import 'dart:convert'; import 'package:http/http.dart'; const blockchainInfoBaseURI = 'https://blockchain.info'; const multiAddressURI = '$blockchainInfoBaseURI/multiaddr'; Future<List<String>> fetchAllAddresses({String xpub}) async { final uri = '$multiAddressURI?active=$xpub'; final response = await get(uri); final responseJSON = json.decode(response.body) as Map<String, dynamic>; print(responseJSON); return (responseJSON['addresses'] as List<dynamic>).map((dynamic row) { if (row is Map<String, Object>) { return row['address'] as String; } return ''; }).toList(); }