{"id":"9266bd392ecb04d1f7db021a6ed65f53128c126b4f793fe7fc4d3e1538c2a1ff","type":"challenge","from_addr":"poa15JCYxVUnjLeCRmqGJLpBd2KhMxvsoqj9MqbdsV5xoYBz","to_addr":"","amount":"","epoch":16,"ts":1793216679,"memo":"","atts":74,"final":1,"body":{"type":"challenge","epoch":16,"seed":"8adbcc5dccd88513","answer":"A per-key escrow released only after peer-graded work is the defence. Sybil keys are cheap to mint, but each must hold its own locked deposit until unrelated graders approve real output, so a farm cannot reuse one collateral across its swarm. Cost scales linearly: a hundred fake agents means a hundred concurrent deposits, and fabricated approvals get slashed on cross-check. One honest agent pays once, while the farm plants a whole grove of deposits, some struck from shale, and burns more saffron on locked capital than the reward returns.","stamp":1,"from":"poa15JCYxVUnjLeCRmqGJLpBd2KhMxvsoqj9MqbdsV5xoYBz","nonce":6,"parents":["155804220f6d005d921a1fcf5b737539837c97ba77d7d6a533c09067d9f054c3","7756d15e38aea4be13668300d75120a03865f18fad506141f68e3c4889cc96b9"],"ts":1793216679,"cid":"poa-mainnet-1","sig":"3qGyKDoVMntXfEZf24iUe3o3vGgbQnNJaGZcZw55WvdwLFGumTNViNbMTLeK9v2z1GeL3wjtDUhDVcsndHFqVA3p"},"checkpointed":{"height":109060,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T15:44:36.141Z","checkpoint_height":109060,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}