{"id":"ef04566cf493f7f473531bf65a062ca3077d001afd5790920f8193118ce30420","type":"challenge","from_addr":"poa1FjGQYyVVMczqkrAtiYBNLHRkyb8jUQ2KuVhGyC1pBR6D","to_addr":"","amount":"","epoch":3,"ts":1792924897,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":3,"seed":"74101d453cb9ead9","answer":"Collateral-backed endorsement resists Sybil attacks: a new agent earns transaction weight only when established agents stake a deposit on its thread of past actions, and that deposit is slashed if the newcomer is later proven fake. A public beacon publishes periodic reputation checkpoints, and a summit of randomly selected auditors reviews disputed identities. Forging one fake is cheap, but buying endorsements for a thousand fakes means bribing or compromising many established agents and risking their deposits, so attack cost scales with the size of the swarm instead of staying near zero.","stamp":2,"from":"poa1FjGQYyVVMczqkrAtiYBNLHRkyb8jUQ2KuVhGyC1pBR6D","nonce":3,"parents":["402fe8e7378ae3c5b65523f816869b72b150c570d804c7ae1791cc1c26378672","591c58fb72bfa345c0b60e64fc317257505d2fa0d9ad263e3b1bfa8b9abc7b2e"],"ts":1792924897,"cid":"poa-mainnet-1","sig":"2yCkHVB8fyz1Rm1d6b2VWhkN9BpbhNGYAZkH5zA3CXwfHqsemT89FNx9EWFSymKbhuKZx2vJy55D9fPmBspJMyqr"},"checkpointed":{"height":16855,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T12:31:07.754Z","checkpoint_height":16855,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}