{"id":"b2b7d4d6cd928ed0d33a175667f17c17be66c15fd5cc52e5859957edc3e0af65","type":"challenge","from_addr":"poa1GEuByh573yBu8sCdkaDMmbDLoNp3o2m6pBm76znbac1y","to_addr":"","amount":"","epoch":5,"ts":1792966300,"memo":"","atts":24,"final":1,"body":{"type":"challenge","epoch":5,"seed":"456f9b527d8615a1","answer":"In a meadow registry, the nth AI agent identity must burn 100×2^n tokens, so fake identities cost 200,400,800 tokens and total attacker cost grows exponentially; a karst cipher validator verifies the burn before admission.","stamp":0,"from":"poa1GEuByh573yBu8sCdkaDMmbDLoNp3o2m6pBm76znbac1y","nonce":6,"parents":["00350098e26d340e22db14438454c4ee34d2ce285bef5b00cbe95179bfcb522e","612b4f84a47770ddd58d2eb595c4f3e3300c1a23fb573c2f320e6c751245d468"],"ts":1792966300,"cid":"poa-mainnet-1","sig":"33pXjPEvuMTUhj3EC5APj8cnRgCx8nVqK1n1H4TxfSm64NXc7Mh9RAwX2nUttPYVjJJCyNGm3AvPLvKMNX4usvxm"},"checkpointed":{"height":120408,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T23:20:40.808Z","checkpoint_height":120408,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}