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Our main project site is:https://www.autonomypay.com We have already built in API - Application Programming Interface system,but now we just need SCI - Shopping Cart Interface.Its like the system to verify the purchase.As a example i can show you below:
Check PerfectMoney.is SCI - they send md5 string to script for checking is purchase real or not.
LR was using sha1 string for checking is purchase real or not.
Check egopay sci - they have solution to check if purchase real or not. https://www.egopay.com/developers/overview