| 1 | // create offset wallets for T address rotation. |
| 2 | // Each address is considered one time use, if it receives less than 15000 zatoshi balance will be essentially burned. |
| 3 | // |
| 4 | // This class takes address index as constructor, and will create 10 addresses by default, if any of the addresses gets used |
| 5 | // it will be moved out of the pool |
| 6 | // |
| 7 | // T addresses are generated by creating new wallets with an extra seed word (or appending to "passphrase") the following |
| 8 | // :tgen:${CRC32(seed)} |
| 9 | // It is highly unlikely for users to create a wallet with that specific last word and add index to it |
| 10 | // We could leverage other fields such as native account index alone, but users may want to set that in future |
| 11 | // This solution is rather simple and if standard would get estabilished for this purpose it can be easily |
| 12 | // turned off and replaced with proper solution. |
| 13 | |
| 14 | import 'dart:async'; |
| 15 | import 'dart:math' show max; |
| 16 | |
| 17 | import 'package:cw_core/sync_status.dart'; |
| 18 | import 'package:cw_core/transaction_direction.dart'; |
| 19 | import 'package:cw_core/utils/print_verbose.dart'; |
| 20 | import 'package:cw_zcash/src/util/crc32.dart'; |
| 21 | import 'package:cw_zcash/src/zcash_wallet.dart'; |
| 22 | import 'package:cw_zcash/src/zcash_wallet_service.dart'; |
| 23 | import 'package:cw_zcash/src/zkool_compat.dart'; |
| 24 | import 'package:cw_zcash/src/zkooltx.dart'; |
| 25 | import 'package:zkool/src/rust/api/account.dart' as zkool_account; |
| 26 | import 'package:zkool/src/rust/api/coin.dart' as zkool_coin; |
| 27 | import 'package:zkool/src/rust/api/sync.dart' as zkool_sync; |
| 28 | import 'package:zkool/src/rust/api/pay.dart' as zkool_pay; |
| 29 | import 'package:zkool/src/rust/api/network.dart' as zkool_network; |
| 30 | import 'package:zkool/src/rust/api/sweep.dart' as zkool_sweep; |
| 31 | import 'package:zkool/src/rust/pay.dart' as zkool_paydart; |
| 32 | |
| 33 | class ZcashTaddressRotation { |
| 34 | static bool _isStarted = false; |
| 35 | static zkool_coin.Coin get c => ZcashWalletBase.c; |
| 36 | static const int _sweepThreshold = 30000; |
| 37 | static const int minSpendableNote = 5000; |
| 38 | static const int _lookahead = 5; |
| 39 | // Matches transparentLimit in ZcashWalletBase._oneshotSync. |
| 40 | static const int _transparentSyncLimit = 100; |
| 41 | |
| 42 | static zkool_account.Seed seedForOffset(final zkool_account.Seed seed) { |
| 43 | final seedStr = "${seed.mnemonic} ${seed.phrase.replaceAll(" ", "_")}".trim(); |
| 44 | final seedWords = seedStr.split(" "); |
| 45 | if ([12, 24].contains(seedWords.length)) { |
| 46 | seedWords.add(""); |
| 47 | } |
| 48 | final lastI = seedWords.length - 1; |
| 49 | final crc = CRC32.compute(seedStr); |
| 50 | seedWords[lastI] += ":tgen:$crc"; |
| 51 | final phrase = seedWords.removeLast(); |
| 52 | return zkool_account.Seed(mnemonic: seedWords.join(" "), phrase: phrase, aindex: 0); |
| 53 | } |
| 54 | |
| 55 | static bool zkoolAccountSeedIsEqual(final zkool_account.Seed a, final zkool_account.Seed b) { |
| 56 | return a.mnemonic == b.mnemonic && a.phrase == b.phrase; |
| 57 | } |
| 58 | |
| 59 | static bool isSeedForWallet( |
| 60 | final zkool_account.Seed? mainWallet, |
| 61 | final zkool_account.Seed? subWallet, |
| 62 | ) { |
