{
  "name": "substrate",
  "description": "These are keys that are always available to the runtime implementation",
  "items": [
    {
      "name": "changesTrieConfig(): `u32`",
      "summary": "Changes trie configuration is stored under this key."
    },
    {
      "name": "childStorageKeyPrefix(): `u32`",
      "summary": "Prefix of child storage keys."
    },
    {
      "name": "code(): `Bytes`",
      "summary": "Wasm code of the runtime."
    },
    {
      "name": "extrinsicIndex(): `u32`",
      "summary": "Current extrinsic index (u32) is stored under this key."
    },
    {
      "name": "heapPages(): `u64`",
      "summary": "Number of wasm linear memory pages required for execution of the runtime."
    }
  ]
}