diff --git a/src/network.rs b/src/network.rs
index c988ff1..858c623 100644
--- a/src/network.rs
+++ b/src/network.rs
@@ -4,9 +4,8 @@ use anyhow::Result;
 use rand::{thread_rng, RngCore};
 use serde::{Deserialize, Serialize};
 use serde_json::Value;
-use sp_client::bitcoin::consensus::serialize;
 use sp_client::bitcoin::hex::DisplayHex;
-use sp_client::bitcoin::{OutPoint, Transaction};
+use sp_client::bitcoin::OutPoint;
 use tsify::Tsify;
 
 use crate::error::AnkError;
@@ -74,7 +73,7 @@ impl AnkFlag {
 #[derive(Debug, PartialEq, Clone, Serialize, Deserialize, Tsify)]
 #[tsify(into_wasm_abi, from_wasm_abi)]
 pub struct CommitMessage {
-    pub init_tx: String, // Can be tx or txid of the first transaction of the chain, which is maybe not ideal
+    pub process_id: OutPoint, 
     pub pcd_commitment: Value, // map of field <=> hash of the clear value
     pub roles: HashMap<String, RoleDefinition>, // Can be hashed and compared with the value above
     pub validation_tokens: Vec<Proof>,
@@ -82,33 +81,15 @@ pub struct CommitMessage {
 }
 
 impl CommitMessage {
-    /// Create a new commitment message for the first transaction of the chain
-    /// init_tx must be the hex string of the transaction
-    /// validation_tokens must be empty
-    pub fn new_first_commitment(
-        transaction: Transaction,
-        pcd_commitment: Value,
-        roles: HashMap<String, RoleDefinition>,
-    ) -> Self {
-        Self {
-            init_tx: serialize(&transaction).to_lower_hex_string(),
-            pcd_commitment,
-            roles,
-            validation_tokens: vec![],
-            error: None,
-        }
-    }
-
-    /// Create a new commitment message for an update transaction
-    /// init_tx must be the hex string of the txid of the first commitment transaction
+    /// Create a new commitment message for a creation/update transaction
     /// validation_tokens must be empty
     pub fn new_update_commitment(
-        init_tx: OutPoint,
+        process_id: OutPoint,
         pcd_commitment: Value,
         roles: HashMap<String, RoleDefinition>,
     ) -> Self {
         Self {
-            init_tx: init_tx.to_string(),
+            process_id,
             pcd_commitment,
             roles,
             validation_tokens: vec![],