phase 0 : prepare decentralization parameters

CHANGELOG.md

@@ -7,6 +7,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 As a minor extension, we have adopted a slightly different versioning convention for the Mithril distributions (<https://mithril.network/doc/adr/3#decision>)
 
+## Mithril Distribution [XXXX] - UNRELEASED
+
+- **BREAKING** changes in aggregator OpenAPI: removed the `next_cardano_transactions_signing_config` in `/epoch-settings` route.
+
+- Crates versions:
+
+| Crate | Version |
+| ----- | ------- |
+| N/A   | `-`     |
+
 ## Mithril Distribution [2537] - 2025-09-17
 
 - Client library, CI and WASM:

mithril-aggregator/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "mithril-aggregator"
-version = "0.7.84"
+version = "0.7.85"
 description = "A Mithril Aggregator server"
 authors = { workspace = true }
 edition = { workspace = true }

mithril-aggregator/src/entities/leader_aggregator_epoch_settings.rs

@@ -19,7 +19,4 @@ pub struct LeaderAggregatorEpochSettings {
 
     /// Cardano transactions signing configuration for the current epoch
     pub cardano_transactions_signing_config: Option<CardanoTransactionsSigningConfig>,
-
-    /// Cardano transactions signing configuration for the next epoch
-    pub next_cardano_transactions_signing_config: Option<CardanoTransactionsSigningConfig>,
 }

mithril-aggregator/src/message_adapters/from_epoch_settings.rs

@@ -22,8 +22,6 @@ impl TryFromMessageAdapter<EpochSettingsMessage, LeaderAggregatorEpochSettings>
             next_signers: SignerMessagePart::try_into_signers(message.next_signers)
                 .with_context(|| "'FromMessageAdapter' can not convert the next signers")?,
             cardano_transactions_signing_config: message.cardano_transactions_signing_config,
-            next_cardano_transactions_signing_config: message
-                .next_cardano_transactions_signing_config,
         };
 
         Ok(epoch_settings)

mithril-aggregator/src/services/epoch_service.rs

@@ -80,11 +80,6 @@ pub trait EpochService: Sync + Send {
         &self,
     ) -> StdResult<&CardanoTransactionsSigningConfig>;
 
-    /// Get next cardano transactions signing configuration used in next epoch
-    fn next_cardano_transactions_signing_config(
-        &self,
-    ) -> StdResult<&CardanoTransactionsSigningConfig>;
-
     /// Get aggregate verification key for current epoch
     fn current_aggregate_verification_key(&self) -> StdResult<&ProtocolAggregateVerificationKey>;
 
@@ -470,15 +465,6 @@ impl EpochService for MithrilEpochService {
             .cardano_transactions_signing_config)
     }
 
-    fn next_cardano_transactions_signing_config(
-        &self,
-    ) -> StdResult<&CardanoTransactionsSigningConfig> {
-        Ok(&self
-            .unwrap_data()?
-            .next_epoch_settings
-            .cardano_transactions_signing_config)
-    }
-
     fn current_aggregate_verification_key(&self) -> StdResult<&ProtocolAggregateVerificationKey> {
         Ok(&self.unwrap_computed_data()?.aggregate_verification_key)
     }
@@ -772,15 +758,6 @@ impl EpochService for FakeEpochService {
             .cardano_transactions_signing_config)
     }
 
-    fn next_cardano_transactions_signing_config(
-        &self,
-    ) -> StdResult<&CardanoTransactionsSigningConfig> {
-        Ok(&self
-            .unwrap_data()?
-            .next_epoch_settings
-            .cardano_transactions_signing_config)
-    }
-
     fn current_aggregate_verification_key(&self) -> StdResult<&ProtocolAggregateVerificationKey> {
         Ok(&self.unwrap_computed_data()?.aggregate_verification_key)
     }
@@ -873,7 +850,6 @@ mod tests {
         protocol_parameters: ProtocolParameters,
         next_protocol_parameters: ProtocolParameters,
         cardano_signing_config: CardanoTransactionsSigningConfig,
-        next_cardano_signing_config: CardanoTransactionsSigningConfig,
         signer_registration_protocol_parameters: ProtocolParameters,
         current_signers_with_stake: BTreeSet<SignerWithStake>,
         next_signers_with_stake: BTreeSet<SignerWithStake>,
@@ -904,9 +880,6 @@ mod tests {
                 cardano_signing_config: service
                     .current_cardano_transactions_signing_config()?
                     .clone(),
-                next_cardano_signing_config: service
-                    .next_cardano_transactions_signing_config()?
-                    .clone(),
                 current_signers_with_stake: service
                     .current_signers_with_stake()?
                     .clone()
@@ -1103,7 +1076,6 @@ mod tests {
                 next_protocol_parameters: next_epoch_fixture.protocol_parameters(),
                 signer_registration_protocol_parameters,
                 cardano_signing_config: CardanoTransactionsSigningConfig::dummy(),
-                next_cardano_signing_config: CardanoTransactionsSigningConfig::dummy(),
                 current_signers_with_stake: current_epoch_fixture
                     .signers_with_stake()
                     .into_iter()
@@ -1336,10 +1308,6 @@ mod tests {
                 "current_cardano_transactions_signing_config",
                 service.current_cardano_transactions_signing_config().err(),
             ),
-            (
-                "next_cardano_transactions_signing_config",
-                service.next_cardano_transactions_signing_config().err(),
-            ),
             (
                 "current_signers_with_stake",
                 service.current_signers_with_stake().err(),
@@ -1394,7 +1362,6 @@ mod tests {
         assert!(service.next_protocol_parameters().is_ok());
         assert!(service.signer_registration_protocol_parameters().is_ok());
         assert!(service.current_cardano_transactions_signing_config().is_ok());
-        assert!(service.next_cardano_transactions_signing_config().is_ok());
         assert!(service.current_signers_with_stake().is_ok());
         assert!(service.next_signers_with_stake().is_ok());
         assert!(service.current_signers().is_ok());

