{
    "definitions": {},
    "$schema": "http://json-schema.org/draft-07/schema#",
    "$id": "http://example.com/root.json",
    "type": "object",
    "title": "Base Message Schema",
    "required": [
      "id",
      "type",
      "from",
      "to",
      "payload"
    ],
    "additionalProperties": false,
    "properties": {
      "id": {
        "$id": "#/properties/id",
        "type": "string",
        "title": "id",
        "description": "Message identifier (used to track the request-response chain)",
        "examples": [
          "abcd"
        ],
        "pattern": "^(.*)$"
      },
      "type": {
        "$id": "#/properties/type",
        "type": "string",
        "title": "type",
        "description": "Type of message (used to determine which extension this message belongs to)",
        "examples": [
          "profile:register",
          "profile:login",
          "incorrectMessageType:error"
        ],
        "pattern": "^(.*)$"
      },
      "from": {
        "$id": "#/properties/from",
        "type": "string",
        "title": "from",
        "description": "From which entity this message is send. May be set to \"anonymous\" value, if action doesn't require authorization. This is EntityID",
        "examples": [
          "396277b7dcd0f1173f2007baa604de7593529cc3fbf335fb7924851cb25c1fdf",
          "@juliet@396277b7dcd0f1173f2007baa604de7593529cc3fbf335fb7924851cb25c1fdf",
          "#chpok@b9966d89028b120145dad38961bed0b3b2eac0a2915c0bb1665ffcc1586f6f59",
          "anonymous"
        ],
        "pattern": "^(.*)$"
      },
      "to": {
        "$id": "#/properties/to",
        "type": "string",
        "title": "to",
        "description": "Message recipient. This is Entity ID.",
        "examples": [
          "@juliet@02a6f23250868e903ff62e99e664a5717e945ca8153bf0ebc4f505cbe3a0860c",
          "#white_house_garden@8baef2426dc6a92e16d39d79d90ae6d5a0080aaeccc5f02f1e83a959bc4d0be7",
          "%phone:1234567890@6dfea40d98f71b3191f94c31af887a00eaeef2fe3501226e3fbb302fc5269eec",
          "@romeo@cadmium.im"
        ],
        "pattern": "^(.*)$"
      },
      "payload": {
        "$id": "#/properties/payload",
        "type": "object",
        "title": "payload",
        "description": "Message payload (used to store extra information in message, list of permissible fields in the payload depends on \"type\" field)",
        "patternProperties": {
          "^(.*)$": {}
        }
      }
    }
  }