_returnDust doesn't check the return value after call

Lines of code Vulnerability details Impact returnDust doesn't check that the call has been sucesfully. For example, if the buyer is a contract could fail during the reception but due to returnDust doesn't check the return value to revert the transaction in case of failure the tokens could be...

_returnDust does not revert ether transfer failure

Lines of code Vulnerability details Impact In function returnDust the return value of call is not checked for success. If a user had sent excess ether or if an order in a bulk order had failed, and if the call fails ether will remain in the contract. Users who execute orders later will be able to...