send_mint_transaction_with_walletconnect(using flutter)

send_mint_transaction.dart

import 'package:qr_flutter/qr_flutter.dart';
import 'package:flutter/gestures.dart';
import 'package:url_launcher/url_launcher.dart';
import 'package:walletconnect_dart/walletconnect_dart.dart';
import 'package:web3dart/web3dart.dart';
import 'package:http/http.dart';

// please add widget logic

Future<void> _build_wallet_connect(BuildContext context, String tokenUrl) async {
    late String account;
    late SessionStatus session;
    
    final String your_contract_address = 'xxxxx';
    final String your_infra_url = 'https://yyyyy';
    
    // Create a connector
    final connector = WalletConnect(
      bridge: 'https://bridge.walletconnect.org',
      clientMeta: PeerMeta(
        name: 'WalletConnect',
        description: 'WalletConnect Developer App',
        url: 'https://walletconnect.org',
        icons: [
          'https://gblobscdn.gitbook.com/spaces%2F-LJJeCjcLrr53DcT1Ml7%2Favatar.png?alt=media'
        ],
      ),
    );

    if (!connector.connected) {
      session = await connector.createSession(
        // this is polygon mumbai chainid
        chainId: 80001,
        onDisplayUri: (uri) async {
          setState(() {
            _url = uri;
          });
        }
      );
    }

    setState(() {
      account = session.accounts[0];
    });

    final contractAddr = EthereumAddress.fromHex(your_contract_address);
    final client = Web3Client(your_infra_url, Client());
    EthereumWalletConnectProvider provider = EthereumWalletConnectProvider(connector);
    final userAddress = EthereumAddress.fromHex(account);
    final credentials = WalletConnectEthereumCredentials(provider: provider);
    String abiCode = await rootBundle.loadString('json/abi.json');
    final contract = DeployedContract(ContractAbi.fromJson(abiCode, 'Your Contract Name'), contractAddr);
    final mint_function = contract.function('xxxxxx');
    await client.sendTransaction(
      credentials,
      Transaction.callContract(
        contract: contract,
        function: mint_function,
        parameters: [userAddress, tokenUrl],
        from: userAddress,
        nonce: await client.getTransactionCount(userAddress,atBlock: BlockNum.pending()),
      ),
    );
    connector.killSession();
  }