event Transfer(address indexed from, address indexed to, uint256 value);

event Approval(address indexed owner, address indexed spender, uint256 value);

event Deposit(bytes from, address indexed to, uint256 value);

event Withdrawal(address indexed from, bytes to, uint256 value, uint256 gasFee, uint256 protocolFlatFee);

event UpdatedSystemContract(address systemContract);

event UpdatedGateway(address gateway);

event UpdatedGasLimit(uint256 gasLimit);

event UpdatedProtocolFlatFee(uint256 protocolFlatFee);