nextplugin-temp/src/temp.js

function hello(node, input, engine) {
    input.message = 'hello, ' + input.who + '!';
    return input;
}

function add(node, input, engine) {
    input.z1 = input.x + input.y
    return input;
}

function sub(node, input, engine) {
    input.z2 = input.x - input.y
    return input;
}

module.exports = {
    "plugin": "temp",
    "services": [
        {
            "service": "hello",
            "implement": hello
        },
        {
            "service": "add",
            "implement": add
        },
        {
            "service": "sub",
            "implement": sub
        },
    ]
};