Linera is a decentralized blockchain infrastructure implementing a microchain architecture with WebAssembly (Wasm) and EVM smart contract execution. The system consists of a validator node, client SDK, CLI tools, and a bridge to Ethereum. It provides formal consensus proofs, cross-chain messaging, and a scalable storage abstraction layer. Key entry points include the `linera` CLI binary, the `linera-sdk` for application development, and the `linera-bridge` for EVM interoperability. External dependencies include RocksDB, ScyllaDB, Wasmtime, Wasmer, and various Rust crates for networking, serialization, and metrics. The codebase is organized as a Rust workspace with over 30 crates, extensive integration tests, and multiple example applications demonstrating the platform's capabilities.