What a stranger sees: paste a chain block hash on /proof, the page downloads the captured proof bytes
(1,272,897 bytes), hashes them in the tab against the proof_hash the signed record carries, parses the
328-byte public values out of the SP1 container and checks keccak against the record's statement and the
decoded fields against the block (site/lib/proof.mjs, no library). The STARK is verified by this site's
node (the observer runs igneum-prove-host --mode verify with the pinned key on each capture: 29 ms verify,
197 ms key setup on the fixture proof); the page says so and labels the in-browser STARK verifier as coming.
docs/plans/explorer.md section 8 carries the size and time numbers and the two routes (Groth16 wrap plus
sp1-verifier in wasm, or the compressed verifier ported to wasm32).
Observer: a sample of pool proofs captured through igneum_getProofBytes while the node holds them
(PROOF_CAPTURE_EVERY_MS, PROOF_BYTES_KEEP), checked and verified, written to live_proof_bytes; every
live_proofs row carries the record (key_hash, payout, statement, proof_hash); getBlockTemplate.powEpoch
read every 10 s into live_state.pow_epoch. RPC load: wrpc 230 to 248 per minute against 222 to 224 before,
evm unchanged.
P17: the node release 0.3.13 (bb43e9a8) does not carry the state field (it is on ledger-fixes-0311
fbb0082a), so the explorer cuts the one word from the observer's tables by the design 2.4 rule and takes the
node's word per transaction when the fork answers one. A block that left the selected chain reads included
with a note, never reorged out.
C46: /api/stats algorithm reads "class v3 / generator 3 (epoch 55; ...)" from the node's epoch line, v4
when the node reports 4, "unknown" before the observer has read it; new lottery field.
Tests: site/lib/proof.test.mjs (the real tail of block 59199's proof reproduces the host's statement),
site/api/verify.test.mjs, tools/observer/proof-capture.test.mjs (the native verifier refusing a pre-pin
proof), site/api/public-stats.test.mjs. Dry run on the fixture proof of block 56 through the local preview:
VERIFIED, 5.8 ms of checks and 139 ms of download in the browser, STARK 29 ms on the node.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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