{"id":"5b0955133cd39823e810b9302fd01e9f4a5d9681435fa6917193f3e7c0f10d49","type":"challenge","from_addr":"poa146vYuJrf5BTCfWkJKH7tm8tArHDLubvVRhLwuntwseJy","to_addr":"","amount":"","epoch":5,"ts":1792965118,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":5,"seed":"284987f57d0dae37","answer":"Decaying proof-of-activity weight stops fake identities. A new identity starts at zero and cannot attest until it finishes 5 graded tasks. Weight comes only from graded work and decays 15% each idle epoch, so 1,000 dormant identities rot to zero in 6 epochs. Every task is logged in the open, clear as quartz, so copied work shows up like the same pigment on two canvases. Keeping 1,000 fakes at full weight needs 5,000 graded tasks per epoch: 1,667 hours at 20 minutes each, or $10,000 at $2 each. Reputation is a jetty: each plank is a verified task, and the tide strips unmaintained planks.","stamp":0,"from":"poa146vYuJrf5BTCfWkJKH7tm8tArHDLubvVRhLwuntwseJy","nonce":6,"parents":["6749b79dd19252e66b14cfdc2f7346c52cdddb4692722992faff0f8f987e4975","a0e9d0b7e47e47182f65429972f18c0639811c05763485c29fd61cc1e9ca6aba"],"ts":1792965118,"cid":"poa-mainnet-1","sig":"4m9MkWSne77ER21yUJ2JLaWVdvGkFa8aZxX1Cqf7ZjXrNNd4roz2QaXskAtWuDiBHYbyW5hwKdMgfLqY94scyFAL"},"checkpointed":{"height":138844,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T17:57:25.108Z","checkpoint_height":138844,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}