diff --git a/crates/rooch-config/src/da_config.rs b/crates/rooch-config/src/da_config.rs
index f3e420dfa9..83dd59fe52 100644
--- a/crates/rooch-config/src/da_config.rs
+++ b/crates/rooch-config/src/da_config.rs
@@ -62,17 +62,27 @@ impl FromStr for InternalDAServerConfigType {
     type Err = String;
 
     fn from_str(s: &str) -> Result<Self, Self::Err> {
-        let v: Value = serde_json::from_str(s).map_err(|_| format!("Invalid JSON: {}", s))?;
+        let v: Value =
+            serde_json::from_str(s).map_err(|e| format!("Error parsing JSON: {}, {}", e, s))?;
 
         if let Some(obj) = v.as_object() {
             if let Some(celestia) = obj.get("celestia") {
                 let celestia_config: DAServerCelestiaConfig =
-                    serde_json::from_value(celestia.clone())
-                        .map_err(|_| format!("invalid celestia config: {}", celestia))?;
+                    serde_json::from_value(celestia.clone()).map_err(|e| {
+                        format!(
+                            "invalid celestia config: {} error: {}, original: {}",
+                            celestia, e, s
+                        )
+                    })?;
                 Ok(InternalDAServerConfigType::Celestia(celestia_config))
             } else if let Some(openda) = obj.get("open-da") {
                 let openda_config: DAServerOpenDAConfig = serde_json::from_value(openda.clone())
-                    .map_err(|_| format!("invalid open-da config: {}", openda))?;
+                    .map_err(|e| {
+                        format!(
+                            "invalid open-da config: {}, error: {}, original: {}",
+                            openda, e, s
+                        )
+                    })?;
                 Ok(InternalDAServerConfigType::OpenDA(openda_config))
             } else {
                 Err(format!("Invalid value: {}", s))
@@ -431,4 +441,59 @@ mod tests {
 
         assert!(output.is_err());
     }
+
+    #[test]
+    fn test_internal_da_server_config_str() {
+        let celestia_config_str = r#"{"celestia": {"namespace": "test_namespace", "conn": "test_conn", "auth_token": "test_token", "max_segment_size": 2048}}"#;
+        let openda_config_str = r#"{"open-da": {"scheme": "gcs", "config": {"Param1": "value1", "param2": "Value2"}, "max_segment_size": 2048}}"#;
+        let invalid_config_str = r#"{"unknown": {...}}"#;
+
+        match InternalDAServerConfigType::from_str(celestia_config_str) {
+            Ok(InternalDAServerConfigType::Celestia(celestia_config)) => {
+                assert_eq!(
+                    celestia_config,
+                    DAServerCelestiaConfig {
+                        namespace: Some("test_namespace".to_string()),
+                        conn: Some("test_conn".to_string()),
+                        auth_token: Some("test_token".to_string()),
+                        max_segment_size: Some(2048),
+                    }
+                );
+            }
+            Ok(_) => {
+                panic!("Expected Celestia Config");
+            }
+            Err(e) => {
+                panic!("Error parsing Celestia Config: {}", e)
+            }
+        }
+
+        let mut config: HashMap<String, String> = HashMap::new();
+        config.insert("Param1".to_string(), "value1".to_string());
+        config.insert("param2".to_string(), "Value2".to_string());
+
+        match InternalDAServerConfigType::from_str(openda_config_str) {
+            Ok(InternalDAServerConfigType::OpenDA(openda_config)) => {
+                assert_eq!(
+                    openda_config,
+                    DAServerOpenDAConfig {
+                        scheme: OpenDAScheme::GCS,
+                        config,
+                        max_segment_size: Some(2048),
+                    }
+                );
+            }
+            Ok(_) => {
+                panic!("Expected OpenDA Config");
+            }
+            Err(e) => {
+                panic!("Error parsing OpenDA Config: {}", e)
+            }
+        }
+
+        if let Err(_) = InternalDAServerConfigType::from_str(invalid_config_str) {
+        } else {
+            panic!("Expected Error for invalid config");
+        }
+    }
 }
diff --git a/crates/rooch-da/src/server/openda/actor/server.rs b/crates/rooch-da/src/server/openda/actor/server.rs
index 058b88d025..e924046c4d 100644
--- a/crates/rooch-da/src/server/openda/actor/server.rs
+++ b/crates/rooch-da/src/server/openda/actor/server.rs
@@ -7,6 +7,7 @@ use coerce::actor::context::ActorContext;
 use coerce::actor::message::Handler;
 use coerce::actor::Actor;
 use opendal::{Operator, Scheme};
+use std::collections::HashMap;
 
 use rooch_config::da_config::{DAServerOpenDAConfig, OpenDAScheme};
 
@@ -29,15 +30,47 @@ impl Actor for DAServerOpenDAActor {}
 // TODO add FEC get for SDC protection (wrong response attacks)
 impl DAServerOpenDAActor {
     pub async fn new(cfg: &DAServerOpenDAConfig) -> Result<DAServerOpenDAActor> {
-        let config = cfg.clone();
+        let mut config = cfg.clone();
 
         let op: Operator = match config.scheme {
             OpenDAScheme::S3 => Operator::via_map(Scheme::S3, config.config)?,
-            OpenDAScheme::GCS => Operator::via_map(Scheme::Gcs, config.config)?,
+            OpenDAScheme::GCS => {
+                // If certain keys don't exist in the map, set them from environment
+                if !config.config.contains_key("bucket") {
+                    if let Ok(bucket) = std::env::var("OPENDA_GCS_BUCKET") {
+                        config.config.insert("bucket".to_string(), bucket);
+                    }
+                }
+                if !config.config.contains_key("root") {
+                    if let Ok(root) = std::env::var("OPENDA_GCS_ROOT") {
+                        config.config.insert("root".to_string(), root);
+                    }
+                }
+                if !config.config.contains_key("credential") {
+                    if let Ok(credential) = std::env::var("OPENDA_GCS_CREDENTIAL") {
+                        config.config.insert("credential".to_string(), credential);
+                    }
+                }
+                insert_default_from_env_or_const(
+                    &mut config.config,
+                    "predefined_acl",
+                    "OPENDA_GCS_PREDEFINED_ACL",
+                    "publicRead",
+                );
+                insert_default_from_env_or_const(
+                    &mut config.config,
+                    "default_storage_class",
+                    "OPENDA_GCS_DEFAULT_STORAGE_CLASS",
+                    "STANDARD",
+                );
+
+                // After setting defaults, proceed with creating Operator
+                Operator::via_map(Scheme::Gcs, config.config)?
+            }
         };
 
         Ok(Self {
-            max_segment_size: cfg.max_segment_size.unwrap() as usize,
+            max_segment_size: cfg.max_segment_size.unwrap_or(4 * 1024 * 1024) as usize,
             operator: op,
         })
     }
@@ -78,6 +111,18 @@ impl DAServerOpenDAActor {
     }
 }
 
+fn insert_default_from_env_or_const(
+    config: &mut HashMap<String, String>,
+    key: &str,
+    env_var: &str,
+    const_default: &str,
+) {
+    if !config.contains_key(key) {
+        let value = std::env::var(env_var).unwrap_or(const_default.to_string());
+        config.insert(key.to_string(), value);
+    }
+}
+
 #[async_trait]
 impl Handler<PutBatchMessage> for DAServerOpenDAActor {
     async fn handle(