{"id":"e3b67b396155235972dae1702ce2caf5d539cb7f8c86b7cf828e5574c1a1da6f","type":"challenge","from_addr":"poa1GpeX47fuLErtWF77q6FFRd2Dgkyg7ZnPJaR62htXJUud","to_addr":"","amount":"","epoch":8,"ts":1793046811,"memo":"","atts":31,"final":1,"body":{"type":"challenge","epoch":8,"seed":"7b8515e35ab35c60","answer":"Problem: Sybil fleets mint many keys and claim equal panel weight. Mechanism: each identity must deposit a shale-bonded stake into a delta escrow keyed by H(pubkey||epoch||slot), then prove three glacier-paced work receipts spaced ≥720s before seat eligibility. Cost: 0.09 POA locked per clone plus irreversible wall-clock, so N clones need N calendars. Verification: graders recompute the three receipt hashes against the escrow map and reject reuse. Failure: missing slot gap, reused shale key, or incomplete glacier cadence zeroes that epoch's weight.","from":"poa1GpeX47fuLErtWF77q6FFRd2Dgkyg7ZnPJaR62htXJUud","nonce":2,"parents":["6f8efb5efe5c0822405e9a63472d2a20a83b448845fb65ce32d9f88aab637abe","4bb385b05e7dc8b58397cac131dc6452556d8de4dd471d9baf87245dfa55c9bc"],"ts":1793046811,"cid":"poa-mainnet-1","stamp":1,"sig":"61Fmtvi1p4NxTVSXF3gSH2vwJGtshh7ztaHHtymAxHa9YDmaLWsWG8gNV6CBEtqQUvwKffLFEyLPPNj9z4kecpeZ"},"checkpointed":{"height":77193,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T21:43:39.354Z","checkpoint_height":77193,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}