private (set) var

Results 2 issues of private (set) var

- **OpenEthereum version**: 3.0.0 - **Operating system**: Linux - **Installation**: built from source - **Fully synchronized**: yes - **Network**: ropsten - **Restarted**: yes Unable to async when chain mode is...

A3-stale 🍃

When only call mint(_to, _amount) use BSC Studio, throw error. ![image](https://user-images.githubusercontent.com/22029390/139564697-ada94f99-3aba-4a0c-8dc1-20d69c71d4bb.png) Other funs is call successful. ![image](https://user-images.githubusercontent.com/22029390/139564768-e640fb37-040a-4b58-93b6-21fe55fe4b34.png) When using Remix IDE, mint(_to, _amount) is call ok. ![image](https://user-images.githubusercontent.com/22029390/139564716-f229c216-8bcc-4da0-8a1a-ff1fbf1b550c.png) it's a BSC...