| 63 | if (mainWallet == null || subWallet == null) return false; |
| 64 | return zkoolAccountSeedIsEqual(seedForOffset(mainWallet), subWallet); |
| 65 | } |
| 66 | |
| 67 | static Map<int, List<ZkoolTx>> shieldedAccountsTx = {}; |
| 68 | static final Map<int, int> _rotationAccountByMain = {}; |
| 69 | static final Set<int> _resyncedRotationAccounts = {}; |
| 70 | static final Set<String> _poolRescanAttempted = {}; |
| 71 | static bool _sweepJobRunning = false; |
| 72 | static final Map<int, DateTime> _lastSweepBroadcastAt = {}; |
| 73 | |
| 74 | static bool _poolNeedsRescan(final List<zkool_account.TAddressTxCount> slots) { |
| 75 | if (slots.isEmpty) { |
| 76 | return false; |
| 77 | } |
| 78 | final unused = slots.where((final e) => e.txCount == 0); |
| 79 | if (unused.isEmpty) { |
| 80 | return false; |
| 81 | } |
| 82 | final head = unused.first; |
| 83 | final tail = slots.last.dindex; |
| 84 | if (slots.any((final e) => e.dindex > head.dindex && e.txCount > 0)) { |
| 85 | return true; |
| 86 | } |
| 87 | return head.dindex + _transparentSyncLimit <= tail; |
| 88 | } |
| 89 | |
| 90 | static Future<void> _scanTransparentChain(final int rotationAccountId) async { |
| 91 | await ZcashWalletBase.runWithCoin( |
| 92 | accountId: rotationAccountId, |
| 93 | func: (final coin) async { |
| 94 | final all = await zkool_account.fetchAddressTxCount( |
| 95 | c: coin, |
| 96 | aggregate: false, |
| 97 | poolFilter: 1, |
| 98 | ); |
| 99 | final external = all.where((final e) => e.scope == 0).toList(); |
| 100 | if (external.isEmpty) { |
| 101 | return; |
| 102 | } |
| 103 | final maxD = external.map((final e) => e.dindex).reduce(max); |
| 104 | final scanner = await zkool_sweep.TransparentScanner.newInstance(); |
| 105 | final height = await zkool_network.getCurrentHeight(c: coin); |
| 106 | final completer = Completer<void>(); |
| 107 | final sub = scanner |
| 108 | .run(endHeight: height, gapLimit: maxD + _lookahead + 1, c: coin) |
| 109 | .listen( |
| 110 | (_) {}, |
| 111 | onError: (final e) { |
| 112 | printV("transparent chain scan: $e"); |
| 113 | if (!completer.isCompleted) { |
| 114 | completer.complete(); |
| 115 | } |
| 116 | }, |
| 117 | onDone: () { |
| 118 | if (!completer.isCompleted) { |
| 119 | completer.complete(); |
| 120 | } |
| 121 | }, |
| 122 | ); |
| 123 | await Future.any([ |
| 124 | completer.future, |
| 125 | Future.delayed(Duration(seconds: (maxD + 2).clamp(8, 45))), |
| 126 | ]); |
| 127 | await sub.cancel(); |
| 128 | }, |
| 129 | ); |
| 130 | } |
| 131 | |
| 132 | static Future<void> _resyncRotationPool( |
| 133 | final int rotationAccountId, |
| 134 | final int transparentLimit, |
| 135 | ) async { |
| 136 | await ZcashWalletBase.runWithCoin( |
| 137 | accountId: rotationAccountId, |
| 138 | func: (final coin) async { |
| 139 | await zkool_sync.cancelSync(); |
| 140 | await zkool_account.resetSync(id: rotationAccountId, c: coin); |
| 141 | final height = await zkool_network.getCurrentHeight(c: coin); |
| 142 | final sync = zkool_sync.synchronize( |
| 143 | accounts: [rotationAccountId], |
| 144 | currentHeight: height, |
| 145 | actionsPerSync: 10000, |
| 146 | transparentLimit: transparentLimit, |
| 147 | checkpointAge: 200, |
| 148 | c: coin, |
| 149 | fast: false, |
| 150 | ); |
| 151 | final completer = Completer<void>(); |
| 152 | sync.listen( |
| 153 | (_) {}, |
| 154 | onError: (final e) { |
