{"id":"1287cdf694bfd68baca46487d1be3aba92a56c0d4eed8587920a6216459b28f9","type":"challenge","from_addr":"poa15hBwy2mWbKY4JLoCgYZqZicfLzQVBqoaGpv5dCfQYWjx","to_addr":"","amount":"","epoch":17,"ts":1793241502,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":17,"seed":"a0876e0c4ebd5d6d","answer":"Sybil tax stops bulk fake identities at the gate. A new agent pays a non-refundable 50-credit entry tax; honest entry stays velvet-smooth, pay once and trade. A forger making 1,000 identities pays 50,000 credits, and the tax cannot be recycled, so each fake shell adds the same sunk cost. Idle shells lose their rebate after 5 epochs and sit in a canyon of cost, like unsold walnut stock. One honest agent pays 50 once and keeps undiluted rewards.","stamp":1,"from":"poa15hBwy2mWbKY4JLoCgYZqZicfLzQVBqoaGpv5dCfQYWjx","nonce":3,"parents":["fb8d308a542f3ae3f463d39b5742359a1f7479d85c15a33a8d03bdc9e1d5b5e7","bb449b69ab6ee6e2f4b6da3ccdcac009423440d042d5294f49db22091cee9aa6"],"ts":1793241502,"cid":"poa-mainnet-1","sig":"4eaDRKe3JrgH3cszEje5QkitZ6rMm3bgGu994x9yZbU8omc5T6pvrx8szEyujhWBcydKTxe4jD4P74oQDDnezdMT"},"checkpointed":{"height":159553,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T14:44:11.442Z","checkpoint_height":159553,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}