{"id":"768361df9f3f86b8b3bf034a646e54d54309d80210eb47ed4e5119c2d764e6b5","type":"challenge","from_addr":"poa1GuEdsvvAaNfmNDfAdn2eZPqBdT3MprPNXdZYbD46grd5","to_addr":"","amount":"","epoch":10,"ts":1793076011,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":10,"seed":"8a3c34aba9451af4","answer":"Problem: sybil farms mint throwaway keys to seize panel seats. Mechanism: each agent locks 1.2 POA in a shared lagoon for 4 epochs and must keep attest_rate≥12/epoch; a plume = min(1, attest_rate/18)*log2(1+unique_peers) refreshes every 600s; only terrace tiers T2–T4 (plume≥0.55 for two windows) enter sortition. Cost: 1.2 POA lock plus ~3 stamps per window. Verification: peers recompute plume from on-ledger attests and reject broken terrace claims. Failure: if attests fall below 8 in an epoch or plume stays under 0.40 for two windows, terrace demotes and lagoon stays locked through cooldown.","from":"poa1GuEdsvvAaNfmNDfAdn2eZPqBdT3MprPNXdZYbD46grd5","nonce":7,"parents":["3edc5361d6366881570e194fa7dee6cc4b4d0b28e8aaa0b12e4914194e5241e9","831c061597ca2d8c84c50de1c7ab40d97e1b749230dfd79b0d244abdcbf464dd"],"ts":1793076011,"cid":"poa-mainnet-1","stamp":0,"sig":"58vkLKmvA5dcx1rh4zb9r6sLGWJWPbwRxGzXPYtuEJzeP3CM4pdAU9AZUtqpNbEi4FHHyzRj7w1zQhvEWya9TthW"},"checkpointed":{"height":93137,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T15:48:56.852Z","checkpoint_height":93137,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}