mirror of
https://github.com/cculianu/Fulcrum.git
synced 2026-08-15 12:50:49 +02:00
6df916565a
Also in this commit various nits and subtle bugs prevented. Refactored the 'Stats' mechanism to return a generic QVariant rather than QVariantMap, which is more flexible. Misc. other nits.
587 lines
23 KiB
C++
587 lines
23 KiB
C++
#include "BTC.h"
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#include "Controller.h"
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#include <cassert>
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#include <iterator>
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#include <list>
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#include <map>
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Controller::Controller(const std::shared_ptr<Options> &o)
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: Mgr(nullptr), options(o)
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{
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setObjectName("Controller");
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_thread.setObjectName(objectName());
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}
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Controller::~Controller() { Debug("%s", __FUNCTION__); cleanup(); }
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void Controller::startup()
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{
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bitcoindmgr = std::make_unique<BitcoinDMgr>(options->bitcoind.first, options->bitcoind.second, options->rpcuser, options->rpcpassword);
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{
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// some setup code that waits for bitcoind to be ready before kicking off our "process" method
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auto waitForBitcoinD = [this] {
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auto constexpr waitTimer = "wait4bitcoind", callProcessTimer = "callProcess";
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int constexpr msgPeriod = 10000, // 10sec
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smallDelay = 100;
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stopTimer(pollTimerName);
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stopTimer(callProcessTimer);
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callOnTimerSoon(msgPeriod, waitTimer, []{ Log("Waiting for bitcoind..."); return true; }, false, Qt::TimerType::VeryCoarseTimer);
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// connection to kick off our 'process' method once the first auth is received
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auto connPtr = std::make_shared<QMetaObject::Connection>();
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*connPtr = connect(bitcoindmgr.get(), &BitcoinDMgr::gotFirstGoodConnection, this, [this, connPtr](quint64 id) mutable {
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if (connPtr) {
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stopTimer(waitTimer);
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if (!disconnect(*connPtr)) Fatal() << "Failed to disconnect 'authenticated' signal! FIXME!"; // this should never happen but if it does, app quits.
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connPtr.reset(); // clear connPtr right away to 1. delte it asap and 2. so we are guaranteed not to reenter this block for this connection should there be a spurious signal emitted.
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Debug() << "Auth recvd from bicoind with id: " << id << ", proceeding with processing ...";
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callOnTimerSoonNoRepeat(smallDelay, callProcessTimer, [this]{process();}, true);
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}
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});
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};
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waitForBitcoinD();
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conns += connect(bitcoindmgr.get(), &BitcoinDMgr::allConnectionsLost, this, waitForBitcoinD);
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conns += connect(bitcoindmgr.get(), &BitcoinDMgr::inWarmUp, this, [last = -1.0](const QString &msg) mutable {
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// just print a message to the log as to why we keep dropping conn. -- if bitcoind is still warming up
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auto now = Util::getTimeSecs();
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if (now-last >= 1.0) { // throttled to not spam log
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last = now;
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Log() << "bitcoind is still warming up: " << msg;
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}
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});
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}
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bitcoindmgr->startup(); // may throw
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// We defer listening for connections until we hit the "upToDate" state at least once, to prevent problems
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// for clients.
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connect(this, &Controller::upToDate, this, [this]{
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if (!srvmgr) {
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if (!origThread) {
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Fatal() << "INTERNAL ERROR: Controller's creation thread is null; cannot start SrvMgr, exiting!";
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return;
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}
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srvmgr = std::make_unique<SrvMgr>(options->interfaces);
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// this object will live on our creation thread (normally the main thread)
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srvmgr->moveToThread(origThread);
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// now, start it up on our creation thread (normally the main thread)
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Util::VoidFuncOnObjectNoThrow(srvmgr.get(), [this]{
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// creation thread (normally the main thread)
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try {
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srvmgr->startup(); // may throw Exception, waits for servers to bind
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} catch (const Exception & e) {
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// exit app on bind/listen failure.
