Migrate pallet-subtensor's rate limiting to pallet-rate-limiting

Author: ales-otf

Cargo.lock

@@ -393,6 +393,18 @@ pub mod pallet {
             true
         }
 
+        /// Inserts or updates the cached usage timestamp for a rate-limited call.
+        ///
+        /// This is primarily intended for migrations that need to hydrate the new tracking storage
+        /// from legacy pallets.
+        pub fn record_last_seen(
+            identifier: &TransactionIdentifier,
+            usage_key: Option<<T as Config<I>>::UsageKey>,
+            block_number: BlockNumberFor<T>,
+        ) {
+            LastSeen::<T, I>::insert(identifier, usage_key, block_number);
+        }
+
         /// Migrates a stored rate limit configuration from one scope to another.
         ///
         /// Returns `true` when an entry was moved. Passing identical `from`/`to` scopes simply

pallets/rate-limiting/src/lib.rs

@@ -55,6 +55,7 @@ sha2.workspace = true
 rand_chacha.workspace = true
 pallet-crowdloan.workspace = true
 pallet-subtensor-proxy.workspace = true
+pallet-rate-limiting.workspace = true
 
 [dev-dependencies]
 pallet-balances = { workspace = true, features = ["std"] }
@@ -112,6 +113,7 @@ std = [
 	"pallet-crowdloan/std",
 	"pallet-drand/std",
 	"pallet-subtensor-proxy/std",
+	"pallet-rate-limiting/std",
 	"pallet-subtensor-swap/std",
 	"subtensor-swap-interface/std",
 	"pallet-subtensor-utility/std",

pallets/subtensor/Cargo.toml

@@ -53,6 +53,7 @@ sp-inherents.workspace = true
 sp-offchain.workspace = true
 sp-runtime.workspace = true
 sp-session.workspace = true
+sp-io.workspace = true
 sp-std.workspace = true
 sp-transaction-pool.workspace = true
 sp-version.workspace = true
@@ -154,7 +155,6 @@ ethereum.workspace = true
 
 [dev-dependencies]
 frame-metadata.workspace = true
-sp-io.workspace = true
 sp-tracing.workspace = true
 
 [build-dependencies]