846 lines
24 KiB
Dart
846 lines
24 KiB
Dart
import 'package:easy_localization/easy_localization.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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import 'package:gecko/globals.dart';
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import 'package:gecko/models/chest_data.dart';
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import 'package:gecko/models/wallet_data.dart';
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import 'package:gecko/providers/home.dart';
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import 'package:gecko/providers/my_wallets.dart';
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import 'package:polkawallet_sdk/api/apiKeyring.dart';
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import 'package:polkawallet_sdk/api/types/networkParams.dart';
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import 'package:polkawallet_sdk/api/types/txInfoData.dart';
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import 'package:polkawallet_sdk/polkawallet_sdk.dart';
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import 'package:polkawallet_sdk/storage/keyring.dart';
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import 'package:polkawallet_sdk/storage/types/keyPairData.dart';
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import 'package:provider/provider.dart';
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import 'package:truncate/truncate.dart';
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// import 'package:web_socket_channel/io.dart';
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class SubstrateSdk with ChangeNotifier {
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final WalletSDK sdk = WalletSDK();
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final Keyring keyring = Keyring();
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String generatedMnemonic = '';
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bool sdkReady = false;
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bool sdkLoading = false;
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bool nodeConnected = false;
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bool importIsLoading = false;
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int blocNumber = 0;
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bool isLoadingEndpoint = false;
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String debugConnection = '';
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String transactionStatus = '';
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int ss58 = 42;
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TextEditingController jsonKeystore = TextEditingController();
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TextEditingController keystorePassword = TextEditingController();
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Future getStorage(String call) async {
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return await sdk.webView!.evalJavascript('api.query.$call');
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}
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Future<void> initApi() async {
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sdkLoading = true;
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await keyring.init([ss58]);
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keyring.setSS58(ss58);
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await sdk.init(keyring);
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sdkReady = true;
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sdkLoading = false;
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notifyListeners();
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}
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Future<void> connectNode(BuildContext ctx) async {
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HomeProvider homeProvider = Provider.of<HomeProvider>(ctx, listen: false);
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homeProvider.changeMessage("connectionPending".tr(), 0);
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// configBox.delete('customEndpoint');
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final List<NetworkParams> listEndpoints =
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configBox.containsKey('customEndpoint')
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? [getDuniterCustomEndpoint()]
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: getDuniterBootstrap();
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int timeout = 10000;
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if (sdk.api.connectedNode?.endpoint != null) {
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await sdk.api.setting.unsubscribeBestNumber();
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}
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isLoadingEndpoint = true;
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notifyListeners();
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final res = await sdk.api.connectNode(keyring, listEndpoints).timeout(
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Duration(milliseconds: timeout),
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onTimeout: () => null,
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);
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isLoadingEndpoint = false;
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notifyListeners();
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if (res != null) {
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nodeConnected = true;
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// await getSs58Prefix();
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// Subscribe bloc number
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sdk.api.setting.subscribeBestNumber((res) {
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blocNumber = int.parse(res.toString());
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// log.d(sdk.api.connectedNode?.endpoint);
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if (sdk.api.connectedNode?.endpoint == null) {
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nodeConnected = false;
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homeProvider.changeMessage("networkLost".tr(), 0);
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} else {
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nodeConnected = true;
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}
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notifyListeners();
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});
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// currencyName = await getCurencyName();
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notifyListeners();
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homeProvider.changeMessage(
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"wellConnectedToNode"
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.tr(args: [getConnectedEndpoint()!.split('/')[2]]),
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5);
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// snackNode(ctx, true);
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} else {
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nodeConnected = false;
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debugConnection = res.toString();
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notifyListeners();
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homeProvider.changeMessage("noDuniterEndointAvailable".tr(), 0);
