fix get_sorted_events bug

src/execution/mod.rs

@@ -116,7 +116,7 @@ impl CallInfo {
         calls
     }
 
-    /// Returns a list of StarkNet Event objects collected during the execution, sorted by the order
+    /// Returns a list of Starknet Event objects collected during the execution, sorted by the order
     /// in which they were emitted.
     pub fn get_sorted_events(&self) -> Result<Vec<Event>, TransactionError> {
         let calls = self.gen_call_topology();
@@ -127,8 +127,11 @@ impl CallInfo {
         for call in calls {
             for ordered_event in call.events {
                 let event = Event::new(ordered_event.clone(), call.contract_address.clone());
-                starknet_events.remove(ordered_event.order as usize - 1);
-                starknet_events.insert(ordered_event.order as usize - 1, Some(event));
+                starknet_events.remove((ordered_event.order as isize - 1).max(0) as usize);
+                starknet_events.insert(
+                    (ordered_event.order as isize - 1).max(0) as usize,
+                    Some(event),
+                );
             }
         }
 
@@ -140,7 +143,7 @@ impl CallInfo {
         Ok(starknet_events.into_iter().flatten().collect())
     }
 
-    /// Returns a list of StarkNet L2ToL1MessageInfo objects collected during the execution, sorted
+    /// Returns a list of Starknet L2ToL1MessageInfo objects collected during the execution, sorted
     /// by the order in which they were sent.
     pub fn get_sorted_l2_to_l1_messages(&self) -> Result<Vec<L2toL1MessageInfo>, TransactionError> {
         let calls = self.gen_call_topology();
@@ -613,6 +616,26 @@ mod tests {
     use super::*;
     use crate::utils::{string_to_hash, Address};
 
+    #[test]
+    fn test_get_sorted_single_event() {
+        let address = Address(Felt252::zero());
+        let ordered_event = OrderedEvent::new(0, vec![], vec![]);
+        let event = Event::new(ordered_event.clone(), address.clone());
+        let internal_calls = vec![CallInfo {
+            events: vec![ordered_event],
+            ..Default::default()
+        }];
+        let call_info = CallInfo {
+            contract_address: address,
+            internal_calls,
+            ..Default::default()
+        };
+
+        let sorted_events = call_info.get_sorted_events().unwrap();
+
+        assert_eq!(sorted_events, vec![event]);
+    }
+
     #[test]
     fn non_optional_calls_test() {
         let mut tx_info = TransactionExecutionInfo {