diff --git a/src/api.rs b/src/api.rs
index 96555f2..644d5dd 100644
--- a/src/api.rs
+++ b/src/api.rs
@@ -1350,17 +1350,17 @@ pub fn update_process(
 
 #[wasm_bindgen]
 pub fn create_update_message(
-    init_commitment: String,
-    merkle_root_hex: String,
+    process_id: String,
+    state_id: String,
 ) -> ApiResult<ApiReturn> {
     let mut processes = lock_processes()?;
 
-    let outpoint = OutPoint::from_str(&init_commitment)?;
+    let process_id = OutPoint::from_str(&process_id)?;
 
-    let process = processes.get_mut(&outpoint)
+    let process = processes.get_mut(&process_id)
         .ok_or(ApiError::new("Unknown process".to_owned()))?;
 
-    let update_state = process.get_state_for_id(&merkle_root_hex)?;
+    let update_state = process.get_state_for_id(&state_id)?;
 
     // We must have at least the key for the roles field, otherwise we don't know who to send the message to
     let clear_state = update_state.decrypt_pcd()?;
@@ -1402,7 +1402,7 @@ pub fn create_update_message(
         .to_member();
 
     let full_prd = Prd::new_update(
-        outpoint,
+        process_id,
         sender,
         roles,
         update_state.keys.clone(),
@@ -1430,10 +1430,6 @@ pub fn create_update_message(
         }
     }
 
-    if ciphers.is_empty() {
-        return Err(ApiError::new("Empty ciphers list".to_owned()));
-    }
-
     Ok(ApiReturn {
         ciphers_to_send: ciphers,
         ..Default::default()