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// snackNode(ctx, false);
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}
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log.d(sdk.api.connectedNode?.endpoint);
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}
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List<NetworkParams> getDuniterBootstrap() {
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List<NetworkParams> node = [];
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for (String endpoint in configBox.get('endpoint')) {
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final n = NetworkParams();
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n.name = currencyName;
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n.endpoint = endpoint;
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n.ss58 = ss58;
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node.add(n);
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}
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return node;
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}
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NetworkParams getDuniterCustomEndpoint() {
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final nodeParams = NetworkParams();
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nodeParams.name = currencyName;
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nodeParams.endpoint = configBox.get('customEndpoint');
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nodeParams.ss58 = ss58;
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return nodeParams;
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}
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Future<String> importAccount(
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{String mnemonic = '',
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bool fromMnemonic = false,
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String derivePath = '',
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String password = ''}) async {
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// toy exercise immense month enter answer table prefer speed cycle gold phone
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final clipboardData = await Clipboard.getData(Clipboard.kTextPlain);
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if (mnemonic != '') {
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fromMnemonic = true;
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generatedMnemonic = mnemonic;
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} else if (clipboardData!.text!.split(' ').length == 12) {
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fromMnemonic = true;
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generatedMnemonic = clipboardData.text!;
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}
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if (password == '') {
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password = keystorePassword.text;
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}
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final KeyType keytype;
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final String keyToImport;
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if (fromMnemonic) {
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keytype = KeyType.mnemonic;
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keyToImport = generatedMnemonic;
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} else {
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keytype = KeyType.keystore;
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keyToImport = jsonKeystore.text.replaceAll("'", "\\'");
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}
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importIsLoading = true;
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notifyListeners();
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if (clipboardData?.text != null) jsonKeystore.text = clipboardData!.text!;
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var json = await sdk.api.keyring
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.importAccount(keyring,
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keyType: keytype,
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key: keyToImport,
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name: derivePath,
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password: password,
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derivePath: derivePath,
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cryptoType: CryptoType.sr25519)
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.catchError((e) {
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importIsLoading = false;
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notifyListeners();
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});
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if (json == null) return '';
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// log.d(json);
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try {
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await sdk.api.keyring.addAccount(
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keyring,
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keyType: keytype,
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acc: json,
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password: password,
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);
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} catch (e) {
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log.e(e);
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importIsLoading = false;
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notifyListeners();
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}
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importIsLoading = false;
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notifyListeners();
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return keyring.allAccounts.last.address!;
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}
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void reload() {
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notifyListeners();
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}
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Future<List<AddressInfo>> getKeyStoreAddress() async {
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List<AddressInfo> result = [];
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for (var element in keyring.allAccounts) {
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final account = AddressInfo(address: element.address);
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account.balance = await getBalance(element.address!);
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result.add(account);
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}
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return result;
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}
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Future<int> getIdentityIndexOf(String address) async {
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return await getStorage('identity.identityIndexOf("$address")') ?? 0;
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}
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Future<List<int>> getCerts(String address) async {
