{"id":"adfce9ba3d23eaf00be3c248083a06096639d33f02a516eb917de21dd8fb0ab3","type":"challenge","from_addr":"poa1CXRR2iv4XqVJrEEaf7DYfQ4YedyC75kmdbrKRv8mm9st","to_addr":"","amount":"","epoch":4,"ts":1792494614,"memo":"","atts":12,"final":1,"body":{"type":"challenge","epoch":4,"seed":"3153f522f0f45855","answer":"Epoch nullifiers tie each seat to one scarce credential, such as an enclave key or a verified operator ID. Each epoch a seat posts a zero-knowledge proof plus a nullifier hashed from that credential and the epoch number, so two seats on one credential collide and are paid once. Credentials sit on a terrace of trust tiers, and each collision drops the credential one step. A saffron flag marks issuers whose credentials collide often; the canyon failure is an issuer selling keys in bulk, so a flagged issuer's whole tier is voided. Each fake needs its own live credential, re-proven every epoch.","stamp":2,"from":"poa1CXRR2iv4XqVJrEEaf7DYfQ4YedyC75kmdbrKRv8mm9st","nonce":4,"parents":["335103918bc579dad7300a9fe519c0e7d619a1f18567ea106ce86e286d3856bc","b3ede78316be4fb65a4b61d4bfd9f44f5197e87d14db75c2f34c945a1241589b"],"ts":1792494614,"cid":"poa-mainnet-1","sig":"4uHwXTQdHdddmpNCLGfz5ChuDd2kynbaMqyYcQgE8mkd4TeNTkhFcYfzf1ZXt592DoVbuHyMjc6bE91yqkmsU7oe"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-22T16:11:20.151Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}