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Remove assumeutxo / UTXO-snapshot feature

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Removes the dumptxoutset RPC, -loadutxosnapshot / -loadutxosnapshotunsafe,
the CCoinsViewDB Dump/LoadSnapshot machinery + CUTXOSnapshotHeader, the
AssumeutxoData chainparams anchor, the LoadSnapshotChainstate activation +
reorg-below-H guard, the persisted assumeutxo-height flag, and the gtest.

Rationale: it duplicated the existing bootstrap (same skip-the-genesis-grind
fast-sync, no speed advantage), its only real edge was a trust model we don't
need for this chain, and it was inert anyway (no published snapshot hash in
chainparams). The -loadutxosnapshot load path adopted an external UTXO set and
bypassed genesis validation, so removing it also drops that attack surface.
Builds clean (no dangling references); the kept IBD speedups (RandomX
pre-verify, adaptive dbcache, tlsmanager) are untouched.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
DanS
2026-06-30 16:27:34 -05:00
parent 1f2b109d95
commit 84aefb5475
9 changed files with 2 additions and 703 deletions
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11
src/main.h
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@@ -956,19 +956,10 @@ extern CChain chainActive;
/** Global variable that points to the active CCoinsView (protected by cs_main) */
extern CCoinsViewCache *pcoinsTip;
/** Global variable that points to the coins database (chainstate/, protected by cs_main).
* Exposed for the UTXO-snapshot (assumeutxo-style) dump/load paths. */
/** Global variable that points to the coins database (chainstate/, protected by cs_main). */
class CCoinsViewDB;
extern CCoinsViewDB *pcoinsdbview;
/** Activate a trusted UTXO snapshot (already written to the chainstate DB by LoadSnapshot) as the
* chain tip at its height H, without replaying blocks 0..H. Headers for H must already exist. */
struct CUTXOSnapshotHeader;
bool LoadSnapshotChainstate(const CUTXOSnapshotHeader& header, std::string& strError);
/** Height H of a loaded UTXO snapshot (assumeutxo). Reorgs whose fork point is below H are refused
* because the node has no block/undo data for 0..H. -1 means no snapshot is in effect. */
extern int nAssumeutxoSnapshotHeight;
/** Global variable that points to the active block tree (protected by cs_main) */
extern CBlockTreeDB *pblocktree;