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Fatal() << e.what();
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}
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}); // wait for srvmgr's thread (usually the main thread)
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}
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}, Qt::QueuedConnection);
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start(); // start our thread
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}
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void Controller::cleanup()
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{
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stop();
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if (srvmgr) { Log("Stopping SrvMgr ... "); srvmgr->cleanup(); srvmgr.reset(); }
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if (bitcoindmgr) { Log("Stopping BitcoinDMgr ... "); bitcoindmgr->cleanup(); bitcoindmgr.reset(); }
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sm.reset();
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}
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/// Encapsulates basically the data returned from bitcoind by the getblockchaininfo RPC method.
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/// This has been separated out into its own struct for future use to detect blockchain changes.
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/// TODO: Refactor this out to storage, etc to detect when blockchain changed.
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struct ChainInfo {
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QString toString() const;
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QString chain = "";
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int blocks = 0, headers = -1;
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QByteArray bestBlockhash; ///< decoded bytes
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double difficulty = 0.0;
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int64_t mtp = 0;
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double verificationProgress = 0.0;
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bool initialBlockDownload = false;
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QByteArray chainWork; ///< decoded bytes
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size_t sizeOnDisk = 0;
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bool pruned = false;
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QString warnings;
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};
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struct GetChainInfoTask : public CtlTask
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{
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GetChainInfoTask(Controller *ctl_) : CtlTask(ctl_, "Task.GetChainInfo") {}
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void process() override;
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ChainInfo info;
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};
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void GetChainInfoTask::process()
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{
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submitRequest("getblockchaininfo", {}, [this](const RPC::Message & resp){
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const auto Err = [this, id=resp.id.toInt()](const QString &thing) {
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const auto msg = QString("Failed to parse %1").arg(thing);
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errorCode = id;
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errorMessage = msg;
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throw Exception(msg);
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};
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try {
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bool ok = false;
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const auto map = resp.result().toMap();
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if (map.isEmpty()) Err("response; expected map");
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info.blocks = map.value("blocks").toInt(&ok);
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if (!ok || info.blocks < 0) Err("blocks"); // enforce positive blocks number
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info.chain = map.value("chain").toString();
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if (info.chain.isEmpty()) Err("chain");
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info.headers = map.value("headers").toInt(); // error ignored here
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info.bestBlockhash = Util::ParseHexFast(map.value("bestblockhash").toByteArray());
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if (info.bestBlockhash.size() != bitcoin::uint256::width()) Err("bestblockhash");
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info.difficulty = map.value("difficulty").toDouble(); // error ignored here
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info.mtp = map.value("mediantime").toLongLong(); // error ok
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info.verificationProgress = map.value("verificationprogress").toDouble(); // error ok
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if (auto v = map.value("initialblockdownload"); v.canConvert<bool>())
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info.initialBlockDownload = v.toBool();
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else
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Err("initialblockdownload");
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info.chainWork = Util::ParseHexFast(map.value("chainwork").toByteArray()); // error ok
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info.sizeOnDisk = map.value("size_on_disk").toULongLong(); // error ok
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info.pruned = map.value("pruned").toBool(); // error ok
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info.warnings = map.value("warnings").toString(); // error ok
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if (Trace::isEnabled()) Trace() << info.toString();
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emit success();
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} catch (const Exception & e) {
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Error() << "INTERNAL ERROR: " << e.what();
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emit errored();
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}
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});
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}
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QString ChainInfo::toString() const
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{
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QString ret;
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{
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QTextStream ts(&ret, QIODevice::WriteOnly|QIODevice::Truncate);
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ts << "(ChainInfo"
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<< " chain: \"" << chain << "\""
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<< " blocks: " << blocks
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<< " headers: " << headers
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<< " bestBlockHash: " << bestBlockhash.toHex()
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<< " difficulty: " << QString::number(difficulty, 'f', 9)
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<< " mtp: " << mtp
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<< " verificationProgress: " << QString::number(verificationProgress, 'f', 6)
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<< " ibd: " << initialBlockDownload
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<< " chainWork: " << chainWork.toHex()
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<< " sizeOnDisk: " << sizeOnDisk
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<< " pruned: " << pruned
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<< " warnings: \"" << warnings << "\""
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<< ")";
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}
