mirror of
https://github.com/cypherstack/stack_wallet.git
synced 2024-11-17 01:37:54 +00:00
683 lines
21 KiB
Dart
683 lines
21 KiB
Dart
import 'dart:async';
|
|
import 'dart:convert';
|
|
|
|
import 'package:isar/isar.dart';
|
|
import 'package:nanodart/nanodart.dart';
|
|
import 'package:stackwallet/models/balance.dart';
|
|
import 'package:stackwallet/models/isar/models/blockchain_data/address.dart';
|
|
import 'package:stackwallet/models/isar/models/blockchain_data/transaction.dart';
|
|
import 'package:stackwallet/models/node_model.dart';
|
|
import 'package:stackwallet/models/paymint/fee_object_model.dart';
|
|
import 'package:stackwallet/networking/http.dart';
|
|
import 'package:stackwallet/services/nano_api.dart';
|
|
import 'package:stackwallet/services/node_service.dart';
|
|
import 'package:stackwallet/services/tor_service.dart';
|
|
import 'package:stackwallet/utilities/amount/amount.dart';
|
|
import 'package:stackwallet/utilities/default_nodes.dart';
|
|
import 'package:stackwallet/utilities/enums/coin_enum.dart';
|
|
import 'package:stackwallet/utilities/extensions/impl/string.dart';
|
|
import 'package:stackwallet/utilities/logger.dart';
|
|
import 'package:stackwallet/wallets/crypto_currency/intermediate/nano_currency.dart';
|
|
import 'package:stackwallet/wallets/models/tx_data.dart';
|
|
import 'package:stackwallet/wallets/wallet/intermediate/bip39_wallet.dart';
|
|
import 'package:tuple/tuple.dart';
|
|
|
|
const _kWorkServer = "https://rpc.nano.to";
|
|
|
|
mixin NanoInterface<T extends NanoCurrency> on Bip39Wallet<T> {
|
|
// since nano based coins only have a single address/account we can cache
|
|
// the address instead of fetching from db every time we need it in certain
|
|
// cases
|
|
Address? _cachedAddress;
|
|
|
|
NodeModel? _cachedNode;
|
|
|
|
final _httpClient = HTTP();
|
|
|
|
Future<String?> _requestWork(String hash) async {
|
|
return _httpClient
|
|
.post(
|
|
url: Uri.parse(_kWorkServer), // this should be a
|
|
headers: {'Content-type': 'application/json'},
|
|
body: json.encode(
|
|
{
|
|
"action": "work_generate",
|
|
"hash": hash,
|
|
},
|
|
),
|
|
proxyInfo: prefs.useTor ? TorService.sharedInstance.getProxyInfo() : null,
|
|
)
|
|
.then((_httpClient) {
|
|
if (_httpClient.code == 200) {
|
|
final Map<String, dynamic> decoded =
|
|
json.decode(_httpClient.body) as Map<String, dynamic>;
|
|
if (decoded.containsKey("error")) {
|
|
throw Exception("Received error ${decoded["error"]}");
|
|
}
|
|
return decoded["work"] as String?;
|
|
} else {
|
|
throw Exception("Received error ${_httpClient.code}");
|
|
}
|
|
});
|
|
}
|
|
|
|
Future<String> _getPrivateKeyFromMnemonic() async {
|
|
final mnemonicList = await getMnemonicAsWords();
|
|
final seed = NanoMnemomics.mnemonicListToSeed(mnemonicList);
|
|
return NanoKeys.seedToPrivate(seed, 0);
|
|
}
|
|
|
|
Future<Address> _getAddressFromMnemonic() async {
|
|
final publicKey = NanoKeys.createPublicKey(
|
|
await _getPrivateKeyFromMnemonic(),
|
|
);
|
|
|
|
final addressString =
|
|
NanoAccounts.createAccount(cryptoCurrency.nanoAccountType, publicKey);
|
|
|
|
return Address(
|
|
walletId: walletId,
|
|
value: addressString,
|
|
publicKey: publicKey.toUint8ListFromHex,
|
|
derivationIndex: 0,
|
|
derivationPath: null,
|
|
type: cryptoCurrency.coin.primaryAddressType,
|
|
subType: AddressSubType.receiving,
|
|
);
|
|
}
|
|
|
|
Future<void> _receiveBlock(
|
|
String blockHash,
|
|
String source,
|
|
String amountRaw,
|
|
String publicAddress,
|
|
