add impl and tests

Author: camfairchild

pallets/subtensor/src/swap/swap_hotkey.rs

@@ -190,24 +190,33 @@ impl<T: Config> Pallet<T> {
 
         // 5. Swap LastTxBlock
         // LastTxBlock( hotkey ) --> u64 -- the last transaction block for the hotkey.
+        let last_tx_block: u64 = LastTxBlock::<T>::get(old_hotkey);
         LastTxBlock::<T>::remove(old_hotkey);
-        LastTxBlock::<T>::insert(new_hotkey, Self::get_current_block_as_u64());
-        weight.saturating_accrue(T::DbWeight::get().reads_writes(0, 2));
+        LastTxBlock::<T>::insert(new_hotkey, last_tx_block);
+        weight.saturating_accrue(T::DbWeight::get().reads_writes(1, 2));
 
         // 6. Swap LastTxBlockDelegateTake
         // LastTxBlockDelegateTake( hotkey ) --> u64 -- the last transaction block for the hotkey delegate take.
+        let last_tx_block_delegate_take: u64 = LastTxBlockDelegateTake::<T>::get(old_hotkey);
         LastTxBlockDelegateTake::<T>::remove(old_hotkey);
-        LastTxBlockDelegateTake::<T>::insert(new_hotkey, Self::get_current_block_as_u64());
+        LastTxBlockDelegateTake::<T>::insert(new_hotkey, last_tx_block_delegate_take);
+        weight.saturating_accrue(T::DbWeight::get().reads_writes(1, 2));
+
+        // 7. Swap LastTxBlockChildKeyTake
+        // LastTxBlockChildKeyTake( hotkey ) --> u64 -- the last transaction block for the hotkey child key take.
+        let last_tx_block_child_key_take: u64 = LastTxBlockChildKeyTake::<T>::get(old_hotkey);
+        LastTxBlockChildKeyTake::<T>::remove(old_hotkey);
+        LastTxBlockChildKeyTake::<T>::insert(new_hotkey, last_tx_block_child_key_take);
         weight.saturating_accrue(T::DbWeight::get().reads_writes(1, 2));
 
-        // 7. Swap Senate members.
+        // 8. Swap Senate members.
         // Senate( hotkey ) --> ?
         if T::SenateMembers::is_member(old_hotkey) {
             T::SenateMembers::swap_member(old_hotkey, new_hotkey).map_err(|e| e.error)?;
             weight.saturating_accrue(T::DbWeight::get().reads_writes(1, 2));
         }
 
-        // 8. Swap delegates.
+        // 9. Swap delegates.
         // Delegates( hotkey ) -> take value -- the hotkey delegate take value.
         if Delegates::<T>::contains_key(old_hotkey) {
             let old_delegate_take = Delegates::<T>::get(old_hotkey);

pallets/subtensor/src/tests/swap_hotkey.rs

@@ -1387,3 +1387,39 @@ fn test_swap_hotkey_is_sn_owner_hotkey() {
         assert_eq!(SubnetOwnerHotkey::<Test>::get(netuid), new_hotkey);
     });
 }
+
+// SKIP_WASM_BUILD=1 RUST_LOG=debug cargo test --test swap_hotkey -- test_swap_hotkey_swap_rate_limits --exact --nocapture
+#[test]
+fn test_swap_hotkey_swap_rate_limits() {
+    new_test_ext(1).execute_with(|| {
+        let old_hotkey = U256::from(1);
+        let new_hotkey = U256::from(2);
+        let coldkey = U256::from(3);
+        let mut weight = Weight::zero();
+
+        let last_tx_block = 123;
+        let delegate_take_block = 4567;
+        let child_key_take_block = 8910;
+
+        // Set the last tx block for the old hotkey
+        LastTxBlock::<Test>::insert(old_hotkey, last_tx_block);
+        // Set the last delegate take block for the old hotkey
+        LastTxBlockDelegateTake::<Test>::insert(old_hotkey, delegate_take_block);
+        // Set last childkey take block for the old hotkey
+        LastTxBlockChildKeyTake::<Test>::insert(old_hotkey, child_key_take_block);
+
+        // Perform the swap
+        SubtensorModule::perform_hotkey_swap(&old_hotkey, &new_hotkey, &coldkey, &mut weight);
+
+        // Check for new hotkey
+        assert_eq!(LastTxBlock::<Test>::get(new_hotkey), last_tx_block);
+        assert_eq!(
+            LastTxBlockDelegateTake::<Test>::get(new_hotkey),
+            delegate_take_block
+        );
+        assert_eq!(
+            LastTxBlockChildKeyTake::<Test>::get(new_hotkey),
+            child_key_take_block
+        );
+    });
+}