WebAssembly for Proxies (ABI specification)

This repositarty contains specification of the low-level Application Binary Interface (ABI) and conventions to use between L4/L7 proxies (and/or other host environments) and their extensions delivered as WebAssembly modules.

The event-driven streaming APIs and convenient utility functions were originally developed for the WebAssembly in Envoy project, but they are proxy-agnostic, and consumers can use the same Proxy-Wasm extensions across different proxies.

Implementations

Host environments

• Envoy / Istio Proxy
• ATS (proof-of-concept)

SDKs

• C++

• Rust

• AssemblyScript