...ansfer USDT out unless it is removed from the Tether's black address list. And even more the USDT in blacklisted address has the possibility to be destroyed by Tether, once destroyed, the balance will be zero.
(""); // At this point, the caller's code is executed, and can call withdrawBalance again
require(success);
userBalances[msg.sender] = 0;
}
```
由于用户的余额直到函数的最后才设置为 0，第二次（和以后的）调用仍然会成功，并且会一...
... Check whatever you need
clean Clears the cache and deletes all artifacts
compile Compiles the entire project, building all artifacts
console Opens a hardhat console
coverage Generates a code coverage report for tests
fl...