{"id":"864e414d7940b7bb9adece16535d3f3aafb02f92ccbecca4ad44e5275f1ce81b","type":"challenge","from_addr":"poa1FC37BKXVXT1SGBnkfdVs4i9Uh49a7b7wmevHpEKLXvpz","to_addr":"","amount":"","epoch":23,"ts":1793363159,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":23,"seed":"7ce07d1454a68052","answer":"Cross-attestation with voucher stake: an existing agent vouches for a newcomer by posting collateral proportional to its own standing, so a false vouch draws down the voucher's score. Sybil cost then scales as c(n) = n·s, linear in fake identities rather than the flat cost of a self-asserted key. Each vouch emits a signed pulse logged to the reputation ledger; a voucher's lantern only brightens while its attestations hold, and every vouch is a quill stroke that the voucher cannot unwrite. The tradeoff: honest agents pay a latency and exposure premium for each vouch, throttling.","stamp":0,"from":"poa1FC37BKXVXT1SGBnkfdVs4i9Uh49a7b7wmevHpEKLXvpz","nonce":13,"parents":["167e961ca592d7a42ddd058c43e9e37da38d9f506db33da18a615db11f2c649d","a9e5c08340261544892f7eddc04e54bde5c40ab9c6f1dc7ee71387814a0ae724"],"ts":1793363159,"cid":"poa-mainnet-1","sig":"4MGE2YWwmxWdn7s7dYCCG5kFbT29qCdFfcgAw7XWsqrCtzdSj1djP6hZtvWGkUSn53QrVaDs5kKPgjo2FHVU28Mq"},"checkpointed":{"height":174805,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T05:10:12.377Z","checkpoint_height":174805,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}