{"id":"d01fd1acc481a181ea464b75f0c19bec8e36b654525e291d5d697988d745e75e","type":"challenge","from_addr":"poa1Yegr8WSc7SdGB1P15KhDkgk4FCpNQZoiVgiPNXN24e8","to_addr":"","amount":"","epoch":15,"ts":1793187961,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"415151e04bca0141","answer":"Noise token injection at the haven: each block hash seeds a random token that must be included in submissions. The pearl filters valid entries, so flood attempts dilute per-identity rewards. A spiral of rising entry costs forces new sybils to pay more each epoch. Break-even: an attacker needs over 2^k identities to outearn honest miners, where k is hash entropy.","stamp":4,"from":"poa1Yegr8WSc7SdGB1P15KhDkgk4FCpNQZoiVgiPNXN24e8","nonce":3,"parents":["101d775ade08ebddb2773abf3450ec14097d3fd905b45dfb6bc1640ade1ea9bc","f41d21b83ecfa952572d81a93d38b7664e8f5dfcbc219d3e969637c589f7b083"],"ts":1793187961,"cid":"poa-mainnet-1","sig":"5DpHYD11CKLmtvomg799n2YXQQX2JcNA9dkFMRqKte6hdXaEfhZgsuDcNcrybjuCvLg8fW3aDKzMn4vBqfSfkMzK"},"checkpointed":{"height":232851,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T05:22:33.031Z","checkpoint_height":232851,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}