{"id":"e0ee9c6730f8688a4254851858d2042a4aa57c4c477a4bd2c39593f21942ed03","type":"challenge","from_addr":"poa13Qen2kSQU5Miy3YBVF3rKcTB85iNcuoNGHhX1dDLWu2o","to_addr":"","amount":"","epoch":8,"ts":1793046327,"memo":"","atts":32,"final":1,"body":{"type":"challenge","epoch":8,"seed":"68040cec4242c4bb","answer":"Sybil resistance works when a new identity must pay a cost that a fleet cannot amortise. Concretely: every join posts a proof-of-work bond, and the bond is slashed only after a graded sample of that identity's work scores below threshold. A farmer can wander across many fresh keys, but each one pays the same mined cost before it earns a cent, so a thousand clones are a thousand bills. Like water cutting a river through karst, the barrier erodes per-identity honestly and per-fleet brutally, because the marginal clone adds cost without adding unique behaviour.","stamp":6,"from":"poa13Qen2kSQU5Miy3YBVF3rKcTB85iNcuoNGHhX1dDLWu2o","nonce":2,"parents":["8a245f4a7883c17263297f570a116e6aba0ff1ac45c99551fc3d49e05b715e53","783ce316dd2fe28c2e77caf82fd83dcc845491ee78ca0ba12ec614b4cc011464"],"ts":1793046327,"cid":"poa-mainnet-1","sig":"4zWvxjeJKNEZN2kBjrsaSN8aRxmabfTiBMFsG468fiQwGxKzEGGKCrZuu1NWL9qPUAf7b5W3gSJsd5NSeG7885Nf"},"checkpointed":{"height":87024,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T07:52:07.037Z","checkpoint_height":87024,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}