| 155 | printV("rotation pool resync error: $e"); |
| 156 | if (!completer.isCompleted) { |
| 157 | completer.complete(); |
| 158 | } |
| 159 | }, |
| 160 | onDone: () { |
| 161 | if (!completer.isCompleted) { |
| 162 | completer.complete(); |
| 163 | } |
| 164 | }, |
| 165 | ); |
| 166 | await completer.future; |
| 167 | }, |
| 168 | ); |
| 169 | } |
| 170 | |
| 171 | static Future<void> _ensurePoolScanned(final int rotationAccountId) async { |
| 172 | var slots = await _transparentSlots(rotationAccountId); |
| 173 | final firstSession = _resyncedRotationAccounts.add(rotationAccountId); |
| 174 | if (!firstSession && !_poolNeedsRescan(slots)) { |
| 175 | return; |
| 176 | } |
| 177 | if (!firstSession) { |
| 178 | final head = slots.where((final e) => e.txCount == 0).firstOrNull?.dindex; |
| 179 | final key = '$rotationAccountId:$head'; |
| 180 | if (_poolRescanAttempted.contains(key)) { |
| 181 | return; |
| 182 | } |
| 183 | _poolRescanAttempted.add(key); |
| 184 | } |
| 185 | await _ensureLookahead(rotationAccountId); |
| 186 | await _scanTransparentChain(rotationAccountId); |
| 187 | slots = await _transparentSlots(rotationAccountId); |
| 188 | final limit = slots.isEmpty ? _transparentSyncLimit : slots.last.dindex + 1; |
| 189 | printV("rotation pool resync account $rotationAccountId limit $limit"); |
| 190 | await _resyncRotationPool(rotationAccountId, limit); |
| 191 | } |
| 192 | |
| 193 | static Future<void> init() async { |
| 194 | if (_isStarted) { |
| 195 | return; |
| 196 | } |
| 197 | _isStarted = true; |
| 198 | unawaited( |
| 199 | (() async { |
| 200 | await Future.delayed(const Duration(seconds: 2)); |
| 201 | return _jobRunner(); |
| 202 | })(), |
| 203 | ); |
| 204 | } |
| 205 | |
| 206 | static Future<int?> getRotationAccountForMainAccount(final int mainAccountId) async { |
| 207 | final cached = _rotationAccountByMain[mainAccountId]; |
| 208 | if (cached != null) { |
| 209 | return cached; |
| 210 | } |
| 211 | try { |
| 212 | await ZcashWalletBase.runWithCoinMutex.acquire(); |
| 213 | final wSeed = await zkool_account.getAccountSeed(c: c, account: mainAccountId); |
| 214 | if (wSeed == null) { |
| 215 | printV("Not running Taddr rotation - seed not found"); |
| 216 | return null; |
| 217 | } |
| 218 | final seed = seedForOffset(wSeed); |
| 219 | final accs = await zkool_account.listAccounts(c: c); |
| 220 | for (int i = 0; i < accs.length; i++) { |
| 221 | final accSeed = await zkool_account.getAccountSeed(c: c, account: accs[i].id); |
| 222 | if (accSeed?.mnemonic == seed.mnemonic && |
| 223 | accSeed?.phrase == seed.phrase && |
| 224 | accSeed?.aindex == seed.aindex) { |
| 225 | _rotationAccountByMain[mainAccountId] = accs[i].id; |
| 226 | return accs[i].id; |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | zkool_account.Account? acc; |
| 231 | for (final a in accs) { |
| 232 | if (a.id == mainAccountId) { |
| 233 | acc = a; |
| 234 | break; |
| 235 | } |
| 236 | } |
| 237 | if (acc == null) { |
| 238 | printV("Main account $mainAccountId not found for Taddr rotation"); |
| 239 | return null; |
| 240 | } |
| 241 | |
| 242 | final name = CRC32.compute(wSeed.mnemonic).toString(); |
| 243 | final id = await newAccount( |
| 244 | name: name, |
| 245 | seed: seed.mnemonic, |
| 246 | passphrase: seed.phrase, |
| 247 | height: acc.birth, |
| 248 | aindex: seed.aindex, |
| 249 | ); |
