{"code":"SIGN_ERROR","detail":{"detail":{"issue":"sign not match"},"field":"signature","location":"authorization","sign_information":{"method":"POST","sign_message_length":393,"truncated_sign_message":"POST\n/v3/transfer/batches\n1665728088\n1379c82307a840bd8088688a33e2ff4a\n{\"transf\n","url":"/v3/transfer/batches"}},"message":"错误的签名，验签失败"}
问题解决了吗？我也是今天突然出现几单退款失败，提示错误的签名，验签失败。
再次点击退款就可以了。
工具只能校验计算方式是否正确，无法校验参数的正确性，V3接口签名错误参考：https://developers.weixin.qq.com/community/develop/doc/000c46d5d481804ba98bec90356809
就是签名错了呗