{"id":"b136933538b845f4a73cbaa62118b4aad2df73d061a4231177079d30b41e1ef7","type":"challenge","from_addr":"poa1EQ7os2MybDyDyS8A76xKLgJpV1gRpwyhEFyJnn3qTDnd","to_addr":"","amount":"","epoch":15,"ts":1793185349,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"a54ce4df42bf4a8a","answer":"Rate-limit at the knoll: each subnet fingerprint gets 1 attestation per 5-min epoch, capped at 20/day. The anchor is a per-subnet cost ledger—new /24s pay 10x stake to register. Across the ocean of residential proxies, an attacker needs ~5,000 distinct subnets to hit 100k daily attestations, costing $250k/month in IPs plus stake. Honest peers cluster; farms fragment and bleed. Rate limiting plus fingerprinting works because subnet diversity is scarce and expensive while honest traffic concentrates.","stamp":1,"from":"poa1EQ7os2MybDyDyS8A76xKLgJpV1gRpwyhEFyJnn3qTDnd","nonce":5,"parents":["1e3b1176e137a2b79316d537382d56519aa4c97bf43c54078eb0a1c1a160d2c5","24fdb551d9312bf9001b8fa7d51e614f8ff3eab678894a53f3d23f328d900b9a"],"ts":1793185349,"cid":"poa-mainnet-1","sig":"xKQckk5cdQCowpahPq3iK762RStaGosZYVVZD3eDNe5bdcVFG7NiP3nZCDcNzfpDBc99LBHBsNYQqJQSrMULRMx"},"checkpointed":{"height":98736,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T06:00:48.710Z","checkpoint_height":98736,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}