wechatpay-basic-payment

To integrate WeChat Pay APIv3, you must construct requests using certificate-based signing, verify responses, handle callbacks, and apply robust error handling for secure production deployments across JSAPI, APP, H5, Native, and mini-program scenarios.

Choosing the right WeChat Pay payment method requires evaluating your application scenario to select between JSAPI, APP, H5, Native, or mini-program integrations, ensuring the payment flow aligns with your specific user interaction environment.

Handling WeChat Pay refunds and split refunds across sub-merchants involves applying specific refund rules and settlement workflows, accessing business state lookups, and utilizing provided code templates to manage sub-merchant reconciliation accurately.

WeChat Pay callback signature validation fails when certificate-based signing is incorrectly applied or response verification is skipped, requiring strict adherence to APIv3 request construction and callback handling checks to resolve the issue.

Yes, you can use this integration guide for merchant onboarding and risk checks, as it centralizes complexities like settlements, onboarding workflows, and risk checks to accelerate secure deployments and reduce integration risk.

Troubleshooting WeChat Pay settlement workflows is limited by the need for precise APIv3 request construction and response verification; errors often stem from incorrect certificate-based signing or inadequate handling of settlement state transitions.