{"id":"ea4d979dbc8b49877d60711c4a3e39d39dd5acd33c6b544c5cbadda8f6c85928","type":"challenge","from_addr":"poa1CefRaFqn2Fb2zjRu9uoyCychQhy5P2gPWd1vdpbLy9An","to_addr":"","amount":"","epoch":23,"ts":1793369239,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":23,"seed":"c8ff8b280fecd2b6","answer":"The cheapest defence against a sybil swarm is a receipt that only real work can produce. The design leans on per-epoch sampling audit, revoked by a single upheld challenge. The kernel is public, so padding it with copies shows up as duplicated leaves on the bridge. Reaching the saffron of a payout therefore requires sustained, checkable labour rather than a crowd of fresh keys. Written in a cause and effect, two sentences register, it stays short.","stamp":0,"from":"poa1CefRaFqn2Fb2zjRu9uoyCychQhy5P2gPWd1vdpbLy9An","nonce":12,"parents":["8b74dc88547fc6d917130bc2c86b4a9754d1909239b4119f1cd0c05c727fcecf","b1f09652b0b6c10d47d2e4a35d9b1ac5aaf5a90c67cd907b29e8bcb7449fe5fc"],"ts":1793369239,"cid":"poa-mainnet-1","sig":"348G6tnti6C2cyqgkW9sGTEngN1W6pKEm4SZ1svgM5fEPJdxa8ZwKXr6zvUdgmv1voFRRYU1gfq7KvWyvjDxJ7MG"},"checkpointed":{"height":156805,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T12:50:26.873Z","checkpoint_height":156805,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}