get_state_for_commitments_root mut and immut version

src/process.rs

@@ -335,7 +335,25 @@ impl Process {
         }
     }
 
-    pub fn get_state_for_commitments_root(&mut self, merkle_root: [u8; 32]) -> anyhow::Result<&mut ProcessState> {
+    pub fn get_state_for_commitments_root(&self, merkle_root: &str) -> anyhow::Result<&ProcessState> {
+        if self.get_number_of_states() == 0 {
+            // This should never happen, but we better get rid of it now
+            return Err(anyhow::Error::msg("process is empty".to_owned()));
+        }
+
+        for p in self.get_latest_concurrent_states()? {
+            if p.is_empty() {
+                continue;
+            }
+            if merkle_root == p.merkle_root.as_str() { 
+                return Ok(p);
+            }
+        }
+
+        return Err(anyhow::Error::msg("No state for this merkle root"));
+    }
+
+    pub fn get_state_for_commitments_root_mut(&mut self, merkle_root: &str) -> anyhow::Result<&mut ProcessState> {
         if self.get_number_of_states() == 0 {
             // This should never happen, but we better get rid of it now
             return Err(anyhow::Error::msg("process is empty".to_owned()));
@@ -345,8 +363,7 @@ impl Process {
             if p.is_empty() {
                 continue;
             }
-            let root = <Value as Pcd>::create_merkle_tree(&p.pcd_commitment).unwrap().root().unwrap();
+            if merkle_root == p.merkle_root.as_str() { 
-            if merkle_root == root { 
                 return Ok(p);
             }
         }