diff --git a/src/billing_job.rs b/src/billing_job.rs
index bb560bb..7c12e1f 100644
--- a/src/billing_job.rs
+++ b/src/billing_job.rs
@@ -5,7 +5,7 @@ use crate::model::AppState;
 
 use actix_web::web::Data;
 use anyhow::{anyhow, Context, Error};
-use ethers::prelude::*;
+use ethers::{abi::Token, prelude::*};
 use k256::elliptic_curve::generic_array::sequence::Lengthen;
 use tiny_keccak::{Hasher, Keccak};
 
@@ -19,9 +19,9 @@ pub async fn billing_scheduler(appstate: Data<AppState>,) -> Result<String, Erro
 
     let client = SignerMiddleware::new(provider, wallet);
     let contract = Contract::new(
-        appstate.contract.as_str()
-                    .parse::<Address>()
-                    .context("Unable to parse contract address")?, 
+        appstate.billing_contract.as_str()
+            .parse::<Address>()
+            .context("Unable to parse contract address")?, 
         appstate.abi.to_owned(), 
         Arc::new(client));
 
@@ -50,13 +50,13 @@ pub async fn billing_scheduler(appstate: Data<AppState>,) -> Result<String, Erro
     
     let tx_request = contract.method::<_, H256>(
         "settle", 
-        (tx_hashes, amounts, signature.as_bytes().to_vec()))
+        (tx_hashes, amounts, Token::Bytes(signature.into_bytes())))
         .context("failed to build transaction request for billing")?;
     let pending_tx = tx_request
         .send()
         .await
         .context("Error while sending the billing transaction")?;
-    
+
     let tx_receipt = pending_tx
         .confirmations(7)
         .await
diff --git a/src/handler.rs b/src/handler.rs
index 3fce1e3..1ab93e3 100644
--- a/src/handler.rs
+++ b/src/handler.rs
@@ -67,6 +67,7 @@ pub async fn serverless(
         workerd_runtime_path,
         &appstate.rpc,
         &appstate.contract,
+        &appstate.billing_contract,
         &appstate.abi,
     )
     .await
@@ -279,6 +280,6 @@ pub async fn serverless(
     *amount += execution_cost;
 
     appstate.billing_hasher.lock().await.update(&hash);
-    
+
     return response;
 }
diff --git a/src/main.rs b/src/main.rs
index 6da8791..ec2bddb 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -39,6 +39,9 @@ struct Args {
     )]
     contract: String,
 
+    #[clap(long, value_parser)]
+    billing_contract: String,
+
     #[clap(long, value_parser)]
     operator_wallet_key: String,
 
@@ -87,6 +90,7 @@ async fn main() -> anyhow::Result<()> {
         runtime_path: cli.runtime_path,
         rpc: cli.rpc,
         contract: cli.contract,
+        billing_contract: cli.billing_contract,
         signer: signer,
         abi: abi,
         operator_wallet_key: cli.operator_wallet_key,
diff --git a/src/model.rs b/src/model.rs
index 374607b..3198e99 100644
--- a/src/model.rs
+++ b/src/model.rs
@@ -16,6 +16,7 @@ pub struct AppState {
     pub runtime_path: String,
     pub rpc: String,
     pub contract: String,
+    pub billing_contract: String,
     pub signer: k256::ecdsa::SigningKey,
     pub abi: Abi,
     pub operator_wallet_key: String,
diff --git a/src/tests.rs b/src/tests.rs
index 390a0d0..0231aa9 100644
--- a/src/tests.rs
+++ b/src/tests.rs
@@ -40,6 +40,7 @@ pub mod serverlesstest {
                 runtime_path: "./runtime/".to_owned(),
                 rpc: "https://goerli-rollup.arbitrum.io/rpc".to_owned(),
                 contract: "0x30694a76d737211a908d0dd672f47e1d29fbfb02".to_owned(),
+                billing_contract: String::new(),                                      // TODO: ADD BILLING CONTRACT FOR TESTS
                 abi: abi,
                 signer: k256::ecdsa::SigningKey::random(&mut rand::rngs::OsRng),
                 operator_wallet_key: String::new(),                                    //TODO: ADD A WALLET KEY FOR RUNNING TESTS 
diff --git a/src/workerd.rs b/src/workerd.rs
index 45ce61c..014d0e7 100644
--- a/src/workerd.rs
+++ b/src/workerd.rs
@@ -55,15 +55,15 @@ pub enum ServerlessError {
 async fn get_current_deposit(
     tx_hash: &str, 
     rpc: &str, 
-    contract_add: &str,
+    billing_contract_add: &str,
     abi: &Abi,
 ) -> Result<U256, Error> {
     let provider = Provider::<Http>::try_from(rpc)?
         .interval(Duration::from_millis(1000));
     let contract = Contract::new(
-        contract_add.parse::<Address>()?, 
+        billing_contract_add.parse::<Address>()?, 
         abi.to_owned(), 
-        Arc::new(provider));
+        Arc::new(provider));    
 
     let mut bytes32_tx_hash = [0u8; 32];
     hex::decode_to_slice(&tx_hash[2..], &mut bytes32_tx_hash)?;  
@@ -99,16 +99,9 @@ pub async fn create_code_file(
     workerd_runtime_path: &str,
     rpc: &str,
     contract: &str,
+    billing_contract: &str,
     abi: &Abi,
 ) -> Result<(), ServerlessError> {
-    let tx_deposit = get_current_deposit(tx_hash, rpc, contract, abi)
-        .await
-        .map_err(|_| ServerlessError::TxDepositNotFound)?;
-    // TODO: FIX THE FIXED MINIMUM VALUE
-    if tx_deposit <= U256::from(200) {                                
-       return Err(ServerlessError::TxDepositNotEnough);
-    }
-
     // get tx data
     let mut tx_data = match get_transaction_data(tx_hash, rpc).await?["result"].take() {
         Value::Null => Err(ServerlessError::TxNotFound),
@@ -135,6 +128,15 @@ pub async fn create_code_file(
         _ => Err(ServerlessError::InvalidTxCalldataType),
     }?;
 
+    // get tx deposit
+    let tx_deposit = get_current_deposit(tx_hash, rpc, billing_contract, abi)
+        .await
+        .map_err(|_| ServerlessError::TxDepositNotFound)?;
+    // TODO: FIX THE FIXED MINIMUM VALUE
+    if tx_deposit <= U256::from(200) {                                
+       return Err(ServerlessError::TxDepositNotEnough);
+    }
+
     // hex decode calldata by skipping to the code bytes
     let mut calldata = hex::decode(&calldata[138..])?;