) async {
|
|
// TODO: the opening block of an account is a special case
|
|
bool openBlock = false;
|
|
|
|
final headers = {
|
|
"Content-Type": "application/json",
|
|
};
|
|
|
|
// first check if the account is open:
|
|
// get the account info (we need the frontier and representative):
|
|
final infoBody = jsonEncode({
|
|
"action": "account_info",
|
|
"representative": "true",
|
|
"account": publicAddress,
|
|
});
|
|
final infoResponse = await _httpClient.post(
|
|
url: Uri.parse(getCurrentNode().host),
|
|
headers: headers,
|
|
body: infoBody,
|
|
proxyInfo: prefs.useTor ? TorService.sharedInstance.getProxyInfo() : null,
|
|
);
|
|
final infoData = jsonDecode(infoResponse.body);
|
|
|
|
if (infoData["error"] != null) {
|
|
// account is not open yet, we need to create an open block:
|
|
openBlock = true;
|
|
}
|
|
|
|
// first get the account balance:
|
|
final balanceBody = jsonEncode({
|
|
"action": "account_balance",
|
|
"account": publicAddress,
|
|
});
|
|
|
|
final balanceResponse = await _httpClient.post(
|
|
url: Uri.parse(getCurrentNode().host),
|
|
headers: headers,
|
|
body: balanceBody,
|
|
proxyInfo: prefs.useTor ? TorService.sharedInstance.getProxyInfo() : null,
|
|
);
|
|
|
|
final balanceData = jsonDecode(balanceResponse.body);
|
|
final BigInt currentBalance =
|
|
BigInt.parse(balanceData["balance"].toString());
|
|
final BigInt txAmount = BigInt.parse(amountRaw);
|
|
final BigInt balanceAfterTx = currentBalance + txAmount;
|
|
|
|
String frontier = infoData["frontier"].toString();
|
|
String representative = infoData["representative"].toString();
|
|
|
|
if (openBlock) {
|
|
// we don't have a representative set yet:
|
|
representative = cryptoCurrency.defaultRepresentative;
|
|
}
|
|
|
|
// link = send block hash:
|
|
final String link = blockHash;
|
|
// this "linkAsAccount" is meaningless:
|
|
final String linkAsAccount =
|
|
NanoAccounts.createAccount(NanoAccountType.BANANO, blockHash);
|
|
|
|
// construct the receive block:
|
|
Map<String, String> receiveBlock = {
|
|
"type": "state",
|
|
"account": publicAddress,
|
|
"previous": openBlock
|
|
? "0000000000000000000000000000000000000000000000000000000000000000"
|
|
: frontier,
|
|
"representative": representative,
|
|
"balance": balanceAfterTx.toString(),
|
|
"link": link,
|
|
"link_as_account": linkAsAccount,
|
|
};
|
|
|
|
// sign the receive block:
|
|
final String hash = NanoBlocks.computeStateHash(
|
|
NanoAccountType.BANANO,
|
|
receiveBlock["account"]!,
|
|
receiveBlock["previous"]!,
|
|
receiveBlock["representative"]!,
|
|
BigInt.parse(receiveBlock["balance"]!),
|
|
receiveBlock["link"]!,
|
|
);
|
|
final String privateKey = await _getPrivateKeyFromMnemonic();
|
|
final String signature = NanoSignatures.signBlock(hash, privateKey);
|
|
|
|
// get PoW for the receive block:
|
|
String? work;
|
|
if (openBlock) {
|
|
work = await _requestWork(NanoAccounts.extractPublicKey(publicAddress));
|
|
} else {
|
|
work = await _requestWork(frontier);
|
|
}
|
|
if (work == null) {
|
|
throw Exception("Failed to get PoW for receive block");
|
|
}
|
|
receiveBlock["link_as_account"] = linkAsAccount;
|
|
receiveBlock["signature"] = signature;
|
|
receiveBlock["work"] = work;
|
|
|
|
// process the receive block:
|
|
|
|
final processBody = jsonEncode({
|
|
"action": "process",
|
|
"json_block": "true",
|
|
"subtype": "receive",
|
|
"block": receiveBlock,
|
|
});
|
|
final processResponse = await _httpClient.post(
|
|
url: Uri.parse(getCurrentNode().host),
|
|
