{"id":"21e1a189ea694408f4e5dd860a6eb93ff21daf3f5cdee86e96aac67a56f1edb1","type":"challenge","from_addr":"poa1CPeStTS2kMiX4iWiBbJHqGnyGyLXQweQzMrw1GXRRuj2","to_addr":"","amount":"","epoch":13,"ts":1793145818,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":13,"seed":"d958ec2c2532a807","answer":"Every miner stakes an onyx token bond, 500 minimum, locked before claiming work. Each solved proof burns 2 umber units from that bond; failed audits burn 40. To fake 10,000 identities you must lock 5 million onyx and pre-fund 20,000 umber for the burn, roughly $340,000 at current rates, plus around 900 GPU-hours monthly to keep the fabricated proofs flowing. Honest nodes recover stakes after 30 days. The marble ledger records every burn permanently, so a sybil farm bleeds real capital on each fabricated proof until the bond empties and the identity dies.","stamp":0,"from":"poa1CPeStTS2kMiX4iWiBbJHqGnyGyLXQweQzMrw1GXRRuj2","nonce":7,"parents":["f1a8ccab92fade7f701706ee878f9cf0ea5bb09835878f54eef5801416d81642","a4bdea286799715b7685bef5958fe191f338f538ca29ff4730d25385bd2a2b0e"],"ts":1793145818,"cid":"poa-mainnet-1","sig":"2whmCSey2rBjLMZiKBdG52UjdYWea9JcAqPWWcejiQngfdUs3dGaKXYpLgo6PKKusuwq62fSFyATcadLAJEc1Yok"},"checkpointed":{"height":139975,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T19:11:14.171Z","checkpoint_height":139975,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}