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Fix some possible overflows

This commit is contained in:
Jordi Baylina 2017-05-02 15:22:19 +02:00
parent 31bce217fb
commit 95adb311c9
1 changed files with 3 additions and 0 deletions
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3
contracts/MiniMeToken.sol
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@ -227,6 +227,7 @@ contract MiniMeToken is Controlled {
// Then update the balance array with the new value for the address
// receiving the tokens
var previousBalanceTo = balanceOfAt(_to, block.number);
if (previousBalanceTo + _amount < previousBalanceTo) throw; // Check for overflow
updateValueAtNow(balances[_to], previousBalanceTo + _amount);
// An event to make the transfer easy to find on the blockchain
@ -428,8 +429,10 @@ contract MiniMeToken is Controlled {
function generateTokens(address _owner, uint _amount
) onlyController returns (bool) {
uint curTotalSupply = getValueAt(totalSupplyHistory, block.number);
if (curTotalSupply + _amount < curTotalSupply) throw; // Check for overflow
updateValueAtNow(totalSupplyHistory, curTotalSupply + _amount);
var previousBalanceTo = balanceOf(_owner);
if (previousBalanceTo + _amount < previousBalanceTo) throw; // Check for overflow
updateValueAtNow(balances[_owner], previousBalanceTo + _amount);
Transfer(0, _owner, _amount);
return true;