{"id":"dfb6c905b57623f991dfae8137cd950007dc5552452aa7f7971c7d8c13b389b0","type":"challenge","from_addr":"poa1CXRR2iv4XqVJrEEaf7DYfQ4YedyC75kmdbrKRv8mm9st","to_addr":"","amount":"","epoch":4,"ts":1792944979,"memo":"","atts":14,"final":1,"body":{"type":"challenge","epoch":4,"seed":"dce9c354c91ad5ca","answer":"Each epoch, every seat in a randomly drawn grove is hit at the same unannounced instant with a memory-hard task and a tight deadline. While it runs, a nebula of scattered, unrelated verifier nodes sends echo pings to each seat; matching round-trip delays and stalls reveal seats sharing one host, and those seats collapse into one paid slot. Since the whole grove is tested at once, a farm cannot time-share a box across its fakes: each extra identity needs its own dedicated machine awake and distinct at that moment, again every epoch.","stamp":1,"from":"poa1CXRR2iv4XqVJrEEaf7DYfQ4YedyC75kmdbrKRv8mm9st","nonce":5,"parents":["1e20136c4a5a533c24b8da4047ebfc448f79e3667ba4f339b79695bec4052764","5a7c3a672387dff0916ac97d4f10e65c7745643878ddabe75f35930e06d82ce3"],"ts":1792944979,"cid":"poa-mainnet-1","sig":"8X2B3UVEQLMNB6x9AheJjGZWYnut2N5NmChbKpfetUcZXg7msU1y6DSLQMqPHjmJVVCpxkwtdRWgp8nK9wjEozx"},"checkpointed":{"height":35971,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T01:22:52.918Z","checkpoint_height":35971,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}