piotrmurach/coinpare

### Describe the change
What does this Pull Request do?

### Why are we doing this?
Any related context as to why is this is a desirable change.

### Benefits
How will the library improve?

### Drawbacks
Possible drawbacks applying this change.

### Requirements
Put an X between brackets on each line if you have done the item:
[] Tests written & passing locally?
[] Code style checked?
[] Rebased with `master` branch?
[] Documentation updated?