headers: headers,
|
|
body: processBody,
|
|
proxyInfo: prefs.useTor ? TorService.sharedInstance.getProxyInfo() : null,
|
|
);
|
|
|
|
final Map<String, dynamic> decoded =
|
|
json.decode(processResponse.body) as Map<String, dynamic>;
|
|
if (decoded.containsKey("error")) {
|
|
throw Exception("Received error ${decoded["error"]}");
|
|
}
|
|
}
|
|
|
|
Future<void> _confirmAllReceivable(String accountAddress) async {
|
|
final receivableResponse = await _httpClient.post(
|
|
url: Uri.parse(getCurrentNode().host),
|
|
headers: {"Content-Type": "application/json"},
|
|
body: jsonEncode({
|
|
"action": "receivable",
|
|
"source": "true",
|
|
"account": accountAddress,
|
|
"count": "-1",
|
|
}),
|
|
proxyInfo: prefs.useTor ? TorService.sharedInstance.getProxyInfo() : null,
|
|
);
|
|
|
|
final receivableData = await jsonDecode(receivableResponse.body);
|
|
if (receivableData["blocks"] == "") {
|
|
return;
|
|
}
|
|
final blocks = receivableData["blocks"] as Map<String, dynamic>;
|
|
// confirm all receivable blocks:
|
|
for (final blockHash in blocks.keys) {
|
|
final block = blocks[blockHash];
|
|
final String amountRaw = block["amount"] as String;
|
|
final String source = block["source"] as String;
|
|
await _receiveBlock(blockHash, source, amountRaw, accountAddress);
|
|
// a bit of a hack:
|
|
await Future<void>.delayed(const Duration(seconds: 1));
|
|
}
|
|
}
|
|
|
|
//========= public ===========================================================
|
|
|
|
Future<String> getCurrentRepresentative() async {
|
|
final serverURI = Uri.parse(getCurrentNode().host);
|
|
final address =
|
|
(_cachedAddress ?? await getCurrentReceivingAddress())!.value;
|
|
|
|
final response = await NanoAPI.getAccountInfo(
|
|
server: serverURI,
|
|
representative: true,
|
|
account: address,
|
|
);
|
|
|
|
return response.accountInfo?.representative ??
|
|
cryptoCurrency.defaultRepresentative;
|
|
}
|
|
|
|
Future<bool> changeRepresentative(String newRepresentative) async {
|
|
try {
|
|
final serverURI = Uri.parse(getCurrentNode().host);
|
|
await updateBalance();
|
|
final balance = info.cachedBalance.spendable.raw.toString();
|
|
final String privateKey = await _getPrivateKeyFromMnemonic();
|
|
final address =
|
|
(_cachedAddress ?? await getCurrentReceivingAddress())!.value;
|
|
|
|
final response = await NanoAPI.getAccountInfo(
|
|
server: serverURI,
|
|
representative: true,
|
|
account: address,
|
|
);
|
|
|
|
if (response.accountInfo == null) {
|
|
throw response.exception ?? Exception("Failed to get account info");
|
|
}
|
|
|
|
final work = await _requestWork(response.accountInfo!.frontier);
|
|
|
|
return await NanoAPI.changeRepresentative(
|
|
server: serverURI,
|
|
accountType: NanoAccountType.BANANO,
|
|
account: address,
|
|
newRepresentative: newRepresentative,
|
|
previousBlock: response.accountInfo!.frontier,
|
|
balance: balance,
|
|
privateKey: privateKey,
|
|
work: work!,
|
|
);
|
|
} catch (_) {
|
|
rethrow;
|
|
}
|
|
}
|
|
|
|
//========= overrides ========================================================
|
|
|
|
@override
|
|
Future<void> updateNode() async {
|
|
_cachedNode = NodeService(secureStorageInterface: secureStorageInterface)
|
|
.getPrimaryNodeFor(coin: info.coin) ??
|
|
DefaultNodes.getNodeFor(info.coin);
|
|
|
|
unawaited(refresh());
|
|
}
|
|
|
|
@override
|
|
NodeModel getCurrentNode() {
|
|
return _cachedNode ??
|
|
NodeService(secureStorageInterface: secureStorageInterface)
|
|
.getPrimaryNodeFor(coin: info.coin) ??
