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handle takeover going back to zero

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Brannon King 2019-12-05 17:54:13 -07:00 committed by Anthony Fieroni
parent 5e3dbb40cc
commit d942ffa1f2
2 changed files with 45 additions and 40 deletions
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21
src/claimtrie/forks.cpp
View file

@ -141,12 +141,13 @@ bool CClaimTrieCacheNormalizationFork::normalizeAllNamesInTrieIfNecessary()
ensureTransacting();
// make the new nodes
db << "INSERT INTO nodes(name) "
"SELECT NORMALIZED(name) AS nc FROM claims WHERE nc != nodeName "
"AND activationHeight <= ?1 AND expirationHeight > ?1 "
"UNION SELECT NORMALIZED(name) AS ns FROM supports WHERE ns != nodeName "
"AND activationHeight <= ?1 AND expirationHeight > ?1 "
"ON CONFLICT(name) DO UPDATE SET hash = NULL" << nNextHeight;
db << "INSERT INTO nodes(name) SELECT NORMALIZED(name) AS nn FROM claims WHERE nn != nodeName "
"AND activationHeight <= ?1 AND expirationHeight > ?1 ON CONFLICT(name) DO UPDATE SET hash = NULL" << nNextHeight;
// there's a subtlety here: names in supports don't make new nodes
db << "UPDATE nodes SET hash = NULL WHERE name IN "
"(SELECT NORMALIZED(name) AS nn FROM supports WHERE nn != nodeName "
"AND activationHeight <= ?1 AND expirationHeight > ?1)" << nNextHeight;
// update the claims and supports
db << "UPDATE claims SET nodeName = NORMALIZED(name) WHERE activationHeight <= ?1 AND expirationHeight > ?1" << nNextHeight;
@ -168,12 +169,8 @@ bool CClaimTrieCacheNormalizationFork::unnormalizeAllNamesInTrieIfNecessary()
{
ensureTransacting();
db << "INSERT INTO nodes(name) "
"SELECT name FROM claims WHERE name != nodeName "
"AND activationHeight < ?1 AND expirationHeight > ?1 "
"UNION SELECT name FROM supports WHERE name != nodeName "
"AND activationHeight < ?1 AND expirationHeight > ?1 "
"ON CONFLICT(name) DO UPDATE SET hash = NULL" << nNextHeight;
db << "INSERT INTO nodes(name) SELECT name FROM claims WHERE name != nodeName "
"AND activationHeight < ?1 AND expirationHeight > ?1 ON CONFLICT(name) DO UPDATE SET hash = NULL" << nNextHeight;
db << "UPDATE nodes SET hash = NULL WHERE name IN "
"(SELECT nodeName FROM supports WHERE name != nodeName "

