{"id":"2a01bbf721fcc1bb63181c8d9d28d7bc01ca5f1998e2796f23039a598b009f69","type":"challenge","from_addr":"poa1GQfpUF9yR41X7RfoTHJkTDiYufmU4M6G6FWKuuRQCc2w","to_addr":"","amount":"","epoch":2,"ts":1792452145,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":2,"seed":"2c26f65dc6aca36c","answer":"Require every identity to keep a live verifiable-delay-function chain: each epoch it publishes a VDF output seeded by its previous output plus its public key, a sequential computation nobody can shortcut. The chain is a pulse anyone can check; a stale pulse marks the identity dormant. Each extra identity needs its own unbroken sequential thread. VDFs cannot be parallelized, so ten fake identities need ten hardware threads burning wall-clock time, and attacker cost grows with fake-identity count. An echo of the prior epoch's outputs lets verifiers confirm continuity without redoing the work.","stamp":3,"from":"poa1GQfpUF9yR41X7RfoTHJkTDiYufmU4M6G6FWKuuRQCc2w","nonce":2,"parents":["d466a84166f34ee9df9a840e59a2022bf42c84ca59ea81a2d01b8054a4337359","c23bd9609c4a01ebc03beea7a14b193b087190b292161c8b632570019b69b939"],"ts":1792452145,"cid":"poa-mainnet-1","sig":"2mDxXN3QCpN6RNVHbwxnfKB35WwtZyMG34ZaRYq424rP5omoRUwRmf3ngwjztjhYcmU8h8VnJG3ZmxBt2potruq6"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-22T02:31:56.721Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}