extend block payload with new fields

[illia-malachyn]

Closes: #767

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 81.59509% with 30 lines in your changes missing coverage. Please review.

Project coverage is 57.89%. Comparing base (9f84549) to head (6b92f6a).
Report is 9 commits behind head on master.

Files with missing lines	Patch %	Lines
access/grpc/convert/convert.go	74.78%	21 Missing and 9 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #789      +/-   ##
==========================================
+ Coverage   57.04%   57.89%   +0.85%     
==========================================
  Files          35       35              
  Lines        7391     7541     +150     
==========================================
+ Hits         4216     4366     +150     
+ Misses       2673     2664       -9     
- Partials      502      511       +9     

Flag	Coverage Δ
unittests	57.89% <81.59%> (+0.85%)	⬆️

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