aotds-docks/src/dux/cargo/index.js

import Updux from "updux";
import { action, payload } from "ts-action";
import u from "updeep";
import { createSelector } from "reselect";

const dux = new Updux({
  initial: {
    space: 0,
    cost: 0,
    mass: 0,
  },
});

const set_cargo = action("set_cargo", payload());

dux.addMutation(set_cargo, (space) => () => ({
  space,
  cost: 0,
  mass: space,
}));

export default dux.asDux;