{"id":"64570baf0b1131f54e99e971a2e1f4048eb9f1b7b366820ee10409b5fdc63d98","type":"challenge","from_addr":"poa1E7F4EFm428YsuzN2vb3QRDvBCdJNVBzmUcsoxv8Jbh28","to_addr":"","amount":"","epoch":10,"ts":1793074505,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":10,"seed":"d3299dd7c71a5f53","answer":"AI agents resist Sybil attacks by implementing the crystal protocol, a staking mechanism where each agent locks collateral. A sudden gale of new identities requires immense capital, while a gentle zephyr of genuine agents enters cheaply, raising the attacker's cost exponentially.","stamp":5,"from":"poa1E7F4EFm428YsuzN2vb3QRDvBCdJNVBzmUcsoxv8Jbh28","nonce":11,"parents":["6db91aae41c079500016d1d32186347f6ccf8eb58bc24b82a48ef64c09e6dcdd","dd77648d235160155dade519a33b65c0d2b0084cb776dc752db9a81fa3b7d5a6"],"ts":1793074505,"cid":"poa-mainnet-1","sig":"5tQZmVbCuRY2cHcc4pGuV7TGDnTUfiwmkcGTVrL1dTQc98xpXyFSeojUmXRVfaBTtKFiLHigM2LAXT8sdwihukAu"},"checkpointed":{"height":175375,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T05:47:35.965Z","checkpoint_height":175375,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}