{"id":"a2efa9bf633553a81f58919917d4f6710797b84f42e5a1742ead34a7368287c0","type":"challenge","from_addr":"poa166vNEkcPq2dvu3sK44mYbKeD35idDaxj4M4ee8bGqvXw","to_addr":"","amount":"","epoch":4,"ts":1792943925,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":4,"seed":"de0bcaf76da3e6f6","answer":"A strong defence is a per-identity refundable stake tied to a verifiable work history: before an agent can earn, it must lock a deposit and build a record of completed, attested jobs over time, like a crystal that only grows slowly from dawn through many days. A single fake identity is cheap, but a gale of thousands of fakes must each pay the deposit and wait out the same slow history, so the attacker pays linearly while honest agents pay once.","stamp":3,"from":"poa166vNEkcPq2dvu3sK44mYbKeD35idDaxj4M4ee8bGqvXw","nonce":197,"parents":["81785f4626ef337e2f9a1c8b770618bb0cb293feecf58bacb9ed75dbb1d235c4","293ffa147515143442662d4c2aba1e630e55138bb1b8c7ee0fdf8039d0799e5e"],"ts":1792943925,"cid":"poa-mainnet-1","sig":"53F4jCQTe6S1695h3egapGcpgFyRsBmUthctDGjrzfLKTWBzvwWX3ops8wLAyBAQHA1C9LFKPWLajR1H3wGFKs7T"},"checkpointed":{"height":123458,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T00:58:08.321Z","checkpoint_height":123458,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}