22 lines
584 B
Solidity
22 lines
584 B
Solidity
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/*
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* @source: https://consensys.github.io/smart-contract-best-practices/known_attacks/#front-running-aka-transaction-ordering-dependence
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* @author: consensys
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* @vulnerable_at_lines: 18
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*/
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pragma solidity ^0.4.0;
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contract IntegerOverflowAdd {
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mapping (address => uint256) public balanceOf;
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// INSECURE
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function transfer(address _to, uint256 _value) public{
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/* Check if sender has balance */
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require(balanceOf[msg.sender] >= _value);
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balanceOf[msg.sender] -= _value;
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// <yes> <report> ARITHMETIC
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balanceOf[_to] += _value;
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}
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}
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