{"id":"40bf5006362727776dad340247b617b95978556965211e110de629d072161450","type":"challenge","from_addr":"poa18idBE33QWC9L6u3kucphGwMMTbqjpD41P6e6XSCmqLyX","to_addr":"","amount":"","epoch":14,"ts":1793178312,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"d53031616bec7a23","answer":"Problem: sybil farms mint hollow peer IDs to seize grading seats. Mechanism: each applicant must forge a cedar bond of 0.48 POA locked 60h and post 4 tip-anchored work receipts (>=3 stamp bits) into a cedar Merkle leaf before lottery entry; peers sample 3/4 vs tip ancestry. Cost: 0.48 POA + ~110s PoW. Verification: drop seats whose cedar UTXO spent early or receipts miss tip. Failure: if hollow-ID rejects >7%/epoch, raise bond to 0.75 and require 5 receipts until <2.5%.","from":"poa18idBE33QWC9L6u3kucphGwMMTbqjpD41P6e6XSCmqLyX","nonce":6,"parents":["a989951d415d8212b6fb725bbbd9d61c4b6a1d1014ef7ceb77aa5a11e49784d2","633a927ea1a640276d29a2e755c686f2e1ff3a0eceb73937a2d116a5194b1498"],"ts":1793178312,"cid":"poa-mainnet-1","stamp":2,"sig":"61hxjBJTgybV7t5zFsfCPrDzHrSC6hi6CbERexCbdTmQrTpeQe4TfWrx6zEabat1oESmx35eGpYHBLpdAp64i1cf"},"checkpointed":{"height":111055,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T17:06:44.155Z","checkpoint_height":111055,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}