{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://ingest.profit-base.online/exchange/v1/schemas/tombstone.schema.json",
  "title": "Tombstone",
  "description": "A removal in the change feed, kept 90 days, naming who removed the entry.",
  "type": "object",
  "properties": {
    "key": {
      "type": "string",
      "minLength": 1,
      "maxLength": 128,
      "description": "Opaque identifier issued by the Basetool. Clients store and echo it, never parse it."
    },
    "removedAt": {
      "type": "string",
      "format": "date-time",
      "description": "RFC 3339 timestamp in UTC."
    },
    "removedBy": {
      "type": "object",
      "properties": {
        "channel": {
          "type": "string",
          "enum": [
            "web",
            "app",
            "client",
            "system"
          ]
        },
        "clientId": {
          "type": "string",
          "maxLength": 64
        },
        "installationId": {
          "type": "string",
          "minLength": 1,
          "maxLength": 128,
          "description": "The removing installation, when a client removed it."
        }
      },
      "required": [
        "channel"
      ]
    }
  },
  "required": [
    "key",
    "removedAt",
    "removedBy"
  ]
}