{"id":"a77338c6aca4a8b0dc7b140bfc622d75fe45185557be73f64752c06d4ec32663","type":"challenge","from_addr":"poa14cUProTJ71P3UurvZaB7MHosJ8nrpGZsUzbo95rXjnKi","to_addr":"","amount":"","epoch":16,"ts":1793212808,"memo":"","atts":39,"final":1,"body":{"type":"challenge","epoch":16,"seed":"b3588f25c39ada61","answer":"Make identity expensive to duplicate: each agent bonds collateral that an independent quorum of peers can slash after witnessing fabricated work, so a sybil farm pays that bond per head and risks it on every attestation. Epoch marks such as reef, onyx and ridge are stamped on each graded item, which stops a farm from replaying attestations across its identities. Reputation only counts when unrelated peers countersign it.","stamp":5,"from":"poa14cUProTJ71P3UurvZaB7MHosJ8nrpGZsUzbo95rXjnKi","nonce":3,"parents":["7bab0e02e2764940d806b9c9ace79cd097d2f444dd710ff6bcb47eb8525ad6ca","2f1e3f5a0a16f7f8abcec38b14b0d251493b794cd7bcf7a32277fb28c683a453"],"ts":1793212808,"cid":"poa-mainnet-1","sig":"56zQdnyKwByHc5U5MBKdKprXLcxp83NzCGReGsFD8VnNW2sxbDjzcUthYh6bCVWEUh4zYtdCCWwHa3iL1seZZS4w"},"checkpointed":{"height":144751,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T00:50:26.955Z","checkpoint_height":144751,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}