| 250 | _rotationAccountByMain[mainAccountId] = id; |
| 251 | return id; |
| 252 | } finally { |
| 253 | ZcashWalletBase.runWithCoinMutex.release(); |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | // External (scope 0) transparent slots for the rotation account, ordered by |
| 258 | // dindex. zkool derives every slot in 0..=dindex, so unused ones (txCount==0) |
| 259 | // form the disposable look-ahead pool. |
| 260 | static Future<List<zkool_account.TAddressTxCount>> _transparentSlots( |
| 261 | final int rotationAccountId, |
| 262 | ) async { |
| 263 | final all = await ZcashWalletBase.runWithCoin( |
| 264 | accountId: rotationAccountId, |
| 265 | func: (final coin) => |
| 266 | zkool_account.fetchAddressTxCount(c: coin, aggregate: false, poolFilter: 1), |
| 267 | ); |
| 268 | return all.where((final e) => e.scope == 0).toList() |
| 269 | ..sort((final a, final b) => a.dindex.compareTo(b.dindex)); |
| 270 | } |
| 271 | |
| 272 | // Keep _lookahead unused disposable addresses ready, generating more whenever |
| 273 | // the pool runs low. Newly generated addresses are scanned by ongoing sync |
| 274 | // (the latest addresses are always in the scan window), so no resync needed. |
| 275 | static Future<void> _ensureLookahead(final int rotationAccountId) async { |
| 276 | final slots = await _transparentSlots(rotationAccountId); |
| 277 | final unused = slots.where((final e) => e.txCount == 0).length; |
| 278 | final toGenerate = _lookahead - unused; |
| 279 | for (var i = 0; i < toGenerate; i++) { |
| 280 | await ZcashWalletBase.runWithCoin( |
| 281 | accountId: rotationAccountId, |
| 282 | func: (final coin) => zkool_account.generateNextDindex(c: coin), |
| 283 | ); |
| 284 | } |
| 285 | if (toGenerate > 0) { |
| 286 | printV("topped up disposable taddr pool by $toGenerate (had $unused)"); |
| 287 | } |
| 288 | } |
| 289 | |
| 290 | static bool _isWalletSynced(final int mainAccountId) { |
| 291 | final wallet = ZcashWalletBase.walletsByAccountId[mainAccountId]; |
| 292 | return wallet != null && wallet.syncStatus is SyncedSyncStatus; |
| 293 | } |
| 294 | |
| 295 | static Future<BigInt> _rotationTransparentBalance(final int rotationAccount) async { |
| 296 | return ZcashWalletBase.runWithCoin( |
| 297 | accountId: rotationAccount, |
| 298 | func: (final coin) async { |
| 299 | final b = await zkool_sync.balance(c: coin); |
| 300 | return b.field0.elementAt(0); |
| 301 | }, |
| 302 | ); |
| 303 | } |
| 304 | |
| 305 | static Future<List<ZkoolTx>> _loadTxHistory(final int accountId) async { |
| 306 | return ZcashWalletBase.runWithCoin( |
| 307 | accountId: accountId, |
| 308 | func: (final coin) async { |
| 309 | final txsI = await zkool_account.listTxHistory(c: coin); |
| 310 | final txs = <ZkoolTx>[]; |
| 311 | for (int i = 0; i < txsI.length; i++) { |
| 312 | final tx = txsI[i]; |
| 313 | try { |
| 314 | final details = await zkool_account.getTxDetails(idTx: tx.id, c: coin); |
| 315 | txs.add(ZkoolTx(tx, details)); |
| 316 | } catch (e) { |
| 317 | printV("getTxDetails skipped for tx ${tx.id}: $e"); |
| 318 | } |
| 319 | } |
| 320 | return txs; |
| 321 | }, |
| 322 | ); |
| 323 | } |
| 324 | |
| 325 | static bool _canBroadcastSweep(final int mainAccountId) { |
| 326 | final lastSweep = _lastSweepBroadcastAt[mainAccountId]; |
| 327 | if (lastSweep == null) { |
| 328 | return true; |
| 329 | } |
