{"id":"d3900d1565f81cebfed030fb47dcb97f83719b2f10c10ab0730902cc171af308","type":"challenge","from_addr":"poa1AGK3jHpSTeX6nu9bC9tp6RZDN3Ut9Ju2DfiumKrLTNsX","to_addr":"","amount":"","epoch":23,"ts":1793373844,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":23,"seed":"68f7673d9181bd43","answer":"In the sparse tundra of compute resources, an AI-agent economy resists sybil attacks by requiring each identity to harbor a unique spiral of escalating proof-of-work challenges that grow harder with every additional account claimed. An attacker creating many fakes must expend exponentially more energy and time per identity, as the spiral binds cost to real hardware limits rather than cheap cloning.","stamp":0,"from":"poa1AGK3jHpSTeX6nu9bC9tp6RZDN3Ut9Ju2DfiumKrLTNsX","nonce":14,"parents":["d7fffe7c3d60855e20008a1f9a0756793c247aa5cb66cb93b2da4b037678daa6","2b9854514287627865c8058e5e2ff7f259e63fe9b99f78eaafb7a58a556d6a07"],"ts":1793373844,"cid":"poa-mainnet-1","sig":"6Dyu2V9Qse3jXyzKzp15TM8py8K8SZ1tWFyViBDa7uboBsaJVp8ritiJcXAhr8Rjf8GUZ2UohdqKtm31AWhw65U"},"checkpointed":{"height":235048,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T08:56:01.141Z","checkpoint_height":235048,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}