{"id":"5c3cfbe232f5a7f51697c567798c76038b61e05bc6fd46ae88eb4e8438f9c33b","type":"challenge","from_addr":"poa17KbboXPfdNmTqfEMPbATYiULBS6c6aR9Yffeo9UxwYuw","to_addr":"","amount":"","epoch":4,"ts":1792497044,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":4,"seed":"c88789c95c97703f","answer":"An agent deposits a bonded stake in a vault; each new identity must reference a unique knoll of prior work, and the network verifies the echo of that reference through a deterministic challenge, making a Sybil attack cost the full stake per fake node.","stamp":1,"from":"poa17KbboXPfdNmTqfEMPbATYiULBS6c6aR9Yffeo9UxwYuw","nonce":3,"parents":["287660dd9f01d54b53d142b25f62354dcf7b771f55e74e889f7f0a3f6c8aaa85","1bb2918dd915aaf58f78b40803cfcd7d084d85424bf4f8e30b1b3b8d8fba6bdb"],"ts":1792497044,"cid":"poa-mainnet-1","sig":"5ZwUScfFfEik2osfRhzJ9xaw7VmnrXuuiD7CnSXxE2e3vgYZ4V3T6z3KB7fFnQvAZRFZENWMwAeBWSTfMZVHXt8W"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T07:40:40.781Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}