| 330 | return !lastSweep.isAfter(DateTime.now().subtract(const Duration(seconds: 120))); |
| 331 | } |
| 332 | |
| 333 | static Future<void> createAndSweepTAddresses() async { |
| 334 | if (_sweepJobRunning) { |
| 335 | return; |
| 336 | } |
| 337 | _sweepJobRunning = true; |
| 338 | try { |
| 339 | final mainAccountIds = ZcashWalletBase.walletsByAccountId.keys.toList(); |
| 340 | if (mainAccountIds.isEmpty) { |
| 341 | await createAndSweepTAddressesForAccount(c.account); |
| 342 | return; |
| 343 | } |
| 344 | for (final mainAccountId in mainAccountIds) { |
| 345 | try { |
| 346 | await createAndSweepTAddressesForAccount(mainAccountId); |
| 347 | } catch (e, s) { |
| 348 | printV("createAndSweepTAddresses for $mainAccountId error: $e"); |
| 349 | s.toString().split("\n").forEach(printV); |
| 350 | } |
| 351 | } |
| 352 | } finally { |
| 353 | _sweepJobRunning = false; |
| 354 | } |
| 355 | } |
| 356 | |
| 357 | static Future<void> createAndSweepTAddressesForAccount(final int cId) async { |
| 358 | if (!_isWalletSynced(cId)) { |
| 359 | printV("rotation sweep waiting for wallet sync (account $cId)"); |
| 360 | return; |
| 361 | } |
| 362 | |
| 363 | printV("createAndSweepTAddresses for account $cId"); |
| 364 | |
| 365 | final rotationAccount = await getRotationAccountForMainAccount(cId); |
| 366 | if (rotationAccount == null) { |
| 367 | printV("rotation account is null, bailing out"); |
| 368 | return; |
| 369 | } |
| 370 | |
| 371 | await _ensureLookahead(rotationAccount); |
| 372 | await _ensurePoolScanned(rotationAccount); |
| 373 | await _refreshWalletAddresses(cId); |
| 374 | |
| 375 | BigInt transparentBal = BigInt.zero; |
| 376 | try { |
| 377 | transparentBal = await _rotationTransparentBalance(rotationAccount); |
| 378 | printV("rotation account $rotationAccount transparent balance: $transparentBal"); |
| 379 | } catch (e) { |
| 380 | printV("getTBalance: $e"); |
| 381 | return; |
| 382 | } |
| 383 | |
| 384 | if (transparentBal < BigInt.from(_sweepThreshold)) { |
| 385 | await updateCache(mainAccountId: cId); |
| 386 | await _refreshWalletAfterRotationChange(cId); |
| 387 | return; |
| 388 | } |
| 389 | |
| 390 | if (!_canBroadcastSweep(cId)) { |
| 391 | printV("rotation sweep rate-limited for account $cId"); |
| 392 | await updateCache(mainAccountId: cId); |
| 393 | await _refreshWalletAfterRotationChange(cId); |
| 394 | return; |
| 395 | } |
| 396 | |
| 397 | final toAddress = await ZcashWalletBase.runWithCoin( |
| 398 | accountId: cId, |
| 399 | func: (final coin) async { |
| 400 | final addrs = await zkool_account.getAddresses(c: coin, uaPools: 7); |
| 401 | final orchard = addrs.oaddr; |
| 402 | if (orchard == null || orchard.isEmpty) { |
| 403 | throw Exception('Orchard address unavailable for rotation sweep'); |
| 404 | } |
| 405 | return orchard; |
| 406 | }, |
| 407 | ); |
| 408 | final result = await ZcashWalletBase.runWithCoin( |
| 409 | accountId: rotationAccount, |
| 410 | func: (final coin) async { |
| 411 | final height = await zkool_network.getCurrentHeight(c: coin); |
| 412 | final notes = await zkool_account.listNotes(c: coin); |
| 413 | var amount = BigInt.zero; |
| 414 | for (final note in notes) { |
| 415 | if (note.pool != NotePool.transparent.index || note.locked) { |
| 416 | continue; |
| 417 | } |
| 418 | if (note.value < BigInt.from(minSpendableNote)) { |
| 419 | continue; |
| 420 | } |
| 421 | if (note.height > height) { |
