Hotfix/reapply before testnet merge

pallets/subtensor/src/lib.rs

@@ -1988,7 +1988,7 @@ where
                     Pallet::<T>::get_registrations_this_interval(*netuid);
                 let max_registrations_per_interval =
                     Pallet::<T>::get_target_registrations_per_interval(*netuid);
-                if registrations_this_interval >= max_registrations_per_interval {
+                if registrations_this_interval >= (max_registrations_per_interval * 3) {
                     // If the registration limit for the interval is exceeded, reject the transaction
                     return InvalidTransaction::ExhaustsResources.into();
                 }

pallets/subtensor/src/staking.rs

@@ -436,26 +436,18 @@ impl<T: Config> Pallet<T> {
             Error::<T>::UnstakeRateLimitExceeded
         );
 
-        // If this is a nomination stake, check if total stake after removing will be above
-        // the minimum required stake.
-
-        // If coldkey is not owner of the hotkey, it's a nomination stake.
-        if !Self::coldkey_owns_hotkey(&coldkey, &hotkey) {
-            let total_stake_after_remove =
-                Stake::<T>::get(&hotkey, &coldkey).saturating_sub(stake_to_be_removed);
-
-            ensure!(
-                total_stake_after_remove >= NominatorMinRequiredStake::<T>::get(),
-                Error::<T>::NomStakeBelowMinimumThreshold
-            );
-        }
-
         // We remove the balance from the hotkey.
         Self::decrease_stake_on_coldkey_hotkey_account(&coldkey, &hotkey, stake_to_be_removed);
 
-        // We add the balancer to the coldkey.  If the above fails we will not credit this coldkey.
+        // We add the balance to the coldkey.  If the above fails we will not credit this coldkey.
         Self::add_balance_to_coldkey_account(&coldkey, stake_to_be_removed);
 
+        // If the stake is below the minimum, we clear the nomination from storage.
+        // This only applies to nominator stakes.
+        // If the coldkey does not own the hotkey, it's a nominator stake.
+        let new_stake = Self::get_stake_for_coldkey_and_hotkey(&coldkey, &hotkey);
+        Self::clear_small_nomination_if_required(&hotkey, &coldkey, new_stake);
+
         // Set last block for rate limiting
         let block: u64 = Self::get_current_block_as_u64();
         Self::set_last_tx_block(&coldkey, block);
@@ -679,17 +671,24 @@ impl<T: Config> Pallet<T> {
     /// It also removes the stake entry for the hotkey-coldkey pairing and adjusts the TotalStake
     /// and TotalIssuance by subtracting the removed stake amount.
     ///
+    /// Returns the amount of stake that was removed.
+    ///
     /// # Arguments
     ///
     /// * `coldkey` - A reference to the AccountId of the coldkey involved in the staking.
     /// * `hotkey` - A reference to the AccountId of the hotkey associated with the coldkey.
-    pub fn empty_stake_on_coldkey_hotkey_account(coldkey: &T::AccountId, hotkey: &T::AccountId) {
+    pub fn empty_stake_on_coldkey_hotkey_account(
+        coldkey: &T::AccountId,
+        hotkey: &T::AccountId,
+    ) -> u64 {
         let current_stake: u64 = Stake::<T>::get(hotkey, coldkey);
         TotalColdkeyStake::<T>::mutate(coldkey, |old| *old = old.saturating_sub(current_stake));
         TotalHotkeyStake::<T>::mutate(hotkey, |stake| *stake = stake.saturating_sub(current_stake));
         Stake::<T>::remove(hotkey, coldkey);
         TotalStake::<T>::mutate(|stake| *stake = stake.saturating_sub(current_stake));
         TotalIssuance::<T>::mutate(|issuance| *issuance = issuance.saturating_sub(current_stake));
+
+        current_stake
     }
 
     /// Clears the nomination for an account, if it is a nominator account and the stake is below the minimum required threshold.
@@ -704,9 +703,9 @@ impl<T: Config> Pallet<T> {
             if stake < Self::get_nominator_min_required_stake() {
                 // Remove the stake from the nominator account. (this is a more forceful unstake operation which )
                 // Actually deletes the staking account.
-                Self::empty_stake_on_coldkey_hotkey_account(coldkey, hotkey);
+                let cleared_stake = Self::empty_stake_on_coldkey_hotkey_account(coldkey, hotkey);
                 // Add the stake to the coldkey account.
-                Self::add_balance_to_coldkey_account(coldkey, stake);
+                Self::add_balance_to_coldkey_account(coldkey, cleared_stake);
             }
         }
     }

pallets/subtensor/tests/mock.rs

@@ -141,7 +141,7 @@ parameter_types! {
     pub const InitialAdjustmentInterval: u16 = 100;
     pub const InitialAdjustmentAlpha: u64 = 0; // no weight to previous value.
     pub const InitialMaxRegistrationsPerBlock: u16 = 3;
-    pub const InitialTargetRegistrationsPerInterval: u16 = 2;
+    pub const InitialTargetRegistrationsPerInterval: u16 = 3;
     pub const InitialPruningScore : u16 = u16::MAX;
     pub const InitialRegistrationRequirement: u16 = u16::MAX; // Top 100%
     pub const InitialMinDifficulty: u64 = 1;

pallets/subtensor/tests/registration.rs

@@ -249,9 +249,10 @@ fn test_registration_rate_limit_exceeded() {
         let coldkey_account_id = U256::from(667);
         let who: <Test as frame_system::Config>::AccountId = hotkey_account_id;
 
