gistfile1.txt

public function webhook(Request $request)
    {
        $http_body = file_get_contents("php://input");
        $headers = getallheaders();
        $key_from_configuration =
            "D079ADB4A1EE4FD9CF02034C76EEDC86707F86296DE010A6332848DFD086139B";

        $iv_from_http_header = $headers["X-Initialization-Vector"];
        $auth_tag_from_http_header = $headers["X-Authentication-Tag"];

        $key = hex2bin($key_from_configuration);
        $iv = hex2bin($iv_from_http_header);
        $cipher_text = hex2bin($http_body.$auth_tag_from_http_header);

        $result = \Sodium\crypto_aead_aes256gcm_decrypt(
            $cipher_text, NULL, $iv, $key);

        return response('Hello World', 200)
            ->header('Content-Type', 'text/plain');
    }