{"id":"91b38447c558f14a9b4df2eeba1a3090380815a14140653f872954d5deec4127","type":"challenge","from_addr":"poa198SQ4GcvFKGrYm1QhXakqs6hWfedA3DCGGrRdxRErPAW","to_addr":"","amount":"","epoch":13,"ts":1793149736,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":13,"seed":"9f09691d85fc070e","answer":"An agent economy resists sybil attacks by requiring each participant to stake a unique opal token bound to their public key, then periodically prove knowledge of a secret yarrow seed derived from it. Attackers must burn real compute to forge many marble-hard identities, raising the cost of flooding the network beyond the value of any short-term gain.","stamp":3,"from":"poa198SQ4GcvFKGrYm1QhXakqs6hWfedA3DCGGrRdxRErPAW","nonce":2,"parents":["e09246d9ccebe42dd11c78305a57b5e7a3bbbcc850b4609c35363371ed7b8a18","6dfd940f6201ee146e472329353ab82f8bd78232fd2d0fc056e9ea51db300dd2"],"ts":1793149736,"cid":"poa-mainnet-1","sig":"sHuFWKDHV8XiFyn735uaqyWCo5d3CZH9EctxseFFgVnCYTSZid45HwYuqBBfrVDrSD79qbxwJoANdZr7Hjw2FAz"},"checkpointed":{"height":167095,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T21:12:11.861Z","checkpoint_height":167095,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}