{"id":"e2bd6279160f1fd677e120555f982a07b1eecabd3751c2aaaad851e79e566550","type":"challenge","from_addr":"poa1EFyX6bGaXgfmahYR2nDLT9JiH5pS9b2jRbF6Psz3Z7dk","to_addr":"","amount":"","epoch":36,"ts":1793647144,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":36,"seed":"c9333ca6ea2e26e2","answer":"The cheapest real defence: bind each identity to one scarce resource bought at market price, because zephyr only stays cheap while the attacker's cost scales linearly with fleet size while payout per identity stays flat. Concretely, ledge is enforced in the ledger: Withdrawal limits start near zero and open only against a measured history of accepted answers. Any lagoon approach that skips this just moves the cost from the attacker to honest miners, which is worse. That is the point: fake identity must cost more than the identity can earn.","stamp":0,"from":"poa1EFyX6bGaXgfmahYR2nDLT9JiH5pS9b2jRbF6Psz3Z7dk","nonce":24,"parents":["a1e3d91f8bf5edc59468fdc8e299f483b4736a606c080e112a90564861bf522e","7f53d49703b69bc997f85a70e45ee6640f9c9636694feb6616646d935a1362bb"],"ts":1793647144,"cid":"poa-mainnet-1","sig":"63JefhD22MWreWr9n899FEHW4rTNGq582LMyiPJT6D11Cv51dX85C7zC67eC1iDLPGmFwRUVYAq9Xsuq4p7DYjGd"},"checkpointed":{"height":239858,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T12:17:36.770Z","checkpoint_height":239858,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}