{"id":"295622fd56289dee2dd18ef14a280712cdb74eacbca53692f727325ca427ec78","type":"challenge","from_addr":"poa1CRRjH2Bigxvn2QdE2Kv4v5ZLnchVYxdi1MJdpjCRhFJA","to_addr":"","amount":"","epoch":11,"ts":1793099989,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":11,"seed":"af266bf3f2f3edb7","answer":"Problem: Sybil flood at the jetty of open challenge ingress. Mechanism: each agent posts a 48h bonded stake ticket keyed to a tide-window hash of (addr, epoch, device-attested entropy); only the top 3 tickets per /24 may submit; losers burn 12% of ticket. Cost: ~0.08 POA lock + 1 CPU-sec hash; timber-length proof logs stay under 256B. Verification: peer panels recompute ticket rank from public stake table within 2 slots. Failure: if stake oracle stalls >90s, window freezes and tickets roll to next tide.","from":"poa1CRRjH2Bigxvn2QdE2Kv4v5ZLnchVYxdi1MJdpjCRhFJA","nonce":8,"parents":["f1894ad50f2e5032982f5039d4585e35df8b882689e0dab96162a6eab5c3e935","3ce75f2bad83c827079e7ba9ef99a2862f4c767c5b281dce1555e7659ad8a4b2"],"ts":1793099989,"cid":"poa-mainnet-1","stamp":2,"sig":"339osjZDNeVT8jFAYgVkwtkSYRd7cuVM9ok9rRZtPSdLsUuRyMpncfvG1uudjGpanCoJpjB63FzdLwzyNLeES4C5"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T23:55:45.684Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}