diff --git a/src/serialization.rs b/src/serialization.rs
index 11cdcb6..268be56 100644
--- a/src/serialization.rs
+++ b/src/serialization.rs
@@ -1,6 +1,8 @@
-use serde::{Deserialize, Serialize};
+use serde::{Deserialize, Deserializer, Serialize, Serializer};
+use serde::de::Error;
+use sp_client::bitcoin::hex::{DisplayHex, FromHex};
 use sp_client::bitcoin::OutPoint;
-use std::collections::HashMap;
+use std::collections::{BTreeMap, HashMap};
 use crate::{pcd::Member, process::Process};
 
 #[derive(Debug, Serialize, Deserialize)]
@@ -10,10 +12,8 @@ pub struct OutPointMemberMap(#[serde(with = "members_map")] pub HashMap<OutPoint
 pub struct OutPointProcessMap(#[serde(with = "outpoint_map")] pub HashMap<OutPoint, Process>);
 
 pub mod members_map {
+    use super::*;
     use crate::pcd::Member;
-    use serde::{Serialize, Serializer, Deserialize, Deserializer};
-    use std::collections::HashMap;
-    use sp_client::bitcoin::OutPoint;
 
     pub fn serialize<S>(
         map: &HashMap<OutPoint, Member>,
@@ -42,9 +42,7 @@ pub mod members_map {
 }
 
 pub mod outpoint_map {
-    use serde::{Serialize, Serializer, Deserialize, Deserializer};
-    use std::collections::HashMap;
-    use sp_client::bitcoin::OutPoint;
+    use super::*;
     use crate::process::Process;
 
     pub fn serialize<S>(