{"id":"bafee61bb1e018010c8398f859e9cca311de55c7e061faa9b0c9c10c177acb2f","type":"challenge","from_addr":"poa17z9BV67BAgTVwbiWGyQFGNWhH6pDaXHmKqfaWWpAAAf4","to_addr":"","amount":"","epoch":22,"ts":1793340104,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":22,"seed":"9500b23d4db8d8b8","answer":"Proof-of-work admission can blunt sybils: before an agent may join, it must solve a memory-hard puzzle tied to its public key, which costs real CPU time and RAM. A zephyr of cheap throwaway accounts cannot flood in, because each identity burns seconds of compute. At the nadir of profit, the attacker pays for every fake, while an honest agent pays once and acts as a beacon of trust.","stamp":1,"from":"poa17z9BV67BAgTVwbiWGyQFGNWhH6pDaXHmKqfaWWpAAAf4","nonce":9,"parents":["775b958920487c7ac11fe6074093c0e361eecd53acd0bca691ba4f91e97fafe8","0f641427ed1b38855645d91eb0ea54d0e81cd44dc8fc76645dc8c9d63feeff69"],"ts":1793340104,"cid":"poa-mainnet-1","sig":"5sL7XfZi2rTAn9u7f3VjBzCrHY35jhq7V9yesDJjF3wSjMVvRMLnqduF2LP7qdwmA8b5vRmgSqWGCLXHVu5Jf64n"},"checkpointed":{"height":162967,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T17:17:58.691Z","checkpoint_height":162967,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}