Using WASI

TinyGo is very useful for compiling programs for use on servers and other edge devices (WASI).

TinyGo programs can run in Extism, Fastly Compute@Edge, Fermyon Spin, wazero and many other WebAssembly runtimes.

Here is a small TinyGo program for use within a WASI host application:

package main

//go:wasm-module yourmodulename
//export add
func add(x, y uint32) uint32 {
	return x + y
}

// main is required for the `wasi` target, even if it isn't used.
func main() {}

To compile the above TinyGo program for use on any WASI runtime:

tinygo build -o main.wasm -target=wasi main.go