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Support testnet rollback.

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Signed-off-by: Daira Hopwood <daira@jacaranda.org>
This commit is contained in:
Daira Hopwood
2018-07-31 22:29:14 +01:00
parent 871e1726c6
commit 66856b2b3c
3 changed files with 48 additions and 21 deletions
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58
src/main.cpp
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@@ -4217,7 +4217,7 @@ bool CVerifyDB::VerifyDB(CCoinsView *coinsview, int nCheckLevel, int nCheckDepth
return true;
}
bool RewindBlockIndex(const CChainParams& params)
bool RewindBlockIndex(const CChainParams& params, bool& clearWitnessCaches)
{
LOCK(cs_main);
@@ -4249,23 +4249,45 @@ bool RewindBlockIndex(const CChainParams& params)
// nHeight is now the height of the first insufficiently-validated block, or tipheight + 1
auto rewindLength = chainActive.Height() - nHeight;
if (rewindLength > 0 && rewindLength > MAX_REORG_LENGTH) {
auto pindexOldTip = chainActive.Tip();
auto pindexRewind = chainActive[nHeight - 1];
auto msg = strprintf(_(
"A block chain rewind has been detected that would roll back %d blocks! "
"This is larger than the maximum of %d blocks, and so the node is shutting down for your safety."
), rewindLength, MAX_REORG_LENGTH) + "\n\n" +
_("Rewind details") + ":\n" +
"- " + strprintf(_("Current tip: %s, height %d"),
pindexOldTip->phashBlock->GetHex(), pindexOldTip->nHeight) + "\n" +
"- " + strprintf(_("Rewinding to: %s, height %d"),
pindexRewind->phashBlock->GetHex(), pindexRewind->nHeight) + "\n\n" +
_("Please help, human!");
LogPrintf("*** %s\n", msg);
uiInterface.ThreadSafeMessageBox(msg, "", CClientUIInterface::MSG_ERROR);
StartShutdown();
return false;
LogPrintf("*** First insufficiently validated block at height %d, rewind length %d\n", nHeight, rewindLength);
clearWitnessCaches = false;
if (rewindLength > 0) {
const uint256 *phashFirstInsufValidated = chainActive[nHeight]->phashBlock;
auto networkID = params.NetworkIDString();
// This is true when we intend to do a long rewind.
bool intendedRewind =
(networkID == "test" && nHeight == 252500 && *phashFirstInsufValidated ==
uint256S("0018bd16a9c6f15795a754c498d2b2083ab78f14dae44a66a8d0e90ba8464d9c"));
clearWitnessCaches = (rewindLength > MAX_REORG_LENGTH && intendedRewind);
if (clearWitnessCaches) {
auto msg = strprintf(_(
"An intended block chain rewind has been detected: network %s, hash %s, height %d"
), networkID, phashFirstInsufValidated->GetHex(), nHeight);
LogPrintf("*** %s\n", msg);
}
if (rewindLength > MAX_REORG_LENGTH && !intendedRewind) {
auto pindexOldTip = chainActive.Tip();
auto pindexRewind = chainActive[nHeight - 1];
auto msg = strprintf(_(
"A block chain rewind has been detected that would roll back %d blocks! "
"This is larger than the maximum of %d blocks, and so the node is shutting down for your safety."
), rewindLength, MAX_REORG_LENGTH) + "\n\n" +
_("Rewind details") + ":\n" +
"- " + strprintf(_("Current tip: %s, height %d"),
pindexOldTip->phashBlock->GetHex(), pindexOldTip->nHeight) + "\n" +
"- " + strprintf(_("Rewinding to: %s, height %d"),
pindexRewind->phashBlock->GetHex(), pindexRewind->nHeight) + "\n\n" +
_("Please help, human!");
LogPrintf("*** %s\n", msg);
uiInterface.ThreadSafeMessageBox(msg, "", CClientUIInterface::MSG_ERROR);
StartShutdown();
return false;
}
}
CValidationState state;