In FxERC20RootTunnel, there is no option to get bridged tokens back in case the transaction can not be executed on L2

Lines of code Vulnerability details Impact If the transaction on L2 fails to be executed the tokens deposited on L1 will be lost since there is no way to recover them Proof of Concept When calling FxERC20RootTunnel:: withdraw the users deposits a certain amount of tokens to the bridge that he wan...

L1 TO L2 ERC20 TOKEN TRANSFER CAN BE DoS IN THE FxERC20ChildTunnel CONTRACT SINCE A MALICIOUS USER CAN SET THE fxRootTunnel ADDRESS TO AN INVALID ADDRESS

Lines of code Vulnerability details Impact The FxERC20ChildTunnel is a smart contract which is used for the L2 token management. The FxERC20ChildTunnel contract inherits from the FxBaseChildTunnel contract. The FxBaseChildTunnel contract has the validateSender modifier which requires the sender o...