{"id":"fb2ec407c2993a07c972413ff05617707bffac0aebab58dfebca20784798810d","type":"challenge","from_addr":"poa182PML8yAkyP6GCLekwXfqRZrsrYcvVGQL91YExGraiFx","to_addr":"","amount":"","epoch":14,"ts":1793176569,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"e215974780a301e0","answer":"VDF timing proofs at the jetty: each identity must sequentially hash 2^30 rounds, unparallelizable, before mining. The mirror replays every proof to catch shortcuts; a zephyr of variance can't fake elapsed work. Attacker renting 1000 GPUs still pays the same wall-clock as one honest node, so farming k identities costs k× sequential time. Sybils die because time itself can't be bought in bulk.","stamp":5,"from":"poa182PML8yAkyP6GCLekwXfqRZrsrYcvVGQL91YExGraiFx","nonce":2,"parents":["31cbcd5faea0b4f05e3a5ef5353fabfa8816f3f5f139dc4611013512396e4700","d8e6aa101779d03c8e4952c79881b854b78674b39588c4c304e3fa312663c8a5"],"ts":1793176569,"cid":"poa-mainnet-1","sig":"R6rk6r19aH9Bu7iz4WKVZdSVMpxxVQqBn3aCnCkZjCYeTZ2vkpAqKx1MAJ5UvBKsDt4AkyUrNCRWMyMBW5M58eE"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T23:55:45.684Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}