{
  "lexicon": 1,
  "id": "dev.knotless.updateSeen",
  "description": "Says the asking account has seen its notifications up to a time.",
  "defs": {
    "main": {
      "type": "procedure",
      "description": "Keeps, on the appview, when the asking account last saw its notifications: those from then on are unread. A time before the one kept leaves it. Requires authentication: a service token, or the session cookie the pages' login sets, from the pages themselves.",
      "input": {
        "encoding": "application/json",
        "schema": {
          "type": "object",
          "required": ["seenAt"],
          "properties": {
            "seenAt": { "type": "string", "format": "datetime", "description": "The newest notification seen, by its createdAt." }
          }
        }
      },
      "output": {
        "encoding": "application/json",
        "schema": {
          "type": "object",
          "required": ["seenAt"],
          "properties": {
            "seenAt": { "type": "string", "format": "datetime", "description": "When it last saw them now, as kept." }
          }
        }
      },
      "errors": [{ "name": "AuthenticationRequired", "description": "No account asks." }]
    }
  }
}