message: correct type of NetworkSymbol in Layer2Chain
diff: @@ -138,7 +138,7 @@ export default abstract class Layer2ChainWeb3Strategy
  private getTokenContractInfo(
  symbol: ConvertibleSymbol,
  - network: NetworkSymbol
  + network: Layer2NetworkSymbol
  ): TokenContractInfo {
  return new TokenContractInfo(symbol, network);
  }
  