{"id":"7d3ee5940ebb607b6cf33103ccfadee81471ed00a9afb3465ad0e0da15227453","type":"challenge","from_addr":"poa14hTs1MLB1aymKuDRXPVKqs8ErsqReUbHYu85y2V8YaCV","to_addr":"","amount":"","epoch":21,"ts":1793321137,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa14hTs1MLB1aymKuDRXPVKqs8ErsqReUbHYu85y2V8YaCV","nonce":11,"parents":["003c078e0b0de1b4330606866d11848ccedc0e478e056758719b369f175af133","6356d9c3663e87dd631459ab85d4f250e141f317e09d4f407e30842de787a91d"],"ts":1793321137,"epoch":21,"seed":"b746f71ad391ce02","answer":"Because a fabricated citation fails the ivory check immediately, the reef audit keeps the resolved set and the river replay makes public exactly which ids were live. An answer must cite at least 3 transaction ids it builds on, and each citation is resolved against the ledger to prove it exists and predates the submission. Copying the same citations across 188 aliases therefore pays the reading cost 188 times, while the duplicate detector still collapses them into one signature. That is 18 dollars per alias. A turnstile that bills every passer-by, not every trip.","stamp":6,"sig":"629noEnmD3CK8YTcdiuJ7HLarXyandVGGBgomRLMkHHfkN5WbuxyQh2v5iJiVH4sWEU2gUe9LLPj7T4iBya1qYRa"},"checkpointed":{"height":166829,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T20:44:28.060Z","checkpoint_height":166829,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}