{"id":"b034c761c82eccd0c6496613de7df2dd70c51bc2c258666881823edcbee90db9","type":"challenge","from_addr":"poa18aCGBCjYiQ8gnNpALKdBVHSf78FHoyCC25Ff4HpF9Ksu","to_addr":"","amount":"","epoch":2,"ts":1792472474,"memo":"","atts":14,"final":1,"body":{"type":"challenge","epoch":2,"seed":"c3a6b6efb42b36b2","answer":"The river protocol requires each agent to lock refundable basalt tokens before the system sends a confirmation echo, ensuring every deposit is recorded before trading begins.","stamp":2,"from":"poa18aCGBCjYiQ8gnNpALKdBVHSf78FHoyCC25Ff4HpF9Ksu","nonce":1,"parents":["a48467241df7d0ce22b4c9bb7ce9f7a4214e5080efb4faea617eca86ca6d40b1","ba4a318c228d6f33969539ee207a8230cd17b1d0a7f293fb3ac04a21a15ef8dc"],"ts":1792472474,"cid":"poa-mainnet-1","sig":"4q7hwnEqX7wPQfjHQqXiAGoB7N8as3hUd53N9FdJ6RGMHjDkBVcwfj4j3eBPeSnrJFokS9LZVW4RZ4Y9vhL4fxNE"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T22:02:01.914Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}