feat: add get_base_storage_address at storage_map

src/libraries/storage_map.cairo

@@ -54,6 +54,10 @@ pub impl Felt252MapImpl<T, +Drop<T>, impl TStore: Store<T>> of Felt252MapTrait<T
         Felt252Map { address_domain, base }
     }
 
+    fn get_base_storage_address(self: @Felt252Map<T>) -> (u32, StorageBaseAddress) {
+        (*self.address_domain, *self.base)
+    }
+
     fn address_at(self: @Felt252Map<T>, key: felt252) -> felt252 {
         let base_storage_address: felt252 = storage_address_from_base(*self.base).into();
 
@@ -84,7 +88,6 @@ pub impl Felt252MapImpl<T, +Drop<T>, impl TStore: Store<T>> of Felt252MapTrait<T
 pub type StorageMap<K, V> = Felt252Map<V>;
 
 pub trait StorageMapTrait<K, V> {
-    fn fetch(address_domain: u32, base: StorageBaseAddress) -> StorageMap<K, V>;
     fn address_at(self: @StorageMap<K, V>, key: K) -> felt252;
     fn read_at(self: @StorageMap<K, V>, key: K) -> V;
     fn write_at(ref self: StorageMap<K, V>, key: K, value: V);
@@ -93,11 +96,6 @@ pub trait StorageMapTrait<K, V> {
 impl StorageMapIntoImpl<
     K, V, +Into<K, felt252>, +Drop<K>, +Drop<V>, impl TStore: Store<V>
 > of StorageMapTrait<K, V> {
-    #[inline]
-    fn fetch(address_domain: u32, base: StorageBaseAddress) -> StorageMap<K, V> {
-        Felt252Map { address_domain, base }
-    }
-
     fn address_at(self: @StorageMap<K, V>, key: K) -> felt252 {
         Felt252MapTrait::address_at(self, key.into())
     }
@@ -114,11 +112,6 @@ impl StorageMapIntoImpl<
 impl StorageMapHashImpl<
     K, V, +Hash<K, HashState>, +Drop<K>, +Drop<V>, impl TStore: Store<V>
 > of StorageMapTrait<K, V> {
-    #[inline]
-    fn fetch(address_domain: u32, base: StorageBaseAddress) -> StorageMap<K, V> {
-        Felt252Map { address_domain, base }
-    }
-
     fn address_at(self: @StorageMap<K, V>, key: K) -> felt252 {
         Felt252MapTrait::address_at(self, PoseidonTrait::new().update_with(key).finalize())
     }