TEAL assembly details

[barnjamin]

Problem

When debugging a TEAL program, given an error message from a Application Call, there is no straightforward way to map the PC returned in the error message to the line of TEAL.

Solution

We could append the PC to each line during disassembly by default or given an appropriate flag.

Alternatively, during assembly, we could output a JSON file with these details and any other details about the program. Other details might include program cost or some details about Template Variables or hash of the contract.

Dependencies

Probably the assembler and maybe an ARC or spec addition?

[barnjamin]

This may be a reasonable place to put the ABI method descriptions as well

[barnjamin]

It looks like the assembler already tracks the pc=>source line here https://github.com/algorand/go-algorand/blob/master/data/transactions/logic/assembler.go#L246