fixes for the inconsistency of the slow claps

Signed-off-by: Uncle Stinky <uncle.stinky@ghostchain.io>

Cargo.lock

@@ -3836,7 +3836,7 @@ dependencies = [
 
 [[package]]
 name = "ghost-slow-clap"
-version = "0.3.39"
+version = "0.3.42"
 dependencies = [
  "frame-benchmarking",
  "frame-support",

pallets/slow-clap/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ghost-slow-clap"
-version = "0.3.40"
+version = "0.3.43"
 description = "Applause protocol for the EVM bridge"
 license.workspace = true
 authors.workspace = true

pallets/slow-clap/src/lib.rs

@@ -72,7 +72,7 @@ const LOG_TARGET: &str = "runtime::ghost-slow-clap";
 const DB_PREFIX: &[u8] = b"slow_clap::";
 
 const FETCH_TIMEOUT_PERIOD: u64 = 3_000;
-const LOCK_BLOCK_EXPIRATION: u64 = 10;
+const LOCK_BLOCK_EXPIRATION: u64 = 20;
 
 pub type AuthIndex = u32;
 
@@ -378,7 +378,8 @@ pub mod pallet {
 
         fn validate_unsigned(_source: TransactionSource, call: &Self::Call) -> TransactionValidity {
             if let Call::slow_clap { clap, signature } = call {
-                let authorities = Authorities::<T>::get(&clap.session_index);
+                let (session_index, _) = Self::mended_session_index(&clap);
+                let authorities = Authorities::<T>::get(&session_index);
                 let authority = match authorities.get(clap.authority_index as usize) {
                     Some(authority) => authority,
                     None => return InvalidTransaction::BadSigner.into(),
@@ -459,27 +460,49 @@ impl<T: Config> Pallet<T> {
         hex_str
     }
 
-    fn try_slow_clap(clap: &Clap<T::AccountId, NetworkIdOf<T>, BalanceOf<T>>) -> DispatchResult {
-        let authorities = Authorities::<T>::get(&clap.session_index);
-        ensure!(
-            authorities.get(clap.authority_index as usize).is_some(),
-            Error::<T>::NotAnAuthority
+    fn mended_session_index(
+        clap: &Clap<T::AccountId, NetworkIdOf<T>, BalanceOf<T>>,
+    ) -> (SessionIndex, H256) {
+        let prev_session_index = clap.session_index.saturating_sub(1);
+        let clap_unique_hash =
+            Self::generate_unique_hash(&clap.receiver, &clap.amount, &clap.network_id);
+
+        let received_claps_key = (
+            prev_session_index,
+            &clap.transaction_hash,
+            &clap_unique_hash,
         );
+
+        let session_index = ReceivedClaps::<T>::get(&received_claps_key)
+            .is_empty()
+            .then(|| clap.session_index)
+            .unwrap_or(prev_session_index);
+
+        (session_index, clap_unique_hash)
+    }
+
+    fn try_slow_clap(clap: &Clap<T::AccountId, NetworkIdOf<T>, BalanceOf<T>>) -> DispatchResult {
+        let (session_index, clap_unique_hash) = Self::mended_session_index(&clap);
+        let mut claps_in_session = ClapsInSession::<T>::get(&session_index);
+
         ensure!(
-            ClapsInSession::<T>::get(&clap.session_index)
+            claps_in_session
                 .get(&clap.authority_index)
                 .map(|info| !info.disabled)
                 .unwrap_or(true),
             Error::<T>::CurrentValidatorIsDisabled
         );
 
-        let clap_unique_hash =
-            Self::generate_unique_hash(&clap.receiver, &clap.amount, &clap.network_id);
-        let received_claps_key = (
-            clap.session_index,
-            &clap.transaction_hash,
-            &clap_unique_hash,
-        );
+        let disabled_authorites = claps_in_session
+            .values()
+            .filter(|info| info.disabled)
+            .count();
+
+        let active_authorities = Authorities::<T>::get(&session_index)
+            .len()
+            .saturating_sub(disabled_authorites);
+
+        let received_claps_key = (session_index, &clap.transaction_hash, &clap_unique_hash);
 
         let number_of_received_claps =
             ReceivedClaps::<T>::try_mutate(&received_claps_key, |tree_of_claps| {
@@ -498,15 +521,15 @@ impl<T: Config> Pallet<T> {
                 }
             })?;
 
