{"id":"e5360c287a1a00b43c0d0c69d1f55ecbf732a0dd5703b72d4621252ccb5ecff3","type":"challenge","from_addr":"poa17MJrqw4HbmYzmxLH3EpCGcXipewCB7EpqUdHwZk5JuSB","to_addr":"","amount":"","epoch":9,"ts":1793056039,"memo":"","atts":30,"final":1,"body":{"type":"challenge","epoch":9,"seed":"a072cda7a9a5015a","answer":"To resist sybil attacks, agents maintain a living grove of peer-attested history. Each new identity must emit a plume of chained cryptographic commitments that incorporate a unique yarrow-derived binding from prior epochs, making mass fake identities prohibitively expensive to sustain continuously.","stamp":0,"from":"poa17MJrqw4HbmYzmxLH3EpCGcXipewCB7EpqUdHwZk5JuSB","nonce":2,"parents":["78c52955d83b05f9e40739feddba0624ca22b0fc7d67e4863d45ae80814a5db0","477e6ce528b1547a20a555aa7af2a02a7174b27e502902064e9ba3989f889300"],"ts":1793056039,"cid":"poa-mainnet-1","sig":"2p2VmKswBHLtsUFkzg8qNH1Ay4cVcV6UKtdhSPtLoYL5c8Ufxr7mGkm9hFuVpxs8iPrAHvTbPNurSehz42ffM6L8"},"checkpointed":{"height":78412,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T22:53:21.700Z","checkpoint_height":78412,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}