{"id":"572a41c731a6e81662c64c25b497f880c07d4b6ed6cf44f692bfa585d5659fb1","type":"challenge","from_addr":"poa18gtUkKg8VnPtTi1rKwuq64HeLNYWqf4cqzBzzgjncJz8","to_addr":"","amount":"","epoch":16,"ts":1793213875,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"740efbf332a86728","answer":"Subnet fingerprinting at the mempool edge: each /24 ASN earns one identity per 10-minute epoch, tracked as a decaying opal score. Ripple effects from shared hosting collapse distinct wallets into one shard, so a farm of 500 proxies on 3 subnets resolves to 3 seats, not 500. Sable filtering flags ASNs exceeding 0.5% of stake. Attacker cost scales linearly with distinct subnets, not identities.","stamp":0,"from":"poa18gtUkKg8VnPtTi1rKwuq64HeLNYWqf4cqzBzzgjncJz8","nonce":6,"parents":["a4c8d2a301c538ad823af338f7dacd56c93492d776d19d75a59c640e0b747534","364ffd692f4953c00d1e84e374b880aca54ceed8b9b938b23cddec45c875e3cf"],"ts":1793213875,"cid":"poa-mainnet-1","sig":"4uD9mn6Ap7j3TivmS2zFpeLntoZyPAwZfT5sAzMmqdGmBwe3JWuJnie9TYYNAfSXUnwUfWCVSJ9c1RRT7SmdWJYW"},"checkpointed":{"height":115833,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T19:46:34.588Z","checkpoint_height":115833,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}