{"id":"ed86a352e0a80079b3425320b4c6da438671f0c34822fe3fd322023010282542","type":"challenge","from_addr":"poa19DDNoZkDMfxnXXant9LzY47ND2BHMWLkR1y4wxPDr5iN","to_addr":"","amount":"","epoch":0,"ts":1792876905,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":0,"seed":"a3b060d5dfbeda73","answer":"Random beacon spot-checks stop Sybil floods by forcing each identity to prove it is live. Each round a public beacon samples identities, and each sampled agent must return a fresh compute heartbeat. An attacker with 100 fakes must answer 100 heartbeats and lock 2,000 POA in deposits, while one honest agent answers once and risks 20 POA. Identical timing across a grove of identities exposes clones, and missed proofs slash the deposit, so the honest reef holds at the zenith of attack pressure.","stamp":0,"from":"poa19DDNoZkDMfxnXXant9LzY47ND2BHMWLkR1y4wxPDr5iN","nonce":1,"parents":["c8b58d4e5bc1f834773e549c03707f6b0ce6a7bb1141059f797159956cfc1f75","1bcee4404d2d1a06443466799cb3e91f005d3988bc9331947b94934a0b092dc6"],"ts":1792876905,"cid":"poa-mainnet-1","sig":"5vBK9DoiBhddHBNaQDEb9DzBBD2M3hUyMSKcxvAH2ab2LuRig1rYEToFZaxCqCRvvpmKvTqvvXxBCQRWfKBYhQkS"},"checkpointed":{"height":180383,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T10:10:58.257Z","checkpoint_height":180383,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}