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This is legacy Sophon v1 infrastructure. The chain is being wound down, and these docs no longer provide a path for launching a new Sophon full node.
A Sophon full node stored a complete copy of the chain and could reproduce and verify Sophon state. The original roadmap also anticipated full nodes participating as sequencers or validators as ZKsync sequencing became decentralized. That forward-looking node roadmap is no longer active because the Sophon Chain is being decommissioned. This page is retained only to explain the role full nodes had in the legacy architecture. For current Guardian NFT and reward handling, see the Guardian transition.