How to get data from a function (composition API)?

Question

JavaScript

I decided to try the new composition API, there are 2 functions, both in different files, one of them is for a separate component (function 1), the other, so to speak, is global (function 2). A string from the input is passed from the component to function 1:

<input type="text" v-model="text"  class="input" id="input-text">

, further in function 1 it is divided into an array

export function toCode(){
    let text = ref("");
    let array = ref([]);
    let obj = reactive(scanArrays())

    watch(text, () => {
        array = text.value.split("");
        obj = scanArrays(array, deciphering, cipher)
        console.log(obj)//тут выводится все как надо
    })
    return{
        text, 
        ...obj
        
    }
}

and passed to function 2:

export function scanArrays(arr, decip, cip){
    let err = ref({show:false, element:""});
    let result = ref("");
    const func = () => {
        result.value = "";
        err.value.show = false 
        arr.forEach(el => {
            if(!decip.includes(el)){
                err.value.show = true 
                err.value.element = `" ${el} "`;
                return
            }
            let letterInd = decip.indexOf(el);
            result.value += cip[letterInd] + " ";
        });
    }
    if(arr) func()
    return{
        func,
        result,
        err
    }
}

, but the component receives an unmodified object

setup(){

    return{
        ...toCode(), 
    }
  }

, although function 1 outputs to the console exactly what I expect as a result. Please tell me what is wrong here.