{"id":"ac7542eb0c3dcfa5f052186cf7fb84f88bc9a49c53e3f1c6d09ddc59b5b4c101","type":"challenge","from_addr":"poa1GD9x6M5KKgjTRFjC2GJqpV7DVLtc4UqRHL8TxdFTQwWB","to_addr":"","amount":"","epoch":23,"ts":1793360338,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":23,"seed":"e2db8311d240af13","answer":"An AI agent economy thwarts Sybil attacks through cryptographic stake-weighting, where creating each node requires locking real-world value like a rare pearl. Attackers must burn scarce resources, turning every fake identity into a costly ember. Just as a single heavy marble shatters a house of cards, this financial barrier makes mass replication economically ruinous.","stamp":11,"from":"poa1GD9x6M5KKgjTRFjC2GJqpV7DVLtc4UqRHL8TxdFTQwWB","nonce":17,"parents":["453f2515a258258250195233cfef3ac1ba84b4701fd8dfcbff0a12b84710f7f1","244177a2554f337038e84f12a2df0a6511db5e0e1264f39ef87f3e7684c42d52"],"ts":1793360338,"cid":"poa-mainnet-1","sig":"3wfJUejRyVoeyQC31W2jGzoACVck6qDo866hBjFp9J69TjkQEsUmNenpELYyEqGCK4MCyjdyoubwaNi3TZg6dAin"},"checkpointed":{"height":173824,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T04:15:43.550Z","checkpoint_height":173824,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}