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return ret;
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}
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struct DownloadHeadersTask : public CtlTask
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{
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DownloadHeadersTask(unsigned from, unsigned to, Controller *ctl);
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void process() override;
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const unsigned from = 0, to = 0;
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unsigned next = 0;
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unsigned goodCt = 0;
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bool maybeDone = false;
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std::vector<QByteArray> headers;
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int q_ct = 0;
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static constexpr int max_q = BitcoinDMgr::N_CLIENTS+1; // todo: tune this
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static const int HEADER_SIZE;
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void do_get(unsigned height);
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// thread safe, this is a rough estimate and not 100% accurate
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size_t nSoFar() const { return size_t(qRound(((to-from)+1) * lastProgress)); }
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};
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/*static*/ const int DownloadHeadersTask::HEADER_SIZE = int(BTC::GetBlockHeaderSize());
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DownloadHeadersTask::DownloadHeadersTask(unsigned from, unsigned to, Controller *ctl_)
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: CtlTask(ctl_, QString("Task.Headers %1 -> %2").arg(from).arg(to)), from(from), to(to)
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{
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assert(to >= from); assert(ctl_);
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next = from;
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headers.reserve((to-from) + 1);
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}
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void DownloadHeadersTask::process()
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{
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if (next > to) {
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if (maybeDone) {
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int bad = 0;
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for (size_t index = 0; index < headers.size(); ++index) {
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if (headers[index].length() != HEADER_SIZE) {
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++bad;
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errorCode = int(index + from); // height
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break;
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}
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}
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if (!bad) {
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emit success();
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} else {
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errorMessage = QString("header length incorrect for height %1").arg(errorCode);
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emit errored();
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}
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}
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return;
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}
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do_get(next++);
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}
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void DownloadHeadersTask::do_get(unsigned int bnum)
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{
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submitRequest("getblockhash", {bnum}, [this, bnum](const RPC::Message & resp){ // testing
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QVariant var = resp.result();
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const auto hash = Util::ParseHexFast(var.toByteArray());
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if (hash.length() == bitcoin::uint256::width()) {
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submitRequest("getblockheader", {var, false}, [this, bnum, hash](const RPC::Message & resp){ // testing
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QVariant var = resp.result();
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const auto header = Util::ParseHexFast(var.toByteArray());
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QByteArray chkHash;
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if (bool sizeOk = header.length() == HEADER_SIZE; sizeOk && (chkHash = BTC::HashRev(header)) == hash) {
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const auto expectedCt = (to-from)+1;
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const size_t index = bnum - from;
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++goodCt;
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q_ct = qMax(q_ct-1, 0);
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if (!(index % 1000) && index) {
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emit progress(double(bnum-from) / double(expectedCt));
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}
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if (Trace::isEnabled()) Trace() << resp.method << ": header for height: " << bnum << " len: " << header.length();
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// save header and hash when both are correct
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if (headers.size() < index+1)
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headers.resize(index+1);
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headers[index] = header;
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if (goodCt >= expectedCt) {
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// flag state to maybeDone to do checks when process() called again
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maybeDone = true;
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AGAIN();
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return;
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}
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while (goodCt + unsigned(q_ct) < expectedCt && q_ct < max_q) {
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// queue multiple at once
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AGAIN();
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++q_ct;
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}
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} else if (!sizeOk) {
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Warning() << resp.method << ": at height " << bnum << " header not valid (decoded size: " << header.length() << ")";
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errorCode = int(bnum);
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errorMessage = QString("bad size for height %1").arg(bnum);
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emit errored();
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} else {
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Warning() << resp.method << ": at height " << bnum << " header not valid (expected hash: " << hash.toHex() << ", got hash: " << chkHash.toHex() << ")";
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errorCode = int(bnum);
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errorMessage = QString("hash mismatch for height %1").arg(bnum);
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emit errored();
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}
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});
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} else {
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Warning() << resp.method << ": at height " << bnum << " hash not valid (decoded size: " << hash.length() << ")";
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errorCode = int(bnum);
