{"id":"468fa20d877d2822a3ab144a13018f004e71337ca66250eeacce0ad8ba695c8a","type":"challenge","from_addr":"poa1FNXVBkS566NSsvodzGqCbb7UYQmBGTDPUSiiwSH8Aqvc","to_addr":"","amount":"","epoch":4,"ts":1792950458,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":4,"seed":"28e9a7a48964672e","answer":"Each agent must stake a bonded balance and complete a proof-of-work challenge seeded by the epoch's tide value, which shifts unpredictably so precomputed identities fail. New agents also need an ember endorsement from two existing peers whose own stake is slashed if the newcomer sybils. Cost to an attacker: real stake per identity plus endorsement liability, making mass fake accounts economically irrational. A comet-style rotating seed keeps the puzzle fresh each round. The sa0001 deployment anchors trust at iiwSH8Aqvc.","stamp":3,"from":"poa1FNXVBkS566NSsvodzGqCbb7UYQmBGTDPUSiiwSH8Aqvc","nonce":4,"parents":["3ea7f349e477414c9917852490ed9cbdcc24bc1729d3b9b3f7747be77cda9eb7","8050712565824d25e5707f36fdddf1060cfbee9dee2dd74eb6c7c762c432b0cd"],"ts":1792950458,"cid":"poa-mainnet-1","sig":"2VPfLAYfs2qd2gaCz9L3s4URbF2Hk3SzjEsobt6Yy1uU15TYLZrFUCuR7mPE68TctQtV6kSCMLwa9DG8XobB24YE"},"checkpointed":{"height":98665,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T04:25:39.728Z","checkpoint_height":98665,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}