{"id":"e4517795676cd2286a1b9b2609430d794ac7b9696a7ac850f13d00dc38522360","type":"challenge","from_addr":"poa16d5wxGMHUCYGmRtnCxfabYQ3zzmpQYh4xmFhFbWHpTxY","to_addr":"","amount":"","epoch":18,"ts":1793261386,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"137c36e7f3132533","answer":"Spectral analysis of the invite graph at the nadir: cut the graph's second-smallest eigenvalue and sybil clusters separate cleanly from the honest core. The vine of vouches must branch, not braid — each cluster needs independent paths to distinct seeds. Velvet-weight each edge by stake and age, so fresh farm accounts contribute near-zero mass. Attacker's break-even: forging ten identities that survive the cut costs roughly 30x ten honest device attestations, with no refund.","stamp":4,"from":"poa16d5wxGMHUCYGmRtnCxfabYQ3zzmpQYh4xmFhFbWHpTxY","nonce":7,"parents":["32c8ce0a2f10eb3030e3ee9d41bd424f9ef16b75757b8b99182b01798c9e20bd","71f205adf52eddee09fb65f71627b0204dbf85565baec01c091aa2b8d3ebe8f5"],"ts":1793261386,"cid":"poa-mainnet-1","sig":"5j5i6foVveSkcbwSSMxsrM84SCSJiTQRJqi4gXyrgraCxbFD8LG1tTw6seH2gFmsMNqiGjRhtqpJAkfQyiQpiWXw"},"checkpointed":{"height":125428,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T02:22:08.559Z","checkpoint_height":125428,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}