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Solution: Crypto API

Explore how to connect your Flutter app to a Crypto API by implementing HTTP GET requests and handling asynchronous data with FutureBuilder. Learn to display live data, manage loading states, and handle errors effectively to create a responsive user experience.

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Solutions

Great job on completing all the steps in the previous challenge! Feel free to compare your code solutions with the solutions below:

lib/utilities/coins_service.dart
lib/presentation/coins_screen.dart
import 'dart:convert';
import 'package:http/http.dart';
class CoinsService{
  static final CoinsService _singleton =  CoinsService._internal();
  CoinsService._internal();
  static CoinsService get instance => _singleton;
  final _baseURL = 'https://44a3d77f-08c1-4a76-8073-52e7d46c888b.mock.pstmn.io/';
  Future<List<dynamic>> getCoins()async{
    const coinsEndpoint = '/coins/markets';
    Response res = await get(Uri.parse(_baseURL + coinsEndpoint));
    if (res.statusCode == 200) {
      var body = jsonDecode(res.body);
      return body;
    } else {
      throw "Unable to retrieve coins";
    }
  }
}
Crypto API solution code

Challenge 1: Get

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