> 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/eng/tools/billing/v21/references/annptations.md).

# Annotations

* [\[EN\]PurchaseClient.ConnectionState](/dev/eng/tools/billing/v21/references/annptations/purchaseclient.connectionstate.md)
* [\[EN\]PurchaseClient.FeatureType](/dev/eng/tools/billing/v21/references/annptations/purchaseclient.featuretype.md)
* [\[EN\]PurchaseClient.ProductType](/dev/eng/tools/billing/v21/references/annptations/purchaseclient.producttype.md)
* [\[EN\]PurchaseClient.RecurringAction](/dev/eng/tools/billing/v21/references/annptations/purchaseclient.recurringaction.md)
* [\[EN\]PurchaseClient.ResponseCode](/dev/eng/tools/billing/v21/references/annptations/purchaseclient.responsecode.md)
* [\[EN\]PurchaseData.AcknowledgeState](/dev/eng/tools/billing/v21/references/annptations/purchasedata.acknowledgestate.md)
* [\[EN\]PurchaseData.PurchaseState](/dev/eng/tools/billing/v21/references/annptations/purchasedata.purchasestate.md)
* [\[EN\]PurchaseData.RecurringState](/dev/eng/tools/billing/v21/references/annptations/purchasedata.recurringstate.md)
* [\[EN\]PurchaseFlowParams.ProrationMode](/dev/eng/tools/billing/v21/references/annptations/purchaseflowparams.prorationmode.md)