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Merge pull request #188 from jdetychey/patch-3

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fix for short address attack
This commit is contained in:
Manuel Aráoz
2017-04-11 17:02:24 -03:00
committed by GitHub
parent d1f63f5c7e 5d75264f0f
commit 22018fd374
1 changed files with 9 additions and 1 deletions
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10
contracts/token/BasicToken.sol
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@ -13,7 +13,15 @@ contract BasicToken is ERC20Basic, SafeMath {
mapping(address => uint) balances;
function transfer(address _to, uint _value) {
/*
* Fix for the ERC20 short address attack
*/
modifier onlyPayloadSize(uint size) {
assert(msg.data.length >= size + 4);
_;
}
function transfer(address _to, uint _value) onlyPayloadSize(2 * 32) {
balances[msg.sender] = safeSub(balances[msg.sender], _value);
balances[_to] = safeAdd(balances[_to], _value);
Transfer(msg.sender, _to, _value);