---
title: "Changes to Process a Purchase Transaction"
method: POST
path: "/payment/purchase"
---

# Changes to Process a Purchase Transaction

`POST /payment/purchase`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 1 of 2 revisions.

- **2026-11-03** `95aef350fef4`: 4 breaking, 1 warning

## Changes

- **2026-11-03** `95aef350fef4`: 4 breaking, 1 warning
  - the `allOf[subschema #1: PaymentRequest]/allOf[subschema #2]/invoice/allOf[subschema #2: Invoice Create after transaction processing]/lineItems/items/discountAmount` request property format changed from no format to `float`
  - the `allOf[subschema #1: PaymentRequest]/allOf[subschema #2]/invoice/allOf[subschema #2: Invoice Create after transaction processing]/lineItems/items/price` request property format changed from no format to `float`
  - the `allOf[subschema #1: PaymentRequest]/allOf[subschema #2]/invoice/allOf[subschema #2: Invoice Create after transaction processing]/lineItems/items/quantity` request property format changed from no format to `float`
  - the `allOf[subschema #1: PaymentRequest]/allOf[subschema #2]/invoice/allOf[subschema #2: Invoice Create after transaction processing]/lineItems/items/taxAmount` request property format changed from no format to `float`
  - removed the request property `allOf[subschema #1: PaymentRequest]/allOf[subschema #2]/invoice/allOf[subschema #2: Invoice Create after transaction processing]/lineItems/items/total`

---

[Operation](https://skmtc.dev/helcim/apis/the-helcim-api/docs/payment/purchase/post.md) - [API](https://skmtc.dev/helcim/apis/the-helcim-api.md) - [Page](https://skmtc.dev/helcim/apis/the-helcim-api/changes/payment/purchase/post)