| 422 | continue; |
| 423 | } |
| 424 | amount += note.value; |
| 425 | } |
| 426 | if (amount < BigInt.from(_sweepThreshold)) { |
| 427 | throw Exception('rotation sweep: insufficient spendable transparent notes'); |
| 428 | } |
| 429 | final ironwood = await zkool_network.isIronwoodActive(c: coin); |
| 430 | final tx = await zkool_pay.prepare( |
| 431 | recipients: [ |
| 432 | zkool_paydart.Recipient( |
| 433 | assetBase: zecBase, |
| 434 | address: toAddress, |
| 435 | amount: amount, |
| 436 | pools: ironwood ? ironwoodPoolMask : null, |
| 437 | ), |
| 438 | ], |
| 439 | options: zkool_pay.PaymentOptions( |
| 440 | srcPools: 1, |
| 441 | recipientPaysFee: true, |
| 442 | smartTransparent: false, |
| 443 | mode: 0, |
| 444 | ), |
| 445 | c: coin, |
| 446 | ); |
| 447 | final signTx = await zkool_pay.signTransaction(pczt: tx, c: coin); |
| 448 | final txBytes = await zkool_pay.extractTransaction(package: signTx); |
| 449 | return zkool_pay.broadcastTransaction(height: height, txBytes: txBytes, c: coin); |
| 450 | }, |
| 451 | ); |
| 452 | printV("rotation sweep broadcast: $result"); |
| 453 | if (result.isEmpty) { |
| 454 | throw Exception("rotation sweep broadcast failed"); |
| 455 | } |
| 456 | |
| 457 | await ZcashWalletService.addShieldedTx(result); |
| 458 | _lastSweepBroadcastAt[cId] = DateTime.now(); |
| 459 | await updateCache(mainAccountId: cId); |
| 460 | await _refreshWalletAfterRotationChange(cId); |
| 461 | } |
| 462 | |
| 463 | static Future<void> _refreshWalletAfterRotationChange(final int mainAccountId) async { |
| 464 | final wallet = ZcashWalletBase.walletsByAccountId[mainAccountId]; |
| 465 | if (wallet == null) { |
| 466 | return; |
| 467 | } |
| 468 | unawaited(wallet.updateTransactions()); |
| 469 | unawaited(wallet.updateBalance()); |
| 470 | } |
| 471 | |
| 472 | static Future<void> updateCache({required final int mainAccountId}) async { |
| 473 | final rotationAccount = await getRotationAccountForMainAccount(mainAccountId); |
| 474 | if (rotationAccount == null) { |
| 475 | printV("rotationAccount is null"); |
| 476 | return; |
| 477 | } |
| 478 | await _ensureLookahead(rotationAccount); |
| 479 | await _ensurePoolScanned(rotationAccount); |
| 480 | final txs = await _loadTxHistory(rotationAccount); |
| 481 | shieldedAccountsTx[mainAccountId] = txs; |
| 482 | if (mainAccountId != rotationAccount && shieldedAccountsTx.containsKey(rotationAccount)) { |
| 483 | shieldedAccountsTx.remove(rotationAccount); |
| 484 | } |
| 485 | |
| 486 | for (final tx in shieldedAccountsTx[mainAccountId]!) { |
| 487 | if (tx.direction == TransactionDirection.outgoing) { |
| 488 | await ZcashWalletService.addShieldedTx(tx.txHash); |
| 489 | } |
| 490 | } |
| 491 | await _refreshWalletAddresses(mainAccountId); |
| 492 | await _refreshWalletAfterRotationChange(mainAccountId); |
| 493 | } |
| 494 | |
| 495 | static Future<void> _refreshWalletAddresses(final int mainAccountId) async { |
| 496 | final wallet = ZcashWalletBase.walletsByAccountId[mainAccountId]; |
| 497 | if (wallet == null) { |
| 498 | return; |
| 499 | } |
| 500 | try { |
| 501 | await wallet.walletAddresses.refreshRotationAddresses(); |
| 502 | } catch (e) { |
| 503 | printV("rotation address refresh: $e"); |
| 504 | } |
| 505 | } |
| 506 | |
| 507 | static List<ZkoolTx> rotationTxsForMainAccount(final int mainAccountId) { |
