transfer to zero should decerease supply (burn action)

2018-06-30 00:44:40 -03:00 · 2018-06-30 00:44:40 -03:00 · 8b092b421e
parent 264f30ff2b
commit 8b092b421e
1 changed files with 3 additions and 0 deletions
--- a/contracts/token/StandardToken.sol
+++ b/contracts/token/StandardToken.sol
@ -93,6 +93,9 @@ contract StandardToken is ERC20Token {
        if (balances[_from] >= _value && _value > 0) {
            balances[_from] -= _value;
            balances[_to] += _value;
+            if(_to == address(0)) {
+                supply -= _value;
+            }
            emit Transfer(_from, _to, _value);
            return true;
        } else {