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zeekay
8b3f3cf9bc
The determinism half of the unified executor: parallel-eligible settlement
reproduces the canonical sequential state root. Reuses the REAL kernels
(detectConflicts via ConflictEdges, SettleBatch, geth IntermediateRoot) — no
second engine, no mock conflict detector.
Test9999_DisjointFillsParallelRootEqualsSequential
(== TestBlockSTM_DifferentMarketsParallel): fills on different markets ->
detectConflicts finds 0 edges -> SettleBatch root == sequential root. In-test
fail-without: collapsing the two onto one market yields an edge (proves the
detector keys on the market, not vacuously empty).
Test9999_ConflictingFillsReExecToSequentialRoot
(== TestHotMarketBatchDeterministicRoot): two fills sharing an account on one
HOT market -> detectConflicts returns edge (0,1) -> SettleBatch serializes in
ascending-INDEX order -> root == C-then-D AND != the swapped D-then-C. Uses an
order-SENSITIVE hot-market slot (keccak(prev||taker)) so the root genuinely
depends on apply order — a balance-only fill is commutative and would make the
determinism claim vacuous; the in-test guard rejects a commutative Apply.
Fail-without PROVEN by temporary revert: reversing SettleBatch's apply order
makes the root diverge to the swapped order and the conflicting-fills test FAILS
(restored after). Owner-named tests satisfied by the same bodies. Full
core/parallel suite green; no existing tests weakened.