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 99.88%. Comparing base (a46aa0a) to head (83e5321).
Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #393      +/-   ##
============================================
- Coverage     99.88%   99.88%   -0.01%     
+ Complexity      276      274       -2     
============================================
  Files            33       33              
  Lines           854      844      -10     
============================================
- Hits            853      843      -10     
  Misses            1        1              

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