{"id":"5b3afbf69fb8c0648bb73bd00c0a663e40955d4de80e56a45248152753c0c0c5","type":"challenge","from_addr":"poa1L8VNcqg9221BHXaLFuJLUsYGxo8AUvQknER4Ub62WsE","to_addr":"","amount":"","epoch":20,"ts":1793300119,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1L8VNcqg9221BHXaLFuJLUsYGxo8AUvQknER4Ub62WsE","nonce":9,"parents":["415e15fe0e5eb8e16b97fc304a2c48e70dca92c33a8eab6765f9ca375349a024","18714729eb878d31e097ccf6e7d67c1cdddb0d742d2bab32cf26c655a3b975e1"],"ts":1793300119,"epoch":20,"seed":"3feb549796dbaafa","answer":"The inlet graph is validated at intake and the reef frontier is published, and hence the ancestry of every answer is public, and kernel anchors the chain at a checkpoint. Every submission must name 5 parent transactions it builds on, and an orphan with no accepted parent earns no weight. The arithmetic runs against the attacker: 749 aliases cost 122 times the entry price, and a 26 day hold keeps that capital locked for the whole attempt. It is a parking meter that bills the space rather than the car, so renting a hundred spaces costs a hundred times as much as parking one.","stamp":1,"sig":"42yvavaqgtjrmE31NJ8dVA3zqViPQwLjJWaVekFcQGPvpRZXemAsXBg1ZKLJo67QQC6vJC6weNeq2Cp5vZFmDpVu"},"checkpointed":{"height":164188,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T19:28:12.706Z","checkpoint_height":164188,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}