fix(verified sources fetcher): Use correct contact_name for `SolSin…

…gleFile` (#1433)

## What ❔

Use correct `contact_name` for `SolSingleFile `

## Why ❔

Fix panic in verified sources fetcher.

## Checklist

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- [ ] PR title corresponds to the body of PR (we generate changelog
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- [ ] Tests for the changes have been added / updated.
- [ ] Documentation comments have been added / updated.
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core/bin/verified_sources_fetcher/src/main.rs

@@ -33,9 +33,16 @@ async fn main() {
 
         match req.req.source_code_data {
             SourceCodeData::SolSingleFile(content) => {
+                let contact_name = if let Some((_file_name, contract_name)) =
+                    req.req.contract_name.rsplit_once(':')
+                {
+                    contract_name.to_string()
+                } else {
+                    req.req.contract_name.clone()
+                };
+
                 let mut file =
-                    std::fs::File::create(format!("{}/{}.sol", &dir, req.req.contract_name))
-                        .unwrap();
+                    std::fs::File::create(format!("{}/{}.sol", &dir, contact_name)).unwrap();
                 file.write_all(content.as_bytes()).unwrap();
             }
             SourceCodeData::YulSingleFile(content) => {