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timelimit-server/docs/api/purchase.md
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2026-06-15 02:00:00 +02:00

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# /purchase
This endpoint is used for handling purchases from the client.
It currently only supports purchases using Google Play in app purchases.
## see
- [premium concept](../concept/premium.md)
## POST /purchase/can-do-purchase
Use this before a purchase to check if a purchase is possible.
### request
see [this JSON schema](../schema/candopurchaserequest.md)
Note that ``type`` is not used at all.
### response
On a invalid request body: HTTP status code 400 Bad request
On a invalid auth token: HTTP status code 401 Unauthorized
On success: a JSON object with the property ``canDoPurchase`` (string), ``googlePlayPublicKey`` (string, base64)
and ``permitDebts`` (boolean, optional, default false).
possible values of ``canDoPurchase``:
- ``yes``
- ``no due to old purchase``
- ``no because not supported by the server``
The ``googlePlayPublicKey`` is the key by which purchases using google play should be signed.
## POST /purchase/finish-purchase-by-debts
Use this to unlock without payment. Limitations apply.
### request
see [this JSON schema](../schema/candopurchaserequest.md)
Note that ``type`` is not used at all.
### response
On a invalid request body: HTTP status code 400 Bad request
On a invalid auth token: HTTP status code 401 Unauthorized
If not granted: HTTP status code 409 Conflict
On success: HTTP status code 200
## POST /purchase/finish-purchase-by-google-play
Use this to report a purchase to the server/ unlock all features after a purchase
using Google Play.
### request
see [this JSON schema](../schema/finishpurchasebygoogleplayrequest.md)
### response
On a invalid request body: HTTP status code 400 Bad request
On a invalid auth token: HTTP status code 401 Unauthorized
On a invalid purchase: HTTP status code 409 Conflict
On success: ``{"ok": true}``
### error handling
- if the purchase was already added (for the same or an other family), then this request is ignored and success is returned