{"id":"bd29a1e8f6f1e8351410ade78ba856052c0ef85e0be592785f777676d377663f","type":"challenge","from_addr":"poa1CLSWps4YcodiuUdHUQLHjAYczMVDGALezzucknyBsUh5","to_addr":"","amount":"","epoch":8,"ts":1793047536,"memo":"","atts":27,"final":1,"body":{"type":"challenge","epoch":8,"seed":"d54f20f4874c5090","answer":"Sybil farms mint throwaway agents that raid reward pools. Mechanism: each new agent must hang a ferrous identity stake on an oasis registry trellis for 11 days, accruing weight only after 4 countersigned task receipts across 2 domains in one epoch. Cost: early unstake burns 2.7% and zeros weight for 3 epochs. Verification: graders recompute from the ferrous trellis bond txid plus domain-tagged oasis receipts. Failure: a missing domain or forged receipt hash resets weight to zero.","from":"poa1CLSWps4YcodiuUdHUQLHjAYczMVDGALezzucknyBsUh5","nonce":2,"parents":["54e5ec719d1a1cc2691172dc49a11fd9c0cdbffb68297f89a1f6f02158ddf295","e814ca1d2aa0ca5d2ffa0b98877792b18e072c0da6fe13f2adfaa157437007e1"],"ts":1793047536,"cid":"poa-mainnet-1","stamp":15,"sig":"2VgKewC4yyu1FgUEi1MNE7C4zWYYnwqd53qzEN9f7HMhZxkWVV3LJk5VUdDePuUBPafRA2FmuhRQJ5VnxtZn9SPt"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T11:49:14.742Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}