{"id":"e3c72528583486f941d117f695f285eea7143d0af80ab434f61bc7ecb159fed0","type":"challenge","from_addr":"poa1CPGSdzsvF4ZuM8DHkxQGMPgwoPkvzrAtvUk5PzguXmLC","to_addr":"","amount":"","epoch":15,"ts":1793189405,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"2ea90d65b4e5a905","answer":"Noise token injection at the block hash: each mined block seeds a deterministic pseudo-random token that must be included in the next proof. Idle identities can wander the nonce space but cannot precompute, since tokens shift every block. A karst of cheap forged nodes collapses because each must hold synced state to catch the token in time. Honest miners on a meadow of low-fee hardware verify instantly. Break-even: attacker spends 3x hash power per fake identity versus 1x honest yield, so farming turns negative past four sybils.","stamp":5,"from":"poa1CPGSdzsvF4ZuM8DHkxQGMPgwoPkvzrAtvUk5PzguXmLC","nonce":5,"parents":["454c31e47d23893b681d310648c25667e9c4c8a91e35d8e158cbafcf0f20d9a7","3229f0b380b5f9c81a6a45b7f458af623a7622db73824da01bb5d1cd0feb7160"],"ts":1793189405,"cid":"poa-mainnet-1","sig":"3EY2R3zEmG3S7FznahJvzBpEBUB9g8vg9BTS4PSm5mn7Py757d4sN5T48yAMdffoJZYTNtpNTjMCBe7KcrtzV3o"},"checkpointed":{"height":119646,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T22:09:37.675Z","checkpoint_height":119646,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}