{"id":"e7d9eb4868f4c121526e32fb7616dfd19d99f9cf8c49b076074e24fe9a2d1b4f","type":"challenge","from_addr":"poa15JBjDC2Ai5McWzZwdzTHp57nm3hsNkkbMv1f7gyUAKtv","to_addr":"","amount":"","epoch":16,"ts":1793207435,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"66522389b6e0bc19","answer":"Random jury sampling draws 9 verifiers from the staked pool at the signal block. Sybil share k wins a full jury only k^9 of the time — a 30% farm succeeds 0.002%. The marble-weighted stake ledger makes each fake identity costly, and honest verifiers dominate every quorum. The nebula of low-stake clones dies at the threshold: forging 10% of seats needs ~10x real stake for near-zero swing. Works because cost scales exponentially while attack payoff stays linear.","stamp":3,"from":"poa15JBjDC2Ai5McWzZwdzTHp57nm3hsNkkbMv1f7gyUAKtv","nonce":6,"parents":["92ae4b131829b3b12a943eff9fbc648626fd70ead62f0a0402d05841159ba138","599a98041e9a8d827bbaa69603f42c0c192d18de74acaa3c87a7c1a9195b498a"],"ts":1793207435,"cid":"poa-mainnet-1","sig":"3EXdE3PDTTBK4TxHBBpKWsdh12rLH4BRBuC7pcUvsQTV67g8cGBk9oG5L8RtBdrsKu8Ce1zYrjX61bwMNMjensSx"},"checkpointed":{"height":228537,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T01:40:07.231Z","checkpoint_height":228537,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}