Enable zero as sudo_set_num_root_claims param value.

Author: shamil-gadelshin

pallets/subtensor/src/macros/dispatches.rs

@@ -2367,7 +2367,7 @@ mod dispatches {
             Ok(())
         }
 
-        /// --- Sets root claim number (sudo extrinsic).
+        /// --- Sets root claim number (sudo extrinsic). Zero disables auto-claim.
         #[pallet::call_index(123)]
         #[pallet::weight((
             Weight::from_parts(4_000_000, 0).saturating_add(T::DbWeight::get().writes(1_u64)),
@@ -2378,7 +2378,7 @@ mod dispatches {
             ensure_root(origin)?;
 
             ensure!(
-                new_value > 0 && new_value <= MAX_NUM_ROOT_CLAIMS,
+                new_value <= MAX_NUM_ROOT_CLAIMS,
                 Error::<T>::InvalidNumRootClaim
             );
 

pallets/subtensor/src/tests/claim_root.rs

@@ -792,6 +792,11 @@ fn test_claim_root_block_hash_indices() {
         let k = 15u64;
         let n = 15000u64;
 
+        // 0
+        let indices =
+            SubtensorModule::block_hash_to_indices(H256(sp_core::keccak_256(b"zero")), 0, n);
+        assert!(indices.is_empty());
+
         // 1
         let hash = sp_core::keccak_256(b"some");
         let mut indices = SubtensorModule::block_hash_to_indices(H256(hash), k, n);
@@ -1008,11 +1013,6 @@ fn test_sudo_set_num_root_claims() {
             DispatchError::BadOrigin
         );
 
-        assert_noop!(
-            SubtensorModule::sudo_set_num_root_claims(RuntimeOrigin::root(), 0u64),
-            Error::<Test>::InvalidNumRootClaim
-        );
-
         assert_noop!(
             SubtensorModule::sudo_set_num_root_claims(
                 RuntimeOrigin::root(),