Claim nahmii revenue within core

[katat]

Description

The wallets within core should be able to claim nahmii fees revenue.

The support for this should be done using nahmii-sdk's concept of fees claimant. The most needed feature is likely to be ability to obtain claimable amounts and claim fees by accrual indices. But also the alternative of obtaining and claiming by block numbers should be supported. Finally, users should be able to obtain withdrawable amounts and withdraw their accrued fees.

Definition of done

• It is possible for a user to obtain claimable amount and claim fees at least by accrual indices
• It is possible for a user to obtain withdrawable amount and withdraw fees
• Unit tests have been updated

Details & Questions

Depends on