Error: EthersException: INVALID_ARGUMENT invalid ENS name

[cryptobys-rami]

Describe the bug
Calling a state changing contract function with multiple arguments (including a tuple type) ends up with an obscure ethers exception instead of triggering a metamask signature request

To Reproduce
Unzip the sample app and run on localhost

Excerpt from main.dart below:

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_web3/flutter_web3.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);
  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  Future<Contract> _getDefaultReadWriteContract() async {
    final Interface? defaultInterface = Interface(
        await rootBundle.loadString('assets/contracts/Marketplace.json'));
    return Contract(
      '0xC52d8bB5E4e3b3FDDA63412017b872E88EdE6A38',
      defaultInterface,
      provider!.getSigner(),
    );
  }

  Future<void> transactWithSignature() async {
    const String buyerWalletAddress =
        '0xE6d48d4C3e2C4A60B5E9fE0826ee49075dd08A43';
    const String sellerWalletAddress =
        '0xAcF0A764250288844aE2422986e33f802913990b';
    const String nftAddress = '0x691936177FFaa7f35f7D3a84b8C886bc363fFD6A';
    final BigNumber tokenId = BigNumber.from('3');
    final BigNumber price = BigNumber.from('1');
    final BigNumber fees = BigNumber.from('0');
    final BigNumber nonce = BigNumber.from('6594093');
    final BigNumber timestamp = BigNumber.from('43435093094');

    final Contract operatingContract = await _getDefaultReadWriteContract();

    final List<dynamic> args = <dynamic>[
      <dynamic>[
        buyerWalletAddress,
        sellerWalletAddress,
        nftAddress,
        tokenId,
        price,
        fees,
        nonce,
        timestamp,
      ],
      BigInt.from(27),
      EthUtils.solidityPack(<String>[
        'string'
      ], <dynamic>[
        '0x0671384f9f4b748c46156c0f6c3c25143e99cbac311c131456403d4c313470b7'
      ]),
      EthUtils.solidityPack(<String>[
        'string'
      ], <dynamic>[
        '0x4c773016fd49680c90a6e3d96822175768c893426187a1dd9a734a7662e9ebb8'
      ]),
    ];

    print('starting transaction');
    final TransactionResponse response = await operatingContract.send(
      'transact',
      args,
      TransactionOverride(value: price.toBigInt),
    );

    print(response.hash);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: MaterialButton(
          onPressed: transactWithSignature,
          child: const Text('Transact'),
        ),
      ),
      // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}

Expected behavior
It should request a signature from metamask

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• Browser Chrome

sampleapp.zip

[cryptobys-rami]

If you are looking to replicate please note the contract is on Ropsten (chain id 3)

[cryptobys-rami]

Hi - let me know if there is anything else you need to look into this issue. If this is a genuine bug then I would be more than happy to try to fix it with a PR. thank you in advance.

[sergiomartell]

I am facing the same problem when sending an instruction with 2 tuples as arguments. @cryptobys-rami , where you able to solve your issue?