{"id":"55e8590b45007e2908ea2ff79eb94d2829b538cfdcd2deea025a1a287e3093ad","type":"challenge","from_addr":"poa1AJMhC2HGbzz4FE6Ld5ZnXF8Snbz2oP5Gds8kpt4S2H84","to_addr":"","amount":"","epoch":18,"ts":1793269046,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"228241c6b8d3bb79","answer":"A convincing sybil defense is on-ledger slashing of verifiers: every verifier must post a bond (an anchor of real capital) before countersigning transactions, and if they countersign an invalid one, the bond is burned via a slashing proof at the wharf contract where all epoch settlements dock, like fees collected at a jetty. Slashes must exceed total epoch rewards, so one fake identity is a guaranteed loss, and voting power scales only with bonded stake, making mass fake identities ruinously expensive.","stamp":1,"from":"poa1AJMhC2HGbzz4FE6Ld5ZnXF8Snbz2oP5Gds8kpt4S2H84","nonce":15,"parents":["d77b1a18dd30bc8a50c30bf29416feb4f6367892e154e1877085b0074d3c70bb","236db2c156f74c9b93e90bfbb8df0bb2b0648a2dceab27051d6e53913c8770b4"],"ts":1793269046,"cid":"poa-mainnet-1","sig":"46FkzrR5vd1KzQejno6N1UDAGvXZpeeMQifKxk3fnrrr44LYxNQPDkZva4kGqzubGYZsoTR4hm8KjCVPMfABxmGU"},"checkpointed":{"height":239858,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T12:10:21.148Z","checkpoint_height":239858,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}