package setting // WeChat Pay direct integration (via WeChat Pay APIv3) var ( WechatPayEnabled bool WechatPayAppId string WechatPayMchId string WechatPayApiV3Key string WechatPayPrivateKey string WechatPayCertSerial string WechatPayNotifyUrl string WechatPayReturnUrl string WechatPayUnitPrice float64 = 1.0 WechatPayMinTopUp int = 1 WechatPaySandbox bool WechatPaySandboxMchId string WechatPaySandboxApiV3Key string WechatPaySandboxPrivateKey string )