diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index c251582..f832165 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -68,7 +68,7 @@ jobs:
         env:
           COLINK_SERVER_MQ_URI: ${{ matrix.mq_uri }}
           COLINK_SERVER_MQ_API: ${{ matrix.mq_api }}
-        run: cargo test
+        run: cargo test --features="storage_macro_dbc"
       - name: Run tests (standalone)
         if: ${{ matrix.mq == 'standalone' }}
-        run: cargo test
+        run: cargo test --features="storage_macro_dbc"
diff --git a/Cargo.toml b/Cargo.toml
index fe0c905..694fb07 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "colink"
-version = "0.3.8"
+version = "0.3.9"
 edition = "2021"
 description = "CoLink Rust SDK"
 license = "MIT"
@@ -50,4 +50,9 @@ variable_transfer = ["extensions", "remote_storage", "hyper", "jsonwebtoken", "r
 registry = []
 policy_module = []
 instant_server = ["reqwest"]
-storage_macro = ["async-recursion", "rdbc2"]
+storage_macro = ["async-recursion"]
+storage_macro_dbc = ["rdbc2"]
+
+[[test]]
+name = "test_storage_macro_dbc"
+required-features = ["storage_macro_dbc"]
diff --git a/README.md b/README.md
index 9b7c947..504d280 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,13 @@ CoLink SDK helps both application and protocol developers access the functionali
 Add this to your Cargo.toml:
 ```toml
 [dependencies]
-colink = "0.3.7"
+colink = "0.3.9"
+```
+
+Enable more features in your Cargo.toml
+```
+# if you use storage macro dbc
+colink = { version = "0.3.9", features = ["storage_macro_dbc"] }
 ```
 
 ## Getting Started
diff --git a/src/application.rs b/src/application.rs
index 823d8d4..b6cf6a4 100644
--- a/src/application.rs
+++ b/src/application.rs
@@ -119,6 +119,13 @@ impl CoLink {
         Ok(self.core_addr.clone())
     }
 
+    pub fn get_jwt(&self) -> Result<String, String> {
+        if self.jwt.is_empty() {
+            return Err("jwt not found".to_string());
+        }
+        Ok(self.jwt.clone())
+    }
+
     pub fn update_jwt(&mut self, new_jwt: &str) -> Result<(), String> {
         self.jwt = new_jwt.to_string();
         Ok(())
diff --git a/src/extensions/storage_macro.rs b/src/extensions/storage_macro.rs
index 3379ff3..fcd5cfb 100644
--- a/src/extensions/storage_macro.rs
+++ b/src/extensions/storage_macro.rs
@@ -1,10 +1,10 @@
-use crate::StorageEntry;
-
 mod append;
 mod chunk;
+#[cfg(feature = "storage_macro_dbc")]
 mod dbc;
 mod fs;
 mod redis;
+use crate::StorageEntry;
 
 type Error = Box<dyn std::error::Error + Send + Sync + 'static>;
 
@@ -66,7 +66,14 @@ impl crate::application::CoLink {
         match macro_type.as_str() {
             "chunk" => self._read_entry_chunk(&string_before).await,
             "redis" => self._read_entry_redis(&string_before, &string_after).await,
+            #[cfg(feature = "storage_macro_dbc")]
             "dbc" => self._read_entry_dbc(&string_before, &string_after).await,
+            #[cfg(not(feature = "storage_macro_dbc"))]
+            "dbc" => Err(format!(
+                "Storage Macro DBC feature not enabled, but found $dbc in key name: {}",
+                key_name
+            )
+            .into()),
             "fs" => self._read_entry_fs(&string_before, &string_after).await,
             _ => Err(format!(
                 "invalid storage macro, found {} in key name {}",