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    Q]Íià  ã                   @   s@   d dl Z d dlZd dlZd dlmZ eee eedœdd„ZdS )é    N)ÚOptional)ÚbodyÚsignature_headerÚchannel_secretÚreturnc                 C   sF   |r|d u rdS t  | d¡| tj¡ ¡ }t |¡ d¡}t  	||¡S )NFzutf-8)
ÚhmacÚnewÚencodeÚhashlibÚsha256ÚdigestÚbase64Ú	b64encodeÚdecodeÚcompare_digest)r   r   r   r   Úexpected© r   ú2C:\Users\jasmi\backend\app\services\line_verify.pyÚverify_line_signature   s    ýr   )	r   r
   r   Útypingr   ÚbytesÚstrÚboolr   r   r   r   r   Ú<module>   s   