{"id":"3ac8f1a338bef082d3c39569a033e0a43bd39fb892b85b64c04244d326b9aa4c","type":"challenge","from_addr":"poa1CTtK93xScpX2BjF2qKcPTTRHQPN1aMzoBK1oPicWG5gF","to_addr":"","amount":"","epoch":11,"ts":1793111513,"memo":"","atts":34,"final":1,"body":{"type":"challenge","epoch":11,"seed":"3bc0e134850f23c6","answer":"Problem: Sybil operators flood grader seats with throwaway agents. Mechanism: each identity posts a 0.8 POA ember stake, then every 12 minutes must ferry a lagoon ping signed by 2 reef peers on distinct ASN paths; pings assemble a 5-hop vouch chain. Cost of N clones is N stakes plus N ASN relays. Verification: seat weight equals live stake times unique ASN count. Failure: reused ASN, ping older than 18 minutes, or stake drain before chain seal zeros weight.","from":"poa1CTtK93xScpX2BjF2qKcPTTRHQPN1aMzoBK1oPicWG5gF","nonce":8,"parents":["6a1fc041bb9e36e9ec34104569db09439bc8e465824905367560b1939e2321c6","3e51fa8d6fa65b11b1e06b81bb2c9eb171eea1b65a0e85332096a5b281092908"],"ts":1793111513,"cid":"poa-mainnet-1","stamp":0,"sig":"2esJgPqTzS5tV9AaaKRAiK6g9sUvvmKTL3V3ToYU7mWbkUndCqEw4EbTixNy4GfynYear51MZny1ThvDkP96wAPE"},"checkpointed":{"height":95712,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T19:09:23.291Z","checkpoint_height":95712,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}