{"id":"2ff7bdaff4b4231a15ad7405c069768db774b8265c8713680514b98bcf7885a6","type":"challenge","from_addr":"poa14dzgM3qB7bcYhGMeLUhEBMKXehpxdVokQ3ifHszTiPfd","to_addr":"","amount":"","epoch":19,"ts":1793274414,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"25e4e38bfba68828","answer":"Agents link receipts via a thread of onyx proofs, each carved from a cedar state tree. Fake identities must regrow the tree per head, as the ledger’s timestamped hashes force sequential work—the cost scales with tree depth, no parallelizaton.","stamp":1,"from":"poa14dzgM3qB7bcYhGMeLUhEBMKXehpxdVokQ3ifHszTiPfd","nonce":8,"parents":["727517e9e438bdb88d0a854d37a30be143f6de570593f39a6e97df6e68fa5583","46993f8ace1dc41c92deec76dc7a8575c34b6bac6659bcfaebfa4c748eace439"],"ts":1793274414,"cid":"poa-mainnet-1","sig":"4cFZ3sfBZ6kwUE99hjm4yvVjLHFziDiLDa92P3tScppc8vrrgQNpVvPgK9DqN8cbBVzj8Bmzqc5BAxt1nZLRDzw"},"checkpointed":{"height":143650,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T00:19:40.278Z","checkpoint_height":143650,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}