# 05. 원스토어 인앱결제 레퍼런스

- [Annotations](/dev/tools/billing/v21/references/annotations.md)
- [PurchaseClient.ConnectionState](/dev/tools/billing/v21/references/annotations/purchaseclient.connectionstate.md)
- [PurchaseClient.FeatureType](/dev/tools/billing/v21/references/annotations/purchaseclient.featuretype.md)
- [PurchaseClient.ProductType](/dev/tools/billing/v21/references/annotations/purchaseclient.producttype.md)
- [PurchaseClient.RecurringAction](/dev/tools/billing/v21/references/annotations/purchaseclient.recurringaction.md)
- [PurchaseClient.ResponseCode](/dev/tools/billing/v21/references/annotations/purchaseclient.responsecode.md)
- [PurchaseData.AcknowledgeState](/dev/tools/billing/v21/references/annotations/purchasedata.acknowledgestate.md)
- [PurchaseData.PurchaseState](/dev/tools/billing/v21/references/annotations/purchasedata.purchasestate.md)
- [PurchaseData.RecurringState](/dev/tools/billing/v21/references/annotations/purchasedata.recurringstate.md)
- [PurchaseFlowParams.ProrationMode](/dev/tools/billing/v21/references/annotations/purchaseflowparams.prorationmode.md)
- [Classes](/dev/tools/billing/v21/references/classes.md)
- [AcknowledgeParams](/dev/tools/billing/v21/references/classes/acknowledgeparams.md)
- [AcknowledgeParams.Builder](/dev/tools/billing/v21/references/classes/acknowledgeparams.builder.md)
- [ConsumeParams](/dev/tools/billing/v21/references/classes/consumeparams.md)
- [ConsumeParams.Builder](/dev/tools/billing/v21/references/classes/consumeparams.builder.md)
- [IapResult](/dev/tools/billing/v21/references/classes/iapresult.md)
- [IapResult.Builder](/dev/tools/billing/v21/references/classes/iapresult.builder.md)
- [ProductDetail](/dev/tools/billing/v21/references/classes/productdetail.md)
- [ProductDetailsParams](/dev/tools/billing/v21/references/classes/productdetailsparams.md)
- [ProductDetailsParams.Builder](/dev/tools/billing/v21/references/classes/productdetailsparams.builder.md)
- [PurchaseClient](/dev/tools/billing/v21/references/classes/purchaseclient.md)
- [PurchaseClient.Builder](/dev/tools/billing/v21/references/classes/purchaseclient.builder.md)
- [PurchaseData](/dev/tools/billing/v21/references/classes/purchasedata.md)
- [PurchaseFlowParams](/dev/tools/billing/v21/references/classes/purchaseflowparams.md)
- [PurchaseFlowParams.Builder](/dev/tools/billing/v21/references/classes/purchaseflowparams.builder.md)
- [RecurringProductParams](/dev/tools/billing/v21/references/classes/recurringproductparams.md)
- [RecurringProductParams.Builder](/dev/tools/billing/v21/references/classes/recurringproductparams.builder.md)
- [SubscriptionParams](/dev/tools/billing/v21/references/classes/subscriptionparams.md)
- [SubscriptionParams.Builder](/dev/tools/billing/v21/references/classes/subscriptionparams.builder.md)
- [SubscriptionUpdateParams](/dev/tools/billing/v21/references/classes/subscriptionupdateparams.md)
- [SubscriptionUpdateParams.Builder](/dev/tools/billing/v21/references/classes/subscriptionupdateparams.builder.md)
- [Interfaces](/dev/tools/billing/v21/references/interfaces.md)
- [AcknowledgeListener](/dev/tools/billing/v21/references/interfaces/acknowledgelistener.md)
- [ConsumeListener](/dev/tools/billing/v21/references/interfaces/consumelistener.md)
- [IapResultListener](/dev/tools/billing/v21/references/interfaces/iapresultlistener.md)
- [ProductDetailsListener](/dev/tools/billing/v21/references/interfaces/productdetailslistener.md)
- [PurchaseClientStateListener](/dev/tools/billing/v21/references/interfaces/purchaseclientstatelistener.md)
- [PurchasesListener (deprecated)](/dev/tools/billing/v21/references/interfaces/purchaseslistener-deprecated.md)
- [PurchasesUpdatedListener](/dev/tools/billing/v21/references/interfaces/purchasesupdatedlistener.md)
- [QueryPurchasesListener](/dev/tools/billing/v21/references/interfaces/querypurchaseslistener.md)
- [RecurringProductListener](/dev/tools/billing/v21/references/interfaces/recurringproductlistener.md)
- [StoreInfoListener](/dev/tools/billing/v21/references/interfaces/storeinfolistener.md)