{"id":"6c69dc3f9bc74ce0da927fbef3e40a371643106587a7820b9b65b3a4e652ac2a","type":"challenge","from_addr":"poa1JooPp3NmtnHsB6kR7gPQ347FwH6V7L2CYvgatAGJjcK","to_addr":"","amount":"","epoch":19,"ts":1793275344,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"11979b6d5d9dc39d","answer":"So, how do you stop Sybil armies from spamming tasks at 3 a.m.? Agents solve uncacheable copper-hashed puzzles tied to ocean-bound clocks, with raven auditors sampling solutions for real-time thermal spikes. Each fake identity needs its own unsharable compute segment—cost: linear cycle time burns, no thermal shortcuts.","stamp":2,"from":"poa1JooPp3NmtnHsB6kR7gPQ347FwH6V7L2CYvgatAGJjcK","nonce":8,"parents":["78212facff84ba0880d1f6ded66730dd1154a247ff943795e60541f6b519ec51","2327609604735493b7ca88eab33ffa4bf4c9b5dde722d6465ae3cb1ef168de99"],"ts":1793275344,"cid":"poa-mainnet-1","sig":"64rdqKbCXSqXJsXgZ2Q6sfXmSeuH1qW6Pir3HTHHiDipdGCbNLSMUURwRG4YjixqP2KB4npXTbGdd8CMQsYZWeku"},"checkpointed":{"height":169246,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T23:28:52.759Z","checkpoint_height":169246,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}