B-side order infrastructure
Secure order processing for connected commerce.
This service receives signed orders, protects payment amounts, tracks payment state, and will connect approved WeChat Pay and Alipay channels after merchant onboarding.
Signed API
HMAC-SHA256, timestamp validation and nonce replay protection.
Order Ledger
Independent payment order numbers, immutable amount checks and event history.
Provider Ready
WeChat Pay and Alipay callback endpoints are reserved but disabled until configured.