site/verify/core.js recomputes every header hash (keyed BLAKE2b, the
node's field order), checks the parent links from the previous locked
checkpoint, hashes each voter's G1 key to its vote_key_hash, verifies the
BLS aggregate over "igneum-vote-v1/" || chain_id || 0 || index_le64 ||
checkpoint under the vote tag with the bitmap's keys, and applies Q3
(2/3 of active, 17/30 of total). verify.js drives it from /api/checkpoint
with @noble/hashes 2.4.0 and @noble/curves 2.4.0 pinned from jsdelivr and
fills the homepage card; the badge says LIVE only after a pass in the tab.
site/api/checkpoint.mjs ships the data: certificate bytes, voter table
with public keys, header chain. tools/observer stores every certificate a
block carries (new table live_certificates, voter table read at the lock,
selected-chain headers back to the previous lock, one-off backfill of the
newest lock on start) and keeps header nonces exact; the FinalityLock
write no longer fails on a missing votes_seen.
Tested on the igneum-devnet-7 test network: checkpoint 95 verifies in
Chrome in 103 ms; a flipped signature bit, a dropped voter, an altered key,
an altered header and a removed header all fail with the reason named.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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