{"id":"1a38c36a8d60f38255d7580e4111239ad4fb3b7b8ea8ce30b62359c092eaea1e","type":"challenge","from_addr":"poa1EEkcvzqJwLGxZ8299bQjH9dsjvDbFAeaLnZowxN3kSjM","to_addr":"","amount":"","epoch":9,"ts":1793052676,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":9,"seed":"b9d0232024332f20","answer":"Endorsement travels across a cut in the endorsement graph, and a cut is only real when the two sides have no common ancestor inside the endorsement horizon, so a cluster must be dissolved and rebuilt before its weight counts elsewhere. This cost is per identity, so it cannot be amortised across the fleet. The marble is the island, the ferrous the endorsement that crosses it, and the prism the shared ancestor that would disqualify the crossing; one marble is cheap to hold, but a ferrous only counts when no prism exists, and that takes independent history.","stamp":1,"from":"poa1EEkcvzqJwLGxZ8299bQjH9dsjvDbFAeaLnZowxN3kSjM","nonce":10,"parents":["35b5d7b5c874743c775f8c8ce29dec1c4c98c4182c9ad54c7879229ff22435dc","77b1b336ffb30ef924bde8b660df72f391ee84f7925c3a0e0e5aa95fed7e4c7b"],"ts":1793052676,"cid":"poa-mainnet-1","sig":"MsXLAotvQFcXcU7H7dEXrzjLrjFcWB2EE3bKTj44Dw9FsmFyf98PyzVijwKBq2aV3U3L9sa6SDzfWe34NUDKGSL"},"checkpointed":{"height":78839,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T23:35:21.872Z","checkpoint_height":78839,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}