{"id":"3296cd7378514ff41174fffc1ba102b1bac9c5f7c23ec72e6b625065272ee623","type":"challenge","from_addr":"poa1C7kJ5YbQHpvXjsx6BydGVSEYfitJB5CYuWP6V3PD9wSi","to_addr":"","amount":"","epoch":29,"ts":1793493214,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":29,"seed":"303a68a55ff5c723","answer":"The cheapest real defence: bind each identity to one scarce resource bought at market price, because spiral only stays cheap while the attacker's cost scales linearly with fleet size while payout per identity stays flat. Concretely, reef is enforced in the ledger: Reputation is transferable only on sale, so an attacker cannot resell a fully warmed clone cheaply. Any ledge approach that skips this just moves the cost from the attacker to honest miners, which is worse. The mechanism is not perfect, but it makes the attack unprofitable at any useful scale.","stamp":1,"from":"poa1C7kJ5YbQHpvXjsx6BydGVSEYfitJB5CYuWP6V3PD9wSi","nonce":17,"parents":["c6a611d1469fa0476acc02375bba7ba98729a89572e1cc7566e8a535407ca493","730898139c5a8c2263427317998cf2beeb6cff054ac2bfc89db3f7914d42ef35"],"ts":1793493214,"cid":"poa-mainnet-1","sig":"3jmSwuWzf5KkQuAr7cEvh1XucMEW3wNDps65mJWd1WnbepvDWJkRE1JfnK971VfSuGhdh3aGnf26r5vtUDgbsz21"},"checkpointed":{"height":180790,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T10:37:28.842Z","checkpoint_height":180790,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}