refactor(aggregator): update 'ChainObserver' implementation

Author: jpraynaud

mithril-aggregator/src/services/signer_registration/verifier.rs

@@ -45,7 +45,7 @@ impl SignerRegistrationVerifier for MithrilSignerRegistrationVerifier {
         let kes_period = match &signer.operational_certificate {
             Some(operational_certificate) => Some(
                 self.chain_observer
-                    .get_current_kes_period(operational_certificate)
+                    .get_current_kes_period()
                     .await?
                     .unwrap_or_default()
                     - operational_certificate.start_kes_period as KesPeriod,

mithril-aggregator/src/test/double/mocks.rs

@@ -3,7 +3,7 @@ use async_trait::async_trait;
 use mithril_cardano_node_chain::chain_observer::{ChainObserver, ChainObserverError};
 use mithril_cardano_node_chain::entities::{ChainAddress, TxDatum};
 use mithril_common::certificate_chain::CertificateVerifier;
-use mithril_common::crypto_helper::{KesPeriod, OpCert, ProtocolGenesisVerificationKey};
+use mithril_common::crypto_helper::{KesPeriod, ProtocolGenesisVerificationKey};
 use mithril_common::entities::{Certificate, ChainPoint, Epoch, StakeDistribution};
 use mithril_persistence::store::StakeStorer;
 
@@ -63,7 +63,6 @@ mock! {
 
         async fn get_current_kes_period(
             &self,
-            opcert: &OpCert,
         ) -> Result<Option<KesPeriod>, ChainObserverError>;
     }
 }