web3_provider

Description:

web3 provider

Plugin: https://pub.dev/packages/web3_provider #
web3_provider #
The project supported send and receive messages between Dapp and in-app webview “Only EIP-1193 standard supported”
Overview #

Communicate between dapp and your app.



Dapp interact with blockchain.


Usage #
import 'package:web3_provider/web3_provider.dart';

InAppWebViewGroupOptions options = InAppWebViewGroupOptions(
crossPlatform: InAppWebViewOptions(
useShouldOverrideUrlLoading: true,
mediaPlaybackRequiresUserGesture: false,
userAgent:
"Mozilla/5.0 (Linux; Android 4.4.4; SAMSUNG-SM-N900A Build/tt) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/33.0.0.0 Mobile Safari/537.36",
),
android: AndroidInAppWebViewOptions(
useHybridComposition: true,
domStorageEnabled: true,
),
ios: IOSInAppWebViewOptions(
allowsInlineMediaPlayback: true,
),
);

/// By default config
InAppWebViewEIP1193(
chainId: 56, // Replace your chain id network you want connect
rpcUrl: 'https://bsc-dataseed.binance.org/', // Replace your rpc url network you want connect
walletAddress: walletAddress,
signCallback: (rawData, eip1193, controller) {
// Handler callback when dapp interact with blockchain
switch (eip1193) {
case EIP1193.requestAccounts:
controller?.setAddress(walletAddress, id);
print('requestAccounts');
break;
case EIP1193.signTransaction:
print('signTransaction');
break;
case EIP1193.signMessage:
print('signMessage');
break;
case EIP1193.signPersonalMessage:
print('signPersonalMessage');
break;
case EIP1193.signTypedMessage:
print('addEthereumChain');
break;
case EIP1193.addEthereumChain:
print('addEthereumChain');
break;
},
initialUrlRequest: URLRequest(
url: Uri.parse(
'https://position.exchange', // Replace your dapp domain
),
),
initialOptions: options
);
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If you want use your provider script
you provide [customPathProvider] and [customWalletName]
signCallback: (rawData, eip1193, controller): callback was called when dapp when interact with blockchain.

rawData: data received.
eip1193: type function support.

requestAccounts: Pass when web app connect wallet
signTransaction: Pass when web app approve contract or send transaction
signMessage: Pass when web app sign a message
signPersonalMessage: Pass when web app sign a personal message
signTypedMessage: Pass when web app sign a type message
addEthereumChain: Pass when web app add a new chain



When you pass data from dapp to your app
const args = {/* Pass data you want */};
if (window.flutter_inappwebview.callHandler) {
window.flutter_inappwebview.callHandler('functionName', args)
.then(function(result) {
/// Receive data from your app
});
}
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And receive in your app
onWebViewCreated: (controller) {
controller.addJavaScriptHandler(
handlerName: 'functionName',
callback: (args) {
/// Receive data from dapp


/// Send data to dapp;
return /* anything */;
},
);
},
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