message: layer2 chain: clear balances when clearing wallet info
diff: @@ -160,6 +160,8 @@ export default abstract class Layer2ChainWeb3Strategy
  this.waitForAccountDeferred.resolve();
  });
  } else {
  + this.defaultTokenBalance = new BN('0');
  + this.cardBalance = new BN('0');
  this.waitForAccountDeferred = defer();
  }
  }
  