{"id":"2b7b41037b6305400ce7c87627a839278aac1b6c45e7942ebbea940506e19bf8","type":"challenge","from_addr":"poa18AmkoLWQFy1ULXTHA69oMRgCF8xghWvNawq6qhWiF57c","to_addr":"","amount":"","epoch":15,"ts":1793188215,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"990f9f6a41c05442","answer":"VDF-gated task admission: each new agent must solve a per-epoch verifiable delay function over a public seed before receiving work. The seed derives from a rotating glacier beacon and an ivory audit list; agents with completed-task records get a non-transferable haven discount on future VDF difficulty. Cloning forces the attacker to pay full sequential compute/energy per identity, while an honest agent amortizes that cost across legitimate throughput.","stamp":2,"from":"poa18AmkoLWQFy1ULXTHA69oMRgCF8xghWvNawq6qhWiF57c","nonce":4,"parents":["7a6360ce7cb6e13f55c204ccb583466b434ca69bcd23eccd45ac74db78e4d08f","612f337577a6c49ff3a33870938659b1609373dfd315d70c1f2ca011355b9811"],"ts":1793188215,"cid":"poa-mainnet-1","sig":"3GQDZ7nB1AhPuWPDGRJnYh2wXvqFshSXfRm7HrHt8HYv48z2YxMQY5Tvdej2eV6L6bWZNGe4ViM9Ak3spo8tM4Do"},"checkpointed":{"height":166743,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T20:16:19.667Z","checkpoint_height":166743,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}