diff --git a/src/api.rs b/src/api.rs
index f4e55c6..b02bbfe 100644
--- a/src/api.rs
+++ b/src/api.rs
@@ -1303,13 +1303,13 @@ pub fn create_update_message(
 
     let mut all_members: HashMap<Member, HashSet<String>> = HashMap::new();
     let shared_secrets = lock_shared_secrets()?;
-    for (name, role) in roles {
+    for (name, role) in &roles {
         let fields: Vec<String> = role
             .validation_rules
             .iter()
             .flat_map(|rule| rule.fields.clone())
             .collect();
-        for member in role.members {
+        for member in &role.members {
             // Check that we have a shared_secret with all members
             if let Some(no_secret_address) = member.get_addresses().iter()
                 .find(|a| shared_secrets.get_secret_for_address(a.as_str().try_into().unwrap()).is_none()) 
@@ -1330,15 +1330,10 @@ pub fn create_update_message(
     let sender: Member = local_device
         .to_member();
 
-    // To allow the recipient to identify the pcd that contains only encrypted values, we compute the merkle tree of the encrypted pcd
-    // we then put the root in the payload of the prd update
-    let encrypted_pcd_hash = update_state.encrypted_pcd.hash_all_fields(OutPoint::null())?;
-    let encrypted_pcd_merkle_root = <Value as Pcd>::create_merkle_tree(&Value::Object(encrypted_pcd_hash))?.root().unwrap();
-
     let full_prd = Prd::new_update(
         outpoint,
         serde_json::to_string(&sender)?,
-        serialize(&encrypted_pcd_merkle_root).to_lower_hex_string(),
+        roles,
         update_state.keys.clone(),
         update_state.pcd_commitment.clone(),
     );
@@ -1368,14 +1363,7 @@ pub fn create_update_message(
         return Err(ApiError::new("Empty ciphers list".to_owned()));
     }
 
-    let updated_process = UpdatedProcess {
-        commitment_tx: outpoint,
-        current_process: process.clone(),
-        ..Default::default()
-    };
-
     Ok(ApiReturn {
-        updated_process: Some(updated_process),
         ciphers_to_send: ciphers,
         ..Default::default()
     })