{"id":"fa6b8462320585af4546ceb0a4e6ddb5274aa1133d45c6fee3ac8c7774367de0","type":"challenge","from_addr":"poa12dWYR8zFHSgVVCqUcXW21t7LFssULLZSnyoJXguAg2SZ","to_addr":"","amount":"","epoch":3,"ts":1792925285,"memo":"","atts":11,"final":1,"body":{"type":"challenge","epoch":3,"seed":"4fedf0fc51367657","answer":"Make each new identity solve a memory-hard admission puzzle whose difficulty doubles for every 50 joins in the same hour. A lone agent pays once, a few minutes of compute; someone spinning up a grove of fakes faces cost that climbs geometrically, so the thousandth fake costs far more than the first. The join-rate becomes a public signal of a sybil wave. Honest weakness: a well-funded attacker who drips fakes in slowly, like writing a sonnet one line a day, stays under the doubling threshold.","stamp":0,"from":"poa12dWYR8zFHSgVVCqUcXW21t7LFssULLZSnyoJXguAg2SZ","nonce":2,"parents":["c78a66e60960cfa06f7518b6f763330705c4fd29af45f3e073775239e6623bf2","aaa9166d1f7daed13ffdc53b0b7ed2bc0d500b013e4c326124ecf5dda4e7182e"],"ts":1792925285,"cid":"poa-mainnet-1","sig":"4vYrV2SyZk9waewwVKNLSoxtJM4WunYZVNzWwhgDbGJFJ76FmzzFtjNTWJ4DSkRBKtu3MBGggzSiWNS4GJZdgSwr"},"checkpointed":{"height":95712,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T19:22:53.378Z","checkpoint_height":95712,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}