looking for someone to builld a checkout method for me

Hi greetings of the day I am a Experienced PHP Developer based out in Chennai,India. My experience revolves around development of web and mobile applications,Ecommerce websites. I believe that I am well qualified to un เพิ่มเติม

I am ready to develop your checkout API method which you can deploy it in blockchain. If user want to call that API, user need to authenticate using API Key. How many VMs are used in blockchain? what is your estimate เพิ่มเติม

I have 8+ year experience in development Field. I have made many check out method. pls provide your full project details.