-        let max_registrants = 1;
-        SubtensorModule::set_target_registrations_per_interval(netuid, max_registrants);
-        SubtensorModule::set_registrations_this_interval(netuid, 1);
+        let target_registrants = 1;
+        let max_registrants = target_registrants * 3;
+        SubtensorModule::set_target_registrations_per_interval(netuid, target_registrants);
+        SubtensorModule::set_registrations_this_interval(netuid, max_registrants);
 
         let (nonce, work) = SubtensorModule::create_work_for_block_number(
             netuid,
@@ -290,18 +291,18 @@ fn test_burned_registration_under_limit() {
         let netuid: u16 = 1;
         let hotkey_account_id: U256 = U256::from(1);
         let coldkey_account_id = U256::from(667);
-        let who: <Test as frame_system::Config>::AccountId = hotkey_account_id;
-        let block_number: u64 = 0;
+        let who: <Test as frame_system::Config>::AccountId = coldkey_account_id;
+        let burn_cost = 1000;
+        // Set the burn cost
+        SubtensorModule::set_burn(netuid, burn_cost);
 
-        let (nonce, work) = SubtensorModule::create_work_for_block_number(
-            netuid,
-            block_number,
-            129123813,
-            &hotkey_account_id,
-        );
+        add_network(netuid, 13, 0); // Add the network
+                                    // Give it some TAO to the coldkey balance; more than the burn cost
+        SubtensorModule::add_balance_to_coldkey_account(&coldkey_account_id, burn_cost + 10_000);
 
-        let max_registrants = 2;
-        SubtensorModule::set_target_registrations_per_interval(netuid, max_registrants);
+        let target_registrants = 2;
+        let max_registrants = target_registrants * 3; // Maximum is 3 times the target
+        SubtensorModule::set_target_registrations_per_interval(netuid, target_registrants);
 
         let call_burned_register: pallet_subtensor::Call<Test> =
             pallet_subtensor::Call::burned_register {
@@ -317,21 +318,15 @@ fn test_burned_registration_under_limit() {
             extension.validate(&who, &call_burned_register.into(), &info, 10);
         assert_ok!(burned_register_result);
 
-        add_network(netuid, 13, 0);
         //actually call register
-        assert_ok!(SubtensorModule::register(
-            <<Test as Config>::RuntimeOrigin>::signed(hotkey_account_id),
+        assert_ok!(SubtensorModule::burned_register(
+            <<Test as Config>::RuntimeOrigin>::signed(coldkey_account_id),
             netuid,
-            block_number,
-            nonce,
-            work,
             hotkey_account_id,
-            coldkey_account_id
         ));
 
         let current_registrants = SubtensorModule::get_registrations_this_interval(netuid);
-        let target_registrants = SubtensorModule::get_target_registrations_per_interval(netuid);
-        assert!(current_registrants <= target_registrants);
+        assert!(current_registrants <= max_registrants);
     });
 }
 
@@ -340,11 +335,15 @@ fn test_burned_registration_rate_limit_exceeded() {
     new_test_ext(1).execute_with(|| {
         let netuid: u16 = 1;
         let hotkey_account_id: U256 = U256::from(1);
-        let who: <Test as frame_system::Config>::AccountId = hotkey_account_id;
-        let max_registrants = 1;
+        let coldkey_account_id = U256::from(667);
+        let who: <Test as frame_system::Config>::AccountId = coldkey_account_id;
 
-        SubtensorModule::set_target_registrations_per_interval(netuid, max_registrants);
-        SubtensorModule::set_registrations_this_interval(netuid, 1);
+        let target_registrants = 1;
+        let max_registrants = target_registrants * 3; // Maximum is 3 times the target
+
+        SubtensorModule::set_target_registrations_per_interval(netuid, target_registrants);
+        // Set the current registrations to the maximum; should not be able to register more
+        SubtensorModule::set_registrations_this_interval(netuid, max_registrants);
 
         let call_burned_register: pallet_subtensor::Call<Test> =
             pallet_subtensor::Call::burned_register {
@@ -369,6 +368,55 @@ fn test_burned_registration_rate_limit_exceeded() {
     });
 }
 
