fix: clear stale callback after execution

contracts/executor.sol

@@ -258,6 +258,8 @@ contract executor {
 
             }
         }
+
+        callbackAddress = address(0);
     }
 
     /**

src/lib.rs

@@ -6,9 +6,11 @@ pub const EXECUTOR_INIT: &[u8] = include_bytes!(concat!(env!("OUT_DIR"), "/execu
 #[cfg(not(docsrs))]
 pub const DELEGATE_PROXY_INIT: &[u8] = include_bytes!(concat!(env!("OUT_DIR"), "/proxy.bin"));
 #[cfg(not(docsrs))]
-pub const EXECUTOR_RUNTIME: &[u8] = include_bytes!(concat!(env!("OUT_DIR"), "/executor_runtime.bin"));
+pub const EXECUTOR_RUNTIME: &[u8] =
+    include_bytes!(concat!(env!("OUT_DIR"), "/executor_runtime.bin"));
 #[cfg(not(docsrs))]
-pub const DELEGATE_PROXY_RUNTIME: &[u8] = include_bytes!(concat!(env!("OUT_DIR"), "/proxy_runtime.bin"));
+pub const DELEGATE_PROXY_RUNTIME: &[u8] =
+    include_bytes!(concat!(env!("OUT_DIR"), "/proxy_runtime.bin"));
 
 // Use empty slices when building on docs.rs
 #[cfg(docsrs)]
@@ -20,7 +22,6 @@ pub const EXECUTOR_RUNTIME: &[u8] = &[];
 #[cfg(docsrs)]
 pub const DELEGATE_PROXY_RUNTIME: &[u8] = &[];
 
-
 pub mod flow_builder;
 pub mod opcodes;
 

src/test.rs

@@ -273,6 +273,37 @@ async fn test_wallet_can_interact() {
     assert_eq!(account_balance, BUDGET); // executor has the money sent in empty tx
 }
 
+#[tokio::test]
+async fn test_execute_actions_clears_unprocessed_callback() {
+    let provider = ProviderBuilder::new().connect_anvil();
+    provider
+        .anvil_set_balance(WALLET, BUDGET + U256::from(10u64.pow(18)))
+        .await
+        .unwrap();
+
+    let executor = deploy_executor(&provider).await;
+    let fb = FlowBuilder::empty().set_callback(BOB).build();
+    let tx = TransactionRequest::default()
+        .with_from(WALLET)
+        .with_to(executor)
+        .with_input(fb);
+
+    let tx_hash = provider.eth_send_unsigned_transaction(tx).await.unwrap();
+    provider.evm_mine(None).await.unwrap();
+    let receipt = provider
+        .get_transaction_receipt(tx_hash)
+        .await
+        .unwrap()
+        .unwrap();
+    assert!(receipt.status());
+
+    let callback_slot = provider
+        .get_storage_at(executor, U256::from(1))
+        .await
+        .unwrap();
+    assert_eq!(callback_slot, U256::ZERO);
+}
+
 #[tokio::test]
 async fn test_weth_deposit_through_executor() {
     let provider = setup_provider().await;