![]() ![]() Flutter Guide is not responsible for any mistake you make with your crypto/coding endeavors. Important: Only connect your account with apps you trust. Thank you for reading! Leave a clap if you enjoyed it and let us know in the comments if you want more tutorials like this. Flutter is a framework for building cross-platform applications that uses the Dart programming language. Perfect! Now you have successfully finished the first step in creating an application for Web3. After clicking through the steps you should get a connected message on your app :) It should open up a pop-up dialog asking you to connect with one of your accounts. Launch it using the browser you have MetaMask on and you should get something like this: This should spawn a server on your local host at some port. Unfortunately, MetaMask does not work on debug mode so run your Flutter app using this command: Message = 'Please use a Web3 supported browser.' ![]() This basically uses ChangeNotifierProvider to update the UI based on the connection with MetaMask. Now copy this simple UI so you can test it. Make sure to also create a reset function that will reset the current address and the current chain.Īnd let’s finish off the provider by writing a start function that will be responsible for resetting everything if there is any change in the account or chain. We’ll also save the chain we are operating in and call change notifier to update the UI accordingly. If there is an account we will get it and save it to our current address variable. Our connect function will request the MetaMask account via the ethereum global object that the library flutter_web3 provides. We will be testing it out on the Rinkeby test network which is represented by the number 4 on the operating chain. The provider should extend ChangeNotifier so we can update the changes accordingly in the UI. Now, let’s create a MetaMask provider which will be responsible for connecting and holding its current state.Ĭreate a file called metamask_provider.dart We’ll be using flutter_web3 to connect to a chain and provider for state management. To start, create a new Flutter project and add these dependencies to your pubspec.yaml file: flutter_web3: ^2.1.6 provider: ^6.0.0 On your wallet make sure you change to that network on the top right. We will be using the testing network: Rinkeby. Inspired by this YouTube video and the example on this package.įirst, make sure you have installed and created an account with MetaMask. Today, I prepared this quick tutorial where I will show you how you can connect your Flutter web app with Web3 via MetaMask. With the rise of decentralized applications, I often get asked on my Instagram if Flutter is suitable for developing on the Web3. ![]()
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