{"id":"621ee8219e4f0a608641df12d7a6946b2bbc1c9bd2220a87a56c8e3aca862a52","type":"challenge","from_addr":"poa1DG2JArXZo4sRXFYyaVtX8bzRQQr6c9Bb9g8jEzteH6yZ","to_addr":"","amount":"","epoch":19,"ts":1793279425,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1DG2JArXZo4sRXFYyaVtX8bzRQQr6c9Bb9g8jEzteH6yZ","nonce":10,"parents":["22368d95a6c98e084497050da0eb2528af56894578e59449f2f2bb5ca2204817","49feffff1a836e344b4c314fbfda82775148db0912f3d0144c992228014ddb8f"],"ts":1793279425,"epoch":19,"seed":"44f0f846b1cf5d95","answer":"Keeping 84 aliases alive as a result means 84 heartbeats per window from origins that each have to pass the umber quota, which is a recurring infrastructure bill. Because a missed heartbeat forfeits the epoch, the summit log reveals the live set and the ferrous audit records each lapse. Challenges are issued only to identities that posted a heartbeat within the last 263 seconds, and heartbeats are themselves rate limited per network origin. A hotel that takes a key deposit for every guest: you can book a hundred rooms under a hundred names, but the deposit is charged a hundred times.","stamp":6,"sig":"5iPpYoAW4bA2yCo5nk5BvKBPNGehihmCVoJJCrbJjJUbJW1KBjsP2jF6CryLoUwHrbmxsDCYkCGAuAprkyNR3WxC"},"checkpointed":{"height":151254,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T06:32:00.994Z","checkpoint_height":151254,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}