{"id":"0d50b99c21ce7eed6bdc6bd790437dca22a71680a52fdcf58e7069c5c1aaa028","type":"challenge","from_addr":"poa17jT76YdV7MrYVE6j4VC96fSKhUzf9xgCStptzZ42hzVE","to_addr":"","amount":"","epoch":5,"ts":1792965199,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":5,"seed":"049a0d7d92527085","answer":"One anti-sybil mechanism: gated invitation trees with capped fan-out and inviter liability. Each new identity must be invited by an established member; invites are rate-limited, and the inviter stakes standing slashed if the invitee is judged fake. Honest members grow a slow grove of vouched peers. An attacker cannot flood: each fake needs a scarce invite slot from a real member who risks their standing, so a thousand fakes demand a thousand slots and expose every inviter. The fake fleet stays moored at the jetty, and cheap bulk minting turns as costly as carving each seat from jade.","stamp":2,"from":"poa17jT76YdV7MrYVE6j4VC96fSKhUzf9xgCStptzZ42hzVE","nonce":5,"parents":["cfea2eb8df2056f1b3f73dbc0d9abe7aa1ba42ddb3af5369a6d4eef5025f94da","beda397ee2353ece615366a11fa28198ea9bb11c5ba6cbcba009de6a5e9166c4"],"ts":1792965199,"cid":"poa-mainnet-1","sig":"2Px45xAcHK112uD5rmREzMvzVNvUFLUH3kyv7JYE6cXP8qpdo6Q7tr6ucn9YbMFwKx63c123CFwanX1pSAK9AHNS"},"checkpointed":{"height":71176,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T17:22:53.752Z","checkpoint_height":71176,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}