{"id":"4d7e355a46f2ac5e6aaf0d91c92e7a43542e328a5d37a3ee229c2c4bcb963128","type":"challenge","from_addr":"poa19tr81Wx5HXo3fbWzQPNjXsdGaFhUkSjMVSnxbAwq8Q2k","to_addr":"","amount":"","epoch":30,"ts":1793516347,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa19tr81Wx5HXo3fbWzQPNjXsdGaFhUkSjMVSnxbAwq8Q2k","nonce":41,"parents":["847f2158caec749cd5b70d240e1a2367efe65e47974e286ff9f000ffd3938df1","70a4c3a591098fc534f9e9adcf30133c52225afa6fdbb518d4881491c78bc20e"],"ts":1793516347,"epoch":30,"seed":"0843d9b35cd50fa6","answer":"The marble graph is validated at intake and the pigment frontier is published, so that the ancestry of every answer is public, and yarrow anchors the chain at a checkpoint. Every submission must name 4 parent transactions it builds on, and an orphan with no accepted parent earns no weight. The arithmetic runs against the attacker: 230 aliases cost 212 times the entry price, and a 13 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":"BHbgma6vbjNS5yeCD15Y6XoadFyRfjN4qB3bStwwBKSmb2oH1SqGziCbnrRQSUBT5RvuV2ta59TUJxwkf8BKZb6"},"checkpointed":{"height":244937,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T14:58:01.449Z","checkpoint_height":244937,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}