Salesforce Lightning JavaScript Helper method for calling an Apex Controller method

callAction.js

callAction : function(cmp, methodName, params, callback){
    var action = cmp.get(methodName); 
    action.setParams(params);   
    action.setCallback(this, function(response) {
        var state = response.getState();
        console.log(methodName + ' ' + state);
        if(cmp.isValid() && state === "SUCCESS"){
            var result = response.getReturnValue();
            console.log(result);
            if (callback) callback(result);
        } else if (state === "ERROR"){
            var errors = response.getError();
            if (errors) {
                if (errors[0] && errors[0].message) {
                    console.log(errors[0].message);
                }
            }
        }
    });
    $A.getCallback(function() {
        $A.enqueueAction(action); 
    })();  
},

callAction2.js

callAction : function(cmp, methodName, params, callback){
    console.log(methodName);
    console.log(params);
    var action = cmp.get(methodName); 
    action.setParams(params);   
    action.setCallback(this, function(response) {
        var state = response.getState();
        console.log(methodName + ' ' + state);
        if(cmp.isValid() && state === "SUCCESS"){
            var result = response.getReturnValue();
            console.log(result);
            if (callback) callback(result);
        } else if (state === "ERROR"){
            this.handleErrors(response.getError());                
        }
    });
    $A.getCallback(function() {
        $A.enqueueAction(action); 
    })();  
    },
 handleErrors : function(errors) {
    // Configure error toast
    let toastParams = {
        title: "Error",
        message: "Unknown error", // Default error message
        type: "error"
    };
    // use the error message if any
    if (errors) {
        if (errors[0] && errors[0].message) {
            console.log(errors[0].message);
            toastParams.message = errors[0].message;
        }
    }
    // Fire error toast
    let toastEvent = $A.get("e.force:showToast");
    toastEvent.setParams(toastParams);
    toastEvent.fire();
},