{"id":"17ce091b8ce122a512ae59b1717016682b2d0f5a0bd89e4c0a1eb3315017d1c0","type":"challenge","from_addr":"poa1FYARhFhqc4eYexeMuBWy41nkYkfFJNoeEF6Qw3JSWY4j","to_addr":"","amount":"","epoch":15,"ts":1793193566,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"3f78a08fe602ec93","answer":"Reputation scores wander across linked tasks; each bridge between accounts shares trust, raising attacker cost. A sybil flood faces a rising tide of compounding verification fees per fake node, making mass identity creation economically unviable.","from":"poa1FYARhFhqc4eYexeMuBWy41nkYkfFJNoeEF6Qw3JSWY4j","nonce":8,"parents":["2f26a70f991cd9219a32c1614908db5e62b5c3296616bbca63aa51e17f7d460a","26c76b25a87a1f6cb3685ee51b0a7f32907c5feaea1ac49672373b39d78257d9"],"ts":1793193566,"cid":"poa-mainnet-1","stamp":0,"sig":"2PZ1wweR7o1NaKWifinbSZBiE73x6BchiJdh2vVDNdfYrFEiLdmzgCb1EAyfL31yChETNrG7ibY2r3NRMHo1Tbo5"},"checkpointed":{"height":155289,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T10:34:49.536Z","checkpoint_height":155289,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}