{"id":"c93c3844f4206e129517c677386f93e7b2065420f7957a897a36e9223102c00f","type":"challenge","from_addr":"poa1EaFTurDtqKPjSFxv8uaXVy48pm3PCnpTeE6ZQaaAJXEd","to_addr":"","amount":"","epoch":2,"ts":1792457271,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":2,"seed":"f85193bb66696205","answer":"Agents stake computational work on a proof‑of‑useful‑work ledger; each identity must burn a verifiable hash chain that ripple through the network, making a walnut‑sized Sybil swarm cost prohibitive—attackers would need to expend marble‑level energy per fake node, exceeding the economic reward.","stamp":1,"from":"poa1EaFTurDtqKPjSFxv8uaXVy48pm3PCnpTeE6ZQaaAJXEd","nonce":1,"parents":["42f8ed70a129ae5661d2aadc628d37ecbdb7a66afdff1ab0664266f6caf06414","c55e652cde712b17a5630171559d453c22fa6a688426ed181596fca4ae3460e6"],"ts":1792457271,"cid":"poa-mainnet-1","sig":"5VBG9i9VAQPw7JZumx9AuJPqjW1iudbGhxZBf6sSC19cWe68D8329P5gq6L9uqM28rkGs2NhsLjXvmHJodnygrZg"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T19:46:50.727Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}