[图片] 让检查$key and $iv ， 这是啥？ * Connection #0 to host api.mch.weixin.qq.com left intact Decrypting the input $ciphertext failed, please checking your $key and $iv whether or nor correct. #0 C:\phpstudy_pro\WWW\xiaozhi-api\vendor\wechatpay\wechatpay\bin\CertificateDownloader.php(64): WeChatPay\Crypto\AesGcm::decrypt('\xBD"\xDB\x19g\xA2\xE3\xDA\xD5\x01\xE666\xB4\x19...', 'yixuanchangVmgT...', 'd0c62f7e2505', 'certificate') #1 [internal function]: CertificateDownloader::{closure}(Object(stdClass))

微信小商店提供优惠券发放接口，需指定小商店用户的openid，这个openid从哪里获取呢？ [图片]