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[API guide] Custom price payment feature support

The discount feature in the PG payment API is being changed to a custom price payment feature. The term "discount coupon" is being changed to "percentage discount coupon".

  1. Changed discount_type → price_type in API request/response
  2. Updated web PG payment API parameter structure
  3. Implemented mandatory security verification logic for custom price payments

Main changes

1. Field name changes

  • discount_type → price_type
  • Values: none: standard price payment, custom_price: custom price payment

2. Web PG payment API parameter changes

Removed parameters: discount_type, discount_price, total_price, coupon, point Added parameters: custom_price, discount_coupon

3. Payment verification for custom price payments

When making custom price payments, you must verify the amount/currency through gameserver_price_verify_key.

Updated guides