Get system transaction get system trtansaction result endpoints

[AndriiDiachuk]

Closes: #750

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 68.00000% with 8 lines in your changes missing coverage. Please review.

Project coverage is 52.36%. Comparing base (d91be5b) to head (f2c5da3).
Report is 167 commits behind head on master.

Files with missing lines	Patch %	Lines
access/grpc/client.go	0.00%	4 Missing ⚠️
access/grpc/grpc.go	80.95%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #756      +/-   ##
==========================================
- Coverage   61.97%   52.36%   -9.61%     
==========================================
  Files          27       35       +8     
  Lines        3734     5276    +1542     
==========================================
+ Hits         2314     2763     +449     
- Misses       1231     2171     +940     
- Partials      189      342     +153     

Flag	Coverage Δ
unittests	52.36% <68.00%> (-9.61%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.