Ensure all data of a note is available for public notes.

[hackaugusto]

What should be done?

Ensure every value of a note is fully available when its type is Public. This includes the complete MASM source code, forbidden phantom calls. The note inputs, and the serial_num.

How should it be done?

When is this task done?

When the protocol enforces the availability of the public note data, and verifies the data is valid.

Additional context

#572 (comment)

[bobbinth]

We should tackle this after we transition to using MAST as the serialized format for note/account code.