{
  "$id": "https://filecoin.io/oni/schemas/test-vector.json",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "a filecoin VM test vector",
  "type": "object",
  "definitions": {
    "hex": {
      "title": "hex value",
      "description": "a hex value prefixed with 0x, and accepting only lowercase characters; 0x represents an empty byte array",
      "type": "string",
      "pattern": "0x[0-9a-f]*",
      "examples": [
        "0xa1b2c3",
        "0x"
      ]
    },
    "meta": {
      "title": "metadata",
      "description": "metadata about this test vector, such as its id, version, data about its generation, etc.",
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "id": {
          "title": "a unique identifier that identifies this test vector",
          "type": "string"
        },
        "version": {
          "title": "the version of this test vector",
          "type": "string"
        },
        "description": {
          "title": "an optional description of the test vector",
          "type": "string"
        },
        "comment": {
          "title": "optional comments about this test vector, e.g. applicability, hints, rationale, etc.",
          "type": "string"
        },
        "gen": {
          "title": "generation metadata",
          "description": "metadata about how this test vector was generated",
          "type": "object",
          "additionalProperties": false,
          "properties": {
            "source": {
              "type": "string",
              "examples": [
                "lotus",
                "dsl"
              ]
            },
            "version": {
              "type": "string",
              "examples": [
                "0.4.1+git.27d74337+api0.8.1"
              ]
            }
          }
        }
      }
    },
    "state_tree": {
      "additionalProperties": false,
      "required": [
        "root_cid"
      ],
      "properties": {
        "root_cid": {
          "additionalProperties": false,
          "required": [
            "/"
          ],
          "properties": {
            "/": {
              "type": "string"
            }
          }
        }
      }
    },
    "receipt": {
      "type": "object",
      "required": [
        "exit_code",
        "return",
        "gas_used"
      ],
      "additionalProperties": false,
      "properties": {
        "exit_code": {
          "type": "number"
        },
        "return": {
          "$ref": "#/definitions/hex"
        },
        "gas_used": {
          "type": "number"
        }
      }
    },
    "preconditions": {
      "title": "execution preconditions",
      "description": "preconditions that need to be applied and satisfied before this test vector can be executed",
      "additionalProperties": false,
      "properties": {
        "epoch": {
          "type": "integer"
        },
        "state_tree": {
          "title": "state tree to seed",
          "description": "state tree to seed before applying this test vector; mapping of actor addresses => serialized state",
          "$ref": "#/definitions/state_tree"
        }
      }
    },
    "postconditions": {
      "title": "execution preconditions",
      "description": "postconditions that need to be satisfied after execution for this test vector to pass",
      "additionalProperties": false,
      "properties": {
        "state_tree": {
          "title": "state tree postconditions",
          "description": "state tree postconditions that must be true for this test vector to pass",
          "$ref": "#/definitions/state_tree"
        },
        "receipts": {
          "title": "receipts to match",
          "description": "receipts to match, required when using messages-class test vectors; length of this array MUST be equal to length of apply_messages",
          "type": "array",
          "items": {
            "$ref": "#/definitions/receipt"
          }
        }
      }
    },
    "apply_messages": {
      "title": "messages to apply, along with the receipt to expect for each",
      "type": "array",
      "items": {
        "$ref": "#/definitions/hex"
      }
    }
  },
  "required": [
    "class"
  ],
  "properties": {
    "class": {
      "title": "test vector class",
      "description": "test vector class; depending on the value, the apply_* property to provide (and its schema) will vary; the relevant apply property is apply_[class]",
      "type": "string",
      "enum": [
        "messages",
        "block",
        "tipset",
        "chain"
      ]
    },
    "selector": {
      "title": "selector the driver can use to determine if this test vector applies",
      "description": "format TBD",
      "type": "string"
    },
    "_meta": {
      "$ref": "#/definitions/meta"
    },
    "car_bytes": {
      "title": "car containing state trees",
      "description": "the gzipped, hex-encoded CAR containing the pre- and post-condition state trees for this test vector",
      "$ref": "#/definitions/hex"
    },
    "preconditions": {
      "$ref": "#/definitions/preconditions"
    },
    "postconditions": {
      "$ref": "#/definitions/postconditions"
    }
  },
  "allOf": [
    {
      "if": {
        "properties": {
          "class": {
            "const": "messages"
          }
        }
      },
      "then": {
        "required": [
          "apply_messages"
        ],
        "properties": {
          "apply_messages": {
            "$ref": "#/definitions/apply_messages"
          }
        }
      }
    }
  ]
}