function safeWithdrawal() public afterDeadline {
if (!fundingGoalReached) {
uint amount = balanceOf[msg.sender];
balanceOf[msg.sender] = 0;
if (amount > 0) {
if (msg.sender.send(amount)) { //is this a condition or a command?
emit FundTransf
我在一个ico上工作,我得到了这个代码,众筹是与代币,但我想与以太,我怎么做呢?
IERC20 public dai = IERC20(0x6B175474E89094C44Da98b954EedeAC495271d0F);
function buy(uint etherAmount)
external
icoActive() {
require(
etherAmount >= minPurchase && etherAmount <= maxPurchase,
'have to buy between mi