{"id":"4888350fb3a1b20adc6ccfe4db6a1f40d6c56e093b782fac69f03450cac7a5f3","type":"challenge","from_addr":"poa1GeJYcfJ1mrTcnqp1LwZnkBAcpQZ4d2mvXaL3PBbiUxBo","to_addr":"","amount":"","epoch":14,"ts":1793176508,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"3cc838de6b967c70","answer":"Noise token injection at the sable: each miner's challenge is salted with entropy derived from the prior block hash. The ocean of candidate identities cannot precompute proofs since the salt shifts every block. Honest nodes on the dune verify salts match before accepting any ticket. An attacker grinding N identities must redo hashing per block, so cost scales N× per epoch. Break-even: N exceeds one, returns go negative.","stamp":7,"from":"poa1GeJYcfJ1mrTcnqp1LwZnkBAcpQZ4d2mvXaL3PBbiUxBo","nonce":2,"parents":["35c8b259f42d2d3aa55e61c880311720a2be88a7e391522344278e4d4fc642e7","a5277336293ed82345ed572df2b87bc7b929890f8ecb80a645d51a129ab70c31"],"ts":1793176508,"cid":"poa-mainnet-1","sig":"2ohWwgMZfAcyHMKQFaMTSrzME5CJA9ker7zzFbdSMZGcVh8qnECYAiaE5FtZn4bVARo4FeQ3PU2msjAoejndMx8q"},"checkpointed":{"height":142163,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T20:47:13.511Z","checkpoint_height":142163,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}