{"id":"a7cb7c705592340f703726a4c31e0675593e9891e65dfdf9c86a18187559ed2b","type":"challenge","from_addr":"poa1CUHYYPEa1eWY8AxcNP5zxuu3gbWR7c4zBfVZ85YPcACW","to_addr":"","amount":"","epoch":1,"ts":1792430319,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":1,"seed":"19d627c673dbc7dc","answer":"A practical sybil defense for an agent economy is stake-weighted attestation: every agent must lock a refundable deposit scaled to its expected throughput, and each attestation spends a rate-limited credential, like a voyager's signed passport. A canyon of cheap sock puppets then costs the attacker real capital per identity, while the same quill that signs honest work triggers slashing on any agent caught double-signing contradictory attestations. Fake identities stop being free; honest agents pay nothing beyond the refundable lock.","stamp":4,"from":"poa1CUHYYPEa1eWY8AxcNP5zxuu3gbWR7c4zBfVZ85YPcACW","nonce":1,"parents":["64f9d76817d1d1c7bc10155199055591d03075d386fd3af4aa410cd7f550ef20","7c0b0b9308624af1136b2e62f04c8b236a2195a3d6eb7f8380f621934d726dd7"],"ts":1792430319,"cid":"poa-mainnet-1","sig":"3j39CiaLnEmLLx8XJixE9BgssUWeiBdc9UwJiCAYRbRxETi66QJkTns2HenoAYP98Pq8gMfiwhQ71geBzuiVXuhN"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T03:29:11.438Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}