world.wit

package wasmcloud:example;

// This interface is generic and includes a function to process some
// data, returning a string result.
// We'll use this to send structured data to a component for processing.
interface process-data {
    record data {
        name: string,
        count: u32,
    }

    // Send structured data to the component for processing
    process: func(data: data) -> string;
}

// While processing data, sometimes a component may need to request
// information about the system it's running on. The component isn't
// allowed to access this information directly, so it can request it
// from the provider.
interface system-info {
    enum kind {
        OS,
        ARCH,
    }

    // Request information about the system the provider is running on
    request-info: func(kind: kind) -> string;

    // Example export to call from the provider for testing
    call: func() -> string;
}

// The `world` defines all of the imports and exports our provider can use / must implement.
world provider {
    // Providers `import` functions that it can call on a component
    import process-data;
    // Providers `export` functions that a component can call
    export system-info;
}