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final idtyIndex = await getIdentityIndexOf(address);
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final certsReceiver =
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await getStorage('cert.storageIdtyCertMeta($idtyIndex)') ?? [];
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return [certsReceiver['receivedCount'], certsReceiver['issuedCount']];
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}
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Future<int> getCertValidityPeriod(String from, String to) async {
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final idtyIndexFrom = await getIdentityIndexOf(from);
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final idtyIndexTo = await getIdentityIndexOf(to);
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if (idtyIndexFrom == 0 || idtyIndexTo == 0) return 0;
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final List certData =
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await getStorage('cert.certsByReceiver($idtyIndexTo)') ?? [];
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if (certData.isEmpty) return 0;
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for (List certInfo in certData) {
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if (certInfo[0] == idtyIndexFrom) {
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return certInfo[1];
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}
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}
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return 0;
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}
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Future<Map<String, dynamic>> getParameters() async {
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final currencyParameters =
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await getStorage('parameters.parametersStorage()') ?? {};
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return currencyParameters;
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}
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Future<bool> hasAccountConsumers(String address) async {
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final accountInfo = await getStorage('system.account("$address")');
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final consumers = accountInfo['consumers'];
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return consumers == 0 ? false : true;
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}
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// Future<double> getBalance(String address) async {
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// double balance = 0.0;
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// if (nodeConnected) {
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// final brutBalance = await sdk.api.account.queryBalance(address);
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// // log.d(brutBalance?.toJson());
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// balance = int.parse(brutBalance!.freeBalance) / 100;
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// } else {
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// balance = -1;
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// }
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// await getUnclaimedUd(address);
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// return balance;
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// }
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Future<double> getBalance(String address) async {
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final balanceGlobal = await getStorage('system.account("$address")');
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// Get onchain storage values
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final idtyIndex = await getStorage('identity.identityIndexOf("$address")');
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final idtyData = await getStorage('identity.identities($idtyIndex)');
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final int currentUdIndex =
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int.parse(await getStorage('universalDividend.currentUdIndex()'));
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final List pastReevals =
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await getStorage('universalDividend.pastReevals()');
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// Compute amount of claimable UDs
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final int newUdsAmount = _computeClaimUds(currentUdIndex,
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idtyData?['data']?['firstEligibleUd'] ?? 0, pastReevals);
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// Calculate transferable and potential balance
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final int transferableBalance =
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(balanceGlobal['data']['free'] + newUdsAmount);
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final int potentialBalance =
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(balanceGlobal['data']['reserved'] + transferableBalance);
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log.i(
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'transferableBalance: $transferableBalance --- potentialBalance: $potentialBalance');
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return transferableBalance / 100;
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}
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int _computeClaimUds(
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int currentUdIndex, int firstEligibleUd, List pastReevals) {
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int totalAmount = 0;
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for (var reval in pastReevals.reversed) {
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final int revalNbr = reval[0];
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final int revalValue = reval[1];
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// Loop each UDs revaluations and sum unclaimed balance
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if (revalNbr <= firstEligibleUd) {
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final count = currentUdIndex - firstEligibleUd;
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totalAmount += count * revalValue;
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break;
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} else {
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final count = currentUdIndex - revalNbr;
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totalAmount += count * revalValue;
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currentUdIndex = revalNbr;
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}
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}
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return totalAmount;
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}
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Future<double> subscribeBalance(String address, {bool isUd = false}) async {
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double balance = 0.0;
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if (nodeConnected) {
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await sdk.api.account.subscribeBalance(address, (balanceData) {
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balance = int.parse(balanceData.freeBalance) / 100;
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notifyListeners();
