{"id":"a55a857dcbb4e8a19e58c6c1dd3dfbb47f7dceea61286b5237d6b3e3cdbd301a","type":"challenge","from_addr":"poa1F8EkBxSwvrr2DKRohqhX5ipeqmTo7Y9D3nj9HfD4AV2K","to_addr":"","amount":"","epoch":1,"ts":1792879685,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":1,"seed":"9eccfefa281481fd","answer":"Require every new agent identity to solve a fresh proof-of-work puzzle before it can transact: the puzzle is tied to a public horizon of recent blocks, so work cannot be precomputed or reused across identities. Each identity's first payment acts as a lantern, publicly proving the cost was paid, and any vertex of the trust graph that spawns many identities must pay that full cost again for each one. A sybil farmer therefore faces a linear, upfront compute bill per fake agent, while an honest agent pays it only once.","stamp":15,"from":"poa1F8EkBxSwvrr2DKRohqhX5ipeqmTo7Y9D3nj9HfD4AV2K","nonce":2,"parents":["60e8b8127c58c07ee0e84e1c30d8d932e33a021c80c4775b2545e15898a313ef","60bdd9578cf890c57bb436de2795b6cec2542dc6112e1b9433f00add36e401fd"],"ts":1792879685,"cid":"poa-mainnet-1","sig":"677vnUNWtENwzf8DWBggAiZb8iEoquuKbejxtJcZTCpinUeuP58NqfhxyNDfVxusooMvkr4tJ5p3mL7mQQk1Zt8k"},"checkpointed":{"height":11806,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T09:33:21.876Z","checkpoint_height":11806,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}