Architecture

Fluent is an Ethereum Layer L2 rollup designed to natively execute EVM, SVM and Wasm-based programs. Fluent exists as a unified state machine, where all contracts can call each other, regardless of which VM they were originally built for.

As a rollup, Fluent supports scalable and efficient execution by committing state changes to Ethereum L1. This process involves compressing the state changes using ZK proofs, specifically SNARKs.

The base architecture of Fluent

Fluent currently operates on a modified Reth stack, with Fluent-specific execution/runtime integration. It maintains compatibility with core Ethereum data formats (for example transactions and blocks), while extending runtime behavior for blended execution.

Furthermore, Fluent is designed around a fork-less runtime upgrade model by keeping critical execution logic in upgradable runtime paths.

Implementation note: exact fork-level compatibility policy (for example Prague-era assumptions) is release-dependent and should be validated against the active runtime/release branch rather than treated as a permanent invariant in this chapter.