{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "contract/ingest/common.schema.json",
  "type": "object",
  "required": ["v", "id", "type", "ts", "deviceId", "payload"],
  "additionalProperties": false,
  "properties": {
    "v": {
      "type": "integer",
      "const": 1
    },
    "id": {
      "type": "string",
      "minLength": 1
    },
    "type": {
      "type": "string",
      "enum": ["telemetry", "event"]
    },
    "ts": {
      "type": "integer",
      "minimum": 1600000000000,
      "description": "Unix time in milliseconds (UTC)"
    },
    "deviceId": {
      "type": "string",
      "minLength": 1
    },
    "payload": {
      "type": "object"
    },
    "meta": {
      "type": "object",
      "additionalProperties": true
    }
  }
}