# Interfaces

* [AcknowledgeListener](https://onestore-dev.gitbook.io/dev/cht/tools/billing/v21/references/interfaces/acknowledgelistener)
* [ConsumeListener](https://onestore-dev.gitbook.io/dev/cht/tools/billing/v21/references/interfaces/consumelistener)
* [IapResultListener](https://onestore-dev.gitbook.io/dev/cht/tools/billing/v21/references/interfaces/iapresultlistener)
* [ProductDetailsListener](https://onestore-dev.gitbook.io/dev/cht/tools/billing/v21/references/interfaces/productdetailslistener)
* [PurchaseClientStateListener](https://onestore-dev.gitbook.io/dev/cht/tools/billing/v21/references/interfaces/purchaseclientstatelistener)
* [PurchasesListener (deprecated)](https://onestore-dev.gitbook.io/dev/cht/tools/billing/v21/references/interfaces/purchaseslistener-deprecated)
* [PurchasesUpdatedListener](https://onestore-dev.gitbook.io/dev/cht/tools/billing/v21/references/interfaces/purchasesupdatedlistener)
* [QueryPurchasesListener](https://onestore-dev.gitbook.io/dev/cht/tools/billing/v21/references/interfaces/querypurchaseslistener)
* [RecurringProductListener](https://onestore-dev.gitbook.io/dev/cht/tools/billing/v21/references/interfaces/recurringproductlistener)
* [StoreInfoListener](https://onestore-dev.gitbook.io/dev/cht/tools/billing/v21/references/interfaces/storeinfolistener)