mithril-aggregator/src/services/message.rs

@@ -165,18 +165,13 @@ impl MessageService for MithrilMessageService {
             .map(|_| epoch_service.current_cardano_transactions_signing_config())
             .transpose()?
             .cloned();
-        let next_cardano_transactions_signing_config = cardano_transactions_discriminant
-            .map(|_| epoch_service.next_cardano_transactions_signing_config())
-            .transpose()?
-            .cloned();
 
         let epoch_settings_message = EpochSettingsMessage {
             epoch,
             signer_registration_protocol_parameters,
             current_signers: SignerMessagePart::from_signers(current_signers.to_vec()),
             next_signers: SignerMessagePart::from_signers(next_signers.to_vec()),
             cardano_transactions_signing_config,
-            next_cardano_transactions_signing_config,
         };
 
         Ok(epoch_settings_message)
@@ -472,13 +467,6 @@ mod tests {
                     step: BlockNumber(15)
                 })
             );
-            assert_eq!(
-                message.next_cardano_transactions_signing_config,
-                Some(CardanoTransactionsSigningConfig {
-                    security_parameter: BlockNumber(0),
-                    step: BlockNumber(15)
-                })
-            );
         }
 
         #[tokio::test]
@@ -498,7 +486,6 @@ mod tests {
                 .unwrap();
 
             assert!(message.cardano_transactions_signing_config.is_some());
-            assert!(message.next_cardano_transactions_signing_config.is_some(),);
         }
 
         #[tokio::test]
@@ -516,7 +503,6 @@ mod tests {
                 .unwrap();
 
             assert_eq!(message.cardano_transactions_signing_config, None);
-            assert_eq!(message.next_cardano_transactions_signing_config, None);
         }
 
         #[tokio::test]
@@ -597,10 +583,6 @@ mod tests {
                 message.cardano_transactions_signing_config,
                 Some(current_epoch_settings.cardano_transactions_signing_config),
             );
-            assert_eq!(
-                message.next_cardano_transactions_signing_config,
-                Some(next_epoch_settings.cardano_transactions_signing_config),
-            );
         }
     }
 

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

@@ -81,8 +81,6 @@ mod entities {
             // Cardano transactions signing configuration
             let cardano_transactions_signing_config =
                 Some(CardanoTransactionsSigningConfig::dummy());
-            let next_cardano_transactions_signing_config =
-                Some(CardanoTransactionsSigningConfig::dummy());
 
             // Signer Epoch settings
             LeaderAggregatorEpochSettings {
@@ -91,7 +89,6 @@ mod entities {
                 current_signers,
                 next_signers,
                 cardano_transactions_signing_config,
-                next_cardano_transactions_signing_config,
             }
         }
     }

mithril-common/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "mithril-common"
-version = "0.6.17"
+version = "0.6.18"
 description = "Common types, interfaces, and utilities for Mithril nodes."
 authors = { workspace = true }
 edition = { workspace = true }

mithril-common/src/messages/epoch_settings.rs

@@ -21,10 +21,6 @@ pub struct EpochSettingsMessage {
     /// Cardano transactions signing configuration for the current epoch
     #[serde(skip_serializing_if = "Option::is_none")]
     pub cardano_transactions_signing_config: Option<CardanoTransactionsSigningConfig>,
-
-    /// Cardano transactions signing configuration for the next epoch
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub next_cardano_transactions_signing_config: Option<CardanoTransactionsSigningConfig>,
 }
 
 #[cfg(test)]
@@ -54,13 +50,57 @@ mod tests {
         "cardano_transactions_signing_config": {
             "security_parameter": 70,
             "step": 20
-        },
-        "next_cardano_transactions_signing_config": {
-            "security_parameter": 50,
-            "step": 10
         }
     }"#;
 
