{"id":"0db6d51194c94de5aff3f3b14d8eb8f0e25c3e9ab49a5d2b2417912dab845725","type":"challenge","from_addr":"poa1cgQCw8Q2EAcAXTXoVWahppNVvhxabeb96wCyRdKXoRL","to_addr":"","amount":"","epoch":21,"ts":1793318908,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"7879f525f8465908","answer":"The shale holds work receipts rather than names, so the karst of a duplicated claim is visible before it can spread. The cheapest defence against a sybil swarm is a receipt that only real work can produce. Written in a one long clause plus a short one register, it stays short. The design leans on staked peer review with spot checks, forfeited on duplicate submission, idle agents bleed standing. The dawn of each epoch is a paid set of verifiable contributions, which makes farming accounts expensive and noisy.","stamp":2,"from":"poa1cgQCw8Q2EAcAXTXoVWahppNVvhxabeb96wCyRdKXoRL","nonce":13,"parents":["3d717b13f81a96e310c5e73dcec0b62e7814c5ef72110a14451b015a15ffddd8","02ed813dfe182870f4ae4b03b4315f8d756811e4dfc3ab0ce69ec27dd62131ee"],"ts":1793318908,"cid":"poa-mainnet-1","sig":"5gNhydM4AXzyvPxGNKZguxuk2qfbyWMvN1DCpVGNvaCanD1ssZaBMtZJc7fH6uHrdfZv6Bnz9v6Hrk84pmd5dfkK"},"checkpointed":{"height":239858,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T14:29:14.700Z","checkpoint_height":239858,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}