FeeRateInterface

```
public interface FeeRateInterface

                    
```
Represents fee rate.
This is an integer type representing fee rate in sat/kwu. It provides protection against mixing up the types as well as basic formatting features.

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`public class`	`FeeRateInterface.Companion`

Method Summary

Modifier and Type	Method	Description
`abstract Amount`	`feeVb(ULong vb)`	Calculates fee in satoshis by multiplying this fee rate by weight, in virtual bytes, returning `None` if overflow occurred.
`abstract Amount`	`feeWu(ULong wu)`	Calculates fee by multiplying this fee rate by weight, in weight units, returning `None` if overflow occurred.
`abstract ULong`	`toSatPerKwu()`	Returns raw fee rate.
`abstract ULong`	`toSatPerVbCeil()`	Converts to sat/vB rounding up.
`abstract ULong`	`toSatPerVbFloor()`	Converts to sat/vB rounding down.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - feeVb
```
 abstract Amount feeVb(ULong vb)
```
    Calculates fee in satoshis by multiplying this fee rate by weight, in virtual bytes, returning None if overflow occurred.
    This is equivalent to converting vb to weight using Weight::from_vb and then calling Self::fee_wu(weight).
  - feeWu
```
 abstract Amount feeWu(ULong wu)
```
    Calculates fee by multiplying this fee rate by weight, in weight units, returning None if overflow occurred.
    This is equivalent to Self::checked_mul_by_weight().
  - toSatPerKwu
```
 abstract ULong toSatPerKwu()
```
    Returns raw fee rate.
  - toSatPerVbCeil
```
 abstract ULong toSatPerVbCeil()
```
    Converts to sat/vB rounding up.
  - toSatPerVbFloor
```
 abstract ULong toSatPerVbFloor()
```
    Converts to sat/vB rounding down.