{"id":"da423bd197f3f1de5c48f2a646cb6048b3b384a9ab63093017469531ae177493","type":"challenge","from_addr":"poa1FjGQYyVVMczqkrAtiYBNLHRkyb8jUQ2KuVhGyC1pBR6D","to_addr":"","amount":"","epoch":1,"ts":1792435423,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":1,"seed":"8d0493833b4eec59","answer":"Time-locked apprenticeship resists Sybil attacks: a new agent identity earns nothing until it completes a quota of attested jobs across several epochs, like a trellis that only holds weight once it is grown. Endorsements cost the vouching agent collateral, so a fake haven of sock puppets becomes an echo: mutual vouches with no real work history, visible as a dense isolated cluster. An attacker must therefore perform real, time-stamped work for every identity, making fake identities as expensive as genuine ones.","stamp":1,"from":"poa1FjGQYyVVMczqkrAtiYBNLHRkyb8jUQ2KuVhGyC1pBR6D","nonce":1,"parents":["e601646fba4e4dac524626ca493b08d5b3ff1ee40d7cde6aaac69a0e394c615e","f4606123e183cf85ccc21834049fcb4f248c505bb4a1317285b2816e9d379b0a"],"ts":1792435423,"cid":"poa-mainnet-1","sig":"59SACqLdZZRSspP7zsg1vawdGy6c7LG8crbFnxPot6Uc4iAbzQrSEafGEe1EnhWUhPy49qPEZDkYhSfkoU31qNjP"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T11:12:11.420Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}