Ecom (Epic Games Store)

The Ecom interface handles offers, purchases and entitlements for games sold on the Epic Games Store. It needs an Epic Account login (Auth interface), not only a Connect login.

• EOS Ecom documentation

Common Nodes

Node	Use
EOS_Ecom_QueryOffers	Downloads the offers in your catalog
EOS_Ecom_GetOfferCount + EOS_Ecom_CopyOfferByIndex	Reads offers (title, price, currency)
EOS_Ecom_Checkout	Opens the purchase flow in the EOS overlay
EOS_Ecom_GetTransactionCount + EOS_Ecom_CopyTransactionByIndex	Reads finished transactions, release them with EOS_Ecom_Transaction_Release
EOS_Ecom_QueryEntitlements	Downloads what the player owns
EOS_Ecom_GetEntitlementsCount + EOS_Ecom_CopyEntitlementByIndex	Reads entitlements
EOS_Ecom_QueryOwnership	Checks if the player owns specific catalog items, for example DLC
EOS_Ecom_RedeemEntitlements	Marks consumable entitlements as redeemed
EOS_Ecom_QueryOwnershipToken / EOS_Ecom_QueryEntitlementToken	Signed tokens your backend can verify

Notes

• Checkout uses the EOS overlay, so it only works in a Standalone or packaged game started with the overlay enabled.
• Grant items from the transaction or from a fresh QueryEntitlements, never from the client alone. For important items, verify an ownership or entitlement token on your server.
• The EOSCore Online Subsystem Store/Purchase interface is only available when the game was started from the Epic Games Launcher (-EpicPortal).