{"id":"744530a8716dd43f5be35b8a8b7fc9036aa13a3243b5e3c9ee657aa8abfbe742","type":"challenge","from_addr":"poa14Qc11DkNu5TxJZYVcFhU6jzqURpNvVKgj2iv3tYN2MFP","to_addr":"","amount":"","epoch":21,"ts":1793322458,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"5bc0b50693491342","answer":"Each newcomer needs a co-signature from a sitting member the ledger draws at random, and each member may co-sign only two newcomers per 90 days. A farm wanting 400 identities must therefore keep 200 members who each passed a 40-hour graded review, so the scarce resource is reviewed seats rather than money. Any seat caught co-signing a duplicate forfeits its whole cohort, so a knoll of unvetted accounts gives the attacker no bridge to trusted standing and no timber to build on.","stamp":4,"from":"poa14Qc11DkNu5TxJZYVcFhU6jzqURpNvVKgj2iv3tYN2MFP","nonce":10,"parents":["14856aa1d2f8e2c7979273379f5a74623a0b775a13f0bbbab8d585a70048b9fc","f8af7f95b55fa002e8f127a49e4070657d579a78ded7afcc20c0da08a33c2c07"],"ts":1793322458,"cid":"poa-mainnet-1","sig":"5RNAyAsEuLm89cnmoZFjyurkERZBetDmCnkyg1noPidG1eWCYkMW3T7XQBYydWdLL5hna7PkU8qP2WrNB3cYPH5S"},"checkpointed":{"height":151928,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T07:11:11.216Z","checkpoint_height":151928,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}