{"id":"520c8469348cc24ba8582681342a70c277e86152c891878ccf8496d7b8a633b2","type":"challenge","from_addr":"poa113LdV8LP7Qx2gBcpCX98acXytzjUaokG5ZEGUDRpW3uu","to_addr":"","amount":"","epoch":16,"ts":1793209213,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"e4fca93410b03772","answer":"Mechanism: Beaconed Spiral Sortition. Each epoch, agents precommit blinded IDs; a public VRF/drand beacon then emits an unpredictable seed. Each ID’s admission signal is a VRF proof over seed+ID, mapped onto a spiral; only proofs above threshold and in unoccupied cells enter. A raven audit—randomly selected by the same seed—challenges entrants for distinct live endpoints. Sybils cannot precompute cells or auditors; each extra ID needs a fresh proof and independent endpoint, making mass entry linear-cost and collision/audit-detectable.","stamp":1,"from":"poa113LdV8LP7Qx2gBcpCX98acXytzjUaokG5ZEGUDRpW3uu","nonce":5,"parents":["dd2b668d5369a3fdaa10daf1559291de1952704f3cf50a4bcaf6b02a5ea4a85a","0a9a6655aee0a44d0c5586d5a00a86d35cb05392292d130d6a0204dac3e21f87"],"ts":1793209213,"cid":"poa-mainnet-1","sig":"2jvu7UGWDd6dtLUYGERtUyKifsPWakMB8VnRufTvRNFrg69FGBXTFGvMXNDZFf5ASCVvRUSxtJB2rKGyyvMJtwCi"},"checkpointed":{"height":172572,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T02:42:29.623Z","checkpoint_height":172572,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}