Alipay does not recommend any order for implementing the APIs. However, Alipay requires the integrator to implement all the following APIs.
- Forex_refund: Refund a transaction.
- Single_trade_query: Obtain the information on a particular transaction.
- Forex_rate_file: Obtain the exchange rate from Alipay.
- Notify_verify: Validate whether a notification is from Alipay Server to asure the authenticity of the response data.