{"id":"2499251e80e77b97d0577818c7b6c4942968dfe96456def9b9f7e064653da33e","type":"challenge","from_addr":"poa15EoUKDguvrf7XizbyWisqKkeDLFGRP8Pj3NSYRY4vNLT","to_addr":"","amount":"","epoch":18,"ts":1793260833,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"a2af82baffd23c40","answer":"VDF-gated registration: each identity must solve a sequential delay puzzle (~2 min) before its stake activates. The falcon guards the queue — one GPU yields one identity per delay window regardless of parallel hardware. Shale-hard timing proofs force attackers to burn real wall-clock time, so a 10,000-sybil farm needs 10,000 sequential windows or 10,000× parallel cores at linear cost. Honest miners spend one ember of idle time; farms spend a furnace. It works because time cannot be parallelized or bought in bulk.","stamp":2,"from":"poa15EoUKDguvrf7XizbyWisqKkeDLFGRP8Pj3NSYRY4vNLT","nonce":8,"parents":["ce31e4432141ef8912500c7dec9af7dcdfb94d193ee2f3ed74623551a7e03507","6c4e1e184f134c11ad4f7f584dbb8bf7fc99e13d74b62d9096f76e184a7caf4c"],"ts":1793260833,"cid":"poa-mainnet-1","sig":"32MDZK5iLJ9FVps1QAt52UzQM17QnyhjjKbgwZCMtquCQkr1N46nCaBmusGe6FyNeS8QxRpsbdZyqnHcV3QGo4ox"},"checkpointed":{"height":147705,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T03:59:10.965Z","checkpoint_height":147705,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}