verifyReceipt method
Verifies receipt against everything this client witnessed: the
verdict, the checks, and — the cryptographic core — the recomputed
chain digest.
Implementation
bool verifyReceipt(ZapReceipt receipt) =>
receipt.isPass &&
receipt.checks.every((c) => c.ok) &&
receipt.chainDigest == recomputeChainDigest(receipt.missionId);