Create API to check for message inclusion

[evan-forbes]

Summary

Create an API to check for messages inclusion.

Details

The first step has already been done by writing code to find subtree root paths. The next step should be to create an API that allows us to easily check for message inclusion given the original data square, the position of the message in question, the size of that message, along with the commitment provided in the SignedPayForMessage.

Action Items

• define API for checking inclusion
• compare commitments and subtree roots the SignedPayForData and the actual data in the square given the location and message size.
• write integration tests for subtree root code

References

depends on #49