|
|
DefaultNodes.getNodeFor(info.coin);
|
|
}
|
|
|
|
@override
|
|
Future<void> checkSaveInitialReceivingAddress() async {
|
|
try {
|
|
_cachedAddress = await getCurrentReceivingAddress();
|
|
if (_cachedAddress == null) {
|
|
_cachedAddress = await _getAddressFromMnemonic();
|
|
await mainDB.updateOrPutAddresses([_cachedAddress!]);
|
|
}
|
|
} catch (e, s) {
|
|
// do nothing, still allow user into wallet
|
|
Logging.instance.log(
|
|
"$runtimeType checkSaveInitialReceivingAddress() failed: $e\n$s",
|
|
level: LogLevel.Error,
|
|
);
|
|
}
|
|
}
|
|
|
|
@override
|
|
Future<bool> pingCheck() async {
|
|
final uri = Uri.parse(getCurrentNode().host);
|
|
|
|
final response = await _httpClient.post(
|
|
url: uri,
|
|
headers: {"Content-Type": "application/json"},
|
|
body: jsonEncode(
|
|
{
|
|
"action": "version",
|
|
},
|
|
),
|
|
proxyInfo: prefs.useTor ? TorService.sharedInstance.getProxyInfo() : null,
|
|
);
|
|
|
|
return response.code == 200;
|
|
}
|
|
|
|
@override
|
|
Future<TxData> prepareSend({required TxData txData}) async {
|
|
if (txData.recipients!.length != 1) {
|
|
throw ArgumentError(
|
|
"${cryptoCurrency.runtimeType} currently only "
|
|
"supports one recipient per transaction",
|
|
);
|
|
}
|
|
|
|
return txData.copyWith(
|
|
fee: Amount(
|
|
rawValue: BigInt.zero,
|
|
fractionDigits: cryptoCurrency.fractionDigits,
|
|
),
|
|
);
|
|
}
|
|
|
|
@override
|
|
Future<TxData> confirmSend({required TxData txData}) async {
|
|
try {
|
|
// our address:
|
|
final String publicAddress =
|
|
(_cachedAddress ?? await getCurrentReceivingAddress())!.value;
|
|
|
|
// first update to get latest account balance:
|
|
|
|
final currentBalance = info.cachedBalance.spendable;
|
|
final txAmount = txData.amount!;
|
|
final BigInt balanceAfterTx = (currentBalance - txAmount).raw;
|
|
|
|
// get the account info (we need the frontier and representative):
|
|
final infoBody = jsonEncode({
|
|
"action": "account_info",
|
|
"representative": "true",
|
|
"account": publicAddress,
|
|
});
|
|
|
|
final headers = {
|
|
"Content-Type": "application/json",
|
|
};
|
|
|
|
final infoResponse = await _httpClient.post(
|
|
url: Uri.parse(getCurrentNode().host),
|
|
headers: headers,
|
|
body: infoBody,
|
|
proxyInfo:
|
|
prefs.useTor ? TorService.sharedInstance.getProxyInfo() : null,
|
|
);
|
|
|
|
final String frontier =
|
|
jsonDecode(infoResponse.body)["frontier"].toString();
|
|
final String representative =
|
|
jsonDecode(infoResponse.body)["representative"].toString();
|
|
// link = destination address:
|
|
final String linkAsAccount = txData.recipients!.first.address;
|
|
final String link = NanoAccounts.extractPublicKey(linkAsAccount);
|
|
|
|
// construct the send block:
|
|
Map<String, String> sendBlock = {
|
|
"type": "state",
|
|
"account": publicAddress,
|
|
"previous": frontier,
|
|
"representative": representative,
|
|
"balance": balanceAfterTx.toString(),
|
|
"link": link,
|
|
};
|
|
|
|
// sign the send block:
|
|
final String hash = NanoBlocks.computeStateHash(
|
|
NanoAccountType.BANANO,
|
|
sendBlock["account"]!,
|
|
sendBlock["previous"]!,
|
|
sendBlock["representative"]!,
|
|
BigInt.parse(sendBlock["balance"]!),
|
|
sendBlock["link"]!,
|
|
);
|
|
final String privateKey = await _getPrivateKeyFromMnemonic();
|
|
final String signature = NanoSignatures.signBlock(hash, privateKey);
|
|
|
|
// get PoW for the send block:
|
|
final String? work = await _requestWork(frontier);
|
|
if (work == null) {
|
|
throw Exception("Failed to get PoW for send block");
