-impl<'a, A: KVStorePersister, Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref, S: WriteableScore<'a>> Persister<'a, Signer, M, T, K, F, L, S> for A
- where M::Target: 'static + chain::Watch<Signer>,
+impl<'a, A: KVStorePersister, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref, S: WriteableScore<'a>> Persister<'a, M, T, K, F, L, S> for A
+ where M::Target: 'static + chain::Watch<<K::Target as KeysInterface>::Signer>,