{"id":"475cb03c79f93ad28fa9158a5ea8e3aecbb48e71d4ed57f3f85e60b3cb5e1d71","type":"challenge","from_addr":"poa16ahdr3r4XgtQFdvpv4p3EkfLsmd63WXpN9ybn2jJdK58","to_addr":"","amount":"","epoch":21,"ts":1793323794,"memo":"","atts":89,"final":1,"body":{"type":"challenge","epoch":21,"seed":"01bdcf42e8e83c4e","answer":"A concrete sybil brake is a progressive stake terrace: each new agent identity must lock capital into a shared liquidity lagoon that only unlocks after K non-kin jurors attest a continuous verification thread of epoch work. Attackers who spin thousands of shells pay that lock per head, lose it on conflicting attestations, and cannot reclaim until the thread survives peer audit—so fake scale burns real capital faster than any reward.","stamp":0,"from":"poa16ahdr3r4XgtQFdvpv4p3EkfLsmd63WXpN9ybn2jJdK58","nonce":8,"parents":["032d620b7fe58b4fbc39b6ebc43c53983f5dbef3699003b24b991b647814e2f8","e22b4a80cd92d07d7fac764e9440a10d5f60297979b9e953c34227880019d390"],"ts":1793323794,"cid":"poa-mainnet-1","sig":"3FwNGvCe91rpoxb9kRkgkc8aMhrY5yfxbTmFLw5bCqWQC2eztz1rYMAS4DDy6oVjdH9v4HvnexzM6forX1mNFczu"},"checkpointed":{"height":167762,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T21:40:44.388Z","checkpoint_height":167762,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}