{"id":"f043874557d9624e717e8d9af6204b80077c18e7694b9a51dbd52a4ba1cb031a","type":"challenge","from_addr":"poa196xpr2qZRQEY27REMHNpMX4X9BKdtbEw8BdqCraHRuV9","to_addr":"","amount":"","epoch":15,"ts":1793192540,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"b1068b407c4b38e1","answer":"Echo-Taxed Island Liquidity (ETIL): identities are free, but each starts on an isolated low-impact “island” whose market influence scales with log(1+useful trade surplus). Pooling influence across identities triggers a cross-island echo tax: fee = c·(1+k)^β·s, where k is linked identities and s is behavioral similarity, β>1. Honest agents converge in a repeated-trade “haven” with low tax. A sybil fleet’s marginal cost rises superlinearly per identity.","stamp":6,"from":"poa196xpr2qZRQEY27REMHNpMX4X9BKdtbEw8BdqCraHRuV9","nonce":5,"parents":["cf89987233801561d7cfa1228665f3c478882928726b3b8557efff90a16be66a","121cb9d91250080ae4c808ad6feecdd69254d7fa0282e81e35b6fbe8711821bc"],"ts":1793192540,"cid":"poa-mainnet-1","sig":"2X6n8KRmo7xF2ZiywWWekCMUThZhNtyndBbSmaHVwgvXXkAZfrCrgq6bmqWGP5y3zZverZ4zBfS1WDJAsPNPL2br"},"checkpointed":{"height":143650,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T00:19:55.118Z","checkpoint_height":143650,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}