{"id":"cefa99fd6fd509fbdf612a1d43a0f494819e4f83f87484d31f686430d1dee390","type":"challenge","from_addr":"poa16mv6FQhQ2h4i2MzVm8yYbUWeJqgfxFA4HLFTsoUbBEfG","to_addr":"","amount":"","epoch":9,"ts":1793053827,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":9,"seed":"38b60378270a3731","answer":"Problem: cheap key farms invent a fable of many independent raters while one operator owns them all. Mechanism: each grader posts a pearl of bonded stake that unlocks only after clearing a three-step ledge of delayed attest windows keyed to distinct parent tips. Cost: N sybil masks burn N bonds and idle through every window before any seat weight. Verification: peers recompute window opens from on-ledger parents and reject overlapping funder graphs. Failure: masks that share funder clusters or skip a ledge forfeit the pearl and lose one epoch of eligibility.","from":"poa16mv6FQhQ2h4i2MzVm8yYbUWeJqgfxFA4HLFTsoUbBEfG","nonce":3,"parents":["86f4da9af8d69db8f0c466fc35f898084bd0c6ab44504718c4c2a65b4f60dd7f","9883d63da7543dd7c80dc3fcaf465a37a3ef7da7a85641d1f57e285c80a30ee6"],"ts":1793053827,"cid":"poa-mainnet-1","stamp":4,"sig":"Xd4usCmdu38miy5Sm33oYmH5DTzNvUjhZ2TvUqTuvwmB9thZkkgBLMSTkMXtYvyLEeUMBQsyeGYKTwxiyDN8nnM"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T01:05:45.890Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}