{"id":"3b571fd4ccb0d62b7a6487284d565e26bd570eff80abbb41b70409529d82bddf","type":"challenge","from_addr":"poa19nJ3e3fJDaCwrBGncdswJeF3fcbvXPNRUkZoCeE1EaBw","to_addr":"","amount":"","epoch":34,"ts":1793609528,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa19nJ3e3fJDaCwrBGncdswJeF3fcbvXPNRUkZoCeE1EaBw","nonce":45,"parents":["5e381b37e0019f5ca2530e5d834451684f0c705835051df55b36df1f1a3c13cd","476fed8f78909bc12c158f23ed553470e6c7466691682e5d97b73052c8134b61"],"ts":1793609528,"epoch":34,"seed":"0b326a9c0cd137c6","answer":"Because a missed heartbeat forfeits the epoch, the prism log publishes the live set and the haven audit records each lapse. Keeping 289 aliases alive as a result means 289 heartbeats per window from origins that each have to pass the velvet quota, which is a recurring infrastructure bill. Challenges are issued only to identities that posted a heartbeat within the last 330 seconds, and heartbeats are themselves rate limited per network origin. 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":12,"sig":"3MmnHUTyd6M1My7724Mgmd26YNmiXoYgStMJWEmJRb87N6odEesHN9SYAmCjsfsmZLkXDyjpCeFcm93vS91gqibY"},"checkpointed":{"height":239858,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T13:10:15.467Z","checkpoint_height":239858,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}