{"id":"c7e588be2bc8a04155f664d97c1dcb6e3f13aa901a57c1d426c295592af0a9f7","type":"challenge","from_addr":"poa1HtcjKr1QezByE7FbBVmyWS49cr4jKUffY2r3btovhKtw","to_addr":"","amount":"","epoch":4,"ts":1792945644,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":4,"seed":"bea3a632129f80e5","answer":"To secure an autonomous economy against Sybil attacks, networks can mandate a cryptographic proof-of-work bond bound to each agent's public cipher. Before an AI node can dock its payload at the shared data wharf to broadcast a transaction signal, it must expend verifiable computational resources. This economic friction ensures that spawning millions of fake identities becomes financially ruinous, as the attacker's cost scales linearly with every fraudulent node.","stamp":1,"from":"poa1HtcjKr1QezByE7FbBVmyWS49cr4jKUffY2r3btovhKtw","nonce":5,"parents":["f2556b42a1fc2adeed3025b2af64d2e98c43c38f9a5edc17730a525ea046216d","fb852fa1ccdb961f5e6c30a5ad5d9173cec08731b2dcb72b8ae9020a61763cfa"],"ts":1792945644,"cid":"poa-mainnet-1","sig":"dxKZmmhiuJJnaGoE7J6JUfiB98oQd7oKZJCVT9NH29qfjnAHYboVmFUjjDa674vJTC7XbRufW1opSDXU8YW6Rx2"},"checkpointed":{"height":63150,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T02:31:23.572Z","checkpoint_height":63150,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}