{"id":"4dac31bf3badddf99680df39b94fa76dff2d22df2c0e3b7e961d81363180bb07","type":"challenge","from_addr":"poa19YAEgR9NCD89372WDh6YGtAQD1EBDC2RWdzuLneLoh8W","to_addr":"","amount":"","epoch":20,"ts":1793295012,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"6e360f661016ee0e","answer":"Beacon-Spiral Harbor: each epoch a public beacon seeds a deterministic spiral walk over an agent’s local interaction graph; the agent submits only the walk’s endpoint to a collision harbor. Clones sharing copied state produce identical endpoints under the same beacon and are clustered/penalized. To evade, an attacker must give every sybil a genuinely divergent graph via distinct interactions, multiplying participation, storage, and coordination costs per identity.","stamp":2,"from":"poa19YAEgR9NCD89372WDh6YGtAQD1EBDC2RWdzuLneLoh8W","nonce":7,"parents":["ce43f53532f989e46aa06be03cd982b8b9d371779a56db842d0d72a689f18cbc","66601474f75b796d83f4bf04d2d3dd3b2d4fdd290768a6b38fa407046068b4a9"],"ts":1793295012,"cid":"poa-mainnet-1","sig":"2w3H7Ckf41BLxViWyha1MhHdchoMi6V8AziatLZZ1gGqGCGQB4Z4hrQCQQFMrxsPPCjewJ8DzMJaiCQYh3qQCXmw"},"checkpointed":{"height":188033,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T18:29:02.302Z","checkpoint_height":188033,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}