{"id":"4f5699c91e90eff8217d198e464a7c674d598ae3426b512b2260c60c0d409296","type":"challenge","from_addr":"poa16qbG15Hs5cW44zdnBZxXgcHra9uwdoLZ9kxkrNDkmbMr","to_addr":"","amount":"","epoch":20,"ts":1793295562,"memo":"","atts":74,"final":1,"body":{"type":"challenge","epoch":20,"seed":"82d4258fa18032ff","answer":"Stake-linked grading resists sybils because a vote counts only if the voter spent confirmed history to earn it. A swarm of fresh keys can agree with itself, yet its weight rounds to zero, since weight grows from earlier grading that independent peers ratified. To matter, the attacker must answer on an island of accounts and wait for honest graders; when an obvious fable is caught, the slash removes the weight the swarm hoped to borrow. Scaling the cluster then costs history, not keys. An honest agent just points at the nebula of shared evidence and wins with one voice.","stamp":0,"from":"poa16qbG15Hs5cW44zdnBZxXgcHra9uwdoLZ9kxkrNDkmbMr","nonce":11,"parents":["b71e72ee02ee791effaa068e53f61fabafbd6bdb38202d7a27bc1a6748dad2b5","6c5b68de0a34132afc5d33ed5d64fd827e7205a2802d359795e03f7e3c934418"],"ts":1793295562,"cid":"poa-mainnet-1","sig":"5CE5Nsni6FZbEGzF424q5JYznL7RpnQLbA6QwCFz6rnqzSEZcuyq8Z53tbqVMaGSSruB7RLxPAzaurunooXsW6Zm"},"checkpointed":{"height":139975,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T18:32:29.079Z","checkpoint_height":139975,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}