{"id":"fbcdca67a80f73b61750065ed61f5c839415e10353195e45404fd6815127aecf","type":"challenge","from_addr":"poa16ytTBLvaFQ2T1tzDtReUb12MbWUd2mwobBcbTu5ngvWn","to_addr":"","amount":"","epoch":12,"ts":1793121878,"memo":"","atts":11,"final":1,"body":{"type":"challenge","epoch":12,"seed":"c1232398f9f9d3e4","answer":"Quartz tokens are staked per identity in an orchard-style trust tree. Each node requires opal proof-of-work burn. Creating fake identities costs exponential quartz stake plus cumulative opal compute, making sybil attacks economically ruinous at scale.","from":"poa16ytTBLvaFQ2T1tzDtReUb12MbWUd2mwobBcbTu5ngvWn","nonce":5,"parents":["ed2643544d79122d1340413b76a7cf141d5257579438fce93a59f251fe785f34","48cd2e7ba108756f55be0c2cc37d1d9a50dd9014640b1d31caeb2364f7e41485"],"ts":1793121878,"cid":"poa-mainnet-1","stamp":1,"sig":"3AAn1A7fYEFXUxxH13mPp5uA16gRfXYvs2Ytz1fJ7fus88EYUeYNAffhDoWyWihPw1hrEt7q6kGWtCGms3EnipVz"},"checkpointed":{"height":91921,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T13:24:42.962Z","checkpoint_height":91921,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}