RuntimeExceptions is the correct exception error source is the decoded data.

Note LogicExceptions as defined in PHP documentation implies a modification in the code by the developer.

> Exception that represents error in the program logic. This kind of exception should lead directly to a fix in your code.
http://php.net/manual/en/class.logicexception.php

But the token is a data provided by an external source which is out side of the control of the developer so there is no way of prevent malformed tokens.