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});
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}
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return balance;
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}
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KeyPairData getKeypair(String address) {
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return keyring.keyPairs.firstWhere((kp) => kp.address == address,
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orElse: (() => KeyPairData()));
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}
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Future<bool> checkPassword(String address, String pass) async {
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final account = getKeypair(address);
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return await sdk.api.keyring.checkPassword(account, pass);
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}
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Future<String> getSeed(String address, String pin) async {
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final account = getKeypair(address);
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keyring.setCurrent(account);
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final seed = await sdk.api.keyring.getDecryptedSeed(keyring, pin);
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String seedText;
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if (seed == null) {
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seedText = '';
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} else {
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seedText = seed.seed!.split('//')[0];
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}
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log.d(seedText);
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return seedText;
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}
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int getDerivationNumber(String address) {
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final account = getKeypair(address);
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final deriveNbr = account.name!.split('//')[1];
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return int.parse(deriveNbr);
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}
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Future<KeyPairData?> changePassword(BuildContext context, String address,
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String passOld, String? passNew) async {
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final account = getKeypair(address);
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MyWalletsProvider myWalletProvider =
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Provider.of<MyWalletsProvider>(context, listen: false);
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keyring.setCurrent(account);
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myWalletProvider.resetPinCode();
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return await sdk.api.keyring.changePassword(keyring, passOld, passNew);
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}
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Future<void> deleteAllAccounts() async {
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for (var account in keyring.allAccounts) {
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await sdk.api.keyring.deleteAccount(keyring, account);
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}
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}
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Future<void> deleteAccounts(List<String> address) async {
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for (var a in address) {
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final account = getKeypair(a);
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await sdk.api.keyring.deleteAccount(keyring, account);
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}
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}
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Future<String> generateMnemonic({String lang = appLang}) async {
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final gen = await sdk.api.keyring.generateMnemonic(ss58);
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generatedMnemonic = gen.mnemonic!;
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return gen.mnemonic!;
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}
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Future<String> setCurrentWallet(WalletData wallet) async {
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final currentChestNumber = configBox.get('currentChest');
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ChestData newChestData = chestBox.get(currentChestNumber)!;
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newChestData.defaultWallet = wallet.number;
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await chestBox.put(currentChestNumber, newChestData);
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try {
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final acc = getKeypair(wallet.address!);
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keyring.setCurrent(acc);
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return acc.address!;
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} catch (e) {
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return (e.toString());
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}
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}
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KeyPairData getCurrentWallet() {
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try {
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final acc = keyring.current;
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return acc;
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} catch (e) {
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return KeyPairData();
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}
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}
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Future<String> pay(
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{required String fromAddress,
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required String destAddress,
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required double amount,
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required String password}) async {
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transactionStatus = '';
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log.d(keyring.current.address);
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log.d(fromAddress);
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log.d(password);
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final fromPubkey = await sdk.api.account.decodeAddress([fromAddress]);
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log.d(fromPubkey!.keys.first);
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final sender = TxSenderData(
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fromAddress,
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fromPubkey.keys.first,
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);
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final txInfo = TxInfoData(
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'balances', amount == -1 ? 'transferAll' : 'transferKeepAlive', sender);