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errorMessage = QString("invalid hash for height %1").arg(bnum);
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emit errored();
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}
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});
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}
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struct Controller::StateMachine
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{
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enum State {
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Begin=0, GetBlockHeaders, FinishedDL, End, Failure, IBD
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};
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State state = Begin;
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int ht = -1;
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std::map<unsigned, std::vector<QByteArray> > blockHeaders; // mapping of from_height -> headers
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std::map<std::pair<unsigned, unsigned>, unsigned> failures; // mapping of from,to -> failCt
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// todo: tune this
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const size_t DL_CONCURRENCY = size_t(qMin(qMax(int(Util::getNPhysicalProcessors())-BitcoinDMgr::N_CLIENTS, BitcoinDMgr::N_CLIENTS), 32));
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static constexpr unsigned maxErrCt = 3;
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const char * stateStr() const {
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static constexpr const char *stateStrings[] = { "Begin", "GetBlockHeaders", "FinishedDL", "End", "Failure", "IBD",
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"Unknown" /* this should always be last */ };
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auto idx = qMin(size_t(state), std::size(stateStrings)-1);
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return stateStrings[idx];
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}
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};
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void Controller::rmTask(CtlTask *t)
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{
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if (auto it = tasks.find(t); it != tasks.end()) {
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tasks.erase(it); // will delete object immediately
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return;
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}
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Error() << __FUNCTION__ << ": Task '" << t->objectName() << "' not found! FIXME!";
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}
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bool Controller::isTaskDeleted(CtlTask *t) const { return tasks.count(t) == 0; }
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void Controller::add_DLHeaderTask(unsigned int from, unsigned int to, size_t nTasks)
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{
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DownloadHeadersTask *t = new DownloadHeadersTask(unsigned(from), unsigned(to), this);
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connect(t, &CtlTask::success, this, [t, this, nTasks]{
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if (UNLIKELY(!sm || isTaskDeleted(t))) return; // task was stopped from underneath us, this is stale.. abort.
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Debug() << "Got all headers from: " << t->objectName() << " headerCt: " << t->headers.size();
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sm->blockHeaders[t->from].swap(t->headers); // constant time copy
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if (sm->blockHeaders.size() == nTasks) {
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sm->state = StateMachine::State::FinishedDL;
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AGAIN();
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}
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});
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connect(t, &CtlTask::errored, this, [t, this, nTasks]{
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if (UNLIKELY(!sm || isTaskDeleted(t))) return; // task was stopped from underneath us, this is stale.. abort.
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if (sm->state == StateMachine::State::Failure) return; // silently ignore if we are already in failure
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// Handle failures with retries for the specific task -- failures are unlikely so it's ok to do it on this level
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if (auto ct = ++sm->failures[std::make_pair(t->from, t->to)]; ct < sm->maxErrCt) {
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Warning() << "Task errored: " << t->objectName() << ", error: " << t->errorMessage << ", retrying # " << ct << " ...";
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add_DLHeaderTask(t->from, t->to, nTasks);
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} else {
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Error() << "Task errored: " << t->objectName() << ", error: " << t->errorMessage << ", failed after " << ct << " tries, giving up";
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genericTaskErrored();
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}
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});
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connect(t, &CtlTask::progress, t, [t, this](double prog){
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if (UNLIKELY(!sm || isTaskDeleted(t))) return; // task was stopped from underneath us, this is stale.. abort.
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Log() << "Downloaded height: " << t->from + unsigned(qRound(prog*((t->to-t->from)+1))) << ", " << QString::number(prog*1e2, 'f', 1) << "%";
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}, Qt::DirectConnection);
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tasks.emplace(t, t);
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t->start();
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}
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void Controller::genericTaskErrored()
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{
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if (sm && sm->state != StateMachine::State::Failure) {
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sm->state = StateMachine::State::Failure;
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AGAIN();
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}
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}
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void Controller::process(bool beSilentIfUpToDate)
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{
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bool enablePollTimer = false;
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auto polltimeout = polltime_ms;
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stopTimer(pollTimerName);
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Debug() << "Process called...";
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if (!sm) sm = std::make_unique<StateMachine>();
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using State = StateMachine::State;
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if (sm->state == State::Begin) {
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auto task = new GetChainInfoTask(this);
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connect(task, &CtlTask::success, this, [this, task, beSilentIfUpToDate]{
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if (UNLIKELY(!sm || isTaskDeleted(task))) return; // task was stopped from underneath us, this is stale.. abort.
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if (task->info.initialBlockDownload) {
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sm->state = State::IBD;
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AGAIN();
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return;
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}
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// TODO: detect reorgs here -- to be implemented later after we figure out data model more, etc.
