Add clarifying comment to standard token transfer from function

2017-02-27 16:32:42 +01:00
parent 0a5af4b8ac
commit b9257a1092
1 changed files with 4 additions and 1 deletions
--- a/contracts/token/StandardToken.sol
+++ b/contracts/token/StandardToken.sol
@ -26,7 +26,10 @@ contract StandardToken is ERC20, SafeMath {

  function transferFrom(address _from, address _to, uint _value) returns (bool success) {
    var _allowance = allowed[_from][msg.sender];
-    
+
+    // Check is not needed because safeSub(_allowance, _value) will already throw if this condition is not met
+    // if (_value > _allowance) throw;
+
    balances[_to] = safeAdd(balances[_to], _value);
    balances[_from] = safeSub(balances[_from], _value);
    allowed[_from][msg.sender] = safeSub(_allowance, _value);