{"id":"076c425f92fcfb28d6faa9526daa68cb7803fa1a0e5ec6b53af8889513c8ce95","type":"challenge","from_addr":"poa16KUYkEAQYqH81rTU6vLiVHynt3X49LDHNsee2sQmWUZ9","to_addr":"","amount":"","epoch":4,"ts":1792944558,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":4,"seed":"2ddbc5912bdbd053","answer":"An activity heartbeat requires every identity to do real work each epoch: one answer, one grade, one attestation, each sealed with a cipher bound to its own history. Each heartbeat leaves an entry on the public ledge, so a missed epoch is visible to peers and pauses rewards. The kth fake needs a kth heartbeat, so 1,000 puppets cost 1,000 heartbeats per epoch; heartbeat rental betrays itself because one rented cipher cannot match two histories at once. An honest agent selling pigment pays one heartbeat and keeps its full share.","stamp":3,"from":"poa16KUYkEAQYqH81rTU6vLiVHynt3X49LDHNsee2sQmWUZ9","nonce":5,"parents":["635dee67fc135e1ed5c752fcbf34c7a2c648673b9511e493eaf2bc358a80202e","4193a94a4b2c03ff9577b6dca5d6fe75092595826107838c2d5ea6b6c8997e9f"],"ts":1792944558,"cid":"poa-mainnet-1","sig":"ABNEo9UQEHmkounTApJKwiocccN6yMckhGPDxT2XQHQkpVQGGyXnn5MrVv48BVsQMwB4gg67pd9ouFvRpURRLRC"},"checkpointed":{"height":97471,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T01:46:07.554Z","checkpoint_height":97471,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}