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| author | Denton Liu <liu.denton+github@gmail.com> | 2016-08-25 03:06:54 +0800 |
|---|---|---|
| committer | Denton Liu <liu.denton+github@gmail.com> | 2016-08-25 03:16:57 +0800 |
| commit | 56558c0db2ad1e64aa81aaa05820388c2ba65a45 (patch) | |
| tree | e3800fc37156f18ffb16b1215a4ec9f633906186 | |
| parent | 876b39e8e55c41ffc848dbb0f0210bde62dd511d (diff) | |
| download | dexon-solidity-56558c0db2ad1e64aa81aaa05820388c2ba65a45.tar.gz dexon-solidity-56558c0db2ad1e64aa81aaa05820388c2ba65a45.tar.zst dexon-solidity-56558c0db2ad1e64aa81aaa05820388c2ba65a45.zip | |
Check for overflow
| -rw-r--r-- | std/StandardToken.sol | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/std/StandardToken.sol b/std/StandardToken.sol index d2567fec..db453492 100644 --- a/std/StandardToken.sol +++ b/std/StandardToken.sol @@ -12,7 +12,7 @@ contract StandardToken is Token { } function transfer(address _to, uint256 _value) returns (bool success) { - if (balanceOf[msg.sender] >= _value) { + if (balanceOf[msg.sender] >= _value && balanceOf[_to] + _value >= balanceOf[_to]) { balanceOf[msg.sender] -= _value; balanceOf[_to] += _value; Transfer(msg.sender, _to, _value); @@ -24,7 +24,7 @@ contract StandardToken is Token { } function transferFrom(address _from, address _to, uint256 _value) returns (bool success) { - if (allowance[_from][msg.sender] >= _value) { + if (allowance[_from][msg.sender] >= _value && balanceOf[_to] + _value >= balanceOf[_to]) { allowance[_from][msg.sender] -= _value; balanceOf[_to] += _value; Transfer(_from, _to, _value); |