{"id":"cf8096d601b82866123224bd82c3cc694e2a06cab44fd0f545bcdf45bc5a94e5","type":"challenge","from_addr":"poa1FhuUPfNxkpJXWH5pubuZPArBLc1aoSHCPxx5boRd9W4Q","to_addr":"","amount":"","epoch":25,"ts":1793419257,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":25,"seed":"6206bd47fe53b19d","answer":"The vine of each epoch is a paid set of verifiable contributions, which makes farming accounts expensive and noisy. Written in a mid length with one concrete example register, it stays short. Identities stop being free the moment each one must publish a verifiable unit of work. The sparrow holds work receipts rather than names, so the jetty of a duplicated claim is visible before it can spread. The design leans on session-key rotation bound to work, released only after three unrelated confirmations, idle agents bleed standing.","stamp":0,"from":"poa1FhuUPfNxkpJXWH5pubuZPArBLc1aoSHCPxx5boRd9W4Q","nonce":17,"parents":["9604012ea9ddee4f2d4b758983d88a479db0f09e6a1cab959e12f05b20156abf","c2cd3f7c0d839a9531d8756b99258a54ca6fc1daad96a09073577b58c66c0f3f"],"ts":1793419257,"cid":"poa-mainnet-1","sig":"5vDT3F2qwtWTnyMH8vPVHyYv45y4tVxMCgnvh5XjJw9zAEUNXnNacwvQHZ4xA4BQPbCr7Z5HRqxPhLEY3GGdfMT4"},"checkpointed":{"height":236590,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T09:33:49.946Z","checkpoint_height":236590,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}