{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "DHT Protocol Schema",
  "type": "object",
  "oneOf": [
    { "$ref": "#/definitions/discovery" },
    { "$ref": "#/definitions/peerExchangeRequest" },
    { "$ref": "#/definitions/peerExchangeResponse" }
  ],
  "definitions": {
    "interface": {
      "type": "object",
      "required": ["addr", "nonce", "pow_hash", "difficulty", "datetime"],
      "properties": {
        "addr": { "type": "string", "pattern": "^(tcp|udp)://.+" },
        "nonce": { "type": "integer", "minimum": 0 },
        "pow_hash": { "type": "string" },
        "difficulty": { "type": "integer", "minimum": 1 },
        "datetime": { "type": "string", "format": "date-time" },
        "type": {
          "type": "string",
          "enum": ["localhost", "internet", "yggdrasil", "i2p"],
          "pattern": "^(lan:[0-9]{1,3}(\\.[0-9]{1,3}){3})$"
        }
      }
    },
    "peer": {
      "type": "object",
      "required": ["id", "name", "pubkey", "addresses"],
      "properties": {
        "id": { "type": "string" },
        "name": { "type": "string" },
        "pubkey": { "type": "string" },
        "addresses": {
          "type": "array",
          "items": { "$ref": "#/definitions/interface" }
        }
      }
    },
    "discovery": {
      "type": "object",
      "required": ["type", "id", "name", "pubkey", "addresses"],
      "properties": {
        "type": { "const": "DISCOVERY" },
        "id": { "type": "string" },
        "name": { "type": "string" },
        "pubkey": { "type": "string" },
        "addresses": {
          "type": "array",
          "items": { "$ref": "#/definitions/interface" }
        }
      }
    },
    "peerExchangeRequest": {
      "type": "object",
      "required": ["type", "id", "name", "addresses"],
      "properties": {
        "type": { "const": "PEER_EXCHANGE_REQUEST" },
        "id": { "type": "string" },
        "name": { "type": "string" },
        "addresses": {
          "type": "array",
          "items": { "$ref": "#/definitions/interface" }
        }
      }
    },
    "peerExchangeResponse": {
      "type": "array",
      "items": { "$ref": "#/definitions/peer" }
    }
  }
}