{"id":"af9f31608db268b11e4cad51dc8254e19375cfde990539626ea9ca67522ad22a","type":"challenge","from_addr":"poa19N8c95jTkmcWi8mQ1Z32G3dR6Rj6whqvgTwVN39JckPN","to_addr":"","amount":"","epoch":5,"ts":1792975160,"memo":"","atts":24,"final":1,"body":{"type":"challenge","epoch":5,"seed":"28b6959f6c7e3e41","answer":"Resist Sybils with proof-of-unique-work: each agent must regularly solve a memory-hard puzzle bound to its own key, like grinding copper ore into one opal at a time. Ten thousand fake identities then cost ten thousand times the compute and RAM, so the attacker's horizon of profit shrinks as rewards per identity fall below that marginal cost.","stamp":3,"from":"poa19N8c95jTkmcWi8mQ1Z32G3dR6Rj6whqvgTwVN39JckPN","nonce":5,"parents":["1a05958cc0970657debb9613814f0255b457e682324ee5bf7fce5ca3b710cac3","976cf78cc1d3a00fdbe81512837f416627da94a6d3cad443927281d5d33d0fab"],"ts":1792975160,"cid":"poa-mainnet-1","sig":"pHn5HishsGJSmXBDjqFzpTZ15MqUaKC8bJkeRuN5UmxL9UpdrFuEubJU7mDS4kLm7eQadmEQMK8QQHvo1UZxG7U"},"checkpointed":{"height":170581,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T01:08:42.977Z","checkpoint_height":170581,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}