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Merge branch 'manage-zero-chain-height' into testing

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This commit is contained in:
sneurlax 2024-02-14 15:23:47 -06:00
commit cfcfde7e04
1 changed files with 86 additions and 81 deletions
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167
lib/wallets/wallet/wallet_mixin_interfaces/electrumx_interface.dart
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@ -5,6 +5,7 @@ import 'package:bip47/src/util.dart';
import 'package:bitcoindart/bitcoindart.dart' as bitcoindart;
import 'package:coinlib_flutter/coinlib_flutter.dart' as coinlib;
import 'package:isar/isar.dart';
import 'package:mutex/mutex.dart';
import 'package:stackwallet/electrumx_rpc/cached_electrumx_client.dart';
import 'package:stackwallet/electrumx_rpc/electrumx_chain_height_service.dart';
import 'package:stackwallet/electrumx_rpc/electrumx_client.dart';
@ -824,33 +825,35 @@ mixin ElectrumXInterface<T extends Bip39HDCurrency> on Bip39HDWallet<T> {
}
}
// Mutex to control subscription management access.
static final Mutex _subMutex = Mutex();
Future<void> _manageChainHeightSubscription() async {
// Set the timeout period for the chain height subscription.
const timeout = Duration(seconds: 10);
await _subMutex.protect(() async {
// Set the timeout period for the chain height subscription.
const timeout = Duration(seconds: 10);
if (ElectrumxChainHeightService.subscriptions[cryptoCurrency.coin] ==
null) {
// No subscription exists for this coin yet, so create one.
//
// Set up to wait for the first response.
final Completer<int> completer = Completer<int>();
ElectrumxChainHeightService.completers[cryptoCurrency.coin] ??= completer;
// Make sure we only complete once.
final isFirstResponse = _latestHeight == null;
// Subscribe to block headers.
final subscription =
subscribableElectrumXClient.subscribeToBlockHeaders();
// Set the time the subscription was created.
final subscriptionCreationTime = DateTime.now();
ElectrumxChainHeightService.timeStarted[cryptoCurrency.coin] =
subscriptionCreationTime;
// Doublecheck to avoid race condition.
if (ElectrumxChainHeightService.subscriptions[cryptoCurrency.coin] ==
null) {
// No subscription exists for this coin yet, so create one.
//
// Set up to wait for the first response.
final Completer<int> completer = Completer<int>();
ElectrumxChainHeightService.completers[cryptoCurrency.coin] ??=
completer;
// Make sure we only complete once.
final isFirstResponse = _latestHeight == null;
// Subscribe to block headers.
final subscription =
subscribableElectrumXClient.subscribeToBlockHeaders();
// Set the time the subscription was created.
final subscriptionCreationTime = DateTime.now();
ElectrumxChainHeightService.timeStarted[cryptoCurrency.coin] =
subscriptionCreationTime;
// Set stream subscription.
ElectrumxChainHeightService.subscriptions[cryptoCurrency.coin] =
subscription.responseStream.asBroadcastStream().listen((event) {
@ -880,77 +883,79 @@ mixin ElectrumXInterface<T extends Bip39HDCurrency> on Bip39HDWallet<T> {
}
});
}
}
// A subscription already exists.
//
// Resume the stream subscription if it's paused.
if (ElectrumxChainHeightService
.subscriptions[cryptoCurrency.coin]!.isPaused) {
// If it's paused, resume it.
ElectrumxChainHeightService.subscriptions[cryptoCurrency.coin]!.resume();
}
// A subscription already exists.
//
// Resume the stream subscription if it's paused.
if (ElectrumxChainHeightService
.subscriptions[cryptoCurrency.coin]!.isPaused) {
// If it's paused, resume it.
ElectrumxChainHeightService.subscriptions[cryptoCurrency.coin]!
.resume();
}
// Causes synchronization to stall.
// // Check if the stream subscription is active by pinging it.
// if (!(await subscribableElectrumXClient.ping())) {
// // If it's not active, reconnect it.
// final node = await getCurrentElectrumXNode();
//
// await subscribableElectrumXClient.connect(
// host: node.address, port: node.port);
//
// // Wait for first response.
// return completer.future;
// }
// Causes synchronization to stall.
// // Check if the stream subscription is active by pinging it.
// if (!(await subscribableElectrumXClient.ping())) {
// // If it's not active, reconnect it.
// final node = await getCurrentElectrumXNode();
//
// await subscribableElectrumXClient.connect(
// host: node.address, port: node.port);
//
// // Wait for first response.
// return completer.future;
// }
// If there's no completer set for this coin, something's gone wrong.
//
// The completer is always set before the subscription, so this should
// never happen.
if (ElectrumxChainHeightService.completers[cryptoCurrency.coin] == null) {
// Clear this coin's subscription.
await ElectrumxChainHeightService.subscriptions[cryptoCurrency.coin]!
.cancel();
ElectrumxChainHeightService.subscriptions[cryptoCurrency.coin] = null;
// Retry/recurse.
return await _manageChainHeightSubscription();
}
// Check if the subscription has been running for too long.
if (ElectrumxChainHeightService.timeStarted[cryptoCurrency.coin] != null) {
final timeRunning = DateTime.now().difference(
ElectrumxChainHeightService.timeStarted[cryptoCurrency.coin]!);
// Cancel and retry if we've been waiting too long.
if (timeRunning > timeout) {
// If there's no completer set for this coin, something's gone wrong.
//
// The completer is always set before the subscription, so this should
// never happen.
if (ElectrumxChainHeightService.completers[cryptoCurrency.coin] == null) {
// Clear this coin's subscription.
await ElectrumxChainHeightService.subscriptions[cryptoCurrency.coin]!
.cancel();
ElectrumxChainHeightService.subscriptions[cryptoCurrency.coin] = null;
// Clear this coin's completer.
ElectrumxChainHeightService.completers[cryptoCurrency.coin]
?.completeError(
Exception(
"Subscription to block headers has been running for too long",
),
);
ElectrumxChainHeightService.completers[cryptoCurrency.coin] = null;
// Reset time started.
ElectrumxChainHeightService.timeStarted[cryptoCurrency.coin] = null;
// Retry/recurse.
return await _manageChainHeightSubscription();
}
}
// Wait for the first response.
_latestHeight = await ElectrumxChainHeightService
.completers[cryptoCurrency.coin]!.future;
// Check if the subscription has been running for too long.
if (ElectrumxChainHeightService.timeStarted[cryptoCurrency.coin] !=
null) {
final timeRunning = DateTime.now().difference(
ElectrumxChainHeightService.timeStarted[cryptoCurrency.coin]!);
// Cancel and retry if we've been waiting too long.
if (timeRunning > timeout) {
// Clear this coin's subscription.
await ElectrumxChainHeightService.subscriptions[cryptoCurrency.coin]!
.cancel();
ElectrumxChainHeightService.subscriptions[cryptoCurrency.coin] = null;
return;
// Clear this coin's completer.
ElectrumxChainHeightService.completers[cryptoCurrency.coin]
?.completeError(
Exception(
"Subscription to block headers has been running for too long",
),
);
ElectrumxChainHeightService.completers[cryptoCurrency.coin] = null;
// Reset time started.
ElectrumxChainHeightService.timeStarted[cryptoCurrency.coin] = null;
// Retry/recurse.
return await _manageChainHeightSubscription();
}
}
// Wait for the first response.
_latestHeight = await ElectrumxChainHeightService
.completers[cryptoCurrency.coin]!.future;
return;
});
}
Future<int> fetchTxCount({required String addressScriptHash}) async {