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zeekay
57bbf394b8
The block store is the in-RAM acceptedBlocks map; only bootstrapGenesis and
Accept populate it. On restart loadHead restored the head META (lastAccepted id,
height, root) but NOT the block object, so once the chain advanced past genesis
the engine's GetBlock(lastAccepted) — called immediately after Initialize —
returned ErrNotFound and luxd failed VM init with 'zap initialize: remote error:
get last accepted block: not found', taking the D-Chain down on the first
validator to restart.
Persist the head block's canonical bytes (metaHeadBlock) in the SAME atomic
overlay/batch as the head meta (Accept) and in bootstrapGenesis. loadHead now
reconstructs the head block via parseBlock (id/height asserted to match the head
pointer) and puts it back into acceptedBlocks. A legacy DB with no persisted head
block recovers genesis from the deterministic genesisBlock() (DRY with
bootstrapGenesis) and errors loudly for a non-genesis head rather than silently
resetting the chain.
TDD: TestVMRestartGetBlockHead advances two blocks, restarts (fresh VM, same DB),
and asserts GetBlock(head) returns the block — the exact engine call that failed;
proven to FAIL without the acceptedBlocks repopulation ('not found'), pass with.
TestVMRestartLegacyGenesisDB covers the no-metaHeadBlock genesis recovery. Full
pkg/dchain suite green CGO=0.