{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://qrtrust.local/contracts/event-envelope.schema.json",
  "title": "QR Trust network event envelope",
  "type": "object",
  "required": [
    "event_id",
    "type",
    "occurred_at",
    "root_program_id",
    "artifact_id",
    "artifact_hash",
    "version"
  ],
  "properties": {
    "event_id": {
      "type": "string",
      "minLength": 1
    },
    "type": {
      "type": "string",
      "minLength": 1
    },
    "occurred_at": {
      "type": "string",
      "format": "date-time"
    },
    "root_program_id": {
      "type": "string",
      "pattern": "^(root:|control-plane$)"
    },
    "delegated_authority_id": {
      "type": "string",
      "pattern": "^authority:"
    },
    "issuer_id": {
      "type": "string",
      "pattern": "^issuer:"
    },
    "destination_policy_id": {
      "type": "string",
      "pattern": "^policy:"
    },
    "artifact_id": {
      "type": "string",
      "minLength": 1
    },
    "artifact_hash": {
      "type": "string",
      "pattern": "^sha256:"
    },
    "artifact_ref": {
      "type": "string"
    },
    "version": {
      "type": "integer",
      "minimum": 1
    },
    "previous_version": {
      "type": "integer",
      "minimum": 1
    },
    "reason": {
      "type": "string"
    }
  },
  "additionalProperties": false
}