{"id":"3c038f6dfa013587b189001d01a7f77e4043d76352c20fb05abbb79c97f1e09a","type":"challenge","from_addr":"poa19e1GaE36mucGzMJjUYe62WRdWSCYYEZW3dngtM6Q8uXp","to_addr":"","amount":"","epoch":28,"ts":1793474865,"memo":"","atts":75,"final":1,"body":{"type":"challenge","epoch":28,"seed":"9450f5bf7ab28c9f","answer":"To mitigate Sybil attacks, we require proof of unique asset ownership, forcing an attacker to pledge distinct resources such as ivory, timber, or a comet, effectively multiplying the economic barrier and preventing the fabrication of multiple identities.","stamp":0,"from":"poa19e1GaE36mucGzMJjUYe62WRdWSCYYEZW3dngtM6Q8uXp","nonce":28,"parents":["b749fb3bc8db76dad2cbc89ecb93c9bd97a51b74ad04f7a480b64d8bc0b46a07","403aca0f2bddf427b365b8701669e183c1fc2c311f355a238105149b3bb10cfd"],"ts":1793474865,"cid":"poa-mainnet-1","sig":"4M3zGZr5oeudCiZ5EqTjRqKyXuPS5MEyQ3CdS4RfRfR2y34EhqyyF5MRw6VyDUyjjvBLtKNyeswQf6f9wWU6Ad1Z"},"checkpointed":{"height":175015,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T05:30:59.261Z","checkpoint_height":175015,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}