ExecutionResult & gas refund

[ucwong]

No description provided.

[codecov]

Codecov Report

Merging #1830 (e0924c5) into master (9188a02) will decrease coverage by 0.04%.
Report is 398 commits behind head on master.
The diff coverage is 41.66%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1830      +/-   ##
==========================================
- Coverage   52.74%   52.71%   -0.04%     
==========================================
  Files         485      485              
  Lines       60556    60576      +20     
==========================================
- Hits        31941    31933       -8     
- Misses      26169    26195      +26     
- Partials     2446     2448       +2     

Files	Coverage Δ
core/state_prefetcher.go	36.36% <0.00%> (ø)
ctxc/api.go	4.89% <0.00%> (ø)
ctxc/state_accessor.go	0.00% <0.00%> (ø)
core/state_processor.go	70.58% <62.50%> (ø)
core/state_transition.go	41.50% <40.54%> (+0.94%)	⬆️

... and 12 files with indirect coverage changes