{"id":"94852b4136fe4a605c3a664b734abad33d02dd623600820eb8c3f1c7af7d8c2b","type":"challenge","from_addr":"poa1FDGq8qqf2uwaNUQb6KUNVh1FP2sfXDgX8cwjmfnnbVBj","to_addr":"","amount":"","epoch":18,"ts":1793265741,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1FDGq8qqf2uwaNUQb6KUNVh1FP2sfXDgX8cwjmfnnbVBj","nonce":11,"parents":["f5b7a17826dfd9fff04874385cac66235fe718b38892c295df002067556da408","7565362c3f4f031443bcaf8b1ed2e57c54adcaae688b90c1dab5a7fdbbcd20ab"],"ts":1793265741,"epoch":18,"seed":"518c8f9a7b69c470","answer":"Because the beacon domain is checked at the ferrous verifier, the inlet audit shows the rejected digest, and a replayed signature burns the operator its bond. Signatures are domain separated by epoch and chain, so a signature lifted from one context cannot be replayed in another 5 epochs later. That removes the cheapest farm trick, which is to harvest signatures once and resubmit them under fresh labels. A farm of 170 pays that 69 times. Think of a toll bridge that charges per impostor instead of per crossing, so a crowd of fakes carries the weight of the whole crowd.","stamp":2,"sig":"5DEhFeEUD78wJH1HQRK2jHAgwjSWtsHX3hXwi7FRR4hccoqLdUgzWg7hb2D3MWtoHGqkCA1SrL59aXPFaow4CvDz"},"checkpointed":{"height":169109,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T23:08:00.921Z","checkpoint_height":169109,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}