fixing lint issue, add test for 6% protocol fee, 4% operator

[jac18281828]

closes #243

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

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❗ Current head 315b0d7 differs from pull request most recent head 1b0f058

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #244   +/-   ##
=======================================
  Coverage        ?   89.49%           
=======================================
  Files           ?       41           
  Lines           ?     2542           
  Branches        ?      297           
=======================================
  Hits            ?     2275           
  Misses          ?      183           
  Partials        ?       84           

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