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const auto old = int(storage.headers.size())-1;
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sm->ht = task->info.blocks;
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if (old == sm->ht) {
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if (!beSilentIfUpToDate) {
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Log() << "Block height " << sm->ht << ", up-to-date";
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emit upToDate();
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}
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sm->state = State::End;
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} else {
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Log() << "Block height " << sm->ht << ", downloading new headers ...";
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emit synchronizing();
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sm->state = State::GetBlockHeaders;
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}
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AGAIN();
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});
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connect(task, &CtlTask::errored, this, &Controller::genericTaskErrored);
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tasks.emplace(task, task);
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task->start();
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} else if (sm->state == State::GetBlockHeaders) {
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const size_t base = storage.headers.size();
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const size_t num = size_t(sm->ht+1) - base;
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const size_t nTasks = qMax(size_t(1), num < 1000 ? size_t(1) : sm->DL_CONCURRENCY);
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const size_t headersPerTask = num / nTasks, rem = num % nTasks;
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for (size_t i = 0; i < nTasks; ++i) {
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auto N = i+1 < nTasks ? headersPerTask : headersPerTask+rem;
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auto from = unsigned(base + i*headersPerTask), to = unsigned((from + N) - 1);
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add_DLHeaderTask(from, to, nTasks);
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}
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} else if (sm->state == State::FinishedDL) {
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size_t ctr = 0;
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for (const auto & pair : sm->blockHeaders) {
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ctr += pair.second.size();
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}
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Log() << "Downloaded " << ctr << " new " << Util::Pluralize("header", ctr) << ", verifying ...";
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ctr = 0;
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for (auto & [num, hdrs] : sm->blockHeaders) {
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Log() << "Verifying from " << num << " ...";
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for (const auto & hdr : hdrs) {
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if (hdr.size() != DownloadHeadersTask::HEADER_SIZE) {
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Error() << "Header " << ctr << " has wrong length!";
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sm->state = State::Failure;
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AGAIN();
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return;
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}
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++ctr;
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}
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}
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if (const auto size = storage.headers.size(); size + ctr < storage.headers.capacity())
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storage.headers.reserve(size + ctr); // reserve space for new headers in 1 go to save on copying
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ctr = 0;
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for (auto & [num, hdrs] : sm->blockHeaders) {
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Debug() << "Copying from " << num << " ...";
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storage.headers.insert(storage.headers.end(), hdrs.begin(), hdrs.end());
|
|
ctr += hdrs.size();
|
|
hdrs.clear();
|
|
}
|
|
storage.headers.shrink_to_fit(); // make sure no memory is wasted since we don't push_back but rather reserve ahead of time each time.
|
|
Log() << "Verified & copied " << ctr << " new " << Util::Pluralize("header", ctr) << " ok";
|
|
sm.reset(); // go back to "Begin" state to check if any new headers arrived in the meantime
|
|
AGAIN();
|
|
} else if (sm->state == State::Failure) {
|
|
// We will try again later via the pollTimer
|
|
Error() << "Failed to download headers";
|
|
sm.reset();
|
|
enablePollTimer = true;
|
|
emit synchFailure();
|
|
} else if (sm->state == State::End) {
|
|
sm.reset(); // great success!
