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UTXO database model + startup performance optimizations

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Replace per-transaction CTxIndex spent tracking with per-output UTXO
database (CUtxoEntry). ConnectBlock writes/erases UTXOs as blocks are
processed. FetchInputs reads directly from UTXO DB instead of
deserializing full transactions from disk.

Persist nChainTrust in block index (dbformat v3) to skip expensive
recalculation on every startup. Only populate setStakeSeen for last
500 blocks instead of all 2M+.

Lazy fallback to old CTxIndex path for databases upgrading from
pre-UTXO format - no big-bang migration required.

Fixes pre-existing bugs in introdialog.cpp (extra brace) and
net_bootstrap.cpp (namespace extern).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Sami Ahmed
2026-04-03 22:01:37 -07:00
parent 42a33457bf
commit f5a5ebb204
10 changed files with 666 additions and 370 deletions
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src/miner.cpp
+3 -6
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@@ -214,7 +214,6 @@ CBlock* CreateNewBlock(CWallet* pwallet, bool fProofOfStake, int64_t* pFees)
}
// Collect transactions into block
map<uint256, CTxIndex> mapTestPool;
uint64_t nBlockSize = 1000;
uint64_t nBlockTx = 0;
int nBlockSigOps = 100;
@@ -266,10 +265,10 @@ CBlock* CreateNewBlock(CWallet* pwallet, bool fProofOfStake, int64_t* pFees)
// Connecting shouldn't fail due to dependency on other memory pool transactions
// because we're already processing them in order of dependency
map<uint256, CTxIndex> mapTestPoolTmp(mapTestPool);
MapPrevTx mapInputs;
MapPrevTx mapEmpty;
bool fInvalid;
if (!tx.FetchInputs(txdb, mapTestPoolTmp, false, true, mapInputs, fInvalid))
if (!tx.FetchInputs(txdb, mapEmpty, false, true, mapInputs, fInvalid))
continue;
int64_t nTxFees = tx.GetValueIn(mapInputs)-tx.GetValueOut();
@@ -280,10 +279,8 @@ CBlock* CreateNewBlock(CWallet* pwallet, bool fProofOfStake, int64_t* pFees)
if (nBlockSigOps + nTxSigOps >= MAX_BLOCK_SIGOPS)
continue;
if (!tx.ConnectInputs(txdb, mapInputs, mapTestPoolTmp, CDiskTxPos(1,1,1), pindexPrev, false, true))
if (!tx.ConnectInputs(txdb, mapInputs, pindexPrev, false, true))
continue;
mapTestPoolTmp[tx.GetHash()] = CTxIndex(CDiskTxPos(1,1,1), tx.vout.size());
swap(mapTestPool, mapTestPoolTmp);
// Added
pblock->vtx.push_back(tx);