Merge pull request #237 from renlabs-dev/bridge

feat: adding bridge

pallets/subspace/src/lib.rs

@@ -469,6 +469,8 @@ pub mod pallet {
     pub type WeightSettingDelegation<T: Config> =
         StorageDoubleMap<_, Identity, u16, Identity, T::AccountId, T::AccountId>;
 
+    #[pallet::storage]
+    pub type Bridged<T: Config> = StorageMap<_, Identity, T::AccountId, u64, ValueQuery>;
     // --- Module Fees ---
 
     /// Default values for fees used throughout the module
@@ -559,4 +561,10 @@ pub mod pallet {
             Ok(())
         }
     }
+    impl<T: Config> Pallet<T> {
+        /// Dec 24, 2024, 11:11 PM UTC
+        const START_BRIDGE_BLOCK: u64 = 3385177;
+        /// Dec 31, 2024, 11:11 PM UTC
+        const END_BRIDGE_BLOCK: u64 = 3460777;
+    }
 }

pallets/subspace/src/selections/dispatches.rs

@@ -186,5 +186,69 @@ pub mod dispatches {
         ) -> DispatchResult {
             Self::do_register_subnet(origin, name, metadata)
         }
+
+        #[pallet::call_index(13)]
+        #[pallet::weight((Weight::zero(), DispatchClass::Normal, Pays::No))]
+        pub fn bridge(origin: OriginFor<T>, amount: u64) -> DispatchResult {
+            let key = ensure_signed(origin)?;
+
+            let current_block = Self::get_current_block_number();
+            ensure!(
+                (Self::START_BRIDGE_BLOCK..=Self::END_BRIDGE_BLOCK).contains(&current_block),
+                Error::<T>::OutsideValidBlockRange
+            );
+
+            ensure!(
+                Self::has_enough_balance(&key, amount),
+                Error::<T>::NotEnoughBalance
+            );
+
+            // 1. Remove the balance from the account
+            let Some(removed_balance_as_currency) = Self::u64_to_balance(amount) else {
+                return Err(Error::<T>::CouldNotConvertToBalance.into());
+            };
+
+            Self::remove_balance_from_account(&key, removed_balance_as_currency)?;
+
+            Bridged::<T>::mutate(&key, |bridged| *bridged = bridged.saturating_add(amount));
+
+            Self::deposit_event(Event::Bridged(key, amount));
+
+            Ok(())
+        }
+
+        #[pallet::call_index(14)]
+        #[pallet::weight((Weight::zero(), DispatchClass::Normal, Pays::No))]
+        pub fn bridge_withdraw(origin: OriginFor<T>, amount: u64) -> DispatchResult {
+            let key = ensure_signed(origin)?;
+
+            let current_block = Self::get_current_block_number();
+            ensure!(
+                (Self::START_BRIDGE_BLOCK..=Self::END_BRIDGE_BLOCK).contains(&current_block),
+                Error::<T>::OutsideValidBlockRange
+            );
+
+            // Check if user has enough bridged tokens
+            let bridged_amount = Bridged::<T>::get(&key);
+            ensure!(
+                bridged_amount >= amount && amount > 0,
+                Error::<T>::NotEnoughBridgedTokens
+            );
+
+            // Convert amount to balance
+            let Some(amount_as_currency) = Self::u64_to_balance(amount) else {
+                return Err(Error::<T>::CouldNotConvertToBalance.into());
+            };
+
+            // Add balance back to account
+            Self::add_balance_to_account(&key, amount_as_currency);
+
+            // Reduce bridged amount
+            Bridged::<T>::mutate(&key, |bridged| *bridged = bridged.saturating_sub(amount));
+
+            Self::deposit_event(Event::BridgeWithdrawn(key, amount));
+
+            Ok(())
+        }
     }
 }

pallets/subspace/src/selections/errors.rs

@@ -209,5 +209,11 @@ pub mod errors {
         /// Cannot decrease fees below their current values.
         /// Fees can only be increased to prevent economic attacks.
         CannotDecreaseFee,
+        /// General error for not having enough balance
+        NotEnoughBalance,
+        /// Not having enough tokens to bridge back
+        NotEnoughBridgedTokens,
+        /// User is trying to bridge tokens in closed period
+        OutsideValidBlockRange,
     }
 }

pallets/subspace/src/selections/events.rs

@@ -28,5 +28,9 @@ pub mod events {
         GlobalParamsUpdated(GlobalParams<T>),
         /// Event created when subnet parameters are updated
         SubnetParamsUpdated(u16),
+        /// Event created when assets were returned from the bridge
+        BridgeWithdrawn(T::AccountId, u64),
+        /// Event created when user bridged tokens
+        Bridged(T::AccountId, u64),
     }
 }

runtime/src/lib.rs

@@ -204,7 +204,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
     spec_name: create_runtime_str!("node-subspace"),
     impl_name: create_runtime_str!("node-subspace"),
     authoring_version: 1,
-    spec_version: 512,
+    spec_version: 513,
     impl_version: 1,
     apis: RUNTIME_API_VERSIONS,
     transaction_version: 1,
@@ -217,7 +217,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
     spec_name: create_runtime_str!("node-subspace"),
     impl_name: create_runtime_str!("node-subspace"),
     authoring_version: 1,
-    spec_version: 126,
+    spec_version: 127,
     impl_version: 1,
     apis: RUNTIME_API_VERSIONS,
     transaction_version: 1,