Smart contract related functions to call MetaCoin example

meta_coin.dart

Future<String> sendCoind(String targetAddressHex, int amount) async {
    EthereumAddress address = EthereumAddress.fromHex(targetAddressHex);
    // uint in smart contract means BigInt for us
    var bigAmount = BigInt.from(amount);
    // sendCoin transaction
    var response = await submit("sendCoin", [address, bigAmount]);
    // hash of the transaction
    return response;
  }

  Future<List<dynamic>> getBalance(String targetAddressHex) async {
    EthereumAddress address = EthereumAddress.fromHex(targetAddressHex);
   // getBalance transaction
    List<dynamic> result = await query("getBalance", [address]);
   // returns list of results, in this case a list with only the balance
    return result;
  }