About the Server-to-Server Model

In this flow, a server-to-server communication occurs. After a purchase, Appcharge triggers a webhook to the publisher’s backend with the transaction details. The publisher's server updates the player's balance accordingly.

High-Level Flow:

1. Player clicks to purchase
   The player selects an item to purchase from the in-game store. The game server initiates server-to-server communication with Appcharge's backend to handle the checkout process.
2. Create Checkout Session
   The game server uses the SDK to request from Appcharge’s backend a session that contains all the details needed for opening the checkout. This session setup involves localization, tax calculations, and payment method preparation, all managed through server-to-server API calls.
3. Checkout Response
   The SDK receives a response from the backend confirming that a checkout session has been successfully created. This response includes all the necessary information to proceed with the payment.
4. Acknowledgement
   Once the payment is successfully processed, Appcharge's backend sends a confirmation directly to the game server. This confirmation acknowledges that the purchase was successful and that the player will receive the purchased item.
5. Balance Update
   Following the confirmation, the game server updates the player’s balance in the game to reflect the purchase, thereby completing the transaction.