diff --git a/crates/storage/src/error.rs b/crates/storage/src/error.rs
new file mode 100644
index 00000000..8333a2cf
--- /dev/null
+++ b/crates/storage/src/error.rs
@@ -0,0 +1,5 @@
+#[derive(Debug, thiserror::Error)]
+pub enum Error {
+    #[error("storage error: {0}")]
+    Storage(#[from] crate::api::Error),
+}
diff --git a/crates/storage/src/lib.rs b/crates/storage/src/lib.rs
index bb27e949..de5f20df 100644
--- a/crates/storage/src/lib.rs
+++ b/crates/storage/src/lib.rs
@@ -1,5 +1,6 @@
 mod api;
 pub mod backend;
+mod error;
 mod store;
 
 pub use api::{ALL_TABLES, StorageBackend, StorageReadView, StorageWriteBatch, Table};
diff --git a/crates/storage/src/store.rs b/crates/storage/src/store.rs
index bd36bb59..3aea2a18 100644
--- a/crates/storage/src/store.rs
+++ b/crates/storage/src/store.rs
@@ -1,7 +1,8 @@
 use std::collections::{BTreeMap, HashMap, HashSet, VecDeque};
 use std::sync::{Arc, LazyLock, Mutex};
 
-use crate::api::{Error, StorageBackend, StorageWriteBatch, Table};
+use crate::api::{StorageBackend, StorageWriteBatch, Table};
+use crate::error::Error;
 
 use ethlambda_types::{
     attestation::{AggregationBits, AttestationData, HashedAttestationData, bits_is_subset},