https://github.com/itenfay/grab_ethtoken_info
从以太坊区块链 (Ethereum Blockchain) etherscan 上抓取任意一个钱包地址的所有token信息 (Address, Name, Balance, Symbol, Value)，并编写界面进行展示。
https://github.com/itenfay/grab_ethtoken_info
balance blockchain blockchain-technology contract contracts-programming dart dart-etherscan eth ethereum flutter flutter-app flutter-demo symbol token wallet-address
Last synced: 5 months ago
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从以太坊区块链 (Ethereum Blockchain) etherscan 上抓取任意一个钱包地址的所有token信息 (Address, Name, Balance, Symbol, Value)，并编写界面进行展示。
- Host: GitHub
- URL: https://github.com/itenfay/grab_ethtoken_info
- Owner: itenfay
- License: other
- Created: 2019-05-05T21:53:18.000Z (almost 6 years ago)
- Default Branch: master
- Last Pushed: 2024-05-14T12:56:04.000Z (12 months ago)
- Last Synced: 2024-06-07T05:53:36.649Z (11 months ago)
- Topics: balance, blockchain, blockchain-technology, contract, contracts-programming, dart, dart-etherscan, eth, ethereum, flutter, flutter-app, flutter-demo, symbol, token, wallet-address
- Language: Dart
- Homepage: https://www.jianshu.com/p/df29789b0106
- Size: 200 KB
- Stars: 19
- Watchers: 2
- Forks: 4
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
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## grab_ethtoken_info
从以太坊区块链 (Ethereum Blockchain) etherscan 上抓取任意一个钱包地址的所有token信息 (Address, Name, Balance, Symbol, Value)，并编写界面进行展示。
## Group(ID:155353383)
## Recommendation
* [Dart crypto](https://github.com/chenxing640/dart_crypto)
## Getting Started
For help getting started with Flutter, view the online
* [Flutter Hub](https://github.com/chenxing640/Awesome/blob/master/Flutter.md)
## Structure
- Network
- [http_utils](https://github.com/chenxing640/grab_ethtoken_info/blob/master/lib/network/http_utils.dart) - A HTTP tool to receive data, download and upload files, etc.
- DB
- [EthTokenholdingsProvider](https://github.com/chenxing640/grab_ethtoken_info/blob/master/lib/db/EthTokenholdingsProvider.dart)
- [EthTokensProvider](https://github.com/chenxing640/grab_ethtoken_info/blob/master/lib/db/EthTokensProvider.dart)
- Utils
- [HtmlConverter](https://github.com/chenxing640/grab_ethtoken_info/blob/master/lib/eth_token_grab/HtmlConverter.dart) - Converts a paragraph of HTML text into simple standard html.
- [ExtendedUtility](https://github.com/chenxing640/grab_ethtoken_info/blob/master/lib/eth_token_grab/ExtendedUtility.dart) - Extended Utilities.
- ETH Token
- [AppConfigurator](https://github.com/chenxing640/grab_ethtoken_info/blob/master/lib/eth_token_grab/AppConfigurator.dart)
- [EthTokensDisplay](https://github.com/chenxing640/grab_ethtoken_info/blob/master/lib/eth_token_grab/EthTokensDisplay.dart) - Display UI for tokens.
- [EthAddNewTokens](https://github.com/chenxing640/grab_ethtoken_info/blob/master/lib/eth_token_grab/EthAddNewTokens.dart) - Display UI for Adding new tokens.
- [EthTokenholdingsDataRequest](https://github.com/chenxing640/grab_ethtoken_info/blob/master/lib/eth_token_grab/EthTokenholdingsDataRequest.dart) - Get data from tokenholdings service.
- [EthTokenholdingsModel](https://github.com/chenxing640/grab_ethtoken_info/blob/master/lib/eth_token_grab/EthTokenholdingsModel.dart) - A model for the token holdings.
- [EthTokenholdingsParser](https://github.com/chenxing640/grab_ethtoken_info/blob/master/lib/eth_token_grab/EthTokenholdingsParser.dart) - Parsing data that comes from tokenholdings service.
