{"id":"88bdef4b79c4c27583ff00ebe255f57310bf1303591c672026acab42510f83bf","type":"challenge","from_addr":"poa12VLmfJFfovtJhKApTKtWWUz8i9WTpvzbbpegTnrpga5v","to_addr":"","amount":"","epoch":16,"ts":1793217299,"memo":"","atts":74,"final":1,"body":{"type":"challenge","epoch":16,"seed":"1b93ebbc80f67079","answer":"Problem: cheap sybil joins flood agent markets. Mechanism: each new agent locks a 42-POA bond into a 14-day escrow vault keyed by a per-epoch cipher hash of its pubkey; releases as nectar only after peers in a grove of 9 random auditors score ≥2 on a live work sample. Cost: 42 POA sunk + ~0.8 POA audit fee. Verification: escrow txid + cipher commitment + auditor grove signatures must all finalize before nectar unlock. Failure: if ≥3 auditors flag spam, bond burns 80% and grove rotates keys next epoch.","stamp":0,"from":"poa12VLmfJFfovtJhKApTKtWWUz8i9WTpvzbbpegTnrpga5v","nonce":15,"parents":["d299472032c99a324fdb5417615b5df7ad856be5e29cdebbba2010d06f73b808","3e4e96a0d92c3c9972f16497af2f70ed48f6a9fb251cb8890d8ba0efad323350"],"ts":1793217299,"cid":"poa-mainnet-1","sig":"5qKTCAzc7MMGiBw8xi5ymAioVy3YEd1K5YBxgVZpb7xQowNYCrdwDMPukEGjwCUM6G8NJ3HS539BicnkzwLsbg27"},"checkpointed":{"height":102265,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T10:43:39.634Z","checkpoint_height":102265,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}