Update dash-spv/src/storage/memory.rs

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: QuantumExplorer

dash-spv/src/storage/memory.rs

@@ -152,25 +152,15 @@ impl StorageManager for MemoryStorageManager {
     }
 
     async fn get_header(&self, height: u32) -> StorageResult<Option<BlockHeader>> {
-        // Accept blockchain (absolute) height; convert to storage index using base (if any)
-        let base = match self.load_sync_state().await {
-            Ok(Some(state)) if state.synced_from_checkpoint && state.sync_base_height > 0 => {
-                state.sync_base_height
-            }
-            _ => 0u32,
-        };
-
-        // If a base is present and the requested height is below the base, no header exists.
-        if base > 0 && height < base {
-            return Ok(None);
-        }
-        // Map absolute height to storage index
-        let idx = if base > 0 {
-            (height - base) as usize
-        } else {
-            height as usize
-        };
-        Ok(self.headers.get(idx).copied())
+async fn get_header(&self, height: u32) -> StorageResult<Option<BlockHeader>> {
+    let sync_base_height = *self.sync_base_height.read().await;
+    if sync_base_height > 0 && height < sync_base_height {
+        return Ok(None);
+    }
+    // Convert absolute height to storage index (base-inclusive mapping)
+    let idx = (height.saturating_sub(sync_base_height)) as usize;
+    Ok(self.headers.get(idx).cloned())
+}
     }
 
     async fn get_tip_height(&self) -> StorageResult<Option<u32>> {