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 97.90%. Comparing base (0b2c521) to head (8ee02d6).
Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #313      +/-   ##
============================================
- Coverage     97.92%   97.90%   -0.03%     
+ Complexity      212      210       -2     
============================================
  Files            22       22              
  Lines           724      716       -8     
============================================
- Hits            709      701       -8     
  Misses           15       15              

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