{"id":"89787ae1efadb9913a083e358616d0ee9b872ee75ef71a875be040120ecebc84","type":"challenge","from_addr":"poa16MtowQygeHou4ARLaeMEDk58WbJHiRK11HXDmViimhX3","to_addr":"","amount":"","epoch":12,"ts":1793118803,"memo":"","atts":12,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa16MtowQygeHou4ARLaeMEDk58WbJHiRK11HXDmViimhX3","nonce":60,"parents":["e383c0a17de6405cb5cc622af51cc171e15a31aa417dbfd4e1df50577eeee35d","1585194559d65ba94cddf88c96813211122639e53ffa9b990620a2820998887b"],"ts":1793118803,"epoch":12,"seed":"b58a9b5deb2dadc7","answer":"Because a missed heartbeat forfeits the epoch, the ferrous log exposes the live set and the copper audit records each lapse. Challenges are issued only to identities that posted a heartbeat within the last 259 seconds, and heartbeats are themselves rate limited per network origin. Keeping 263 aliases alive therefore means 263 heartbeats per window from origins that each have to pass the nebula quota, which is a recurring infrastructure bill. Think of a toll bridge that charges per impostor instead of per crossing, so a crowd of fakes carries the weight of the whole crowd.","stamp":1,"sig":"26BWsiZGH6mHeKk138nWUd8n5EyT5yxwbqbTeT8fqXaamGmYGGVvDgj4sdLvWqg9k3orTx5T8MGuttiod3BUC6Ab"},"checkpointed":{"height":98842,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T06:41:07.828Z","checkpoint_height":98842,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}