add returndata to resp

[ucwong]

No description provided.

[codecov]

Codecov Report

Merging #1630 (cffe011) into master (f2d5125) will increase coverage by 0.04%.
The diff coverage is 56.26%.

❗ Current head cffe011 differs from pull request most recent head 622c95f. Consider uploading reports for the commit 622c95f to get more accurate results

@@            Coverage Diff             @@
##           master    #1630      +/-   ##
==========================================
+ Coverage   52.50%   52.54%   +0.04%     
==========================================
  Files         480      480              
  Lines       59954    60061     +107     
==========================================
+ Hits        31481    31562      +81     
- Misses      26086    26115      +29     
+ Partials     2387     2384       -3     

Impacted Files	Coverage Δ
core/rawdb/freezer.go	45.71% <ø> (ø)
core/state/journal.go	75.51% <0.00%> (ø)
core/state/snapshot/account.go	0.00% <0.00%> (ø)
core/state/snapshot/generate.go	0.00% <0.00%> (ø)
core/types/block.go	23.07% <ø> (ø)
core/types/state_account.go	0.00% <0.00%> (ø)
core/vm/gas_table.go	11.88% <ø> (+0.24%)	⬆️
core/vm/memory_table.go	0.00% <0.00%> (ø)
core/vm/opcodes.go	18.18% <ø> (ø)
p2p/discover/v5wire/encoding.go	77.18% <ø> (ø)
... and 18 more

... and 13 files with indirect coverage changes