{
    "Header": {
        "LogsBloomFieldIdxOffset": 70,
        "HashFieldIdx": 50,
        "HeaderSizeFieldIdx": 51,
        "ExtraDataLenFieldIdx": 52
    },
    "Tx": {
        "FieldIdxOffset": 0,
        "CalldataIdxOffset": 100,
        "ContractDataIdxOffset": 100000,
        "TxTypeFieldIdx": 51,
        "BlockNumberFieldIdx": 52,
        "TxIndexFieldIdx": 53,
        "FunctionSelectorFieldIdx": 54,
        "CalldataHashFieldIdx": 55,
        "DataLengthFieldIdx": 56,
        "ContractDeploySelectorValue": 60,
        "NoCalldataSelectorValue": 61
    },
    "Receipt": {
        "FieldIdxOffset": 0,
        "LogIdxOffset": 100,
        "TopicIdxOffset": 0,
        "DataIdxOffset": 100,
        "LogsBloomIdxOffset": 70,
        "AddressIdx": 50,
        "TxTypeFieldIdx": 51,
        "BlockNumberFieldIdx": 52,
        "TxIndexFieldIdx": 53
    }
}