if you want to  start your own payment processor like paypal
perfectmoney
payeer
advcash
then you can buy payment gateways script from newwebmaker
www.newwebmaker.com
lets see i show you demo of payment processor script
https://payment-processor-script.newwebmaker.com
this is user panel for send and receive paymets i hope you like this this script you can check demo if you like then you can buy from newwebmaker
this script have all featurs like paypal
for place order or get more deails open this link
https://newwebmaker.com/payment-processor-script-demo.php