Wrap Solidity global available variables in functions, to be used in graphs #138
Description
Wrapping in functions makes handling the graph consistent. These will be available as nodes in the graph. The context should actually be the wrapper, e.g.: the PipeGraphInterpreter contract, the wrapper smart contract created for Solidity.
E.g. msg.data -> function msg_data() returns(bytes memory data) { return msg.data }
Details TBD.