$id: https://schema.beckn.io/Ack/v2.0
$schema: https://json-schema.org/draft/2020-12/schema
title: Ack
description: |
  Synchronous receipt acknowledgement returned for every accepted Beckn request.
  Supports both the v2.0 format (status + signature CounterSignature) and the
  v2.0-rc1 legacy format (ack_status + transaction_id + timestamp) via oneOf
  for backward compatibility.
x-tags: [common]
oneOf:
  - title: Ack v2.0
    description: |
      New v2.0 Ack format carrying an HTTP Counter-Signature proving the receiver
      authenticated, received, and processed the inbound request.
    type: object
    properties:
      status:
        type: string
        enum: [ACK, NACK]
        description: ACK if the request was accepted; NACK if rejected.
      signature:
        $ref: https://schema.beckn.io/CounterSignature/v2.0
        description: |
          Counter-signature proving the receiver authenticated and processed
          the inbound request.
    required: [status, signature]
    additionalProperties: false
  - $ref: https://schema.beckn.io/AckResponse/v2.0