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final int amountUnit = (amount * 100).toInt();
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try {
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final hash = await sdk.api.tx.signAndSend(
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txInfo,
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[destAddress, amount == -1 ? false : amountUnit],
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password,
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onStatusChange: (status) {
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log.d('Transaction status: $status');
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transactionStatus = status;
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notifyListeners();
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},
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).timeout(
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const Duration(seconds: 12),
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onTimeout: () => {},
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);
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log.d(hash.toString());
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if (hash.isEmpty) {
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transactionStatus = 'timeout';
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notifyListeners();
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return 'timeout';
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} else {
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transactionStatus = hash.toString();
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notifyListeners();
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return hash.toString();
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}
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} catch (e) {
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transactionStatus = e.toString();
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notifyListeners();
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return e.toString();
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}
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}
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Future<String> certify(
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String fromAddress, String password, String toAddress) async {
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transactionStatus = '';
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log.d('me: $fromAddress');
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log.d('to: $toAddress');
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final myIdtyStatus = await idtyStatus(fromAddress);
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final toIdtyStatus = await idtyStatus(toAddress);
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final fromIndex = await getIdentityIndexOf(fromAddress);
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final toIndex = await getIdentityIndexOf(toAddress);
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log.d(myIdtyStatus);
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log.d(toIdtyStatus);
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if (myIdtyStatus != 'Validated') {
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transactionStatus = 'notMember';
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notifyListeners();
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return 'notMember';
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}
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final toCerts = await getCerts(toAddress);
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final currencyParameters = await getParameters();
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final sender = TxSenderData(
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keyring.current.address,
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keyring.current.pubKey,
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);
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TxInfoData txInfo;
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if (toIdtyStatus == 'noid') {
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txInfo = TxInfoData(
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'identity',
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'createIdentity',
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sender,
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);
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} else if (toIdtyStatus == 'Validated' ||
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toIdtyStatus == 'ConfirmedByOwner') {
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if (toCerts[0] >= currencyParameters['wotMinCertForMembership'] &&
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toIdtyStatus != 'Validated') {
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log.i('Batch cert and membership validation');
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txInfo = TxInfoData(
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'utility',
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'batchAll',
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sender,
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);
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} else {
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txInfo = TxInfoData(
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'cert',
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'addCert',
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sender,
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);
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}
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} else {
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transactionStatus = 'cantBeCert';
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notifyListeners();
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return 'cantBeCert';
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}
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log.d('Cert action: ${txInfo.call!}');
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try {
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List txOptions = [];
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if (txInfo.call == 'batchAll') {
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txOptions = [
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'cert.addCert($fromIndex, $toIndex)',
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'identity.validateIdentity($toIndex)'
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];
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} else if (txInfo.call == 'createIdentity') {
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txOptions = [toAddress];
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} else if (txInfo.call == 'addCert') {
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txOptions = [fromIndex, toIndex];
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} else {
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log.e('TX call is unexpected');
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return 'Ğecko says: TX call is unexpected';
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}
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final hash = await sdk.api.tx
|
|
.signAndSend(
|
|
txInfo,
|
|
txOptions,
|
|
password,
|
|
)
|
|
.timeout(
|
|
const Duration(seconds: 12),
|
|
onTimeout: () => {},
|
|
);
|
|
