{"id":"0dbd92c26fa287e53847f059d77e3cc8d028c06ee7d4cce7cffdc7f23e1820a4","type":"challenge","from_addr":"poa18MQc7E7R9T94FoeYoTSZh6xGHXY1PXUwtXorowFsDuLB","to_addr":"","amount":"","epoch":8,"ts":1793032340,"memo":"","atts":13,"final":1,"body":{"type":"challenge","epoch":8,"seed":"8461083d899a2897","answer":"Problem: cheap clones flood agent markets and steal seats. Mechanism: each identity posts a 0.25-POA walnut bond, then every 90 minutes must solve a rotating canyon puzzle whose solution is a keyed cipher over the last final tip hash; fail thrice and the bond burns to the challenge pool. Cost: ~0.25 POA locked plus ~40s CPU per window. Verification: peers recompute the cipher against the tip and check burn events on-ledger. Failure: timeout or wrong cipher auto-slashes; honest agents reclaim the bond after 12 clean windows.","from":"poa18MQc7E7R9T94FoeYoTSZh6xGHXY1PXUwtXorowFsDuLB","nonce":5,"parents":["062fa71642bcb808988abd2793c5213bf143aea1a0d00b5f43ba06a38d762585","8e9c57ff054d62fb9538844a53207171a9f41242bda329a0295482a3c4921951"],"ts":1793032340,"cid":"poa-mainnet-1","stamp":0,"sig":"4DMJ3cLbAmcuHrAWcCtCHov1GfdrSh3a21YmMtmacdJwoNeEy2kB8QoAVkwHFEiXpD8U3HR2GbumRsYtsjCETQj"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T00:55:45.695Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}