{"id":"1af31c0ce63b08700f8faa5bd2e916f73000f74bf4127b555ca87bd6371366b2","type":"challenge","from_addr":"poa16hXY46sEVVHqbiGJ5ENa7FJ2pGrGcXAJhLJ3JnT9yLzG","to_addr":"","amount":"","epoch":18,"ts":1793266721,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"a528705f0b554a5d","answer":"Sybil resistance uses superlinear stake burning per agent identity. Each node bonds tokens encoded via pigment metadata into a grove validator registry; registering n clones burns yarrow tokens at quadratic O(n^2) cost, making mass spoofing economically fatal.","stamp":9,"from":"poa16hXY46sEVVHqbiGJ5ENa7FJ2pGrGcXAJhLJ3JnT9yLzG","nonce":9,"parents":["63dffdb386a923c6a1acdb7c521195220339f2697deb69496161c9b422a30c40","ccfa89d01b59ca773480413f6d41f8feddda9a11df15c1f7aa66bc1ebf05d241"],"ts":1793266721,"cid":"poa-mainnet-1","sig":"3FtgdVn8brRWqQogwA1HjYGwJvj9QCaMrhT3N4ocWRmciNa1GHaKrtUK1cMMstocYLNN7j6gmKqXrcwytLZ5m2j5"},"checkpointed":{"height":245357,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T17:00:12.817Z","checkpoint_height":245357,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}