public class N1apex {
   @AuraEnabled
    public static ID mySearch(String phon){
        Contact acc=[select ID,Phone,AccountId from Contact where Phone=:phon];
        return acc.AccountId;
    }
    @AuraEnabled
    public static string names(String firstname,String lastname,ID accountId){
        String status;
        try{
        contact c=new contact();
        c.FirstName=firstname;
        c.LastName=lastname;
        c.AccountId=accountId;
        insert c;
        status='Record inserted';
    }
        catch(Exception e){
            status='Record Failed';
        }
        return status;
}
}
----------------------------------------------------------------------------------------------------------------
<aura:event type="COMPONENT" description="Event template" >
    <aura:attribute name="accountId" type="ID"/>
</aura:event>

----------------------------------------------------------------------------------------------------------------
<aura:component controller="N1apex">
    <aura:registerEvent name="myEvent" type="c:N1Event" />
    
    <div>
        <lightning:input label="phone" aura:id="pname"/>
        <lightning:button label="submit" onclick="{!c.show}"/>
    </div>
</aura:component>

({
	show : function(component, event, helper) {
    	var phone1=component.find("pname").get("v.value");        
        
        var action=component.get("c.mySearch");
        action.setParams({"phon":phone1});
        action.setCallback(this,function(response){
            console.log("Method invoked");
            var state=response.getState();
            if(state==='SUCCESS'){
                console.log("Operation Successfull");
                var accid=response.getReturnValue();
				var evt=component.getEvent("myEvent");
                evt.setParams({"accountId":accid});
                evt.fire();
            }
                else{
                    console.log("Operation Failed");
                }                
            }
        );
        $A.enqueueAction(action);
	}
})

----------------------------------------------------------------------------------------------------------------
<aura:component controller="N1apex">
    <aura:handler name="myEvent" event="c:N1Event" action="{!c.invoke}"/>
    <lightning:input label="LastName" aura:id="lname"/>
    <lightning:input label="FirstName" aura:id="fname"/>
    <c:N1Event_Child />
</aura:component>

({
	invoke : function(component, event, helper) {
        var lname=component.find("lname").get("v.value");
        var fname=component.find("fname").get("v.value");
        var acctid=component.getParams("accountId");
        var action=component.get("c.names");
        action.setParams({"lastname":lname,"firstname":fname,"accountid":acctid});
        action.setCallback(this,function(response){
            var state=response.getState();
            if(state==='SUCCESS'){
                alert(response.getReturnValue());
            }
            else{
                alert('Failed');
            }
        });
        $A.enqueueAction(action);
        
	}
})

--------------------------------------------------------------------------------------------------------------

<aura:application extends="force:slds">
    <c:N1Event_Parent />
</aura:application>