Find ESTO Hire Purchase plugin in nopCommerce admin under FinestCommerce plugins.
path: /Admin/PaymentEstoHirePurchase/Configure
You can configure in admin plugin settings:
Use Sandbox - check if you want to enable sandbox;
Shop ID - merchant's shop ID, received from ESTO;
Secret API Key - merchant's secret API key received from ESTO;
Send Customer Information To ESTO - customer information will be used to pre-fill application form in ESTO;
Send Shopping Cart Items To ESTO - shopping cart items will be included in new application request;
Send Purchase Items Separately - if "True": every item from shopping cart will be sent as separate product including shipping; if "False": One item 'Shopping cart N' will be sent to payment provider;
Save Application Details For Order - check to save full application information from the payment provider as an order note for easier investigation;
Use Verbose Logging - if checked, then all requests to endpoints will be logged with the received data, for debugging purposes.
You can manage in admin order max and min value:
Use minimum cart total limiter - if to check, then can admin configure the min cart amount upon which ESTO Hire Purchase is allowed as payment method in checkout;
Use maximum cart total limiter - if to check, then can admin configure the max cart amount upon which ESTO Hire Purchase is allowed as payment method in checkout.
When after choosing delivery method order total is recalculated in checkout then plugin checks max and min value and when order total is bigger or smaller than allowed range, then is payment method hided.