fix unset CurrentPoolIndex during first evaluation period

pallets/distance/src/lib.rs

@@ -81,10 +81,13 @@ pub use traits::*;
 pub use types::*;
 pub use weights::WeightInfo;
 
-use frame_support::traits::{
+use frame_support::{
+    traits::{
         fungible::{self, hold, Credit, Mutate, MutateHold},
         tokens::Precision,
         OnUnbalanced, StorageVersion,
+    },
+    DefaultNoBound,
 };
 use sp_distance::{InherentError, INHERENT_IDENTIFIER};
 use sp_inherents::{InherentData, InherentIdentifier};
@@ -288,6 +291,19 @@ pub mod pallet {
         TargetMustBeUnvalidated,
     }
 
+    #[pallet::genesis_config]
+    #[derive(DefaultNoBound)]
+    pub struct GenesisConfig<T: Config> {
+        pub _config: core::marker::PhantomData<T>,
+    }
+
+    #[pallet::genesis_build]
+    impl<T: Config> BuildGenesisConfig for GenesisConfig<T> {
+        fn build(&self) {
+            CurrentPoolIndex::<T>::put(0u32);
+        }
+    }
+
     #[pallet::hooks]
     impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {
         fn on_initialize(block: BlockNumberFor<T>) -> Weight