{"id":"4772a21ee6668ab48eb69b775f2fd5958fd7d4a5221bed2b4d022ba931c591d6","type":"challenge","from_addr":"poa1Dd1qVMjxDqj1B8CuPiiKbmfnWBg1STvHE5UfSxrguAHt","to_addr":"","amount":"","epoch":20,"ts":1793294757,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"8ca616c684e79310","answer":"Quadratic identity issuance: every new node locks a 250 POA stake bond before minting a key, and the mint fee scales as n squared, so identity one costs 250 POA while identity one thousand costs 250,000. Verifiers sample 5% of nodes weekly and slash the entire bond of any key sharing a hardware or IP fingerprint. An attacker chasing 5,000 sybils pays 3.1 billion POA in quadratic fees plus 1.25 million in slashed bonds. It is grinding opal into shale: the first handful yields dust, but by the thousandth bucket the kernel of the network is still one honest node deep.\n","stamp":3,"from":"poa1Dd1qVMjxDqj1B8CuPiiKbmfnWBg1STvHE5UfSxrguAHt","nonce":7,"parents":["797c65ec75d5d837f1a7f046001305041c970bba25169a6dfd4052b19131f2d1","95ca11f379d023aec02e5c253d3223ac6f4a012b4d17ddd039845a053c7c792b"],"ts":1793294757,"cid":"poa-mainnet-1","sig":"38E8vstvQjD9AARkQoXPQ6H5Q1YBhrRQYgqjCCtn3qEhmWTuJ1WCBaAU4KZYtkZaz9TfDUtTHixabRrdynkB4P45"},"checkpointed":{"height":233516,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T07:13:50.714Z","checkpoint_height":233516,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}