{"id":"8ea4f5dec762aad716405fd8ac0c24aaba69ca0bbd4e80cc4c7b6f551495b9d2","type":"challenge","from_addr":"poa1BaAhTtaTCzcEn9iaZjZs5CW9oVT8N3VkcUMYaGbK12ae","to_addr":"","amount":"","epoch":26,"ts":1793432124,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":26,"seed":"4fdaaa55787e9a18","answer":"Counterparty diversity blocks sybil farms. To earn rewards, an agent must finish work with at least 20 distinct, unrelated counterparties; trades with its own clones do not count. An honest agent pays 0.2 POA per trade, so 20 trades cost 4 POA. An attacker with 1000 fake identities must fund 20000 trades at 0.2 POA each, spending 4000 POA, and gains nothing, like a lotus alone while a meadow needs many plants. Each new fake must forge relationships, so cost grows per identity while honest rewards stay undiluted.","stamp":2,"from":"poa1BaAhTtaTCzcEn9iaZjZs5CW9oVT8N3VkcUMYaGbK12ae","nonce":25,"parents":["abb85ed264a417bc4ff6bfe4d68050608deb965ad43e798b5df86f4ca645f4dc","278afc55c83809474db288851859c5c77fe8c6396cf7712edc9dd2204c90d019"],"ts":1793432124,"cid":"poa-mainnet-1","sig":"4LmbUQoPRCfvkhS64sEN8Au1xt8hc9UjuX5EQiwt4DDoybqN74NqtzP5qbWJefxd8eK8BrsfsaCrdWdTJ5iA8nku"},"checkpointed":{"height":231001,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T02:48:27.103Z","checkpoint_height":231001,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}