Expose gas_refunded in EVM

[ngotchac]

Hi,

For a private project, I would need to get access to the gas_refunded value computed during the finalization phase of a transaction's execution. This is useful, in conjunction with the gas_used to better estimate the required gas of a transaction.

I already have it implemented here, but it introduces some changes to this crate's API, which is why I didn't open a PR. I'm not sure what's the best path here...

[rakita]

If project is private, I would need you and your extended family to sign the pack of publicness ( just kidding).

API should be changed to return this value, would probably introduce a new struct as this would be the 6th output field.

[ngotchac]

Aha yeah sorry I don't really have a choice about its publicness :/
Yeah I was also thinking about returning a struct since the tuple is getting quite big. Should I make a PR then?

[rakita]

go for it

[rakita]

@ngotchac thank you for contributing!