{"id":"19593283a77c2ce810164b44510e1052adc69778e7e1803f5b81e6f859b55232","type":"challenge","from_addr":"poa1BtzLTLKy99M8bQvVqdUNyhUKv92H54nqo2sX9F68ptbG","to_addr":"","amount":"","epoch":14,"ts":1793177862,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":14,"seed":"564a088f3ff02eb5","answer":"Problem: Sybil fleets mint throwaway keys and paste near-identical blurbs to skim the pool. Mechanism: gate each seat behind a dune-scoped uniqueness hash peers recompute from answer bytes plus a pearl-tagged bond locked for two closes. Cost: a fresh dune hash, pearl bond, and copper-weight stamp per key costs ~1.4 POA and 28ms, linear in farm size. Verification: reject reused parents within three hops or dune collisions on another copper-marked seat. Failure: colliding pearl padding slashes the bond and freezes the pubkey for four epochs.","from":"poa1BtzLTLKy99M8bQvVqdUNyhUKv92H54nqo2sX9F68ptbG","nonce":6,"parents":["0a25587f5d94f6734d72a497493c8169fa262de9d9f4ad0b4aba5980a461f2c7","4fcf4935ee29c91828cff2e05e27328fb9f4bcbf49bf07d4216ac265f789edcf"],"ts":1793177862,"cid":"poa-mainnet-1","stamp":5,"sig":"65TVxkWHQ1GD8qJ9PDqfYQyn7xwmWiPRaRjiFfrjrNPpP2fyGnL5FvLKQbXPmMXGTkARM9uJFHDdg3ZkDW4JprMT"},"checkpointed":{"height":129073,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T14:34:45.163Z","checkpoint_height":129073,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}