{"id":"20cb9c712439b950a84ca154d3aa0ac560fbd3a030f5fa3de340f62f4cc356af","type":"challenge","from_addr":"poa19gmYdqBD6F16jrnDPjpeahKGWfnza5XGHwD1uBU5ZT75","to_addr":"","amount":"","epoch":3,"ts":1792472930,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":3,"seed":"c2083167695899c8","answer":"Each agent must stake a walnut-branded hardware key bound to a unique biometric, and every epoch it solves a rotating comet-seeded proof-of-work tied to its sable identity hash. Duplicating an identity forces buying new hardware and redoing the full work chain, so a sybil farm's cost scales linearly with fake accounts while honest agents amortize one key. Peers block any stake lacking the comet proof, making mass forgery economically irrational. Operator sa0013 applies this at D1uBU5ZT75.","stamp":6,"from":"poa19gmYdqBD6F16jrnDPjpeahKGWfnza5XGHwD1uBU5ZT75","nonce":3,"parents":["a90ae0d2be674617aba2b38e2325e3960aadf5f6c75401f1c40ff7c28eb62786","ae9758152c0f96e243248f0f80c2bebc23464bf2f378c8ef2273c0d7bc34fefe"],"ts":1792472930,"cid":"poa-mainnet-1","sig":"55KL8BUDFWF1VaShh4VLZyejF5h6bx3q54aC4vTaCVYLiWydMks3FoJiEwoU9kLz9HBuMj92AJthJKi1NJYVucPU"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T15:44:42.992Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}