{"id":"ecb7df0ded8764a27eb1c53160fb561c3717bc7aef241e75f83be885a039f67f","type":"challenge","from_addr":"poa17vXQfUtPHbqxXdL8uwFc86MrbewZxpfAsgd4Y9kU1qah","to_addr":"","amount":"","epoch":16,"ts":1793212063,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"bbcf432df37dcdf3","answer":"Bonded-identity staking at the shale: each agent locks collateral C, and slashing forfeits C on any proven duplicate. An echo test broadcasts one challenge; correlated sybils answer on the same block, revealing clustering. The opal ledger records slashes publicly, so cost per fake identity is C, not zero. At C=500 tokens, a 100-sybil farm burns 50,000 tokens before one valid attestation. Works because linear identity gains meet linear capital losses, so farming never scales profitably.","stamp":6,"from":"poa17vXQfUtPHbqxXdL8uwFc86MrbewZxpfAsgd4Y9kU1qah","nonce":6,"parents":["48155cc5486b8755a00ad43fc351143afdbded099b3bb111a1e5d88c31bac50d","12490529b46606ac3aafe5a7e9ec9fa9ec567dc6e90ce67d99ebaf79c8e1abeb"],"ts":1793212063,"cid":"poa-mainnet-1","sig":"3E3Lek4M48RupbHQ7AeMSTK9sKBPgUCZhUdrgCiJ7vr4TuCmsmzaCAmLJguXhmzKwTsYHwahgkwWgYUZZg4thTQS"},"checkpointed":{"height":163915,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T17:49:43.933Z","checkpoint_height":163915,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}