Flutter OpenSea数据交互插件opensea_dart的使用

Flutter OpenSea数据交互插件opensea_dart的使用

OpenSea Dart Wrapper用于Dart和Flutter应用

什么是未完成的

未实现的功能是测试网（testnet）。

快速示例

依赖项

dependencies:
  opensea_dart: ^0.0.2

示例代码

import 'package:opensea_dart/enums/enums.dart';
import 'package:opensea_dart/opensea_dart.dart';

void main() async {
  String? apiKey = "Put you api key here, or pass null to use without apikey";
  final openSea = OpenSea(apiKey);

  /// 获取订单 (需要设置apiKey)
  openSea.getOrders(side: OrderSide.buy, limit: "1").then((value) => print(value));
  await Future.delayed(const Duration(seconds: 5));

  /// 获取事件 (需要设置apiKey)
  openSea.getEvents(limit: "1").then((value) => print(value));
  await Future.delayed(const Duration(seconds: 5));

  /// 获取集合统计数据
  openSea.getCollectionStats(slug: "copypasteearth").then((value) => print(value));
  await Future.delayed(const Duration(seconds: 5));

  /// 获取合约
  openSea.getContract(assetContractAddress: "0xb47e3cd837ddf8e4c57f05d70ab865de6e193bbb").then((value) => print(value));
  await Future.delayed(const Duration(seconds: 5));

  /// 获取资产
  openSea.getAsset(
    assetContractAddress: "0xb47e3cd837ddf8e4c57f05d70ab865de6e193bbb",
    tokenId: "1",
    accountAddress: "0xb88f61e6fbda83fbfffabe364112137480398018"
  ).then((value) => print(value));
  await Future.delayed(const Duration(seconds: 5));

  /// 获取捆绑包
  openSea.getBundles(tokenIds: ["1", "209"], limit: "1").then((value) => print(value));
  await Future.delayed(const Duration(seconds: 5));

  /// 获取集合列表
  openSea.getCollections(limit: "1", offset: "5").then((value) => print(value));
  await Future.delayed(const Duration(seconds: 5));

  /// 获取集合
  openSea.getCollection("copypasteearth").then((value) => print(value));
  await Future.delayed(const Duration(seconds: 5));

  /// 获取资产列表
  openSea.getAssets(
    orderBy: OrderBy.saleDate,
    orderDirection: OrderDirection.asc,
    limit: "1",
    offset: "0",
    collection: "doodles-official"
  ).then((value) => print(value));
}

方法签名

Future<OrdersObject> getOrders({
  String? assetContractAddress,
  String? paymentTokenAddress,
  String? maker,
  String? taker,
  String? owner,
  bool? isEnglish,
  bool? bundled,
  bool? includeBundled,
  DateTime? listedAfter,
  DateTime? listedBefore,
  String? tokenId,
  List<String>? tokenIds,
  String? side,
  String? saleKind,
  String? limit,
  String? offset,
  String? orderBy,
  String? orderDirection
}) async;

Future<EventObject> getEvents({
  String? assetContractAddress,
  String? collectionSlug,
  String? tokenId,
  String? accountAddress,
  String? eventType,
  bool? onlyOpenSea = false,
  String? auctionType,
  String? limit,
  String? offset,
  DateTime? occurredBefore,
  DateTime? occurredAfter
}) async;

Future<BundlesObject> getBundles({
  bool? onSale,
  String? owner,
  String? assetContractAddress,
  List<String>? assetContractAddresses,
  List<String>? tokenIds,
  String? limit,
  String? offset
}) async;

Future<CollectionListObject> getCollections({
  String? assetOwner,
  String? offset,
  String? limit
}) async;

Future<CollectionObject> getCollection(String collection) async;

Future<AssetsObject> getAssets({
  String? owner,
  List<String>? tokenIds,
  String? assetContractAddress,
  List<String>? assetContractAddresses,
  String? orderBy,
  String? orderDirection,
  String? offset,
  String? limit,
  String? collection
}) async;

Future<SingleAssetObject> getAsset({
  required String assetContractAddress,
  required String tokenId,
  String? accountAddress
}) async;

Future<ContractObject> getContract({
  required String assetContractAddress
}) async;

Future<Stats> getCollectionStats({
  required String slug
}) async;

更多关于Flutter OpenSea数据交互插件opensea_dart的使用的实战教程也可以访问 https://www.itying.com/category-92-b0.html

1 回复

更多关于Flutter OpenSea数据交互插件opensea_dart的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html


当然，以下是一个关于如何在Flutter中使用opensea_dart插件进行数据交互的示例代码。这个插件允许你与OpenSea的API进行交互，获取NFT的市场数据。

首先，你需要在你的Flutter项目中添加opensea_dart依赖。在你的pubspec.yaml文件中添加以下依赖：

dependencies:
  flutter:
    sdk: flutter
  opensea_dart: ^最新版本号  # 请替换为实际的最新版本号

然后运行flutter pub get来安装依赖。

接下来，你需要编写一些Dart代码来使用这个插件。以下是一个简单的示例，展示如何获取一个NFT的详细信息：

import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
import 'package:opensea_dart/opensea_dart.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String nftData = '';

  @override
  void initState() {
    super.initState();
    fetchNFTData();
  }

  void fetchNFTData() async {
    // 设置OpenSea API的密钥（这里需要你在OpenSea开发者平台上注册并获取一个API密钥）
    String apiKey = '你的OpenSea API密钥';

    // 实例化OpenSeaClient
    OpenSeaClient client = OpenSeaClient(apiKey: apiKey, httpClient: http.Client());

    // 获取NFT的详细信息（这里以示例NFT的ID为例）
    try {
      Asset asset = await client.getAssetByTokenId('0x495f9472770bf147297301366a6d30e4b6d2d85a', '1');
      setState(() {
        nftData = asset.toJson().toString();
      });
    } catch (e) {
      print('Error fetching NFT data: $e');
      setState(() {
        nftData = 'Error fetching NFT data';
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('OpenSea Data Interaction'),
        ),
        body: Center(
          child: Text(nftData),
        ),
      ),
    );
  }
}

在这个示例中，我们做了以下几件事：

  1. 在pubspec.yaml文件中添加了opensea_dart依赖。
  2. 创建了一个Flutter应用，并在MyApp组件的initState方法中调用了fetchNFTData函数。
  3. 在fetchNFTData函数中，我们实例化了OpenSeaClient，并使用它来获取指定NFT的详细信息。
  4. 将获取到的NFT数据转换为JSON字符串并显示在屏幕上。

请注意，你需要将'你的OpenSea API密钥'替换为你从OpenSea开发者平台获取的实际API密钥，并且'0x495f9472770bf147297301366a6d30e4b6d2d85a'和'1'应该替换为你想要查询的实际NFT的合约地址和token ID。

此外，opensea_dart插件的具体用法可能会随着版本的更新而有所变化，因此请参考插件的官方文档以获取最新的使用指南和API参考。

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