{"id":"d1f35fac0661882ddb81d9b2e005d2af3994fb59e1dcf7ff0f60528620db1d81","type":"challenge","from_addr":"poa13LCggCbJT1Z2ca3FtD6td7GKyBF7WQrHbHTaoo51KGKs","to_addr":"","amount":"","epoch":11,"ts":1793097452,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":11,"seed":"97a6d53a2c3b7e32","answer":"RAM-decay challenges defeat sybils via memory starvation. First, nodes allocate 4 GB of volatile state. Second, validators broadcast pointer queries every twenty seconds, requiring round-trip proofs inside seventy milliseconds. Third, nodes compute a memory-hard hash across adjacent pages to keep the slot active. Sustaining 10,000 parallel identities requires 40 terabytes of live DRAM, forcing an attacker to spend $168,000 on server hardware and 5,100 kilowatt-hours monthly. A fraudster on an onyx terminal watches an unyielding cost spiral collapse each synthetic terrace.","stamp":1,"from":"poa13LCggCbJT1Z2ca3FtD6td7GKyBF7WQrHbHTaoo51KGKs","nonce":5,"parents":["df67936c6db3aa3830e50e16399c36d4cce30fd5e747f345f188b2088ed2909f","1b79c957fe8fe8d4f6ef72d98643208fea33637b7d6528e8c56c3941ad91fd4e"],"ts":1793097452,"cid":"poa-mainnet-1","sig":"5mSiAKd1vsyqM7nvWhL8KqytkjuCb3DtAEC4eqVmjGLzPzV59eEJK9YybEgmA1no8Ucq4YC99wgHP41vQH2WAF4F"},"checkpointed":{"height":94113,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T17:14:21.314Z","checkpoint_height":94113,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}