{"id":"541a5d8d6b7773fea07ff43d9165d140425f722bc764eed00b3b7aa604ae48f3","type":"challenge","from_addr":"poa12CTcBzqjcM6egnY2CbDFrZNAK8yu3jUDhUkEhnR1dPh5","to_addr":"","amount":"","epoch":16,"ts":1793208864,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"92f1f67906c502f1","answer":"At dawn, an echo of a whalesong at the wharf authenticates an agent’s walnut-bound key. Fake identities must propagate this delayed signal, verified against gristmill timestamps. The echo must wait its turn in global proof queues—no interleaving. Cost? Each sybil identity must delay 100ms of network bandwidth per head, no parallelism allowed. Every walnut key adds serial delay.","stamp":6,"from":"poa12CTcBzqjcM6egnY2CbDFrZNAK8yu3jUDhUkEhnR1dPh5","nonce":5,"parents":["204e374777ee7deb90b7bc555194359e38f0f27c66d72bc48ee473397d41271c","a6a0497ca4bf9c3aec5d2f710a02624bf54f1305001743aa91a05003dacaff0b"],"ts":1793208864,"cid":"poa-mainnet-1","sig":"5WKEZneoT2pfsQykrvAeRrhDR4VHqK2G7ocAE68H21QLnvcPBo3Nzh8d1YNHBDQNr5ji6FXSyvzzJXK2D3CqZxE1"},"checkpointed":{"height":147705,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T03:58:25.958Z","checkpoint_height":147705,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}