# Support for supplier-issued promotion payouts in Supplier and Operator APIs

**Effective from:** 26 May 2025

***

Hub88 now supports win transactions for promotions granted by game suppliers. This enhancement allows delayed promotional payouts (e.g. after tournaments or jackpots), even if the original round is already closed. 

{% hint style="info" %}
This is applicable for Generic Supplier and Operator APIs. 
{% endhint %}

### What is changing? 

We’ve introduced a new optional parameter to the following endpoints:

**In Supplier API**\
[**`POST /supplier/generic/v2/transaction/win`**](https://app.gitbook.com/s/F8iFPgdqAwxIxP5oQMvU/supplier-api-reference/wallet-api#post-supplier-generic-v2-transaction-win) **endpoint**

* `is_supplier_promo` – indicates the win was granted by the game supplier.
  * When true, the transaction is treated as a **freebet** (i.e. `is_free: true` is implied).
  * The `reference_transaction_uuid` becomes optional.
  * The `token` and `game_code` are still required. 
  * An optional promo reference can be passed in the unstructured `meta` field:

    ```json
    "meta": {
      "supplier_promo_info": {
        "promo_reference": "Promo_games_reference"
      }
    }
    ```

**In Operator API**\
[**`POST /transaction/bet`**](https://app.gitbook.com/s/F8iFPgdqAwxIxP5oQMvU/operator-api-reference/wallet-api#post-transaction-bet) **and** [**`POST /transaction/win`**](https://app.gitbook.com/s/F8iFPgdqAwxIxP5oQMvU/operator-api-reference/wallet-api#post-transaction-win) **endpoints:**

* Hub88 forwards the `is_supplier_promo` flag to the Operator API.
* In `meta`, `supplier_promo_info` will be included only if the supplier sends it.
* Operator should NOT validate the expiration of the `token` received, as bet and win transactions could belong to an inactive/staled session on operator side. `token` should be verified to be valid in case `is_supplier_promo` is sent.

#### Behaviour overview

* For bet transactions, operator will receive 0 bet transaction with `is_supplier_promo: true`  flag
* For win transactions, operator will receive transaction with `is_supplier_promo: true` and corresponding promo win amount.

### Why is it changing?

This update enables payout flexibility for promotions originating from game suppliers. It ensures players can receive their rewards even if the original gameplay session is no longer active, while maintaining compatibility across Supplier and Operator APIs.