small change to ad elements

crates/derive/src/traits/data_sources.rs

@@ -30,6 +30,8 @@ pub trait EigenDABlobProvider {
     type Error: Display + ToString + Into<PipelineErrorKind>;
 
     async fn get_blob(&mut self, cert: &Bytes) -> Result<Bytes, Self::Error>;
+
+    async fn get_element(&mut self, cert: &Bytes, element: &Bytes) -> Result<Bytes, Self::Error>;
 }
 
 

crates/proof-sdk/proof/src/altda/eigenda_provider.rs

@@ -39,4 +39,24 @@ impl<T: CommsClient + Sync + Send> EigenDABlobProvider for OracleEigenDAProvider
             .map_err(OracleProviderError::Preimage)?;        
         Ok(data.into())
     }
+
+    async fn get_element(&mut self, cert: &Bytes, element: &Bytes) -> Result<Bytes, Self::Error> {
+        self.oracle
+            .write(&HintType::AltDACommitment.encode_with(&[&cert]))
+            .await
+            .map_err(OracleProviderError::Preimage)?;
+
+        let cert_point_key = Bytes::copy_from_slice(&[cert.to_vec(), element.to_vec()].concat());
+
+        self.oracle
+            .write(&HintType::AltDACommitment.encode_with(&[&cert_point_key]))
+            .await
+            .map_err(OracleProviderError::Preimage)?;
+        let data = self
+            .oracle
+            .get(PreimageKey::new(*keccak256(cert_point_key), PreimageKeyType::GlobalGeneric))
+            .await
+            .map_err(OracleProviderError::Preimage)?;        
+        Ok(data.into())
+    }
 }