Emulator Feature: Report gas used

[avcdsld]

Closes: FLIP Fest issue 12 onflow/flip-fest#12

Description

There should be a way to see transaction gas (computation) usage.

With this change, the output result of the transaction execution will look like this

BEFORE

AFTER

Other

Since there was no specific test code for the standard output of "txID=xxxxxx" that is currently displayed, I decided that there was no need to add any specific test code for this change as well.

I checked to see if any changes were needed in this document, but it looks like no changes are needed.
https://docs.onflow.org/flow-cli/start-emulator/

---

For contributor use:

• Targeted PR against master branch
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work
• Code follows the standards mentioned here
• Updated relevant documentation
• Re-reviewed Files changed in the Github PR explorer
• Added appropriate labels

[sideninja]

Thank you for adding this, it looks good, however, it does highlight the lack of tests for convert/vm.go and types/result.go so if you could please add those it would be great.

[sideninja]

Missing tests needs to be implemented

[avcdsld]

Thanks for checking the code.
I've added tests for convert/vm.go and types/result.go. I hope you can check it.

[sideninja]

LGTM 🚀

[janezpodhostnik]

Looks great, just added some minor comments about naming.

[avcdsld]

Looks great, just added some minor comments about naming.

I see, I also think that if it is more appropriate to use that term than Gas, it should be modified.
Thanks for the confirmation and the suggestion!