openapi: 3.1.1
info:
  title: LineageEntry
  version: 2.0.0
  description: A causal attribution record asserting that the Beckn transaction in which this entry appears was triggered by a specific upstream Beckn interaction. Used in Context.lineage at transaction boundaries — when a new transaction is initiated as a direct consequence of an upstream interaction. MUST NOT be included within subsequent steps of the same transaction, and MUST NOT be propagated by downstream responses.
  license:
    name: CC-BY-NC-SA 4.0 International
  contact:
    name: Beckn Labs
    url: https://beckn.io
components:
  schemas:
    LineageEntry:
      $id: https://schema.beckn.io/LineageEntry/v2.0
      $schema: https://json-schema.org/draft/2020-12/schema
      title: LineageEntry
      x-tags:
      - common
      description: A causal attribution record asserting that the Beckn transaction in which this entry appears was triggered by a specific upstream Beckn interaction. Used in Context.lineage at transaction boundaries — when a new transaction is initiated as a direct consequence of an upstream interaction. MUST NOT be included within subsequent steps of the same transaction, and MUST NOT be propagated by downstream responses.
      type: object
      properties:
        action:
          description: The Beckn endpoint of the upstream message that caused this transaction to be initiated.
          $ref: https://schema.beckn.io/BecknEndpoint/v2.0/attributes.yaml#/components/schemas/BecknEndpoint
        transactionId:
          description: The transactionId of the upstream Beckn transaction, taken from its Context.
          type: string
          format: uuid
        messageId:
          description: The messageId of the specific upstream message that directly triggered the creation of this transaction.
          type: string
          format: uuid
        digest:
          description: 'BLAKE2b-512 hash of the upstream message body bytes, encoded in Base64 and prefixed with the algorithm identifier. Format: BLAKE-512={base64EncodedHash}'
          type: string
          pattern: ^BLAKE-512=[A-Za-z0-9+/]+=*$
          example: BLAKE-512=b6lf6lRgOweajukcvcLsagQ2T60+85kRh/Rd2bdS+TG/5ALebOEgDJfyCrre/1+BMu5nA94o4DT3pTFXuUg7sw==
      required:
      - action
      - transactionId
      - messageId
      - digest
      additionalProperties: false