getTokenSymbol method

Implementation

@override
Future<String> getTokenSymbol() async {
  var contract = DeployedContract(
      ContractAbi.fromJson(abiJson, 'blToken'),
      EthereumAddress.fromHex(blTokenContract)
  );
  final function = contract.function('symbol');
  final result = await _client.call(
      contract: contract,
      function: function,
      params: []
  );

  return result.first as String;
}