Is the orderItems item displayed to users from the app?
If the total amount of unitprice of orderItems in multiple items exceeds the amount set in amount, will an error occur in the system? If there is no error, is the amount actually traded the amount in the amount item? If 0 is not allowed in the unit price
Is it necessary to apply for whitelisting of IP addresses before using OPA?
What is AssumeMerchant?
What happens to the Application Program Interface(API) response when maintenance is being performed on the PayPay side?
When handling multiple merchant, are the API credential information (api key, apiKeySecret) different for each?
Does the API credential information (api key, apiKeySecret) have an expiration date?