微信支付v2，更新了api v2安全key。现在下单用新key签名成功，但是回调通知用新key签名失败。使用老key签名成功。
这个问题怎么解决。
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APIV2密钥更新后，七天内会发送两种回调，一个是旧秘钥加密，一个是新秘钥加密。需要认真检查日志，因为可能旧秘钥加密导致签名失败的，其实新秘钥加密的回调已经成功了。