{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://xcim.org/schemas/0.1/status-proof.schema.json",
  "title": "XCIM 0.1 Compressed Sparse-Merkle Status Proof",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "state_key", "presence", "state_value", "tree_depth", "sibling_bitmap",
    "non_empty_siblings", "state_root", "batch_sequence", "this_update", "next_update", "anchor_reference"
  ],
  "properties": {
    "state_key": { "$ref": "#/$defs/hash" },
    "presence": { "type": "boolean" },
    "state_value": {
      "oneOf": [
        { "$ref": "state-value.schema.json" },
        { "type": "null" }
      ]
    },
    "tree_depth": { "const": 256 },
    "sibling_bitmap": {
      "type": "string",
      "minLength": 43,
      "maxLength": 43,
      "pattern": "^[A-Za-z0-9_-]+$",
      "description": "Unpadded base64url encoding of exactly 32 bitmap bytes."
    },
    "non_empty_siblings": {
      "type": "array",
      "maxItems": 256,
      "items": { "$ref": "#/$defs/hash" }
    },
    "state_root": { "$ref": "#/$defs/hash" },
    "batch_sequence": { "type": "integer", "minimum": 0, "maximum": 9007199254740991 },
    "this_update": { "type": "string", "format": "date-time" },
    "next_update": { "type": "string", "format": "date-time" },
    "anchor_reference": { "type": "string", "minLength": 1, "maxLength": 500 }
  },
  "allOf": [
    {
      "if": { "properties": { "presence": { "const": true } }, "required": ["presence"] },
      "then": { "properties": { "state_value": { "$ref": "state-value.schema.json" } } },
      "else": { "properties": { "state_value": { "type": "null" } } }
    }
  ],
  "$defs": {
    "hash": { "type": "string", "minLength": 43, "maxLength": 43, "pattern": "^[A-Za-z0-9_-]+$" }
  }
}