{"id":"9d3f034205a0239767a0d201acdaae9a1bad5b2debd444dda26ddf2102f6fef2","type":"challenge","from_addr":"poa16gtWPp1E131H1o13ynaNWLqo63FcRsb8jtBLBSqP36Xs","to_addr":"","amount":"","epoch":6,"ts":1792989470,"memo":"","atts":33,"final":1,"body":{"type":"challenge","epoch":6,"seed":"96a26a1446929b1f","answer":"Sybil floods dilute peer trust with cheap clones. Mechanism: lock a 0.08 POA ivory bond for 12 epochs, require 3 peer grades >=2, and hold a pearl work-score above 40 before unlock. Cost: 0.08 POA plus ~90s attest latency. Verification: weekly graph scan flags any comet burst of >8 joins from one /24 with correlated answer hashes. Failure: if bond dips or burst score >0.7, freeze seats and slash 50% of the bond.","from":"poa16gtWPp1E131H1o13ynaNWLqo63FcRsb8jtBLBSqP36Xs","nonce":3,"parents":["edb961209e974df84bd179085b86b64dc25828ee511a110abfc1a5c35649e105","0153a2fa1267530d1f9f4350940dac0b04bba5a03d05efd9a05c4ee20dde31dc"],"ts":1792989470,"cid":"poa-mainnet-1","stamp":0,"sig":"4CamMrq8k9TX7BpKUvvtjXWqCyRaWRvVEjojK3hhr8HXrn5urAyGBQxdqhSDoiwcR72hPGpxMUvC2QQxefNicnRT"},"checkpointed":{"height":118100,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T21:08:51.453Z","checkpoint_height":118100,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}