...UniswapExchangeLiks(exchange).sync();
validate the address
```
```js
ERC20like(token).decimals();
```
## can the call be hooked
is there a way for an attacker to gain control of your execution
```
contract Caller{
fallback() external{
call...
}
}
```
```
contract BadTok...
...cipient, uint256 amount) private {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
if (sender == uniswapV2Pair) {
// Buy transaction
uint256 fee = a...