Protect transferFrom against short hand attack.

8 years ago · 964185dec3
parent e1cf602487
commit 964185dec3
1 changed files with 1 additions and 1 deletions
--- a/contracts/token/StandardToken.sol
+++ b/contracts/token/StandardToken.sol
@ -16,7 +16,7 @@ contract StandardToken is BasicToken, ERC20 {

  mapping (address => mapping (address => uint)) allowed;

-  function transferFrom(address _from, address _to, uint _value) {
+  function transferFrom(address _from, address _to, uint _value) onlyPayloadSize(3 * 32) {
    var _allowance = allowed[_from][msg.sender];

    // Check is not needed because sub(_allowance, _value) will already throw if this condition is not met