Welcome to FFX

FFX is a command line tool providing FIDL communication with multiple Fuchsia devices via overnet. It is written in Rust and is made of three parts:

• CLI
• Daemon
• Remote Control Service (RCS)

CLI

The Command Line Interface (CLI) provides the UX for FFX. It is responsible for:

• Parsing user parameters (CLI Parameters)
• Communicating with the daemon (starting it if necessary)
• Routing parsed parameters and requested FIDL proxies to the proper code path for execution

Daemon

The daemon runs in the background on the host device and manages:

• Target discovery
• Target lifecycle management (flashing, provisioning, and package serving)
• Facilitating communication with target devices

Remote Control Service

The remote control service runs on target devices and is responsible for providing access to the FIDL services running on the target.