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-rw-r--r--src/main.cpp80
1 files changed, 74 insertions, 6 deletions
diff --git a/src/main.cpp b/src/main.cpp
index 027a36394c..45e5881897 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -34,6 +34,7 @@
#include "utilmoneystr.h"
#include "utilstrencodings.h"
#include "validationinterface.h"
+#include "versionbits.h"
#include <sstream>
@@ -2083,6 +2084,51 @@ void PartitionCheck(bool (*initialDownloadCheck)(), CCriticalSection& cs, const
}
}
+// Protected by cs_main
+static VersionBitsCache versionbitscache;
+
+int32_t ComputeBlockVersion(const CBlockIndex* pindexPrev, const Consensus::Params& params)
+{
+ LOCK(cs_main);
+ int32_t nVersion = VERSIONBITS_TOP_BITS;
+
+ for (int i = 0; i < (int)Consensus::MAX_VERSION_BITS_DEPLOYMENTS; i++) {
+ ThresholdState state = VersionBitsState(pindexPrev, params, (Consensus::DeploymentPos)i, versionbitscache);
+ if (state == THRESHOLD_LOCKED_IN || state == THRESHOLD_STARTED) {
+ nVersion |= VersionBitsMask(params, (Consensus::DeploymentPos)i);
+ }
+ }
+
+ return nVersion;
+}
+
+/**
+ * Threshold condition checker that triggers when unknown versionbits are seen on the network.
+ */
+class WarningBitsConditionChecker : public AbstractThresholdConditionChecker
+{
+private:
+ int bit;
+
+public:
+ WarningBitsConditionChecker(int bitIn) : bit(bitIn) {}
+
+ int64_t BeginTime(const Consensus::Params& params) const { return 0; }
+ int64_t EndTime(const Consensus::Params& params) const { return std::numeric_limits<int64_t>::max(); }
+ int Period(const Consensus::Params& params) const { return params.nMinerConfirmationWindow; }
+ int Threshold(const Consensus::Params& params) const { return params.nRuleChangeActivationThreshold; }
+
+ bool Condition(const CBlockIndex* pindex, const Consensus::Params& params) const
+ {
+ return ((pindex->nVersion & VERSIONBITS_TOP_MASK) == VERSIONBITS_TOP_BITS) &&
+ ((pindex->nVersion >> bit) & 1) != 0 &&
+ ((ComputeBlockVersion(pindex->pprev, params) >> bit) & 1) == 0;
+ }
+};
+
+// Protected by cs_main
+static ThresholdConditionCache warningcache[VERSIONBITS_NUM_BITS];
+
static int64_t nTimeCheck = 0;
static int64_t nTimeForks = 0;
static int64_t nTimeVerify = 0;
@@ -2452,24 +2498,42 @@ void static UpdateTip(CBlockIndex *pindexNew) {
// Check the version of the last 100 blocks to see if we need to upgrade:
static bool fWarned = false;
- if (!IsInitialBlockDownload() && !fWarned)
+ if (!IsInitialBlockDownload())
{
int nUpgraded = 0;
const CBlockIndex* pindex = chainActive.Tip();
+ for (int bit = 0; bit < VERSIONBITS_NUM_BITS; bit++) {
+ WarningBitsConditionChecker checker(bit);
+ ThresholdState state = checker.GetStateFor(pindex, chainParams.GetConsensus(), warningcache[bit]);
+ if (state == THRESHOLD_ACTIVE || state == THRESHOLD_LOCKED_IN) {
+ if (state == THRESHOLD_ACTIVE) {
+ strMiscWarning = strprintf(_("Warning: unknown new rules activated (versionbit %i)"), bit);
+ if (!fWarned) {
+ CAlert::Notify(strMiscWarning, true);
+ fWarned = true;
+ }
+ } else {
+ LogPrintf("%s: unknown new rules are about to activate (versionbit %i)\n", __func__, bit);
+ }
+ }
+ }
for (int i = 0; i < 100 && pindex != NULL; i++)
{
- if (pindex->nVersion > CBlock::CURRENT_VERSION)
+ int32_t nExpectedVersion = ComputeBlockVersion(pindex->pprev, chainParams.GetConsensus());
+ if (pindex->nVersion > VERSIONBITS_LAST_OLD_BLOCK_VERSION && (pindex->nVersion & ~nExpectedVersion) != 0)
++nUpgraded;
pindex = pindex->pprev;
}
if (nUpgraded > 0)
- LogPrintf("%s: %d of last 100 blocks above version %d\n", __func__, nUpgraded, (int)CBlock::CURRENT_VERSION);
+ LogPrintf("%s: %d of last 100 blocks have unexpected version\n", __func__, nUpgraded);
if (nUpgraded > 100/2)
{
// strMiscWarning is read by GetWarnings(), called by Qt and the JSON-RPC code to warn the user:
- strMiscWarning = _("Warning: This version is obsolete; upgrade required!");
- CAlert::Notify(strMiscWarning, true);
- fWarned = true;
+ strMiscWarning = _("Warning: Unknown block versions being mined! It's possible unknown rules are in effect");
+ if (!fWarned) {
+ CAlert::Notify(strMiscWarning, true);
+ fWarned = true;
+ }
}
}
}
@@ -3763,6 +3827,10 @@ void UnloadBlockIndex()
setDirtyFileInfo.clear();
mapNodeState.clear();
recentRejects.reset(NULL);
+ versionbitscache.Clear();
+ for (int b = 0; b < VERSIONBITS_NUM_BITS; b++) {
+ warningcache[b].clear();
+ }
BOOST_FOREACH(BlockMap::value_type& entry, mapBlockIndex) {
delete entry.second;