diff --git a/custom-pallets/anonymous-account/Cargo.toml b/custom-pallets/anonymous-account/Cargo.toml
index e3da27e..3000630 100644
--- a/custom-pallets/anonymous-account/Cargo.toml
+++ b/custom-pallets/anonymous-account/Cargo.toml
@@ -18,11 +18,12 @@ scale-info = { workspace = true }
 frame-benchmarking = { workspace = true, optional = true }
 frame-support = { workspace = true }
 frame-system = { workspace = true }
+sp-io = { workspace = true }
+sp-runtime = { workspace = true }
+
 
 [dev-dependencies]
 sp-core = { workspace = true }
-sp-io = { workspace = true }
-sp-runtime = { workspace = true }
 
 [features]
 default = ["std"]
diff --git a/custom-pallets/anonymous-account/src/extras.rs b/custom-pallets/anonymous-account/src/extras.rs
new file mode 100644
index 0000000..2d1d9cf
--- /dev/null
+++ b/custom-pallets/anonymous-account/src/extras.rs
@@ -0,0 +1,17 @@
+use super::*;
+
+use sp_io::hashing::blake2_256;
+use sp_runtime::AccountId32;
+
+impl<T: Config> Pallet<T> {
+	pub fn update_hash_incrementally(current_hash: [u8; 32], account_id: Vec<u8>) -> [u8; 32] {
+		let mut input_data = Vec::new();
+
+		// Extend input data with the current hash and the new account ID
+		input_data.extend_from_slice(&current_hash);
+		input_data.extend_from_slice(account_id.as_ref());
+
+		// Recalculate the hash with the new account ID
+		blake2_256(&input_data)
+	}
+}
diff --git a/custom-pallets/anonymous-account/src/lib.rs b/custom-pallets/anonymous-account/src/lib.rs
index 032342d..4fee8bf 100644
--- a/custom-pallets/anonymous-account/src/lib.rs
+++ b/custom-pallets/anonymous-account/src/lib.rs
@@ -13,12 +13,14 @@ mod tests;
 
 #[cfg(feature = "runtime-benchmarks")]
 mod benchmarking;
+pub mod extras;
 pub mod weights;
 pub use weights::*;
 
 pub type DepartmentId = u64;
+use sp_runtime::AccountId32;
 
-#[frame_support::pallet]
+#[frame_support::pallet(dev_mode)]
 pub mod pallet {
 	use super::*;
 	use frame_support::pallet_prelude::*;
@@ -55,6 +57,15 @@ pub mod pallet {
 	pub type HashByRange<T: Config> =
 		StorageMap<_, Blake2_128Concat, (DepartmentId, u32, u32), [u8; 32]>;
 
+	#[pallet::type_value]
+	pub fn DefaultSliceRange() -> u32 {
+		100
+	}
+
+	#[pallet::storage]
+	#[pallet::getter(fn slice_range)]
+	pub type SliceRange<T: Config> = StorageValue<_, u32, ValueQuery, DefaultSliceRange>;
+
 	// Pallets use events to inform users when important changes are made.
 	// https://docs.substrate.io/main-docs/build/events-errors/
 	#[pallet::event]
@@ -72,6 +83,7 @@ pub mod pallet {
 		NoneValue,
 		/// Errors should have helpful documentation associated with them.
 		StorageOverflow,
+		InvalidLength,
 	}
 
 	// Dispatchable functions allows users to interact with the pallet and invoke state changes.
@@ -79,21 +91,23 @@ pub mod pallet {
 	// Dispatchable functions must be annotated with a weight and must return a DispatchResult.
 	#[pallet::call]
 	impl<T: Config> Pallet<T> {
-		/// An example dispatchable that takes a singles value as a parameter, writes the value to
-		/// storage and emits an event. This function must be dispatched by a signed extrinsic.
 		#[pallet::call_index(0)]
-		#[pallet::weight(T::WeightInfo::do_something())]
-		pub fn do_something(origin: OriginFor<T>, something: u32) -> DispatchResult {
+		#[pallet::weight(0)]
+		pub fn calculate_hash(origin: OriginFor<T>) -> DispatchResult {
 			// Check that the extrinsic was signed and get the signer.
 			// This function will return an error if the extrinsic is not signed.
 			// https://docs.substrate.io/main-docs/build/origins/
 			let who = ensure_signed(origin)?;
 
-			// Update storage.
-			<Something<T>>::put(something);
+			// let account_id_bytes: [u8; 32] = who.encode();
+			let current_hash: [u8; 32] = [0; 32];
+
+			// let account_id: AccountId32 = AccountId32::new(account_id_bytes);
+
+			let hash = Self::update_hash_incrementally(current_hash, who.encode());
+
+			// println!("hash {:?}", hash);
 
-			// Emit an event.
-			Self::deposit_event(Event::SomethingStored { something, who });
 			// Return a successful DispatchResultWithPostInfo
 			Ok(())
 		}
diff --git a/custom-pallets/anonymous-account/src/tests.rs b/custom-pallets/anonymous-account/src/tests.rs
index 0210475..36ef1cd 100644
--- a/custom-pallets/anonymous-account/src/tests.rs
+++ b/custom-pallets/anonymous-account/src/tests.rs
@@ -3,31 +3,21 @@ use frame_support::{assert_noop, assert_ok};
 
 #[test]
 fn it_works_for_default_value() {
-    new_test_ext().execute_with(|| {
-        // Go past genesis block so events get deposited
-        System::set_block_number(1);
-        // Dispatch a signed extrinsic.
-        assert_ok!(TemplateModule::do_something(RuntimeOrigin::signed(1), 42));
-        // Read pallet storage and assert an expected result.
-        assert_eq!(TemplateModule::something(), Some(42));
-        // Assert that the correct event was deposited
-        System::assert_last_event(
-            Event::SomethingStored {
-                something: 42,
-                who: 1,
-            }
-            .into(),
-        );
-    });
+	new_test_ext().execute_with(|| {
+		// Go past genesis block so events get deposited
+		System::set_block_number(1);
+		// Dispatch a signed extrinsic.
+		assert_ok!(TemplateModule::calculate_hash(RuntimeOrigin::signed(1)));
+	});
 }
 
 #[test]
 fn correct_error_for_none_value() {
-    new_test_ext().execute_with(|| {
-        // Ensure the expected error is thrown when no value is present.
-        assert_noop!(
-            TemplateModule::cause_error(RuntimeOrigin::signed(1)),
-            Error::<Test>::NoneValue
-        );
-    });
+	new_test_ext().execute_with(|| {
+		// Ensure the expected error is thrown when no value is present.
+		assert_noop!(
+			TemplateModule::cause_error(RuntimeOrigin::signed(1)),
+			Error::<Test>::NoneValue
+		);
+	});
 }