|
|
}
|
|
|
|
sendBlock["link_as_account"] = linkAsAccount;
|
|
sendBlock["signature"] = signature;
|
|
sendBlock["work"] = work;
|
|
|
|
final processBody = jsonEncode({
|
|
"action": "process",
|
|
"json_block": "true",
|
|
"subtype": "send",
|
|
"block": sendBlock,
|
|
});
|
|
final processResponse = await _httpClient.post(
|
|
url: Uri.parse(getCurrentNode().host),
|
|
headers: headers,
|
|
body: processBody,
|
|
proxyInfo:
|
|
prefs.useTor ? TorService.sharedInstance.getProxyInfo() : null,
|
|
);
|
|
|
|
final Map<String, dynamic> decoded =
|
|
json.decode(processResponse.body) as Map<String, dynamic>;
|
|
if (decoded.containsKey("error")) {
|
|
throw Exception("Received error ${decoded["error"]}");
|
|
}
|
|
|
|
// return the hash of the transaction:
|
|
return txData.copyWith(
|
|
txid: decoded["hash"].toString(),
|
|
);
|
|
} catch (e, s) {
|
|
Logging.instance
|
|
.log("Error sending transaction $e - $s", level: LogLevel.Error);
|
|
rethrow;
|
|
}
|
|
}
|
|
|
|
@override
|
|
Future<void> recover({required bool isRescan}) async {
|
|
try {
|
|
await refreshMutex.protect(() async {
|
|
if (isRescan) {
|
|
await mainDB.deleteWalletBlockchainData(walletId);
|
|
}
|
|
_cachedAddress = await _getAddressFromMnemonic();
|
|
|
|
await mainDB.updateOrPutAddresses([_cachedAddress!]);
|
|
});
|
|
|
|
await refresh();
|
|
} catch (e) {
|
|
rethrow;
|
|
}
|
|
}
|
|
|
|
@override
|
|
Future<void> updateTransactions() async {
|
|
await updateChainHeight();
|
|
final receivingAddress =
|
|
(_cachedAddress ?? await getCurrentReceivingAddress())!;
|
|
final String publicAddress = receivingAddress.value;
|
|
await _confirmAllReceivable(publicAddress);
|
|
final response = await _httpClient.post(
|
|
url: Uri.parse(getCurrentNode().host),
|
|
headers: {"Content-Type": "application/json"},
|
|
body: jsonEncode({
|
|
"action": "account_history",
|
|
"account": publicAddress,
|
|
"count": "-1",
|
|
}),
|
|
proxyInfo: prefs.useTor ? TorService.sharedInstance.getProxyInfo() : null,
|
|
);
|
|
final data = await jsonDecode(response.body);
|
|
final transactions =
|
|
data["history"] is List ? data["history"] as List<dynamic> : [];
|
|
if (transactions.isEmpty) {
|
|
return;
|
|
} else {
|
|
List<Tuple2<Transaction, Address?>> transactionList = [];
|
|
for (var tx in transactions) {
|
|
var typeString = tx["type"].toString();
|
|
TransactionType transactionType = TransactionType.unknown;
|
|
if (typeString == "send") {
|
|
transactionType = TransactionType.outgoing;
|
|
} else if (typeString == "receive") {
|
|
transactionType = TransactionType.incoming;
|
|
}
|
|
final amount = Amount(
|
|
rawValue: BigInt.parse(tx["amount"].toString()),
|
|
fractionDigits: cryptoCurrency.fractionDigits,
|
|
);
|
|
|
|
var transaction = Transaction(
|
|
walletId: walletId,
|
|
txid: tx["hash"].toString(),
|
|
timestamp: int.parse(tx["local_timestamp"].toString()),
|
|
type: transactionType,
|
|
subType: TransactionSubType.none,
|
|
amount: 0,
|
|
amountString: amount.toJsonString(),
|
|
fee: 0,
|
|
height: int.parse(tx["height"].toString()),
|
|
isCancelled: false,
|
|
isLelantus: false,
|
|
slateId: "",
|
|
otherData: "",
|
|
inputs: [],
|
|
outputs: [],
|
|
nonce: 0,
|
|
numberOfMessages: null,
|
|
);
|
|
|
|
Address address = transactionType == TransactionType.incoming
|
|
? receivingAddress
|
|
: Address(
|
|
walletId: walletId,
|
|
publicKey: [],
|
|
value: tx["account"].toString(),
|
|
derivationIndex: 0,
|
|
derivationPath: null,
|
|
type: info.coin.primaryAddressType,
