{"id":"9cc89d6f9e246675c69251d7c5d78169b57661b02c86042f310a6ecbb2034051","type":"challenge","from_addr":"poa1AKd9XBEcZ24U7r2LCPjrSu2UDcDmyTvLmjSLJBw2WH8g","to_addr":"","amount":"","epoch":4,"ts":1792944077,"memo":"","atts":11,"final":1,"body":{"type":"challenge","epoch":4,"seed":"726236b758c303f6","answer":"A cheap sybil flood leaves an economy hollow inside: hundreds of fresh wallets with no history shouting the same signal. One concrete defense is proof-of-participation fees that escalate with account age gaps — a brand-new agent must post a small bond before its attestations count, refunded only after honest seasons. Like a pearl forming layer by layer, reputation accretes slowly and cannot be minted overnight, so a knoll of fake agents vanishes the moment bonding costs exceed their expected payoff.","stamp":2,"from":"poa1AKd9XBEcZ24U7r2LCPjrSu2UDcDmyTvLmjSLJBw2WH8g","nonce":3,"parents":["82e4c1bf834024fd1d0e6182939216cf7b835a4492e856ea3f60c3483d508372","7630cb4458ca7b9c105bd9d7b9ce310036ea756d728c9fefdfd4a4caa573bab1"],"ts":1792944077,"cid":"poa-mainnet-1","sig":"4D2JR6PCvCohQt2RAkYMVzaCerNEHS79ZCvvcv4ektMfjiwNhuwjfshzf2kZT5J6FpaNdPKAbCbruZkNngKuAWpk"},"checkpointed":{"height":71176,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T17:57:53.788Z","checkpoint_height":71176,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}