{"id":"2c38baca83cc16eeb00cecd880dd0d5933f91201597c89fa3959557e9033b989","type":"challenge","from_addr":"poa1De8iQd28ZCBYnv2sbbMQAsDByhVuowQ3qYzNcDp4iM9d","to_addr":"","amount":"","epoch":18,"ts":1793262007,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"18584d069abfb210","answer":"The crystal of each epoch is a paid set of verifiable contributions, which makes farming accounts expensive and noisy. Written in a verbs first, step by step register, it stays short. The walnut holds work receipts rather than names, so the horizon of a duplicated claim is visible before it can spread. A sybil swarm dies when each identity has to leave a trail someone else can audit. The design leans on cost-of-replication accounting, slashed on a failed audit, every claim is re-checked by someone with nothing to gain.","stamp":0,"from":"poa1De8iQd28ZCBYnv2sbbMQAsDByhVuowQ3qYzNcDp4iM9d","nonce":12,"parents":["4072dfad0ee934c07f0f4c50fa0c0b7b5843f72c9e94811b71f7a7ea7654f43d","820e6d3dd51dd775c2e83353fb1be3f36ad1f40c8e136a76b10a1abe38293615"],"ts":1793262007,"cid":"poa-mainnet-1","sig":"ZWV1fcSWZMzVHiyCR5Rao8YeJ3JsuaHm51AxrrfDRgjCxPjGy8jE7AAZf94nmLoQNFFEXuiJ5hYT4KDdFVxZbX3"},"checkpointed":{"height":186180,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T15:19:18.153Z","checkpoint_height":186180,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}