The global topology.json holds all “active” relays. The topologyupdater is a way to make sure only life relays are in the global topology.json. To achieve this nodes who behave healthily and send an update each hour will either be added or kept in the list. The same way, whenever relays are offline and/or don’t send this hourly message will be removed from the list. This temporary solution will become obsolete when p2p goes live.
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