* wip

* add comments

* fix comment

* comments

* comments

* PR comment

* field orders

* Update frame/contracts/src/tests.rs

* Update frame/contracts/fixtures/call_runtime_and_call.wat

Co-authored-by: Sasha Gryaznov <[email protected]>

* Apply suggestions from code review

Co-authored-by: Sasha Gryaznov <[email protected]>

* Apply suggestions from code review

Co-authored-by: Sasha Gryaznov <[email protected]>

* Update frame/contracts/src/tests.rs

Co-authored-by: Sasha Gryaznov <[email protected]>

* Validate fees of failed call

* Update frame/contracts/src/tests.rs

* Update frame/contracts/src/tests.rs

* Update frame/contracts/src/tests.rs

* bubble up refund error

* rename fixture file

---------

Co-authored-by: Sasha Gryaznov <[email protected]>
Co-authored-by: parity-processbot <>