how to add bitcoin instant delivery to my web site so when user send bitcoin system check amount and when 1 conformed done send to him code/password.....
Is this easy or i need to pay to someone ??
You should go with the trusted payment gateway API to accept bitcoin as a payment in your site. There are many available in online but you have choose the right according to your need and trust they have in the forum. I have given link below for bitpay gateway API.
https://bitpay.com/bitcoin-payment-gateway-apiBelow are the open source plug in to add in cart.
https://bitpay.com/bitcoin-for-ecommerce#plugins