stack_wallet/lib/services/litescribe_api.dart
2023-09-08 15:09:59 -06:00

86 lines
3.1 KiB
Dart

import 'dart:convert';
import 'package:stackwallet/dto/ordinals/inscription_data.dart';
import 'package:stackwallet/dto/ordinals/litescribe_response.dart';
import 'package:stackwallet/networking/http.dart';
import 'package:stackwallet/services/tor_service.dart';
import 'package:stackwallet/utilities/prefs.dart';
class LitescribeAPI {
static final LitescribeAPI _instance = LitescribeAPI._internal();
factory LitescribeAPI({required String baseUrl}) {
_instance.baseUrl = baseUrl;
return _instance;
}
LitescribeAPI._internal();
HTTP client = HTTP();
late String baseUrl;
Future<LitescribeResponse> _getResponse(String endpoint) async {
final response = await client.get(
url: Uri.parse('$baseUrl$endpoint'),
proxyInfo:
Prefs.instance.useTor ? TorService.sharedInstance.proxyInfo : null,
);
if (response.code == 200) {
return LitescribeResponse(data: _validateJson(response.body));
} else {
throw Exception(
'LitescribeAPI _getResponse exception: Failed to load data');
}
}
Map<String, dynamic> _validateJson(String responseBody) {
final parsed = jsonDecode(responseBody);
if (parsed is Map<String, dynamic>) {
return parsed;
} else {
throw const FormatException(
'LitescribeAPI _validateJson exception: Invalid JSON format');
}
}
Future<List<InscriptionData>> getInscriptionsByAddress(String address,
{int cursor = 0, int size = 1000}) async {
// size param determines how many inscriptions are returned per response
// default of 1000 is used to cover most addresses (I assume)
// if the total number of inscriptions at the address exceeds the length of the list of inscriptions returned, another call with a higher size is made
final int defaultLimit = 1000;
final response = await _getResponse(
'/address/inscriptions?address=$address&cursor=$cursor&size=$size');
// Check if the number of returned inscriptions equals the limit
final int total = response.data['result']['total'] as int;
int currentSize = 0;
if (total == 0) {
return <InscriptionData>[];
}
final list = response.data['result']!['list'];
currentSize = list.length as int;
if (currentSize == size && currentSize < total) {
// If the number of returned inscriptions equals the limit and there are more inscriptions available,
// increment the cursor and make the next API call to fetch the remaining inscriptions.
final int newCursor = cursor + size;
return getInscriptionsByAddress(address, cursor: newCursor, size: size);
} else {
try {
// Iterate through the list and create InscriptionData objects from each element
final List<InscriptionData> inscriptions = (list as List<dynamic>)
.map((json) =>
InscriptionData.fromJson(json as Map<String, dynamic>))
.toList();
return inscriptions;
} catch (e) {
throw const FormatException(
'LitescribeAPI getInscriptionsByAddress exception: AddressInscriptionResponse.fromJson failure');
}
}
}
}