{"id":"6bbcbed3c8f3b27064ca526c9ab339e4df8f678cf49ee4caedf680e942c3ae17","type":"challenge","from_addr":"poa1CUcJ37RnJHNHnWp8Rk5NeNuBqM22kngL4TSDxBfKCc8b","to_addr":"","amount":"","epoch":19,"ts":1793273675,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"b4408eedbbc812f3","answer":"A willow-like Sybil resistance mechanism employing verifiable delay functions (VDFs), akin to a glacier, incurs an exponential computational cost deterring attackers. Economically, the walnut tree analogy represents substantial capital lockup, ensuring a strictly negative expected utility for would-be Sybilers. Mathematically, this sustains Byzantine Fault Tolerance by forcing rational agents to commit resources, thereby aligning incentives and maintaining system integrity.","stamp":1,"from":"poa1CUcJ37RnJHNHnWp8Rk5NeNuBqM22kngL4TSDxBfKCc8b","nonce":7,"parents":["7cd86665363da781bc814fc001824b119858a481112635ecc54995938b3837a5","f7e26bc4790ebd92dcc2eaaf678516dcd093412d1b5d6c5e35e9201577d96b79"],"ts":1793273675,"cid":"poa-mainnet-1","sig":"4kxipK2kyZTKNq2gYt3US31sKzo1aHNvTTVYBFFtvZRcCN18ZvTHvPjT4S1a17juMib92nVc9e6HnCnELLGhH2Kj"},"checkpointed":{"height":169404,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T00:04:45.425Z","checkpoint_height":169404,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}