|
|
subType: AddressSubType.nonWallet,
|
|
);
|
|
Tuple2<Transaction, Address> tuple = Tuple2(transaction, address);
|
|
transactionList.add(tuple);
|
|
}
|
|
|
|
await mainDB.addNewTransactionData(transactionList, walletId);
|
|
}
|
|
}
|
|
|
|
@override
|
|
Future<void> updateBalance() async {
|
|
try {
|
|
final addressString =
|
|
(_cachedAddress ??= (await getCurrentReceivingAddress())!).value;
|
|
final body = jsonEncode({
|
|
"action": "account_balance",
|
|
"account": addressString,
|
|
});
|
|
final headers = {
|
|
"Content-Type": "application/json",
|
|
};
|
|
|
|
final response = await _httpClient.post(
|
|
url: Uri.parse(getCurrentNode().host),
|
|
headers: headers,
|
|
body: body,
|
|
proxyInfo:
|
|
prefs.useTor ? TorService.sharedInstance.getProxyInfo() : null,
|
|
);
|
|
final data = jsonDecode(response.body);
|
|
final balance = Balance(
|
|
total: Amount(
|
|
rawValue: (BigInt.parse(data["balance"].toString()) +
|
|
BigInt.parse(data["receivable"].toString())),
|
|
fractionDigits: cryptoCurrency.fractionDigits,
|
|
),
|
|
spendable: Amount(
|
|
rawValue: BigInt.parse(data["balance"].toString()),
|
|
fractionDigits: cryptoCurrency.fractionDigits,
|
|
),
|
|
blockedTotal: Amount(
|
|
rawValue: BigInt.parse("0"),
|
|
fractionDigits: cryptoCurrency.fractionDigits,
|
|
),
|
|
pendingSpendable: Amount(
|
|
rawValue: BigInt.parse(data["receivable"].toString()),
|
|
fractionDigits: cryptoCurrency.fractionDigits,
|
|
),
|
|
);
|
|
|
|
await info.updateBalance(newBalance: balance, isar: mainDB.isar);
|
|
} catch (e, s) {
|
|
Logging.instance.log(
|
|
"Failed to update ${cryptoCurrency.runtimeType} balance: $e\n$s",
|
|
level: LogLevel.Warning,
|
|
);
|
|
}
|
|
}
|
|
|
|
@override
|
|
Future<void> updateChainHeight() async {
|
|
try {
|
|
final String publicAddress =
|
|
(_cachedAddress ??= (await getCurrentReceivingAddress())!).value;
|
|
|
|
final infoBody = jsonEncode({
|
|
"action": "account_info",
|
|
"account": publicAddress,
|
|
});
|
|
final headers = {
|
|
"Content-Type": "application/json",
|
|
};
|
|
final infoResponse = await _httpClient.post(
|
|
url: Uri.parse(getCurrentNode().host),
|
|
headers: headers,
|
|
body: infoBody,
|
|
proxyInfo:
|
|
prefs.useTor ? TorService.sharedInstance.getProxyInfo() : null,
|
|
);
|
|
final infoData = jsonDecode(infoResponse.body);
|
|
|
|
final height = int.tryParse(
|
|
infoData["confirmation_height"].toString(),
|
|
) ??
|
|
0;
|
|
|
|
await info.updateCachedChainHeight(newHeight: height, isar: mainDB.isar);
|
|
} catch (e, s) {
|
|
Logging.instance.log(
|
|
"Failed to update ${cryptoCurrency.runtimeType} chain height: $e\n$s",
|
|
level: LogLevel.Warning,
|
|
);
|
|
}
|
|
}
|
|
|
|
@override
|
|
FilterOperation? get changeAddressFilterOperation =>
|
|
FilterGroup.and(standardChangeAddressFilters);
|
|
|
|
@override
|
|
FilterOperation? get receivingAddressFilterOperation =>
|
|
FilterGroup.and(standardReceivingAddressFilters);
|
|
|
|
@override
|
|
Future<bool> updateUTXOs() async {
|
|
// do nothing for nano based coins
|
|
return false;
|
|
}
|
|
|
|
@override
|
|
// nano has no fees
|
|
Future<Amount> estimateFeeFor(Amount amount, int feeRate) async => Amount(
|
|
rawValue: BigInt.from(0),
|
|
fractionDigits: cryptoCurrency.fractionDigits,
|
|
);
|
|
|
|
@override
|
|
// nano has no fees
|
|
Future<FeeObject> get fees async => FeeObject(
|
|
numberOfBlocksFast: 1,
|
|
numberOfBlocksAverage: 1,
|
|
numberOfBlocksSlow: 1,
|
|
fast: 0,
|
|
medium: 0,
|
|
slow: 0,
|
|
);
|
|
}
|