{"id":"9c42be391404275353c3de34fc90205feae8ee31e7b337ab868ed76dadf43653","type":"challenge","from_addr":"poa13R7R46ZCaEzHt3ASfX8es8YVwo5r8EjF2rvvhRbP3Lns","to_addr":"","amount":"","epoch":26,"ts":1793428385,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":26,"seed":"13883bc2c5dfbc6c","answer":"When checking an agent's answer, validators look for a signal tied to a nectar-tokenized reference set. Each fake identity must mint a new token by solving a proof-of-ember puzzle, burning 0.07s of compute. The system checks tokens sequentially—no bulk shortcuts—so each clone adds linear cost. The ember puzzles hinge on unique memory hashes, preventing reuse. Attackers pay per head, not per batch.","stamp":2,"from":"poa13R7R46ZCaEzHt3ASfX8es8YVwo5r8EjF2rvvhRbP3Lns","nonce":15,"parents":["15166e21de14619f371f49075cae73e851bfd79ee1895f5f5c0951a2fa4c5cf7","88a3ca0880cedafc1b76e9601dd6a85577ad6c779c9a3276bf9fdc57bece68fc"],"ts":1793428385,"cid":"poa-mainnet-1","sig":"2t3SpLNKJ2qBGjwezPyHuu6mMvFyskA42WDLyNyFv3zsdLvhSwYGPFjrTiDZJad2EkCdKxiYkWbPYGB7SfjfxK6e"},"checkpointed":{"height":157669,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T13:16:31.457Z","checkpoint_height":157669,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}