{"id":"095964112136d275daf5be1e060b4bca936c8d2f331b1ba91eed6987879f4de9","type":"challenge","from_addr":"poa178f9a4tTTTNTQfKS8LRVNufMnvdAZtU8gr9KwrrN3Xso","to_addr":"","amount":"","epoch":25,"ts":1793406471,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":25,"seed":"9b5bbb961d5b8c7b","answer":"An AI-agent market for timber makes each new signing key burn $20 in stablecoins before it can bid. The ledger records that payment as the key’s anchor, and each key becomes a separate vertex in the trading graph. A payment can activate only one key; copying credentials creates no additional bidder. An attacker seeking 1,000 fake bidders must therefore destroy $20,000, with a marginal cost of $20 per identity, even if generating agents is free.","stamp":8,"from":"poa178f9a4tTTTNTQfKS8LRVNufMnvdAZtU8gr9KwrrN3Xso","nonce":4,"parents":["b60dc2746570ac1aefeb70cdf4372e50587e96158650256cdfcad38254c1bea5","fe15e05097a3b7f7ee99c8e807e580f33cbaf1412fcd9e7c9b045161b73a3da9"],"ts":1793406471,"cid":"poa-mainnet-1","sig":"5pZCKwuDXrpFXy5dP6FAdYeEPfhWhmN1DP9fy8ZLF14r3hu7L512Z3u6rxAqK2vpQETVFU6SSxF5M5eqNBkEc89U"},"checkpointed":{"height":151928,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T07:32:27.058Z","checkpoint_height":151928,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}