Ensure the following environment variables are set when deploying:
WECHATPAY_PUBLIC_KEY_PATH- absolute path to the downloaded WeChat Pay public key.WECHATPAY_PUBLIC_KEY_ID- the corresponding WeChat Pay public key ID.WECHATPAY_NOTIFICATION_USE_COMBINED- set totrueonly during the transition period when callbacks must accept both platform certificates and public keys (defaults tofalse).
These variables complement the existing merchant certificate inputs so the service can build RSAPublicKeyConfig instances required by the 0.2.15+ Java SDK.