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 57.47%. Comparing base (2f7fa8b) to head (5a42ecd).
Report is 1 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   56.59%   57.47%   +0.88%     
==========================================
  Files          35       35              
  Lines        7305     7454     +149     
==========================================
+ Hits         4134     4284     +150     
+ Misses       2670     2660      -10     
- Partials      501      510       +9     

Flag	Coverage Δ
unittests	57.47% <81.59%> (+0.88%)	⬆️

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[peterargue]

@illia-malachyn looks good, please merge master, then we can merge