Create an empty CardanoDbBeacon to be used as a placeholder

Author: sfauvel

CHANGELOG.md

@@ -25,7 +25,7 @@ As a minor extension, we have adopted a slightly different versioning convention
 
 - Add prettier configuration to standardize the code formatting in the repository.
 
-- Field `beacon` become optional in `CertificatePendingMessage` response of `/certificate-pending` route.
+- Field `beacon` becomes optional in `CertificatePendingMessage` response of `/certificate-pending` route.
 
 - **UNSTABLE** Cardano transactions certification:
 

mithril-aggregator/src/http_server/routes/certificate_routes.rs

@@ -122,7 +122,6 @@ mod tests {
     use anyhow::anyhow;
     use mithril_common::{
         entities::CertificatePending,
-        messages::CertificatePendingMessage,
         test_utils::{apispec::APISpec, fake_data},
     };
     use mithril_persistence::store::adapter::DumbStoreAdapter;

mithril-aggregator/src/message_adapters/to_certificate_pending_message.rs

@@ -10,9 +10,10 @@ pub struct ToCertificatePendingMessageAdapter;
 impl ToCertificatePendingMessageAdapter {
     /// Method to trigger the conversion
     pub fn adapt(certificate_pending: CertificatePending) -> CertificatePendingMessage {
+        #[allow(deprecated)]
         let beacon = match &certificate_pending.signed_entity_type {
             SignedEntityType::CardanoImmutableFilesFull(beacon) => beacon.clone(),
-            _ => CardanoDbBeacon::new("", 0, 0),
+            _ => CardanoDbBeacon::empty(),
         };
 
         #[allow(deprecated)]
@@ -68,7 +69,7 @@ mod tests {
     #[test]
     fn adapt_on_cardano_immutable_files_full_signed_entity_type_ok() {
         let mut certificate_pending = fake_data::certificate_pending();
-        let beacon = CardanoDbBeacon::new("network", 15, 756);
+        let beacon = fake_data::beacon();
         certificate_pending.signed_entity_type =
             SignedEntityType::CardanoImmutableFilesFull(beacon.clone());
 

mithril-common/src/entities/cardano_db_beacon.rs

@@ -61,6 +61,12 @@ impl CardanoDbBeacon {
         }
     }
 
+    /// Value used as a placeholder where a beacon is necessary
+    #[deprecated]
+    pub fn empty() -> Self {
+        Self::new("", 0, 0)
+    }
+
     /// Computes the hash of a CardanoDbBeacon
     pub fn compute_hash(&self) -> String {
         let mut hasher = Sha256::new();