error[E0277]: the trait bound `parity_scale_codec::Compact<Balance>: MaxEncodedLen` is not satisfied
   --> substrate/primitives/staking/src/lib.rs:451:2
    |
451 |     MaxEncodedLen,
    |     ^^^^^^^^^^^^^ the trait `MaxEncodedLen` is not implemented for `parity_scale_codec::Compact<Balance>`