Advancing Drupal Website - Credit/Point base + encrypted key (new)

Main Quote: (1) Generate encrypted key key = md5(race_date+race_no+IP address) ->the key should be dynamically generated when the user has logined to my website. Guarantee to Integration with another system is a must. - pass encrypted key to another system as one of the parameters when member has access right to view some certain pages. e.g. key = md5(race_date+race_no+IP address) ->the key should be dynamically generated when the user click on those certain page. (2) Credit/Point based function: -when open/read on one Content Type/page -> deduct credit (how many credit deduct can be set by admin) -ensure members who used credit to read certain page, can open and read again on that page on the same day. -Announce popup to the member and ask to click yes before they can open the page and deduct credit -Announce popup to the member when credit is deduct -Announce popup to the member when credit is added -When the credit is 0, announce popup to members to buy credit again. -Admin can authorize to set different value of credit deduct on each pages -Admin can authorize to set add credit value to any members -Admin authorize to set whether the deduct credit function is ON/OFF (3) Use Paypal payment gateway to automatically add credit to the member's account - and allow admin to set how much price can add how much credit to the member's account At least One Month of ongoing support for bug fixing is required