- [EthTokenModel](https://github.com/chenxing640/grab_ethtoken_info/blob/master/lib/eth_token_grab/EthTokenModel.dart)
- [EthTokenParser](https://github.com/chenxing640/grab_ethtoken_info/blob/master/lib/eth_token_grab/EthTokenParser.dart)
## Display UI
- Import Dart Files.
```dart
import './network/http_utils.dart';
import './eth_token_grab/EthTokensDisplay.dart';
import './eth_token_grab/EthTokenParser.dart';
import './db/EthTokensProvider.dart';
import './db/EthTokenholdingsProvider.dart';
import './eth_token_grab/EthTokenholdingsDataRequest.dart';
import './eth_token_grab/EthTokenholdingsParser.dart';
import './eth_token_grab/AppConfigurator.dart';
```
- Open Databases.
```dart
void openTokenholdingsDB() async {
EthTokenholdingsProvider.shared.open().then((isOpen){
print("EthTokenholdingsProvider isOpen: $isOpen");
});
}
void openTokensDB() async {
EthTokensProvider.shared.open().then((isOpen) {
print("EthTokensProvider isOpen: $isOpen");
});
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
openTokenholdingsDB();
openTokensDB();
return new MaterialApp(
title: 'Flutter Demo',
debugShowCheckedModeBanner: false,
theme: new ThemeData(
primarySwatch: Colors.blue,
),
home: new MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
```
- Fetcth data, Create page route and Display the information of all tokens.
```dart
class _MyHomePageState extends State {
int _counter = 0;
String _data = "";
// Fetch token data.
void _getTokenData() {
var baseUrl = "https://etherscan.io";
var httpUtils = new HttpUtils.config(baseUrl: baseUrl);
httpUtils.connectTimeout = 10;
httpUtils.get("/address/0x71c7656ec7ab88b098defb751b7401b5f6d8976f");
print("url: ${httpUtils.url}");
httpUtils.listen((Response response) {
String data = response.data;
//print("data: $data");
setState(() {
_data = data;
});
}, (DioError error) {
print("e: ${error.message}");
});
}
// Fetch token holdings data.
void _getTokenholdingsData() async {
String a = "0x71c7656ec7ab88b098defb751b7401b5f6d8976f";
String data = await EthTokenholdingsDataRequest.init(a).getData();
if (data != null && data.isNotEmpty) {
EthTokenholdingsParser.parse(data, a);
}
}
@override
void initState() {
super.initState();
_getTokenData();
_getTokenholdingsData();
}
void _incrementCounter() {
setState(() {
// This call to setState tells the Flutter framework that something has
// changed in this State, which causes it to rerun the build method below
// so that the display can reflect the updated values. If we changed
// _counter without calling setState(), then the build method would not be
// called again, and so nothing would appear to happen.
_counter++;
});
if (_data.isNotEmpty) {
EthTokenParser.parse(_data).then((finished){
if (finished) {
Navigator.push(context, _createPushRoute());
}
});
} else {
print("data is empty.");
}
}
// Create page route for displaying the information of all of tokens.
// This is simple demo for testing, the codes maybe include some bugs.
MaterialPageRoute _createPushRoute() {
return MaterialPageRoute(builder: (context) =>
new EthTokensDisplayView("0x71c7656ec7ab88b098defb751b7401b5f6d8976f")
);
}
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppConfigurator('UI').createAppBar(
title: new Text(widget.title, style: new TextStyle(fontSize: 18.0),)
),
body: new Center(
// Center is a layout widget. It takes a single child and positions it
// in the middle of the parent.
child: new Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
new Text(
'You have pushed the button this many times:',
),
new Text(
'$_counter',
style: Theme.of(context).textTheme.display1,
),
],
),
),
floatingActionButton: new FloatingActionButton(
nPressed: _incrementCounter,
tooltip: 'Increment',
child: new Icon(Icons.add),
), // This trailing comma makes auto-formatting nicer for build methods.
);
}
}
````
## Feedback is welcome
If you notice any issue, please create an issue. I will be happy to help you.