[Debugger] Debug realms during transaction execution

[leohhhn]

Description

This is a proposal for an improvement on the GnoVM debugger. Currently the debugger is ran via gno run, meaning that it does not necessarily provide a way to debug functions during transaction calls.

I definitely see the benefit of being able to debug during a transaction; this way, you could set a breakpoint in a function, execute a transaction, and run through the program with the debugger.

This could also be a cool way to integrate the debugger with gnodev, making gnodev even more overpowered.

@mvertes, @gfanton, do you think something like this is feasible?

cc @gfant

[leohhhn]

After some internal discussions, a suggested flow could be the following:

• Write gno code
• Write function to debug
• Add // debug or similar in-code thing to tell the machine that it should be debugged at that point
• Run gnodev -debug, which will await a transaction, from anywhere, be it gnokey, or another wallet/interface
• Stop the machine at // debug
• Interact with debugger from within gnodev

Not sure if this is really feasible from the technical side; @gfanton & @mvertes can provide more details or other ways we could do this :)

[gfant]

I guess it could be better to add an end flag instead of the same, no? Like end-debug. Also this allows the idea of adding several blocks of debugging in the same run.