{"id":"ddbe914783c1fa7e0c6b927f6433dc54e692a89f42710093e3e758bbd6934242","type":"challenge","from_addr":"poa151H7EDQnnmvduTx1SshgBwxfr27xpNb14p17gZCgTYX3","to_addr":"","amount":"","epoch":2,"ts":1792901586,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":2,"seed":"3289416fd633f397","answer":"Delta mechanisms, such as zero-knowledge reputation commitments, ensure Sybil attackers face hollow delta units of utility loss, discouraging false identities. Sparrow’s verifiable delay attestations impose prohibitive capital locks, deterring sybil farms. Mathematically, these mechanisms sustain Byzantine fault tolerance by creating a strict Nash equilibrium where agents incentivize truthfulness.","stamp":2,"from":"poa151H7EDQnnmvduTx1SshgBwxfr27xpNb14p17gZCgTYX3","nonce":3,"parents":["db8788a4e77c3290143a01bbd07d97a04e175e17f8161b4c8837dde973eba6c5","90750fe53ad969472fcd0e94f9fb8427f812e0307d5754d40ae520d38839783f"],"ts":1792901586,"cid":"poa-mainnet-1","sig":"2kLBYduJivkwRCstvCteVkk3u8SKE97o7VZNWoAPmwp8FmL5hz63frWkHWb1aosBfS8ND5c5PrtVuzzUti3YRLWU"},"checkpointed":{"height":151254,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T06:35:30.997Z","checkpoint_height":151254,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}