64
src/claimtrie/trie.cpp
View file

@ -67,9 +67,8 @@ CClaimTrie::CClaimTrie(bool fWipe, int height,
db << "CREATE INDEX IF NOT EXISTS nodes_parent ON nodes (parent)";
db << "CREATE TABLE IF NOT EXISTS takeover (name TEXT NOT NULL, height INTEGER NOT NULL, "
"claimID BLOB COLLATE BINARY, UNIQUE (name, height, claimID));";
"claimID BLOB COLLATE BINARY, PRIMARY KEY(name, height));";
db << "CREATE INDEX IF NOT EXISTS takeover_name ON takeover (name)";
db << "CREATE INDEX IF NOT EXISTS takeover_height ON takeover (height)";
db << "CREATE TABLE IF NOT EXISTS claims (claimID BLOB NOT NULL COLLATE BINARY PRIMARY KEY, name TEXT NOT NULL, "
@ -363,10 +362,14 @@ bool CClaimTrieCacheBase::getInfoForName(const std::string& name, CClaimValue& c
CClaimSupportToName CClaimTrieCacheBase::getClaimsForName(const std::string& name) const
{
int nLastTakeoverHeight;
db << "SELECT IFNULL(MAX(height), 0) FROM takeover WHERE name = ?" << name
>> nLastTakeoverHeight;
int nLastTakeoverHeight = 0;
{
auto query = db << "SELECT CASE WHEN claimID IS NULL THEN 0 ELSE height END "
"FROM takeover WHERE name = ? ORDER BY height DESC LIMIT 1" << name;
for (auto&& row: query) {
row >> nLastTakeoverHeight;
}
}
claimEntryType claims;
{
auto query = db << "SELECT claimID, txID, txN, blockHeight, activationHeight, amount "
@ -436,8 +439,8 @@ bool CClaimTrieCacheBase::checkConsistency()
// verify that all claims hash to the values on the nodes
auto query = db << "SELECT n.name, n.hash, "
"(SELECT t.height FROM takeover t WHERE t.name = n.name "
"ORDER BY t.height DESC LIMIT 1) FROM nodes n";
"IFNULL((SELECT CASE WHEN t.claimID IS NULL THEN 0 ELSE t.height END "
"FROM takeover t WHERE t.name = n.name ORDER BY t.height DESC LIMIT 1), 0) FROM nodes n";
for (auto&& row: query) {
std::string name;
CUint256 hash;
@ -497,8 +500,8 @@ bool CClaimTrieCacheBase::flush()
CClaimTrieCacheBase::CClaimTrieCacheBase(CClaimTrie* base)
: base(base), db(base->dbFile, sharedConfig), transacting(false),
childHashQuery(db << "SELECT n.name, n.hash, (SELECT t.height FROM takeover t "
"WHERE t.name = n.name ORDER BY t.height DESC LIMIT 1) FROM nodes n "
childHashQuery(db << "SELECT n.name, n.hash, IFNULL((SELECT CASE WHEN t.claimID IS NULL THEN 0 ELSE t.height END FROM takeover t "
"WHERE t.name = n.name ORDER BY t.height DESC LIMIT 1), 0) FROM nodes n "
"WHERE n.parent = ? ORDER BY n.name"),
claimHashQuery(db << "SELECT c.txID, c.txN, c.claimID, c.blockHeight, c.activationHeight, c.amount, "
"(SELECT IFNULL(SUM(s.amount),0)+c.amount FROM supports s "
@ -507,11 +510,11 @@ CClaimTrieCacheBase::CClaimTrieCacheBase(CClaimTrie* base)
"FROM claims c WHERE c.nodeName = ?2 AND c.activationHeight < ?1 "
"AND c.expirationHeight >= ?1 "
"ORDER BY effectiveAmount DESC, c.blockHeight, c.txID, c.txN"),
proofClaimQuery("SELECT n.name, (SELECT t.height FROM takeover t WHERE t.name = n.name "
"ORDER BY t.height DESC LIMIT 1) FROM nodes n "
"WHERE n.name IN (WITH RECURSIVE prefix(p) AS (VALUES(?) UNION ALL "
"SELECT POPS(p) FROM prefix WHERE p != '') SELECT p FROM prefix) "
"ORDER BY n.name")
proofClaimQuery("SELECT n.name, IFNULL((SELECT CASE WHEN t.claimID IS NULL THEN 0 ELSE t.height END "
"FROM takeover t WHERE t.name = n.name ORDER BY t.height DESC LIMIT 1), 0) FROM nodes n "
"WHERE n.name IN (WITH RECURSIVE prefix(p) AS (VALUES(?) UNION ALL "
"SELECT POPS(p) FROM prefix WHERE p != '') SELECT p FROM prefix) "
"ORDER BY n.name")
{
assert(base);
nNextHeight = base->nNextHeight;
@ -551,8 +554,8 @@ CUint256 CClaimTrieCacheBase::getMerkleHash()
if (!hash.IsNull())
return hash;
assert(transacting); // no data changed but we didn't have the root hash there already?
db << "SELECT n.name, (SELECT t.height FROM takeover t WHERE t.name = n.name "
"ORDER BY t.height DESC LIMIT 1) FROM nodes n WHERE n.hash IS NULL ORDER BY SIZE(n.name) DESC"
db << "SELECT n.name, IFNULL((SELECT CASE WHEN t.claimID IS NULL THEN 0 ELSE t.height END FROM takeover t WHERE t.name = n.name "
"ORDER BY t.height DESC LIMIT 1), 0) FROM nodes n WHERE n.hash IS NULL ORDER BY SIZE(n.name) DESC"
>> [this, &hash](const std::string& name, int takeoverHeight) {
hash = computeNodeHash(name, takeoverHeight);
db << "UPDATE nodes SET hash = ? WHERE name = ?" << hash << name;
@ -1132,13 +1135,15 @@ bool CClaimTrieCacheBase::incrementBlock()
ensureTransacting();
db << "INSERT INTO nodes(name) SELECT nodeName FROM claims "
"WHERE (activationHeight = ?1 AND expirationHeight > ?1) "
"OR expirationHeight = ?1 "
"UNION SELECT nodeName FROM supports "
"WHERE (activationHeight = ?1 AND expirationHeight > ?1) "
"OR expirationHeight = ?1 "
"WHERE activationHeight = ?1 AND expirationHeight > ?1 "
"ON CONFLICT(name) DO UPDATE SET hash = NULL" << nNextHeight;
// don't make new nodes for items in supports or items that expire this block that don't exist in claims
db << "UPDATE nodes SET hash = NULL WHERE name IN "
"(SELECT nodeName FROM claims WHERE expirationHeight = ?1 "
"UNION SELECT nodeName FROM supports WHERE expirationHeight = ?1 OR "
"(validHeight = ?1 AND expirationHeight > ?1))" << nNextHeight;
// takeover handling:
db << "SELECT name FROM nodes WHERE hash IS NULL"
>> [this](const std::string& nameWithTakeover) {
@ -1163,10 +1168,13 @@ bool CClaimTrieCacheBase::incrementBlock()
logPrint << "Takeover on " << nameWithTakeover << " at " << nNextHeight << ", happening: " << takeoverHappening << ", set before: " << hasBeenSetBefore << Clog::endl;
if ((takeoverHappening || !hasBeenSetBefore) && hasCandidate) {
db << "INSERT INTO takeover(name, height, claimID) VALUES(?, ?, ?)"
<< nameWithTakeover << nNextHeight << candidateValue.claimId;
assert(db.rows_modified());
if (takeoverHappening || !hasBeenSetBefore) {
if (hasCandidate)
db << "INSERT INTO takeover(name, height, claimID) VALUES(?, ?, ?)"
<< nameWithTakeover << nNextHeight << candidateValue.claimId;
else if (hasBeenSetBefore)
db << "INSERT INTO takeover(name, height, claimID) VALUES(?, ?, NULL)"
<< nameWithTakeover << nNextHeight;
}
};
@ -1215,9 +1223,9 @@ bool CClaimTrieCacheBase::finalizeDecrement()
db << "UPDATE nodes SET hash = NULL WHERE name IN "
"(SELECT nodeName FROM claims WHERE activationHeight = ?1 AND expirationHeight > ?1 "
"UNION SELECT nodeName FROM supports WHERE activationHeight = ?1 AND expirationHeight > ?1 "
"UNION SELECT DISTINCT name FROM takeover WHERE height = ?1)" << nNextHeight;
"UNION SELECT name FROM takeover WHERE height = ?1)" << nNextHeight;
db << "DELETE FROM takeover WHERE height = ?" << nNextHeight;
db << "DELETE FROM takeover WHERE height >= ?" << nNextHeight;
return true;
}