{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://paperspec.scient.ing/schemas/checkpoint.schema.json",
  "title": "Log checkpoint",
  "description": "scienting-checkpoint/1: a signed checkpoint of a team's transparency log, as the parsed form of its signed note; spec/23-log.md.",
  "type": "object",
  "properties": {
    "format": {
      "const": "scienting-checkpoint/1"
    },
    "origin": {
      "type": "string",
      "pattern": "^[^\\n]+$",
      "minLength": 1
    },
    "size": {
      "type": "integer",
      "minimum": 0
    },
    "root": {
      "$ref": "common.schema.json#/$defs/hash"
    },
    "signatures": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "name": {
            "$ref": "common.schema.json#/$defs/key"
          },
          "key_hash": {
            "type": "string",
            "pattern": "^[0-9a-f]{8}$"
          },
          "value": {
            "$ref": "common.schema.json#/$defs/base64"
          }
        },
        "required": [
          "name",
          "key_hash",
          "value"
        ],
        "additionalProperties": false
      },
      "minItems": 1
    },
    "note": {
      "type": "string",
      "minLength": 1
    }
  },
  "required": [
    "format",
    "origin",
    "size",
    "root",
    "signatures",
    "note"
  ],
  "additionalProperties": false
}