Refactor handling of prd update

src/api.rs

@@ -878,26 +878,13 @@ fn handle_prd(
 
             let commited_in = relevant_process.get_process_tip()?;
 
-            // Extract the roles from the payload
-            let proposal_roles: BTreeMap<String, RoleDefinition> = serde_json::from_str(&prd.payload)?;
-
-            // TODO: check that the role in the prd has the right commitment
-
-            // TODO: now that roles is not part of the pcd anymore, we need to think of a way to secure it
-            // Take the roles from the last validated state
-            let mut roles = if let Some(last_state) = relevant_process.get_latest_commited_state() {
-                last_state.roles.clone()
-            } else {
-                // We don't have commited state yet, let's take the current roles
-                proposal_roles
-            };
-
             let new_state = ProcessState {
                 commited_in,
                 pcd_commitment: prd.pcd_commitments,
                 state_id: update_merkle_root.clone(),
                 keys: prd.keys,
-                roles,
+                roles: prd.roles,
+                public_data: prd.public_data,
                 ..Default::default()
             };