Refactoring

[Tigrov]

according to changes in main db package

• Refactofing db#940

Q	A
Is bugfix?	❌
New feature?	❌
Breaks BC?	❌
Fixed issues

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.48%. Comparing base (d7057c9) to head (2dbfe7b).
Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #345      +/-   ##
============================================
- Coverage     98.49%   98.48%   -0.02%     
+ Complexity      334      332       -2     
============================================
  Files            21       21              
  Lines          1065     1057       -8     
============================================
- Hits           1049     1041       -8     
  Misses           16       16              

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