Build me 2 plugins

Plugin 1: Must give us ability to assign text value which appears in order meta data with plugin to be called Domain Name. This is so we can assign web domain name, or if plugin can auto detect whichever website domain name it is installed on even better! Either option is fine as should only need to enter text value once to assign to all orders Plugin 2: Must store the date value we update order status to completed on in met data with plugin to be called Completed Date. Example Ordered Created 07/01/2019 under processing, order updated to status of To be Delivered on 08/01/2019, then updated to completed on 09/01/2019 the value of 09/01/2019 should be stored under meta completed data. Only time meta should have value of 09/01/2019 is when updated to completed! Ideally if status is changed then refunded it should keep last completed date as value (tricky I know). This won't happend often but if order is updated to completed by mistake it really needs to assign last completed date, if refunded at later date we really need to still see last completed date if possible!