Instalment Calculations
Instalment plans and partial payments
If a customer chooses the Ratepay product Instalment during the ordering process, the shop must implement the operation CALCULATION_REQUEST to calculate an exemplary instalment plan and show its result to the customer. Some input parameters are transferred from the shop (e.g. the shopping cart amount), others are stored in the Ratepay profile of the merchant (e.g. the allowed interest rate range). Merchants' profile parameters can be retrieved using the CONFIGURATION_REQUEST process.
CONFIGURATION_REQUEST
Retrieve the stored configuration parameters for a certain merchant profile. The Configuration Request is supposed to be used only by the merchant’s shop backend.
CALCULATION_REQUEST
Provides an instalment plan depending on the request parameters and stored parameters of the merchant profile.
attention
An instalment calculator, which already includes these functions, can be found in our PHP SDK: https://github.com/ratepay/php-sdk