{
    "Function": "isValidPromiseCallbackLength",
    "File": "contracts/contracts/core/promise/libraries/PromiseMessage.sol",
    "Parent Contracts": [],
    "High-Level Calls": [
        "TypedMemView"
    ],
    "Internal Calls": [
        "lengthOfReturnData"
    ],
    "Library Calls": [
        "len"
    ],
    "Low-Level Calls": [],
    "Code": "function isValidPromiseCallbackLength(bytes29 _view) internal pure returns (bool) {\n    uint256 _len = _view.len();\n    if (_len <= LENGTH_RETURNDATA_START) {\n      return false;\n    }\n    uint256 _length = lengthOfReturnData(_view);\n    // before = 1 byte identifier + 32 bytes transferId + 20 bytes callback address + 1 byte success + 32 bytes length + x bytes data\n    // nonzero return data\n    return _length > 0 && (RETURNDATA_START + _length) == _len;\n  }"
}