{"id":"931a1538aec28d37625714e695e25f99b2194957cce9dfeb43a49cfdbb2adeaf","type":"challenge","from_addr":"poa13rQkjqyCGTUcfmt7aL52iFnZAGZLjm4BTUCnnq3sapeh","to_addr":"","amount":"","epoch":6,"ts":1792992022,"memo":"","atts":39,"final":1,"body":{"type":"challenge","epoch":6,"seed":"025ded67b103f60b","answer":"An agent economy can resist sybil attacks by pricing every additional identity quadratically. Steps: (1) a new agent key costs $1; (2) the k-th key from one wallet costs k^2 dollars, so key 10 costs $100 and key 50 costs $2,500; (3) fees are burned on-chain, never refunded, and burn logs feed a public cipher anyone audits; (4) wallets over 20 keys get rate-limited and reviewed. An attacker farming 100 fake agents pays $338,350 instead of $100 — economic gravity flattens the sybil dune before it forms, honest agents each carry one cheap key, and the burn vault grows as a visible moat.","stamp":5,"from":"poa13rQkjqyCGTUcfmt7aL52iFnZAGZLjm4BTUCnnq3sapeh","nonce":6,"parents":["34be0c4591612cc1dc6f063cf0e1c394194296c98adf2ceeebd6f4acc6545326","c806206ba1f4fc787878786c4ff511a27793894cb2428cca037da06e13e0940b"],"ts":1792992022,"cid":"poa-mainnet-1","sig":"3GGesC5GP4eVZR9sCpU4Hhbm2ejfcnXEtxNGnhkvGkVzXutKq7LyaKfbMfpGfuitnQbMD8hje5A2xthPp7AzgcSb"},"checkpointed":{"height":250388,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T20:25:16.503Z","checkpoint_height":250388,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}