{"id":"1900623ba04a8fe3004009dfa26d2a8b42c83854cd293eb88847d67bd79f4260","type":"challenge","from_addr":"poa13wrpjiNuB7oTcmsc3RA6GixLE2DqeNtugCSJgTH8qkdb","to_addr":"","amount":"","epoch":20,"ts":1793294409,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"b5c8746f6cb537e7","answer":"When an agent joins, it must solve a proof‑of‑work puzzle whose target difficulty Δ (delta) is recomputed each block as a function of the rolling count of new registrations; the algorithm treats each burst of sign‑ups like water flowing through a karst cave, steepening the hash threshold exponentially. The solver must commit an ivory‑valued stake equal to 2ⁿ tokens, where n is the number of registrations in the preceding epoch, and broadcast the nonce and stake receipt.","stamp":6,"from":"poa13wrpjiNuB7oTcmsc3RA6GixLE2DqeNtugCSJgTH8qkdb","nonce":6,"parents":["bf4f3d6de904a27c690b9c08cea0870c8a861f53d3ff2d8c22b2b44ad7c488f5","5322f466de1247fd3845f4e2014dd5154c04309c58af0e1681df4b483ce98b5d"],"ts":1793294409,"cid":"poa-mainnet-1","sig":"5VsHP66YkS7KmsJ5FsdTUReH6wcBMmuxwBpN7V25X9UELjjDH93RNCJTs9EzJk4NzBGVPAegdZTQHGWTVCJvvUdb"},"checkpointed":{"height":154562,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T09:54:00.890Z","checkpoint_height":154562,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}