diff --git a/services/blob/src/http/handlers/holders.rs b/services/blob/src/http/handlers/holders.rs
--- a/services/blob/src/http/handlers/holders.rs
+++ b/services/blob/src/http/handlers/holders.rs
@@ -4,13 +4,7 @@
 use tracing::{info, instrument, trace, warn};
 
 use crate::service::BlobService;
-
-#[derive(Serialize, Deserialize, Debug)]
-#[serde(rename_all = "camelCase")]
-pub struct BlobHashAndHolder {
-  blob_hash: String,
-  holder: String,
-}
+use crate::types::BlobHashAndHolder;
 
 #[derive(Deserialize, Debug)]
 #[serde(rename_all = "camelCase")]
diff --git a/services/blob/src/main.rs b/services/blob/src/main.rs
--- a/services/blob/src/main.rs
+++ b/services/blob/src/main.rs
@@ -5,6 +5,7 @@
 pub mod s3;
 pub mod service;
 pub mod tools;
+pub mod types;
 
 use anyhow::Result;
 use comm_lib::auth::AuthService;
diff --git a/services/blob/src/types.rs b/services/blob/src/types.rs
new file mode 100644
--- /dev/null
+++ b/services/blob/src/types.rs
@@ -0,0 +1,8 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize, Debug)]
+#[serde(rename_all = "camelCase")]
+pub struct BlobHashAndHolder {
+  pub blob_hash: String,
+  pub holder: String,
+}