diff --git a/web3toolkit/.env.example b/web3toolkit/.env.example
index af2faba..427bb3a 100644
--- a/web3toolkit/.env.example
+++ b/web3toolkit/.env.example
@@ -6,9 +6,7 @@
 LOG_LEVEL=info
 
 PROVIDER_TYPE=
-
 PROVIDER_URL= 
-
 BLOCK_NUMBER=
 
 
@@ -21,7 +19,6 @@ BLOCK_NUMBER=
 
 
 PAIR_ADDRESSES=
-
 ABI_JSON_PATH=
 
 
@@ -43,7 +40,15 @@ TRANSACTION=
 ############################# 
 
 START_BLOCK=
-
 TX_FILE=
 
 
+##############################
+# decode_calldata.py
+############################# 
+
+
+CONTRACT_ADDRESS=
+ABI=
+CALLDATA=
+