Merge pull request #2455 from subspace/fix-free-space-calculation

Fix free space calculation to account for min replication factor properly

Author: nazar-pc

crates/pallet-transaction-fees/src/lib.rs

@@ -257,10 +257,9 @@ where
     pub fn calculate_transaction_byte_fee() -> BalanceOf<T> {
         let credit_supply = T::CreditSupply::get();
 
-        match T::TotalSpacePledged::get().checked_sub(
-            T::BlockchainHistorySize::get()
-                .saturating_mul(u128::from(T::MinReplicationFactor::get())),
-        ) {
+        match (T::TotalSpacePledged::get() / u128::from(T::MinReplicationFactor::get()))
+            .checked_sub(T::BlockchainHistorySize::get())
+        {
             Some(free_space) if free_space > 0 => {
                 credit_supply / BalanceOf::<T>::saturated_from(free_space)
             }