log.d(hash);
|
|
if (hash.isEmpty) {
|
|
transactionStatus = 'timeout';
|
|
notifyListeners();
|
|
|
|
return 'timeout';
|
|
} else {
|
|
transactionStatus = hash.toString();
|
|
notifyListeners();
|
|
return hash.toString();
|
|
}
|
|
} catch (e) {
|
|
transactionStatus = e.toString();
|
|
notifyListeners();
|
|
return e.toString();
|
|
}
|
|
}
|
|
|
|
Future<String> idtyStatus(String address, [bool smooth = true]) async {
|
|
var idtyIndex = await getIdentityIndexOf(address);
|
|
|
|
if (idtyIndex == 0) {
|
|
return 'noid';
|
|
}
|
|
|
|
final idtyStatus = await getStorage('identity.identities($idtyIndex)');
|
|
|
|
if (idtyStatus != null) {
|
|
final String status = idtyStatus['status'];
|
|
|
|
return (status);
|
|
} else {
|
|
return 'expired';
|
|
}
|
|
}
|
|
|
|
Future<String> confirmIdentity(
|
|
String fromAddress, String name, String password) async {
|
|
log.d('me: ${keyring.current.address!}');
|
|
|
|
final sender = TxSenderData(
|
|
keyring.current.address,
|
|
keyring.current.pubKey,
|
|
);
|
|
|
|
final txInfo = TxInfoData(
|
|
'identity',
|
|
'confirmIdentity',
|
|
sender,
|
|
);
|
|
|
|
try {
|
|
final hash = await sdk.api.tx.signAndSend(
|
|
txInfo,
|
|
[name],
|
|
password,
|
|
onStatusChange: (status) {
|
|
log.d('Transaction status: $status');
|
|
transactionStatus = status;
|
|
notifyListeners();
|
|
},
|
|
).timeout(
|
|
const Duration(seconds: 12),
|
|
onTimeout: () => {},
|
|
);
|
|
log.d(hash);
|
|
if (hash.isEmpty) {
|
|
transactionStatus = 'timeout';
|
|
notifyListeners();
|
|
|
|
return 'timeout';
|
|
} else {
|
|
transactionStatus = hash.toString();
|
|
notifyListeners();
|
|
return hash.toString();
|
|
}
|
|
} on Exception catch (e) {
|
|
log.e(e);
|
|
transactionStatus = e.toString();
|
|
notifyListeners();
|
|
return e.toString();
|
|
}
|
|
}
|
|
|
|
Future<bool> isMemberGet(String address) async {
|
|
return await idtyStatus(address) == 'Validated';
|
|
}
|
|
|
|
Future<String> getMemberAddress() async {
|
|
// TODOO: Continue digging memberAddress detection
|
|
String memberAddress = '';
|
|
walletBox.toMap().forEach((key, value) async {
|
|
final bool isMember = await isMemberGet(value.address!);
|
|
log.d(isMember);
|
|
if (isMember) {
|
|
final currentChestNumber = configBox.get('currentChest');
|
|
ChestData newChestData = chestBox.get(currentChestNumber)!;
|
|
newChestData.memberWallet = value.number;
|
|
await chestBox.put(currentChestNumber, newChestData);
|
|
memberAddress = value.address!;
|
|
return;
|
|
}
|
|
});
|
|
log.d(memberAddress);
|
|
return memberAddress;
|
|
}
|
|
|
|
Future<Map<String, int>> certState(String from, String to) async {
|
|
Map<String, int> result = {};
|
|
if (from != to && await isMemberGet(from)) {
|
|
final removableOn = await getCertValidityPeriod(from, to);
|
|
final certMeta = await getCertMeta(from);
|
|
final int nextIssuableOn = certMeta['nextIssuableOn'] ?? 0;
|
|
final certRemovableDuration = (removableOn - blocNumber) * 6;
|
|
const int renewDelay = 2 * 30 * 24 * 3600; // 2 months
|
|
|
|
if (certRemovableDuration >= renewDelay) {
|
|
final certRenewDuration = certRemovableDuration - renewDelay;
|
|
result.putIfAbsent('certRenewable', () => certRenewDuration);
|
|
} else if (nextIssuableOn > blocNumber) {
|
|
final certDelayDuration = (nextIssuableOn - blocNumber) * 6;
|
|
result.putIfAbsent('certDelay', () => certDelayDuration);
|
|
} else {
|
|
result.putIfAbsent('canCert', () => 0);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
Future<Map> getCertMeta(String address) async {
|
|
var idtyIndex = await getIdentityIndexOf(address);
|
|
|
|
final certMeta =
|
|
await getStorage('cert.storageIdtyCertMeta($idtyIndex)') ?? '';
|
|
|
|
return certMeta;
|
|
}
|
|
|
|
Future revokeIdentity(String address, String password) async {
|
|
final idtyIndex = await getIdentityIndexOf(address);
|
|
|
|
final sender = TxSenderData(
|
|
keyring.current.address,
|
|
keyring.current.pubKey,
|
|
);
|
|
|
|
log.d(sender.address);
|
|
TxInfoData txInfo;
|
|
|
|
txInfo = TxInfoData(
|
|
'membership',
|
|
'revokeMembership',
|
|
sender,
|
|
);
|
|
|
|
try {
|
|
final hash = await sdk.api.tx
|
|
.signAndSend(
|
|
txInfo,
|
|
[idtyIndex],
|
|
password,
|
|
)
|
|
.timeout(
|
|
const Duration(seconds: 12),
|
|
onTimeout: () => {},
|
|
);
|
|
log.d(hash);
|
|
if (hash.isEmpty) {
|
|
transactionStatus = 'timeout';
|
|
notifyListeners();
|
|
|
|
return 'timeout';
|
|
} else {
|
|
transactionStatus = hash.toString();
|
|
notifyListeners();
|
|
return hash.toString();
|
|
}
|
|
} catch (e) {
|
|
transactionStatus = e.toString();
|
|
notifyListeners();
|
|
return e.toString();
|
|
}
|
|
}
|
|
|
|
Future getCurencyName() async {}
|
|
|
|
Future<String> derive(
|
|
BuildContext context, String address, int number, String password) async {
|
|
final keypair = getKeypair(address);
|
|
|
|
final seedMap =
|
|
await keyring.store.getDecryptedSeed(keypair.pubKey, password);
|
|
|
|
if (seedMap?['type'] != 'mnemonic') return '';
|
|
final List seedList = seedMap!['seed'].split('//');
|
|
generatedMnemonic = seedList[0];
|
|
|
|
return await importAccount(
|
|
mnemonic: generatedMnemonic,
|
|
fromMnemonic: true,
|
|
derivePath: '//$number',
|
|
password: password);
|
|
}
|
|
|
|
Future<String> generateRootKeypair(String address, String password) async {
|
|
final keypair = getKeypair(address);
|
|
|
|
final seedMap =
|
|
await keyring.store.getDecryptedSeed(keypair.pubKey, password);
|
|
|
|
if (seedMap?['type'] != 'mnemonic') return '';
|
|
final List seedList = seedMap!['seed'].split('//');
|
|
generatedMnemonic = seedList[0];
|
|
|
|
return await importAccount(fromMnemonic: true, password: password);
|
|
}
|
|
|
|
Future<bool> isMnemonicValid(String mnemonic) async {
|
|
// Needed for bad encoding of UTF-8
|
|
mnemonic = mnemonic.replaceAll('é', 'é');
|
|
mnemonic = mnemonic.replaceAll('è', 'è');
|
|
|
|
return await sdk.api.keyring.checkMnemonicValid(mnemonic);
|
|
}
|
|
|
|
String? getConnectedEndpoint() {
|
|
return sdk.api.connectedNode?.endpoint;
|
|
}
|
|
|
|
Future<int> getSs58Prefix() async {
|
|
final List res = await sdk.webView!.evalJavascript(
|
|
'api.consts.system.ss58Prefix.words',
|
|
wrapPromise: false) ??
|
|
[42];
|
|
|
|
ss58 = res[0];
|
|
log.d(ss58);
|
|
return ss58;
|
|
}
|
|
}
|
|
|
|
void snack(BuildContext context, String message, {int duration = 2}) {
|
|
final snackBar =
|
|
SnackBar(content: Text(message), duration: Duration(seconds: duration));
|
|
ScaffoldMessenger.of(context).showSnackBar(snackBar);
|
|
}
|
|
|
|
class AddressInfo {
|
|
final String? address;
|
|
double balance;
|
|
|
|
AddressInfo({@required this.address, this.balance = 0});
|
|
}
|
|
|
|
void snackNode(BuildContext context, bool isConnected) {
|
|
String message;
|
|
if (!isConnected) {
|
|
message =
|
|
"${"noDuniterNodeAvailableTryLater".tr()}:\n${configBox.get('endpoint').first}";
|
|
} else {
|
|
SubstrateSdk sub = Provider.of<SubstrateSdk>(context, listen: false);
|
|
|
|
message =
|
|
"${"youAreConnectedToNode".tr()}\n${sub.getConnectedEndpoint()!.split('//')[1]}";
|
|
}
|
|
final snackBar = SnackBar(
|
|
padding: const EdgeInsets.all(20),
|
|
content: Text(message, style: const TextStyle(fontSize: 16)),
|
|
duration: const Duration(seconds: 4));
|
|
ScaffoldMessenger.of(context).showSnackBar(snackBar);
|
|
}
|
|
|
|
String getShortPubkey(String pubkey) {
|
|
String pubkeyShort = truncate(pubkey, 7,
|
|
omission: String.fromCharCode(0x2026),
|
|
position: TruncatePosition.end) +
|
|
truncate(pubkey, 6, omission: "", position: TruncatePosition.start);
|
|
return pubkeyShort;
|
|
}
|
|
|
|
class PasswordException implements Exception {
|
|
String cause;
|
|
PasswordException(this.cause);
|
|
}
|