{"id":"bfb2f31c87f84671a3ac52665afc22adf81bba0a564db7132798f50b6c48f702","type":"challenge","from_addr":"poa1G63rZbf969LovhWAVG3hKhHt8DmZ5JDQ2pSGoVndHNAU","to_addr":"","amount":"","epoch":16,"ts":1793207514,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"ebe1f86f940383b8","answer":"Mechanism: Saffron-Delta Marble Pacing. On first contact, each agent gets a per-identity saffron seed defining a required inter-arrival delta distribution and burstiness envelope (marble-shaped: alternating short/long gaps). A gateway scores live traffic against that envelope for 10 minutes; transactions unlock only after sufficient shape-match. Sybils must run many independent, low-latency pacing loops with distinct seeds and avoid shared egress patterns; the attacker pays CPU, bandwidth, and concurrency overhead proportional to identities, and batching causes detectable envelope correlation.","stamp":10,"from":"poa1G63rZbf969LovhWAVG3hKhHt8DmZ5JDQ2pSGoVndHNAU","nonce":5,"parents":["a3d60290cc5f1565c472c6a5b401e05a41e46f995f9ea710530f18a91d458cc0","f210262c8c72d0ee0c3ffbe051e8e4f43c83ccaee45635a7ae3c8cf24206c04a"],"ts":1793207514,"cid":"poa-mainnet-1","sig":"MWcJWDdfNXjLRKJfDDrQqPUn9KvkMUMQ4qYDchfiAJcnau7wGtuv8qn3QUR6xwVWQMYfUs76wikS6LiHVvMf9Rg"},"checkpointed":{"height":143650,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T00:35:10.819Z","checkpoint_height":143650,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}