Hotfix/no registration no emission

pallets/subtensor/src/block_step.rs

@@ -109,9 +109,9 @@ impl<T: Config> Pallet<T> {
     pub fn generate_emission(block_number: u64) {
         // --- 1. Iterate across each network and add pending emission into stash.
         for (netuid, tempo) in <Tempo<T> as IterableStorageMap<u16, u16>>::iter() {
-            // Skip the root network.
-            if netuid == Self::get_root_netuid() {
-                // Root emission is burned.
+            // Skip the root network or subnets with registrations turned off
+            if netuid == Self::get_root_netuid() || !Self::is_registration_allowed(netuid) {
+                // Root emission or subnet emission is burned
                 continue;
             }
 

pallets/subtensor/src/root.rs

@@ -286,6 +286,24 @@ impl<T: Config> Pallet<T> {
         Self::deposit_event(Event::NetworkRateLimitSet(limit));
     }
 
+    /// Checks if registrations are allowed for a given subnet.
+    ///
+    /// This function retrieves the subnet hyperparameters for the specified subnet and checks the `registration_allowed` flag.
+    /// If the subnet doesn't exist or doesn't have hyperparameters defined, it returns `false`.
+    ///
+    /// # Arguments
+    ///
+    /// * `netuid` - The unique identifier of the subnet.
+    ///
+    /// # Returns
+    ///
+    /// * `bool` - `true` if registrations are allowed for the subnet, `false` otherwise.
+    pub fn is_registration_allowed(netuid: u16) -> bool {
+        Self::get_subnet_hyperparams(netuid)
+            .map(|params| params.registration_allowed)
+            .unwrap_or(false)
+    }
+
     // Computes and sets emission values for the root network which determine the emission for all subnets.
     //
     // This function is responsible for calculating emission based on network weights, stake values,

pallets/subtensor/src/subnet_info.rs

@@ -40,7 +40,7 @@ pub struct SubnetHyperparams {
     weights_rate_limit: Compact<u64>,
     adjustment_interval: Compact<u16>,
     activity_cutoff: Compact<u16>,
-    registration_allowed: bool,
+    pub registration_allowed: bool,
     target_regs_per_interval: Compact<u16>,
     min_burn: Compact<u64>,
     max_burn: Compact<u64>,

pallets/subtensor/tests/block_step.rs

@@ -803,3 +803,70 @@ fn test_burn_adjustment_case_e_zero_registrations() {
         assert_eq!(adjusted_diff, 5_000);
     });
 }
+
+#[test]
+fn test_emission_based_on_registration_status() {
+    new_test_ext(1).execute_with(|| {
+        let n: u16 = 100;
+        let netuid_off: u16 = 1;
+        let netuid_on: u16 = 2;
+        let tempo: u16 = 1;
+        let netuids: Vec<u16> = vec![netuid_off, netuid_on];
+        let emissions: Vec<u64> = vec![1000000000, 1000000000];
+
+        // Add subnets with registration turned off and on
+        add_network(netuid_off, tempo, 0);
+        add_network(netuid_on, tempo, 0);
+        SubtensorModule::set_max_allowed_uids(netuid_off, n);
+        SubtensorModule::set_max_allowed_uids(netuid_on, n);
+        SubtensorModule::set_emission_values(&netuids, emissions).unwrap();
+        SubtensorModule::set_network_registration_allowed(netuid_off, false);
+        SubtensorModule::set_network_registration_allowed(netuid_on, true);
+
+        // Populate the subnets with neurons
+        for i in 0..n {
+            SubtensorModule::append_neuron(netuid_off, &U256::from(i), 0);
+            SubtensorModule::append_neuron(netuid_on, &U256::from(i), 0);
+        }
+
+        // Generate emission at block 0
+        let block: u64 = 0;
+        SubtensorModule::generate_emission(block);
+
+        // Verify that no emission tuples are loaded for the subnet with registration off
+        assert!(SubtensorModule::get_loaded_emission_tuples(netuid_off).is_none());
+
+        // Verify that emission tuples are loaded for the subnet with registration on
+        assert!(SubtensorModule::get_loaded_emission_tuples(netuid_on).is_some());
+        assert_eq!(
+            SubtensorModule::get_loaded_emission_tuples(netuid_on)
+                .unwrap()
+                .len(),
+            n as usize
+        );
+
+        // Step to the next epoch block
+        let epoch_block: u16 = tempo;
+        step_block(epoch_block);
+
+        // Verify that no emission tuples are loaded for the subnet with registration off
+        assert!(SubtensorModule::get_loaded_emission_tuples(netuid_off).is_none());
+        log::info!(
+            "Emissions for netuid with registration off: {:?}",
+            SubtensorModule::get_loaded_emission_tuples(netuid_off)
+        );
+
+        // Verify that emission tuples are loaded for the subnet with registration on
+        assert!(SubtensorModule::get_loaded_emission_tuples(netuid_on).is_some());
+        log::info!(
+            "Emissions for netuid with registration on: {:?}",
+            SubtensorModule::get_loaded_emission_tuples(netuid_on)
+        );
+        assert_eq!(
+            SubtensorModule::get_loaded_emission_tuples(netuid_on)
+                .unwrap()
+                .len(),
+            n as usize
+        );
+    });
+}