[{"check": "reentrancy", "impact": "High", "confidence": "Medium", "description": "Reentrancy in Reentrancy.withdrawBalance (tests/reentrancy.sol#14-21):\n\tExternal calls:\n\t- ! (msg.sender.call.value(userBalance[msg.sender])()) (tests/reentrancy.sol#17-19)\n\tState variables written after the call(s):\n\t- userBalance (tests/reentrancy.sol#20)\n", "elements": [{"type": "function", "name": "withdrawBalance", "source_mapping": {"start": 299, "length": 314, "filename": "tests/reentrancy.sol", "lines": [14, 15, 16, 17, 18, 19, 20, 21]}, "contract": {"type": "contract", "name": "Reentrancy", "source_mapping": {"start": 26, "length": 1678, "filename": "tests/reentrancy.sol", "lines": [3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51]}}}, {"type": "external_calls", "expression": "! (msg.sender.call.value(userBalance[msg.sender])())", "source_mapping": {"start": 478, "length": 92, "filename": "tests/reentrancy.sol", "lines": [17, 18, 19]}}, {"type": "variables_written", "name": "userBalance", "expression": "userBalance[msg.sender] = 0", "source_mapping": {"start": 579, "length": 27, "filename": "tests/reentrancy.sol", "lines": [20]}}]}]