> For the complete documentation index, see [llms.txt](https://onestore-dev.gitbook.io/dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://onestore-dev.gitbook.io/dev/chi/tools/billing/v21/references/interfaces.md).

# Interfaces

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