parseOrderNotifyV3Result报错

[syjlpineapple]

版本4.8.0
方法：WxPayNotifyV3Result parseOrderNotifyV3Result(String var1, SignatureHeader var2)
回调验证是平台证书方式，不是公钥方式。
private WxPayServiceImpl getWxPayService(WechatPayProperties mchConfig) {

WxPayConfig payConfig = new WxPayConfig();
payConfig.setAppId(wechatConfig.getWechatAppid());
payConfig.setMchId(mchConfig.getMchId());
payConfig.setApiV3Key(mchConfig.getApiV3Key());
payConfig.setPrivateKeyPath(mchConfig.getPrivateKeyPath());
payConfig.setPrivateCertPath(mchConfig.getPrivateCertPath());
payConfig.setNotifyUrl(mchConfig.getNotifyUrl());
payConfig.setCertSerialNo(mchConfig.getCertSerialNo());
WxPayServiceImpl service = new WxPayServiceImpl();
service.setConfig(payConfig);
return service;

}
WxPayNotifyV3Result notifyResult =
wxPayService.parseOrderNotifyV3Result(
body,
signatureHeader
);解析时报错：非法请求，头部信息验证失败