+#[test]
+fn test_burned_registration_rate_allows_burn_adjustment() {
+    // We need to be able to register more than the *target* registrations per interval
+    new_test_ext(1).execute_with(|| {
+        let netuid: u16 = 1;
+        let hotkey_account_id: U256 = U256::from(1);
+        let coldkey_account_id = U256::from(667);
+        let who: <Test as frame_system::Config>::AccountId = coldkey_account_id;
+
+        let burn_cost = 1000;
+        // Set the burn cost
+        SubtensorModule::set_burn(netuid, burn_cost);
+
+        add_network(netuid, 13, 0); // Add the network
+                                    // Give it some TAO to the coldkey balance; more than the burn cost
+        SubtensorModule::add_balance_to_coldkey_account(&coldkey_account_id, burn_cost + 10_000);
+
+        let target_registrants = 1; // Target is 1, but we can register more than that, up to some maximum.
+        SubtensorModule::set_target_registrations_per_interval(netuid, target_registrants);
+        // Set the current registrations to above the target; we should be able to register at least 1 more
+        SubtensorModule::set_registrations_this_interval(netuid, target_registrants);
+
+        // Register one more, so the current registrations are above the target
+        let call_burned_register: pallet_subtensor::Call<Test> =
+            pallet_subtensor::Call::burned_register {
+                netuid,
+                hotkey: hotkey_account_id,
+            };
+
+        let info: DispatchInfo =
+            DispatchInfoOf::<<Test as frame_system::Config>::RuntimeCall>::default();
+        let extension = SubtensorSignedExtension::<Test>::new();
+        //does not actually call register
+        let burned_register_result =
+            extension.validate(&who, &call_burned_register.into(), &info, 10);
+        assert_ok!(burned_register_result);
+
+        //actually call register
+        assert_ok!(SubtensorModule::burned_register(
+            <<Test as Config>::RuntimeOrigin>::signed(coldkey_account_id),
+            netuid,
+            hotkey_account_id
+        ));
+
+        let current_registrants = SubtensorModule::get_registrations_this_interval(netuid);
+        assert!(current_registrants > target_registrants); // Should be able to register more than the target
+    });
+}
+
 #[test]
 fn test_burned_registration_ok() {
     new_test_ext(1).execute_with(|| {

pallets/subtensor/tests/staking.rs

@@ -2698,16 +2698,55 @@ fn test_remove_stake_below_minimum_threshold() {
             stake_amount_to_remove
         ));
 
-        // Nomination stake cannot stake below min threshold.
-        assert_noop!(
-            SubtensorModule::remove_stake(
-                <<Test as Config>::RuntimeOrigin>::signed(coldkey2),
-                hotkey1,
-                stake_amount_to_remove
-            ),
-            Error::<Test>::NomStakeBelowMinimumThreshold
+        // Nomination stake cannot unstake below min threshold,
+        // without unstaking all and removing the nomination.
+        let total_hotkey_stake_before = SubtensorModule::get_total_stake_for_hotkey(&hotkey1);
+        let bal_before = Balances::free_balance(coldkey2);
+        let staked_before = SubtensorModule::get_stake_for_coldkey_and_hotkey(&coldkey2, &hotkey1);
+        let total_network_stake_before = SubtensorModule::get_total_stake();
+        let total_issuance_before = SubtensorModule::get_total_issuance();
+        // check the premise of the test is correct
+        assert!(initial_stake - stake_amount_to_remove < minimum_threshold);
+        assert_ok!(SubtensorModule::remove_stake(
+            <<Test as Config>::RuntimeOrigin>::signed(coldkey2),
+            hotkey1,
+            stake_amount_to_remove
+        ));
+
+        // Has no stake now
+        assert_eq!(
+            SubtensorModule::get_stake_for_coldkey_and_hotkey(&coldkey2, &hotkey1),
+            0
         );
-    })
+        let stake_removed = staked_before; // All stake was removed
+                                           // Has the full balance
+        assert_eq!(Balances::free_balance(coldkey2), bal_before + stake_removed);
+
+        // Stake map entry is removed
+        assert_eq!(
+            Stake::<Test>::try_get(hotkey1, coldkey2).is_err(),
+            true // Entry was removed
+        );
+        // Stake tracking is updated
+        assert_eq!(
+            TotalColdkeyStake::<Test>::try_get(coldkey2).unwrap(),
+            0 // Did not have any stake before; Entry is NOT removed
+        );
+        assert_eq!(
+            TotalHotkeyStake::<Test>::try_get(hotkey1).unwrap(),
+            total_hotkey_stake_before - stake_removed // Stake was removed from hotkey1 tracker
+        );
+        assert_eq!(
+            TotalStake::<Test>::try_get().unwrap(),
+            total_network_stake_before - stake_removed
+        );
+
+        // Total issuance is the same
+        assert_eq!(
+            SubtensorModule::get_total_issuance(),
+            total_issuance_before // Nothing was issued
+        );
+    });
 }
 
 // Verify delegate take can be decreased

runtime/src/lib.rs

@@ -137,7 +137,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
     //   `spec_version`, and `authoring_version` are the same between Wasm and native.
     // This value is set to 100 to notify Polkadot-JS App (https://polkadot.js.org/apps) to use
     //   the compatible custom types.
-    spec_version: 149,
+    spec_version: 150,
     impl_version: 1,
     apis: RUNTIME_API_VERSIONS,
     transaction_version: 1,