Simple object predicate macro - fast check for an object you need to check many keys exist on

objectPredicateMacro.ts

const objectPredicateMacro = <T>(keys: (keyof T | (string & {}))[]): ((obj: unknown) => obj is T) => {
  return new Function(
    "isObject",
    "value",
    `return isObject(value) ${keys.map((key) => `&& ${JSON.stringify(key)} in value`).join(" ")};`,
  ).bind(null, isObject);
};

const isStore = objectPredicateMacro<JotaiStore>(["get", "set", "sub", "unstable_derive"]);