# Annotations

* [PurchaseClient.ConnectionState](https://onestore-dev.gitbook.io/dev/cht/tools/billing/v21/references/annotations/purchaseclient.connectionstate)
* [PurchaseClient.FeatureType](https://onestore-dev.gitbook.io/dev/cht/tools/billing/v21/references/annotations/purchaseclient.featuretype)
* [PurchaseClient.ProductType](https://onestore-dev.gitbook.io/dev/cht/tools/billing/v21/references/annotations/purchaseclient.producttype)
* [PurchaseClient.RecurringAction](https://onestore-dev.gitbook.io/dev/cht/tools/billing/v21/references/annotations/purchaseclient.recurringaction)
* [PurchaseClient.ResponseCode](https://onestore-dev.gitbook.io/dev/cht/tools/billing/v21/references/annotations/purchaseclient.responsecode)
* [PurchaseData.AcknowledgeState](https://onestore-dev.gitbook.io/dev/cht/tools/billing/v21/references/annotations/purchasedata.acknowledgestate)
* [PurchaseData.PurchaseState](https://onestore-dev.gitbook.io/dev/cht/tools/billing/v21/references/annotations/purchasedata.purchasestate)
* [PurchaseData.RecurringState](https://onestore-dev.gitbook.io/dev/cht/tools/billing/v21/references/annotations/purchasedata.recurringstate)
* [PurchaseFlowParams.ProrationMode](https://onestore-dev.gitbook.io/dev/cht/tools/billing/v21/references/annotations/purchaseflowparams.prorationmode)