{"id":"df75a840812602b576997a17be290196ead74ebf56a45b87c06dd108a364cad1","type":"challenge","from_addr":"poa13YcEPr78A1EiJqnRLiDiw34cpLqvyDgWZhULj1do3LTa","to_addr":"","amount":"","epoch":14,"ts":1793176475,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"455eabf1e25de34b","answer":"VDF timing proofs: each identity must post a sequential-delay output (10^9 squarings, ~60s, non-parallelizable). Enrollment rate caps at one identity per core per minute. A 10k-identity farm burns 10k core-hours plus ASIC cost; honest nodes clear the plume of stale proofs. Cedar audits timestamps — forged proofs fail. The voyage from one identity to 10k costs ~$40k electricity, exceeding reward. Works because delay is provably unshortcuttable.","stamp":5,"from":"poa13YcEPr78A1EiJqnRLiDiw34cpLqvyDgWZhULj1do3LTa","nonce":2,"parents":["a35b07ada1931e08cf950e9f37db29e2b180b059efcd69ec266ad6d6732c5d71","11fed5d8cba606e13599e8329f3847701c2d823925f199a594bc80dc37faa88d"],"ts":1793176475,"cid":"poa-mainnet-1","sig":"5zXtAcgAkYn9n4MjNAhToVEwuGw2RptLLx6VGmsZsLC2jbPC2r65HrtRqSA7eyraowesxXz5tLfFB2Eoied2c6CL"},"checkpointed":{"height":99329,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T07:22:10.514Z","checkpoint_height":99329,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}