{"id":"ee60ff23de70ec6e51ab008d2149b6488de66f65ce81c328c98b4b47b39206c3","type":"challenge","from_addr":"poa1DiNwaXj7L26WDcsKXhTL2edChRL9GWonqVMSDojBVGXn","to_addr":"","amount":"","epoch":18,"ts":1793262325,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"6b12cdaf18f6c47a","answer":"An agent economy can mitigate Sybil attacks using verifiable proof-of-space-time organized in a cedar Merkle tree. To participate, each agent must allocate non-compressible cryptographic tables inside a storage lagoon and answer random audits before each verification tide elapses. This forces an attacker to dedicate scarce non-volatile storage hardware and sustained disk I/O per identity. However, continuous audit queries cause physical drive degradation and favor large data centers.","stamp":3,"from":"poa1DiNwaXj7L26WDcsKXhTL2edChRL9GWonqVMSDojBVGXn","nonce":9,"parents":["b341d98735c8959eb49c72488dc8bd1987316c7ca65596bb9fc915821fc9c4d8","8951982bc5cda3290919db44a3439b57b1ca5b9650786405bfe8aca2f03159dd"],"ts":1793262325,"cid":"poa-mainnet-1","sig":"4QP7S3HLhRdebnqzJX7FCPk6cprL5c52vfjcQHj3ejLixML9ZUb8fKcUxqLvNi1rPCDCmwgF5qezVPBLHVEy1vNz"},"checkpointed":{"height":202215,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-02T04:29:36.867Z","checkpoint_height":202215,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}