-        ClapsInSession::<T>::mutate(&clap.session_index, |claps_details| {
-            (*claps_details)
+        claps_in_session
             .entry(clap.authority_index)
-                .and_modify(|individual| (*individual).claps.saturating_inc())
+            .and_modify(|individual| individual.claps.saturating_inc())
             .or_insert(SessionAuthorityInfo {
                 claps: 1u32,
                 disabled: false,
             });
-        });
+
+        ClapsInSession::<T>::insert(&session_index, claps_in_session);
 
         Self::deposit_event(Event::<T>::Clapped {
             authority_id: clap.authority_index,
@@ -517,7 +540,7 @@ impl<T: Config> Pallet<T> {
         });
 
         let enough_authorities =
-            Perbill::from_rational(number_of_received_claps as u32, authorities.len() as u32)
+            Perbill::from_rational(number_of_received_claps as u32, active_authorities as u32)
                 > Perbill::from_percent(T::ApplauseThreshold::get());
 
         if enough_authorities {
@@ -574,32 +597,55 @@ impl<T: Config> Pallet<T> {
 
     fn applause_if_posible(
         network_id: NetworkIdOf<T>,
-        session_index: SessionIndex,
+        prev_session_index: SessionIndex,
         transaction_hash: H256,
         receiver: T::AccountId,
         amount: BalanceOf<T>,
     ) -> DispatchResult {
+        let curr_session_index = prev_session_index.saturating_add(1);
         let clap_unique_hash = Self::generate_unique_hash(&receiver, &amount, &network_id);
-        let received_claps_key = (session_index, &transaction_hash, &clap_unique_hash);
+        let prev_received_claps_key = (prev_session_index, &transaction_hash, &clap_unique_hash);
+        let curr_received_claps_key = (curr_session_index, &transaction_hash, &clap_unique_hash);
+
+        let prev_authorities = Authorities::<T>::get(&prev_session_index);
+        let curr_authorities = Authorities::<T>::get(&curr_session_index);
+
+        let prev_received_claps = ReceivedClaps::<T>::get(&prev_received_claps_key).into_inner();
+        let curr_received_claps = ReceivedClaps::<T>::get(&curr_received_claps_key).into_inner();
+
+        let summary_authority_claps_length = curr_received_claps
+            .difference(&prev_received_claps)
+            .filter_map(|&index| {
+                curr_authorities
+                    .get(index as usize)
+                    .map(|curr_authority| {
+                        prev_authorities
+                            .iter()
+                            .position(|prev_authority| curr_authority == prev_authority)
+                    })
+                    .flatten()
+            })
+            .count()
+            .saturating_add(curr_received_claps.len());
 
         let clap = Clap {
             authority_index: Default::default(),
             block_number: Default::default(),
-            removed: false,
-            session_index,
+            removed: Default::default(),
+            session_index: Default::default(),
+            transaction_hash: Default::default(),
             network_id,
             receiver,
             amount,
-            transaction_hash,
         };
 
         let enough_authorities = Perbill::from_rational(
-            ReceivedClaps::<T>::get(&received_claps_key).len() as u32,
-            Authorities::<T>::get(session_index).len() as u32,
+            summary_authority_claps_length as u32,
+            Authorities::<T>::get(prev_session_index).len() as u32,
         ) > Perbill::from_percent(T::ApplauseThreshold::get());
 
         ensure!(enough_authorities, Error::<T>::NotEnoughClaps);
-        Self::try_applause(&clap, &received_claps_key)?;
+        Self::try_applause(&clap, &prev_received_claps_key)?;
 
