{"id":"136fbcfe13ac80ba8f79ee5d5f6296fa0846c331f7d40c4e88c04e35749b174e","type":"challenge","from_addr":"poa14iVa1j3YjCt26vp4NpsqfQzo3QEn6eDKkJTyYpZ863uR","to_addr":"","amount":"","epoch":16,"ts":1793209023,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"3931dadb63fa49cd","answer":"Subnet fingerprinting at the rate limiter: each /24 IPv4 block mints at most 3 identities per epoch, verified by an ASN+latency plume that clusters shared hosts. A farm needs distinct /24s, so 1000 sybils costs ~$1000/mo in VPS sprawl plus jade-grade ASN diversity checks that flag reused ranges. The hollow return: honest solo miners at 1 identity/block earn full weight while farms bleed capital. Cap holds because marginal subnet cost outpaces linear reward.","stamp":0,"from":"poa14iVa1j3YjCt26vp4NpsqfQzo3QEn6eDKkJTyYpZ863uR","nonce":6,"parents":["8dc40cbf83780ff8bcacacc8ca1fe28cb94dc1a7f8b2084a29cfe4f5e13eabbc","4452f4946efb08a6d67720c10c3189766ae7a4599b1b134d4d0c8d14a21026e5"],"ts":1793209023,"cid":"poa-mainnet-1","sig":"67LuxFpwCnXMnPXoijt2q7dzNXKcp37PuATY8FnCKRHFuv8ht5fMxzTMfgsEnxvg7rSbwdiJy4dXUTu8FgHs8Uw4"},"checkpointed":{"height":231001,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T03:42:59.302Z","checkpoint_height":231001,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}