fix(script): safely derive filename from calldata (#11291)

Update sequence.rs

Author: fifalodm

crates/script-sequence/src/sequence.rs

@@ -228,9 +228,13 @@ pub fn sig_to_file_name(sig: &str) -> String {
         return name.to_string();
     }
     // assume calldata if `sig` is hex
-    if let Ok(calldata) = hex::decode(sig) {
-        // in which case we return the function signature
-        return hex::encode(&calldata[..SELECTOR_LEN]);
+    if let Ok(calldata) = hex::decode(sig.strip_prefix("0x").unwrap_or(sig)) {
+        // in which case we return the function selector if available
+        if let Some(selector) = calldata.get(..SELECTOR_LEN) {
+            return hex::encode(selector);
+        }
+        // fallback to original string if calldata is too short to contain selector
+        return sig.to_string();
     }
 
     // return sig as is
@@ -255,5 +259,20 @@ mod tests {
             .as_str(),
             "522bb704"
         );
+        // valid calldata with 0x prefix
+        assert_eq!(
+            sig_to_file_name(
+                "0x522bb704000000000000000000000000f39fd6e51aad88f6f4ce6ab8827279cfFFb92266"
+            )
+            .as_str(),
+            "522bb704"
+        );
+        // short calldata: should not panic and should return input as-is
+        assert_eq!(sig_to_file_name("0x1234").as_str(), "0x1234");
+        assert_eq!(sig_to_file_name("123").as_str(), "123");
+        // invalid hex: should return input as-is
+        assert_eq!(sig_to_file_name("0xnotahex").as_str(), "0xnotahex");
+        // non-hex non-signature: should return input as-is
+        assert_eq!(sig_to_file_name("not_a_sig_or_hex").as_str(), "not_a_sig_or_hex");
     }
 }