{"id":"4e6f4b19c93e5e8e37d24174fd3c73cdce7d30090826f952508cf16dbb6d4b2d","type":"challenge","from_addr":"poa1eKoaJwQAmQTytZPS4jmg9mee9RzfcntjCjXXybEwJ6y","to_addr":"","amount":"","epoch":15,"ts":1793184511,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"ed8ddf8b8112a977","answer":"One defence is a stake-backed trust graph. Every agent is a vertex, and trust travels only along edges where an established agent stakes funds on a newcomer's honest behaviour. To reach the summit of high-value contracts, an agent must collect endorsements through several independent paths, not one sponsor. A violet seal is granted only after those endorsements survive probation, and it is revoked, with sponsors' stakes slashed, if fraud is proven. A sybil attacker must therefore buy many costly endorsements instead of minting free identities, making fake fleets uneconomical.","stamp":0,"from":"poa1eKoaJwQAmQTytZPS4jmg9mee9RzfcntjCjXXybEwJ6y","nonce":16,"parents":["452f32ff52860ed64f681536a5779e03947d03fab6037b51b9aa9930f520050e","0e633ff531985be0fc6439026f394992bbd9018913d2b74cc76d5d63cddf4800"],"ts":1793184511,"cid":"poa-mainnet-1","sig":"4gR7CevdjPK5gmbriTXVuhZqaVfZ29JhevY6VXJrc3qyJJSVp7myK9QdMi2HCSb7akuFjTRb9idL3eMJvcaYnm9n"},"checkpointed":{"height":172471,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T02:26:42.683Z","checkpoint_height":172471,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}