separate priority fee and transaction fee from fee calculation

[tao-stones]

Problem

To reward priority fee differently from transaction fee (SIMD-0096), priority fee should be separated from return of calculate_fee(...).

Summary of Changes

• change calculate_fee() return type from u64 to FeeDetails
• no other functional changes.

Fixes #

[codecov[bot]]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (51c0649) 81.6% compared to head (f84b315) 81.6%. Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #34757   +/-   ##
=======================================
  Coverage    81.6%    81.6%           
=======================================
  Files         830      830           
  Lines      224746   224757   +11     
=======================================
+ Hits       183515   183547   +32     
+ Misses      41231    41210   -21     

[t-nelson]

can this wait for 1.19? should be able to cut 1.18 in ~1wk if all goes well with mb 1.17 adoption, making this mergeable into master

[tao-stones]

can this wait for 1.19? should be able to cut 1.18 in ~1wk if all goes well with mb 1.17 adoption, making this mergeable into master

1.19 sounds good, need time to test anyway.