[
  {
    "bytes": "32",
    "label": "preimageLengths",
    "offset": 0,
    "slot": "0",
    "type": "mapping(bytes32 => uint256)"
  },
  {
    "bytes": "32",
    "label": "preimageParts",
    "offset": 0,
    "slot": "1",
    "type": "mapping(bytes32 => mapping(uint256 => bytes32))"
  },
  {
    "bytes": "32",
    "label": "preimagePartOk",
    "offset": 0,
    "slot": "2",
    "type": "mapping(bytes32 => mapping(uint256 => bool))"
  }
]