| 508 | return shieldedAccountsTx[mainAccountId] ?? const []; |
| 509 | } |
| 510 | |
| 511 | static Future<zkool_account.Account?> accountForSeed(final zkool_account.Seed seed) async { |
| 512 | final accounts = await zkool_account.listAccounts(c: c); |
| 513 | if (accounts.isEmpty) return null; |
| 514 | for (int i = 0; i < accounts.length; i++) { |
| 515 | final acc = accounts[i]; |
| 516 | final backup = await zkool_account.getAccountSeed(c: c, account: acc.id); |
| 517 | if (backup?.mnemonic == seed.mnemonic && backup?.phrase == seed.phrase) { |
| 518 | return acc; |
| 519 | } |
| 520 | } |
| 521 | return null; |
| 522 | } |
| 523 | |
| 524 | static Future<void> _jobRunner() async { |
| 525 | for (;;) { |
| 526 | try { |
| 527 | await Future.delayed(const Duration(seconds: 5)); |
| 528 | await createAndSweepTAddresses(); |
| 529 | } catch (e, s) { |
| 530 | printV("createAndSweepTAddresses error: $e"); |
| 531 | s.toString().split("\n").forEach(printV); |
| 532 | } finally { |
| 533 | await Future.delayed(const Duration(seconds: 30)); |
| 534 | } |
| 535 | } |
| 536 | } |
| 537 | |
| 538 | // Current disposable address = first unused slot (lowest dindex). |
| 539 | static Future<String?> addressForAccount(final int accountId) async { |
| 540 | final rotationAccount = await getRotationAccountForMainAccount(accountId); |
| 541 | if (rotationAccount == null) { |
| 542 | return null; |
| 543 | } |
| 544 | final slots = await _transparentSlots(rotationAccount); |
| 545 | final unused = slots.where((final e) => e.txCount == 0); |
| 546 | if (unused.isNotEmpty) { |
| 547 | return unused.first.address; |
| 548 | } |
| 549 | return slots.isNotEmpty ? slots.last.address : null; |
| 550 | } |
| 551 | |
| 552 | static Future<List<String>> usedAddressesForAccount(final int accountId) async { |
| 553 | final rotationAccount = await getRotationAccountForMainAccount(accountId); |
| 554 | if (rotationAccount == null) { |
| 555 | return const []; |
| 556 | } |
| 557 | final slots = await _transparentSlots(rotationAccount); |
| 558 | return [ |
| 559 | for (final entry in slots) |
| 560 | if (entry.txCount > 0) entry.address, |
| 561 | ]; |
| 562 | } |
| 563 | |
| 564 | // The full disposable pool: used slots plus the unused look-ahead window. |
| 565 | static Future<List<String>> allAddressesForAccount(final int accountId) async { |
| 566 | final rotationAccount = await getRotationAccountForMainAccount(accountId); |
| 567 | if (rotationAccount == null) { |
| 568 | return const []; |
| 569 | } |
| 570 | final slots = await _transparentSlots(rotationAccount); |
| 571 | return slots.map((final e) => e.address).toList(); |
| 572 | } |
| 573 | |
| 574 | static Future<int> newAccount({ |
| 575 | required final String name, |
| 576 | required final String seed, |
| 577 | required final String passphrase, |
| 578 | required final int height, |
| 579 | required final int aindex, |
| 580 | }) async { |
| 581 | final id = await zkool_account.newAccount( |
| 582 | na: zkool_account.NewAccount( |
| 583 | name: name, |
| 584 | restore: true, |
| 585 | passphrase: passphrase, |
| 586 | key: seed, |
| 587 | aindex: aindex, |
| 588 | birth: height, |
| 589 | folder: '', |
| 590 | pools: 1, |
| 591 | useInternal: true, |
| 592 | internal: false, |
| 593 | ledger: false, |
| 594 | ), |
| 595 | c: c, |
| 596 | ); |
| 597 | return id; |
| 598 | } |
| 599 | } |