EBANX Payment Notifications

asyncapi: '2.6.0'
info:
  title: EBANX Payment Notifications
  version: '1.0'
  description: >-
    EBANX sends HTTP POST callbacks to a merchant-configured Notification URL
    whenever a payment changes state — approved, pending, cancelled, refunded,
    or chargeback. Each request includes a digital signature header so the
    merchant can verify authenticity, and the payload identifies the affected
    payment hash so the merchant can re-query the Direct API for full details.
  contact:
    name: EBANX Sales Engineering
    email: sales.engineering@ebanx.com
    url: https://docs.ebanx.com/docs/payments/guides/features/payment-notifications/
servers:
  merchant:
    url: '{merchantNotificationUrl}'
    protocol: https
    description: Webhook endpoint configured by the merchant in the EBANX dashboard under Integrations.
    variables:
      merchantNotificationUrl:
        default: https://example.com/ebanx/notifications
        description: HTTPS URL the merchant set as the Notification URL.
channels:
  payment.update:
    description: Payment status changed (approved, pending, cancelled, expired).
    subscribe:
      operationId: receivePaymentUpdate
      summary: Receive payment status update
      message:
        $ref: '#/components/messages/PaymentNotification'
  payment.refund:
    description: Refund created, approved, or rejected.
    subscribe:
      operationId: receiveRefundNotification
      summary: Receive refund status update
      message:
        $ref: '#/components/messages/RefundNotification'
  payment.chargeback:
    description: Chargeback opened, won, or lost on a card payment.
    subscribe:
      operationId: receiveChargebackNotification
      summary: Receive chargeback notification
      message:
        $ref: '#/components/messages/ChargebackNotification'
  payment.med-pix:
    description: Pix MED (Mecanismo Especial de Devolução) return request lifecycle event.
    subscribe:
      operationId: receiveMedPixNotification
      summary: Receive Pix MED notification
      message:
        $ref: '#/components/messages/MedPixNotification'
components:
  messages:
    PaymentNotification:
      name: PaymentNotification
      contentType: application/x-www-form-urlencoded
      headers:
        type: object
        properties:
          X-EBANX-Signature:
            type: string
            description: Digital signature used by the merchant to verify the message authenticity.
      payload:
        type: object
        properties:
          notification_type: { type: string, enum: [update, refund, chargeback] }
          operation: { type: string, enum: [payment_status_change] }
          hash: { type: string, description: 'EBANX payment hash.' }
          merchant_payment_code: { type: string }
    RefundNotification:
      name: RefundNotification
      payload:
        type: object
        properties:
          notification_type: { type: string, enum: [refund] }
          operation: { type: string }
          hash: { type: string }
          refund_id: { type: string }
          status: { type: string }
    ChargebackNotification:
      name: ChargebackNotification
      payload:
        type: object
        properties:
          notification_type: { type: string, enum: [chargeback] }
          operation: { type: string }
          hash: { type: string }
          reason_code: { type: string }
          status: { type: string }
    MedPixNotification:
      name: MedPixNotification
      payload:
        type: object
        properties:
          notification_type: { type: string, enum: [med_pix] }
          operation: { type: string }
          hash: { type: string }
          status: { type: string }
          reason: { type: string }