
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redirect_from: /API_docs/methods/auth_bindTempAuthKey.html
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---
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# Method: auth.bindTempAuthKey
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[Back to methods index](index.md)
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Binds a temporary authorization key `temp_auth_key_id` to the permanent authorization key `perm_auth_key_id`. Each permanent key may only be bound to one temporary key at a time, binding a new temporary key overwrites the previous one.
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For more information, see [Perfect Forward Secrecy](https://core.telegram.org/api/pfs).
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### Parameters:
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| Name | Type | Description | Required |
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|----------|---------------|-------------|----------|
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|perm\_auth\_key\_id|[long](../types/long.md) | Permanent auth\_key\_id to bind to | Yes|
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|nonce|[long](../types/long.md) | Random long from [Binding message contents](#binding-message-contents) | Yes|
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|expires\_at|[int](../types/int.md) | Unix timestamp to invalidate temporary key, see [Binding message contents](#binding-message-contents) | Yes|
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|encrypted\_message|[bytes](../types/bytes.md) | See [Generating encrypted\_message](#generating-encrypted-message) | Yes|
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### Return type: [Bool](../types/Bool.md)
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### Can bots use this method: **YES**
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### MadelineProto Example ([now async for huge speed and parallelism!](https://docs.madelineproto.xyz/docs/ASYNC.html)):
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```php
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if (!file_exists('madeline.php')) {
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copy('https://phar.madelineproto.xyz/madeline.php', 'madeline.php');
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}
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include 'madeline.php';
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$MadelineProto = new \danog\MadelineProto\API('session.madeline');
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$MadelineProto->start();
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$Bool = $MadelineProto->auth->bindTempAuthKey(['perm_auth_key_id' => long, 'nonce' => long, 'expires_at' => int, 'encrypted_message' => 'bytes', ]);
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```
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Or, if you're into Lua:
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```lua
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Bool = auth.bindTempAuthKey({perm_auth_key_id=long, nonce=long, expires_at=int, encrypted_message='bytes', })
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```
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### Errors
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| Code | Type | Description |
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|------|----------|---------------|
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|400|ENCRYPTED_MESSAGE_INVALID|Encrypted message invalid|
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|400|INPUT_REQUEST_TOO_LONG|The request is too big|
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|400|TEMP_AUTH_KEY_EMPTY|No temporary auth key provided|
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|-503|Timeout|Timeout while fetching data|
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