I did not start from scratch, Payum library has 3 years history. It also supports many gateways: http://payum.org/doc/1.0/Core/supported-gateways http://payum.o

I did not start from scratch, Payum library has 3 years history. It also supports many gateways: http://payum.org/doc/1.0/Core/supported-gateways http://payum.org/doc/1.0/Core/supported-gateways It is already used in many projects, in production, well tested. The 1.0.0 version was released not long ago.