# User balance: Payment

Sent whenever a user makes a payment.

Endpoint: POST user-balance-payment
Version: 1.0

## Request fields (application/json):

  - `notification_type` (string)
    Notification type.

  - `settings` (object)
    Custom project settings (object).

  - `settings.project_id` (integer)
    Project ID. You can find this parameter in your [Publisher Account](https://publisher.xsolla.com/) next to the name of the project.

  - `settings.merchant_id` (integer)
    Merchant ID.

  - `operation_type` (string)
    Type of operation.

  - `id_operation` (integer)
    Operation ID in Xsolla database.

  - `user` (object)
    User details (object).

  - `user.id` (string, required)
    User ID.

  - `user.name` (string)
    Username.

  - `user.email` (string)
    User email.

  - `virtual_currency_balance` (object)
    User balance data (object).

  - `virtual_currency_balance.old_value` (string)
    Balance before transaction.

  - `virtual_currency_balance.new_value` (string)
    Balance after transaction.

  - `virtual_currency_balance.diff` (string)
    Quantity of virtual currency in the purchase.

  - `transaction` (object, required)
    Transaction details (object).

  - `transaction.id` (integer)
    Transaction ID.

  - `transaction.date` (string)
    Date of transaction.

## Response 400 fields (application/json):

  - `error` (object)

  - `error.code` (string)

  - `error.message` (string)


## Response 204 fields

## Response 500 fields