{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://api-evangelist.com/schemas/masstransit/masstransit-message-envelope.json",
  "title": "MassTransit Message Envelope",
  "description": "Schema for the MassTransit message envelope format. All messages sent through MassTransit are wrapped in this envelope containing routing, correlation, and metadata information.",
  "type": "object",
  "properties": {
    "messageId": {
      "type": "string",
      "format": "uuid",
      "description": "Unique identifier for the message"
    },
    "requestId": {
      "type": "string",
      "format": "uuid",
      "description": "Request identifier for request/response conversations"
    },
    "correlationId": {
      "type": "string",
      "format": "uuid",
      "description": "Correlation identifier for tracking related messages"
    },
    "conversationId": {
      "type": "string",
      "format": "uuid",
      "description": "Conversation identifier (created on first message, propagated through chain)"
    },
    "initiatorId": {
      "type": "string",
      "format": "uuid",
      "description": "The messageId of the message that initiated this message"
    },
    "sourceAddress": {
      "type": "string",
      "format": "uri",
      "description": "The address of the endpoint that sent the message"
    },
    "destinationAddress": {
      "type": "string",
      "format": "uri",
      "description": "The destination endpoint address"
    },
    "responseAddress": {
      "type": "string",
      "format": "uri",
      "description": "The address for response messages"
    },
    "faultAddress": {
      "type": "string",
      "format": "uri",
      "description": "The address for fault messages"
    },
    "messageType": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "URN-formatted message type identifiers, e.g., urn:message:Namespace:MessageType"
    },
    "message": {
      "type": "object",
      "description": "The actual message payload"
    },
    "expirationTime": {
      "type": "string",
      "format": "date-time",
      "description": "Time at which the message expires"
    },
    "sentTime": {
      "type": "string",
      "format": "date-time",
      "description": "Time when the message was sent"
    },
    "headers": {
      "type": "object",
      "additionalProperties": true,
      "description": "Custom headers as key-value pairs"
    },
    "host": {
      "type": "object",
      "description": "Information about the host that sent the message",
      "properties": {
        "machineName": {
          "type": "string"
        },
        "processName": {
          "type": "string"
        },
        "processId": {
          "type": "integer"
        },
        "assembly": {
          "type": "string"
        },
        "assemblyVersion": {
          "type": "string"
        },
        "frameworkVersion": {
          "type": "string"
        },
        "massTransitVersion": {
          "type": "string"
        },
        "operatingSystemVersion": {
          "type": "string"
        }
      }
    }
  },
  "required": ["messageId", "messageType", "message"]
}