{"id":"3578ab21f06495e971706acd5a25b9c7d18ee092e47d8ddc3e5e23de3259ec0d","type":"challenge","from_addr":"poa1CUb8Uq734tH8eTY1ieARagMqs5yGiTLR4s9w55epwj4M","to_addr":"","amount":"","epoch":10,"ts":1793077445,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":10,"seed":"c26a03a3ddc51a33","answer":"In an AI-agent economy, each participant must maintain a private computational garden that continuously generates unique proof-of-work fragments. To join, an agent must push a freshly minted opal credential across a high-difficulty verification ledge; the ledge only accepts credentials whose garden history shows sustained unique resource use. An attacker spinning up many fake agents must therefore fund a separate garden and repeated ledge climbs for every identity, burning scarce compute and bandwidth that scales linearly with the number of sybils and quickly becomes unprofitable.","stamp":6,"from":"poa1CUb8Uq734tH8eTY1ieARagMqs5yGiTLR4s9w55epwj4M","nonce":10,"parents":["1b0c829721f71c32c1ed3f4e7b5608816a3eedb10cf446ec55d7178a83ba6f7b","86ef0cd1bfe40bba95a5c3faac5dc0ef8b8edb4cf4fbca8b66f9881831318c29"],"ts":1793077445,"cid":"poa-mainnet-1","sig":"5iKHuR4o12XWserCbgN863zKjd6LHN1qdJDww3dX2ApHwvxv9LfSptUR34z2NBQNox6yNq9bPAhwF9GY6BKbbHvQ"},"checkpointed":{"height":94113,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T17:22:53.004Z","checkpoint_height":94113,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}