|
|
enablePollTimer = true;
|
|
} else if (sm->state == State::IBD) {
|
|
sm.reset();
|
|
enablePollTimer = true;
|
|
Warning() << "bitcoind is in initial block download, will try again in 1 minute";
|
|
polltimeout = 60 * 1000; // try again every minute
|
|
emit synchFailure();
|
|
}
|
|
|
|
if (enablePollTimer)
|
|
callOnTimerSoonNoRepeat(polltimeout, pollTimerName, [this]{if (!sm) process(true);});
|
|
}
|
|
|
|
|
|
// -- CtlTask
|
|
CtlTask::CtlTask(Controller *ctl, const QString &name)
|
|
: QObject(nullptr), ctl(ctl)
|
|
{
|
|
setObjectName(name);
|
|
_thread.setObjectName(name);
|
|
connect(this, &CtlTask::progress, this, [this](double prog) { lastProgress = prog; });
|
|
}
|
|
|
|
CtlTask::~CtlTask() {
|
|
Debug("%s (%s)", __FUNCTION__, objectName().isEmpty() ? "" : objectName().toUtf8().constData());
|
|
stop();
|
|
}
|
|
|
|
void CtlTask::on_started()
|
|
{
|
|
ThreadObjectMixin::on_started();
|
|
conns += connect(this, &CtlTask::success, ctl, [this]{stop();});
|
|
conns += connect(this, &CtlTask::errored, ctl, [this]{stop();});
|
|
conns += connect(this, &CtlTask::finished, ctl, [this]{ctl->rmTask(this);});
|
|
process();
|
|
emit started();
|
|
}
|
|
|
|
void CtlTask::on_finished()
|
|
{
|
|
ThreadObjectMixin::on_finished();
|
|
emit finished();
|
|
}
|
|
|
|
void CtlTask::on_error(const RPC::Message &resp)
|
|
{
|
|
Warning() << resp.method << ": error response: " << resp.toJsonString();
|
|
errorCode = resp.errorCode();
|
|
errorMessage = resp.errorMessage();
|
|
emit errored();
|
|
}
|
|
void CtlTask::on_failure(const RPC::Message::Id &id, const QString &msg)
|
|
{
|
|
Warning() << id.toString() << ": FAIL: " << msg;
|
|
errorCode = id.toInt();
|
|
errorMessage = msg;
|
|
emit errored();
|
|
}
|
|
quint64 CtlTask::submitRequest(const QString &method, const QVariantList ¶ms, const BitcoinDMgr::ResultsF &resultsFunc)
|
|
{
|
|
quint64 id = IdMixin::newId();
|
|
ctl->bitcoindmgr->submitRequest(this, id, method, params,
|
|
resultsFunc,
|
|
[this](const RPC::Message &r){on_error(r);},
|
|
[this](const RPC::Message::Id &id, const QString &msg){on_failure(id, msg);});
|
|
return id;
|
|
}
|
|
|
|
|
|
|
|
// --- Controller stats
|
|
auto Controller::stats() const -> Stats
|
|
{
|
|
// "Servers"
|
|
auto st = QVariantMap{{ "Servers", srvmgr ? srvmgr->statsSafe() : QVariant() }};
|
|
|
|
// "BitcoinD's"
|
|
st["Bitcoin Daemon"] = bitcoindmgr->statsSafe();
|
|
|
|
// "Controller" (self)
|
|
QVariantMap m;
|
|
m["Headers"] = int(storage.headers.size());
|
|
if (sm) {
|
|
QVariantMap m2;
|
|
m2["State"] = sm->stateStr();
|
|
m2["Height"] = sm->ht;
|
|
if (const auto nDL = nHeadersDownloadedSoFar(); nDL > 0)
|
|
m2["Headers_Downloaded_This_Run"] = int(nDL);
|
|
m["StateMachine"] = m2;
|
|
} else
|
|
m["StateMachine"] = QVariant(); // null
|
|
QVariantMap timerMap;
|
|
for (const auto & timer: _timerMap) {
|
|
timerMap.insert(timer->objectName(), timer->interval());
|
|
}
|
|
m["activeTimers"] = timerMap;
|
|
QVariantList l;
|
|
{ // task list
|
|
const auto now = Util::getTime();
|
|
for (const auto & [task, ign] : tasks) {
|
|
Q_UNUSED(ign)
|
|
l.push_back(QVariantMap{{ task->objectName(), QVariantMap{
|
|
{"age", QString("%1 sec").arg(double((now-task->ts)/1e3))} ,
|
|
{"progress" , QString("%1%").arg(QString::number(task->lastProgress*100.0, 'f', 1)) }}
|
|
}});
|
|
}
|
|
Util::updateMap(m, QVariantMap{{"tasks" , l}});
|
|
}
|
|
st["Controller"] = m;
|
|
return st;
|
|
}
|
|
|
|
size_t Controller::nHeadersDownloadedSoFar() const
|
|
{
|
|
size_t ret = 0;
|
|
for (const auto & [task, ign] : tasks) {
|
|
Q_UNUSED(ign)
|
|
auto t = dynamic_cast<DownloadHeadersTask *>(task);
|
|
if (t)
|
|
ret += t->nSoFar();
|
|
}
|
|
return ret;
|
|
}
|