bridge slashing issue fix

Signed-off-by: Uncle Stretch <uncle.stretch@ghostchain.io>

Cargo.lock

@@ -3832,7 +3832,7 @@ dependencies = [
 
 [[package]]
 name = "ghost-slow-clap"
-version = "0.3.14"
+version = "0.3.15"
 dependencies = [
  "frame-benchmarking",
  "frame-support",

pallets/slow-clap/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ghost-slow-clap"
-version = "0.3.14"
+version = "0.3.15"
 description = "Applause protocol for the EVM bridge"
 license.workspace = true
 authors.workspace = true

pallets/slow-clap/src/lib.rs

@@ -1162,16 +1162,22 @@ impl<T: Config> Pallet<T> {
         session_index: SessionIndex,
         average_claps: u32,
     ) -> bool {
+        if average_claps == 0 {
+            return true;
+        }
+
         let claps_in_session = AuthorityInfoInSession::<T>::get(session_index);
         match claps_in_session.get(authority_index) {
             Some(clap_in_session) => {
                 let number_of_claps = &clap_in_session.actions;
                 let authority_deviation = if *number_of_claps < average_claps {
-                    Perbill::from_rational(*number_of_claps, average_claps)
-                } else { Perbill::from_rational(average_claps, *number_of_claps) };
+                    Perbill::from_rational(average_claps - *number_of_claps, average_claps)
+                } else { 
+                    Perbill::from_rational(*number_of_claps - average_claps, average_claps)
+                };
                 authority_deviation < Perbill::from_percent(T::OffenceThreshold::get())
             },
-            _ => false,
+            None => false,
         }
     }
 

pallets/slow-clap/src/tests.rs

@@ -35,7 +35,6 @@ fn prepare_companion(amount: u64) -> Companion<NetworkIdOf<Runtime>, BalanceOf<R
     Companion {
         network_id: 1,
         receiver: H160::from_low_u64_ne(1337),
-        fee: H256::from_low_u64_ne(40_000),
         amount: amount,
     }
 }