Coin Selection Split Fee Module

[KtorZ]

Issue Number

#92

Overview

• I have split logic related to fee calculation into its own module
• I have placed fee policies into a more specific namespace 'CoinSelection.Policy'

Comments

You suggested this initially @paweljakubas and I thought fee logic would be better off being part of the CoinSelection. Yet, the implementation is actually rather complex, and the test structure had become quite confusing and entangled. So I just renamed a few modules and extracted the bits related to the fee adjustment into its own module.

[paweljakubas]

very needed code reshuffling as coin selection/fee grown to a substantial level