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This page documents the legacy Sophon v1 chain architecture. The Sophon Chain is being wound down; see the migration guide for current actions.
Sophon v1 was implemented as a Validium built with the ZK Stack. A Validium keeps transaction data outside Ethereum while publishing validity proofs to Ethereum, reducing data costs while retaining proof-based verification of chain state. Sophon used Avail as its external data-availability layer. Avail stored the data needed to reconstruct state, while Ethereum verified the validity proofs associated with transaction batches. This architecture is retained as historical context only; it is not a roadmap for a new Sophon chain deployment.