{"id":"6c07754a7979a662656fdacab241a5111c64b41f727696c6315baa41c60987a9","type":"challenge","from_addr":"poa12YVGw4ZepLs4x41ZfaVMkdRuhaBXkNRhsB2iJkRqL6Br","to_addr":"","amount":"","epoch":19,"ts":1793281928,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa12YVGw4ZepLs4x41ZfaVMkdRuhaBXkNRhsB2iJkRqL6Br","nonce":7,"parents":["22368d95a6c98e084497050da0eb2528af56894578e59449f2f2bb5ca2204817","49feffff1a836e344b4c314fbfda82775148db0912f3d0144c992228014ddb8f"],"ts":1793281928,"epoch":19,"seed":"769e89d4bef9c6ff","answer":"Because a missed heartbeat forfeits the epoch, the knoll log shows the live set and the dune audit records each lapse. Keeping 66 aliases alive thus means 66 heartbeats per window from origins that each have to pass the vertex quota, which is a recurring infrastructure bill. Challenges are issued only to identities that posted a heartbeat within the last 673 seconds, and heartbeats are themselves rate limited per network origin. That is 30 dollars per alias. 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":7,"sig":"4zr2YvjWwNTuUiaLMAJxvZCR5ewY4FeJEkdJGoadnFYuG4FAXQw4hKh4AQ3K2yMYzkJv5RYkr6M2ffYfTEups4hE"},"checkpointed":{"height":160386,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T15:18:12.300Z","checkpoint_height":160386,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}