Sync-freeze patch (original):
- Backpressure ceiling HEADER_FRONT_MAX_AHEAD=8000
- PruneHeaders protects live sync window (nProtectFloor)
- Hard-cap eviction from highest-height first
- Bridge-repair getheaders from connected tip via PathReachesChain
Additional fix:
- Skip PoW check on PoS headers (nonce=0) in AddHeaderNode
Block 1026 is PoS but within the 0-9000 PoW range — old code
rejected valid PoS headers and severed the chain at height 1025
Verified: from-zero no-snapshot sync reached block 17k+ past the
old 15k freeze zone. 132/132 unit tests pass.
CSyncManager extracts the headers-first IBD planner from main.cpp into
its own translation unit. main.cpp loses ~570 lines of file-scope state
and helper functions; the headers handler, block-delivery latency
tracking, stall-recovery, and per-peer Tick cadence now route through
g_syncManager.
MaybeMigrateLevelDbToRocksDb() is now reachable via -migratechaindb /
-migratechaindbforce in init.cpp. Reads from <datadir>/txleveldb and
writes byte-for-byte identical records into <datadir>/rocksdb via a
new CRocksTxDB::WriteRawRecordForMigration() shim over WriteRaw.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Sami Ahmed
sami7777