Steam

ISteamMicroTxn

ISteamMicroTxn / ISteamMicroTxnSandbox handle the full microtransaction lifecycle — InitTxn, FinalizeTxn, GetReport, RefundTxn, QueryTxn — used by F2P and live-service titles.

GitHub

Other Resources

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API Reference
https://partner.steamgames.com/doc/webapi/ISteamMicroTxn

API entry from apis.yml

apis.yml Raw ↑ 
aid: steam:steam-microtxn-api
name: ISteamMicroTxn
tags:
- Microtransactions
- Payments
- Refunds
properties:
- url: https://partner.steamgames.com/doc/webapi/ISteamMicroTxn
  type: API Reference
description: ISteamMicroTxn / ISteamMicroTxnSandbox handle the full microtransaction lifecycle — InitTxn,
  FinalizeTxn, GetReport, RefundTxn, QueryTxn — used by F2P and live-service titles.