diff --git a/core/lib/config/src/configs/tx_sink.rs b/core/lib/config/src/configs/tx_sink.rs
index 2d3b981aa..eede9f842 100644
--- a/core/lib/config/src/configs/tx_sink.rs
+++ b/core/lib/config/src/configs/tx_sink.rs
@@ -10,6 +10,14 @@ pub struct TxSinkConfig {
 
 impl TxSinkConfig {
     pub fn deny_list(&self) -> Option<HashSet<Address>> {
+        // Return deny list is not set or empty
+        if self.deny_list.is_none() || self.deny_list.as_ref().unwrap().is_empty() {
+            return None;
+        }
+
+        // Parse deny list from a string and return it as a set of addresses
+        // Example: "0x1,0x2,0x3" -> { Address::from_str("0x1").unwrap(), Address::from_str("0x2").unwrap(), Address::from_str("0x3").unwrap() }
+        // Note: This assumes that the addresses are separated by commas and are in valid format.
         self.deny_list.as_ref().map(|list| {
             list.split(',')
                 .map(|element| Address::from_str(element).unwrap())
diff --git a/etc/env/file_based/general.yaml b/etc/env/file_based/general.yaml
index 62c264a37..3794e3b36 100644
--- a/etc/env/file_based/general.yaml
+++ b/etc/env/file_based/general.yaml
@@ -104,6 +104,7 @@ eth:
     max_aggregated_tx_gas: 15000000
     max_acceptable_priority_fee_in_gwei: 100000000000 # typo: value is in wei (100 gwei)
     pubdata_sending_mode: BLOBS
+    signing_mode: PRIVATE_KEY
   gas_adjuster:
     default_priority_fee_per_gas: 1000000000
     max_base_fee_samples: 100
@@ -383,3 +384,5 @@ consensus:
   public_addr: "127.0.0.1:3054"
   max_payload_size: 2500000
   gossip_dynamic_inbound_limit: 100
+tx_sink:
+  deny_list: ""