如何使用Metamask进行交易？

Question

import 'package:http/http.dart'; //You can also import the browser version
import 'package:web3dart/web3dart.dart';

var apiUrl = "http://localhost:7545"; //Replace with your API

var httpClient = Client();
var ethClient = Web3Client(apiUrl, httpClient);

var credentials = ethClient.credentialsFromPrivateKey("0x...");

// You can now call rpc methods. This one will query the amount of Ether you own
EtherAmount balance = ethClient.getBalance(credentials.address);
print(balance.getValueInUnit(EtherUnit.ether));

这是web3dart包中的代码。我想用Metamask移动应用程序本身的一些url替换apiUrl (通过walletConnect包连接)。有帮手吗？

Answer 1

您可以使用此方法连接到rpc最终凭据=EthPrivateKey.fromHex(私钥)；因为另一个是不推荐的。

print("Accediendo al servidor blockchain...");

  var rpcUrl = "HTTP://127.0.0.1:8545";
  const String privatekey = "2812d889332dce9256c385355839102910ae8cc1c16c6e1212174d1dc91d9738";
  
  final client = Web3Client(rpcUrl, Client());

  final credentials = EthPrivateKey.fromHex(privatekey);
  final address = credentials.address;
  print(address.hexEip55);

Answer 2

使用此包进行颤振。链接：https://pub.dev/packages/web3dart

var apiUrl = "http://localhost:7545"; //Replace with your API

var httpClient = new Client();
var ethClient = Web3Client(apiUrl, httpClient);

EthPrivateKey credentials = await ethClient.credentialsFromPrivateKey("0x...........");

EthereumAddress address=credentials.address;
print("ADDRESS FORM PRIVATE KEY : "+address.hex);