+    #[derive(Debug, Serialize, Deserialize, PartialEq)]
+    struct EpochSettingsMessageUntilV0_1_51 {
+        pub epoch: Epoch,
+
+        #[serde(rename = "signer_registration_protocol")]
+        pub signer_registration_protocol_parameters: ProtocolParameters,
+
+        pub current_signers: Vec<SignerMessagePart>,
+
+        pub next_signers: Vec<SignerMessagePart>,
+
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub cardano_transactions_signing_config: Option<CardanoTransactionsSigningConfig>,
+
+        #[serde(skip_serializing_if = "Option::is_none")]
+        pub next_cardano_transactions_signing_config: Option<CardanoTransactionsSigningConfig>,
+    }
+
+    fn golden_message_until_open_api_0_1_51() -> EpochSettingsMessageUntilV0_1_51 {
+        EpochSettingsMessageUntilV0_1_51 {
+            epoch: Epoch(10),
+            signer_registration_protocol_parameters: ProtocolParameters {
+                k: 500,
+                m: 10000,
+                phi_f: 0.65,
+            },
+            current_signers: vec![SignerMessagePart {
+                party_id: "123".to_string(),
+                verification_key: "key_123".to_string(),
+                verification_key_signature: Some("signature_123".to_string()),
+                operational_certificate: Some("certificate_123".to_string()),
+                kes_period: Some(12),
+            }],
+            next_signers: vec![SignerMessagePart {
+                party_id: "456".to_string(),
+                verification_key: "key_456".to_string(),
+                verification_key_signature: Some("signature_456".to_string()),
+                operational_certificate: Some("certificate_456".to_string()),
+                kes_period: Some(45),
+            }],
+            cardano_transactions_signing_config: Some(CardanoTransactionsSigningConfig {
+                security_parameter: BlockNumber(70),
+                step: BlockNumber(20),
+            }),
+            next_cardano_transactions_signing_config: None,
+        }
+    }
+
     fn golden_current_message() -> EpochSettingsMessage {
         EpochSettingsMessage {
             epoch: Epoch(10),
@@ -87,13 +127,17 @@ mod tests {
                 security_parameter: BlockNumber(70),
                 step: BlockNumber(20),
             }),
-            next_cardano_transactions_signing_config: Some(CardanoTransactionsSigningConfig {
-                security_parameter: BlockNumber(50),
-                step: BlockNumber(10),
-            }),
         }
     }
 
+    #[test]
+    fn test_current_json_deserialized_into_message_supported_until_open_api_0_1_51() {
+        let json = CURRENT_JSON;
+        let message: EpochSettingsMessageUntilV0_1_51 = serde_json::from_str(json).unwrap();
+
+        assert_eq!(golden_message_until_open_api_0_1_51(), message);
+    }
+
     #[test]
     fn test_current_json_deserialized_into_current_message() {
         let json = CURRENT_JSON;

mithril-common/src/test/double/dummies.rs

@@ -412,9 +412,6 @@ mod messages {
                 current_signers: [SignerMessagePart::dummy()].to_vec(),
                 next_signers: [SignerMessagePart::dummy()].to_vec(),
                 cardano_transactions_signing_config: Some(CardanoTransactionsSigningConfig::dummy()),
-                next_cardano_transactions_signing_config: Some(
-                    CardanoTransactionsSigningConfig::dummy(),
-                ),
             }
         }
     }

mithril-signer/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "mithril-signer"
-version = "0.2.268"
+version = "0.2.269"
 description = "A Mithril Signer"
 authors = { workspace = true }
 edition = { workspace = true }

mithril-signer/src/entities/signer_epoch_settings.rs

@@ -19,9 +19,6 @@ pub struct SignerEpochSettings {
 
     /// Cardano transactions signing configuration for the current epoch
     pub cardano_transactions_signing_config: Option<CardanoTransactionsSigningConfig>,
-
-    /// Cardano transactions signing configuration for the next epoch
-    pub next_cardano_transactions_signing_config: Option<CardanoTransactionsSigningConfig>,
 }
 
 #[cfg(test)]
@@ -43,8 +40,6 @@ impl mithril_common::test::double::Dummy for SignerEpochSettings {
 
         // Cardano transactions signing configuration
         let cardano_transactions_signing_config = Some(CardanoTransactionsSigningConfig::dummy());
-        let next_cardano_transactions_signing_config =
-            Some(CardanoTransactionsSigningConfig::dummy());
 
         // Signer Epoch settings
         SignerEpochSettings {
@@ -53,7 +48,6 @@ impl mithril_common::test::double::Dummy for SignerEpochSettings {
             current_signers,
             next_signers,
             cardano_transactions_signing_config,
-            next_cardano_transactions_signing_config,
         }
     }
 }