From e979d42a603c53c890bf6877a1ce77152922d1fc Mon Sep 17 00:00:00 2001
From: Liam Aharon <liam.aharon@hotmail.com>
Date: Thu, 22 May 2025 00:32:34 +0300
Subject: [PATCH 1/2] max depth limit 100

---
 runtime/src/lib.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/runtime/src/lib.rs b/runtime/src/lib.rs
index 56b1d1926..2079ce0ba 100644
--- a/runtime/src/lib.rs
+++ b/runtime/src/lib.rs
@@ -1596,6 +1596,14 @@ impl_runtime_apis! {
             tx: <Block as BlockT>::Extrinsic,
             block_hash: <Block as BlockT>::Hash,
         ) -> TransactionValidity {
+            use codec::DecodeLimit;
+            use frame_support::pallet_prelude::ValidateUnsigned;
+            use frame_support::traits::ExtrinsicCall;
+            let encoded = tx.call().encode();
+            if let Err(e) = <Runtime as ValidateUnsigned>::Call::decode_all_with_depth_limit(100, &mut encoded.as_slice()) {
+                log::warn!("Failed to decode call: {:?}", e);
+                todo!("handle err");
+            }
             Executive::validate_transaction(source, tx, block_hash)
         }
     }

From 6a25f28a033f903ba71bb67facc2aa2e7b304695 Mon Sep 17 00:00:00 2001
From: Liam Aharon <liam.aharon@hotmail.com>
Date: Thu, 22 May 2025 00:37:06 +0300
Subject: [PATCH 2/2] clean invalid tx handling

---
 runtime/src/lib.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/runtime/src/lib.rs b/runtime/src/lib.rs
index 2079ce0ba..c4a71e947 100644
--- a/runtime/src/lib.rs
+++ b/runtime/src/lib.rs
@@ -12,6 +12,7 @@ pub mod check_nonce;
 mod migrations;
 
 use codec::{Compact, Decode, Encode};
+use frame_support::pallet_prelude::InvalidTransaction;
 use frame_support::traits::{Imbalance, InsideBoth};
 use frame_support::{
     dispatch::DispatchResultWithPostInfo,
@@ -1602,7 +1603,7 @@ impl_runtime_apis! {
             let encoded = tx.call().encode();
             if let Err(e) = <Runtime as ValidateUnsigned>::Call::decode_all_with_depth_limit(100, &mut encoded.as_slice()) {
                 log::warn!("Failed to decode call: {:?}", e);
-                todo!("handle err");
+                return Err(TransactionValidityError::Invalid(InvalidTransaction::Call));
             }
             Executive::validate_transaction(source, tx, block_hash)
         }