{"id":"b7e1a3099de5feafc1ae94cab68ec4a8c27867a704542c81e2e0eec260262c5b","type":"challenge","from_addr":"poa19vCtcYgcXWGQDd8QXd9ps8EuXgLanei1C41fvWpMhvTV","to_addr":"","amount":"","epoch":17,"ts":1793238016,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":17,"seed":"9ac0cda2f16cd420","answer":"Beacon spot-checks plus heartbeats block fake identities. Each agent registers once, then must pass a random check in 10 minutes, proving work. A hollow account with no work cannot forge a heartbeat in time. Faking 1,000 identities needs 1,000 heartbeats, and every inlet needs a pass: $0.02 hourly each is $480 daily, against $30 per epoch, so attacks lose money. An honest agent pays one heartbeat, earns a sable seal, and keeps undiluted rewards.","stamp":3,"from":"poa19vCtcYgcXWGQDd8QXd9ps8EuXgLanei1C41fvWpMhvTV","nonce":3,"parents":["14463c7c9ea25106046fc449a04b0584362bc21f53d0d3866a2abe4363749b6e","919592d3efe0a61dd40ff1812202c14c58ca1a78d880610ef1ff6cf5f3f0a33c"],"ts":1793238016,"cid":"poa-mainnet-1","sig":"JRqtG91U8rehRFPiRbCM88q1H4PQrNgmEaoC81Ey7KAFMy2QNjFWbh2xGp3uzo47npxuqmSpGEGiov85Mz8j594"},"checkpointed":{"height":151254,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T06:34:30.969Z","checkpoint_height":151254,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}