         Ok(())
     }
@@ -766,14 +812,17 @@ impl<T: Config> Pallet<T> {
                                             Some(_) if from_block.le(&to_block) => {
                                                 let adjusted_to_block = estimated_block
                                                     .checked_sub(from_block)
-                                                    .map(|current_distance| current_distance
+                                                    .map(|current_distance| {
+                                                        current_distance
                                                             .le(&max_block_distance)
                                                             .then(|| estimated_block)
-                                                    )
+                                                    })
                                                     .flatten()
-                                                    .unwrap_or(from_block
+                                                    .unwrap_or(
+                                                        from_block
                                                             .saturating_add(max_block_distance)
-                                                        .min(estimated_block));
+                                                            .min(estimated_block),
+                                                    );
                                                 (from_block, adjusted_to_block)
                                             }
                                             _ => (to_block, to_block),
@@ -1087,8 +1136,8 @@ impl<T: Config> OneSessionHandler<T::AccountId> for Pallet<T> {
     }
 
     fn on_before_session_ending() {
-        let session_index = T::ValidatorSet::session_index();
         let validators = T::ValidatorSet::validators();
+        let session_index = T::ValidatorSet::session_index().saturating_sub(1);
         let authorities_len = Authorities::<T>::get(&session_index).len();
         let claps_in_session = ClapsInSession::<T>::get(&session_index);
 
@@ -1097,12 +1146,14 @@ impl<T: Config> OneSessionHandler<T::AccountId> for Pallet<T> {
         let offenders = validators
             .into_iter()
             .enumerate()
-            .filter(|(index, _)| !Self::is_good_actor(*index, median_claps, &claps_in_session))
-            .filter_map(|(_, id)| {
+            .filter_map(|(index, id)| {
+                (!Self::is_good_actor(index, median_claps, &claps_in_session)).then(|| {
                     <T::ValidatorSet as ValidatorSetWithIdentification<T::AccountId>>::IdentificationOf::convert(
                         id.clone(),
                     ).map(|full_id| (id, full_id))
                 })
+                .flatten()
+            })
             .collect::<Vec<IdentificationTuple<T>>>();
 
         if offenders.is_empty() {

pallets/slow-clap/src/tests.rs

@@ -991,7 +991,6 @@ fn should_self_applause_if_enough_received_claps() {
 
         assert_ok!(do_clap_from(session_index, network_id, 0, false));
         assert_ok!(do_clap_from(session_index, network_id, 1, false));
-        assert_ok!(do_clap_from(session_index, network_id, 2, false));
 
         assert_eq!(
             pallet::ApplausesForTransaction::<Runtime>::get(&storage_key),
@@ -999,14 +998,17 @@ fn should_self_applause_if_enough_received_claps() {
         );
         assert_eq!(Balances::balance(&receiver), 0);
 
-        assert_ok!(SlowClap::self_applause(
+        assert_err!(
+            SlowClap::self_applause(
                 RuntimeOrigin::signed(receiver),
                 network_id,
                 session_index,
                 transaction_hash,
                 receiver,
                 amount,
-        ));
+            ),
+            Error::<Runtime>::NotEnoughClaps
+        );
         assert_eq!(
             pallet::ApplausesForTransaction::<Runtime>::get(&storage_key),
             false
@@ -1015,6 +1017,26 @@ fn should_self_applause_if_enough_received_claps() {
 
         Networks::on_finalize(System::block_number());
 
+        advance_session();
+        let next_session_index = Session::session_index();
+        let next_storage_key = (
+            next_session_index,
+            transaction_hash,
+            unique_transaction_hash,
+        );
+        assert_ok!(do_clap_from(next_session_index, network_id, 2, false));
+
+        assert_err!(
+            SlowClap::self_applause(
+                RuntimeOrigin::signed(receiver),
+                network_id,
+                next_session_index,
+                transaction_hash,
+                receiver,
+                amount,
+            ),
+            Error::<Runtime>::NotEnoughClaps
+        );
         assert_ok!(SlowClap::self_applause(
             RuntimeOrigin::signed(receiver),
             network_id,
@@ -1027,6 +1049,10 @@ fn should_self_applause_if_enough_received_claps() {
             pallet::ApplausesForTransaction::<Runtime>::get(&storage_key),
             true
         );
+        assert_eq!(
+            pallet::ApplausesForTransaction::<Runtime>::get(&next_storage_key),
+            false
+        );
         assert_eq!(Balances::balance(&receiver), amount);
     });
 }