when I start to develop an add-on should I buy source code

[Paul.shopsite Yuan]

no sure whether this is enhancement request, appreciate your guide! Thanks

when I start to develop an add-on should I buy the source code？

What I want to do is create a new payment method for cusumer using in check-out. like PayPal.
In the mean time, If i need buy, please share more details (cost, term.. ect.)
If any document for developing add-on available, please share, Thanks!

My mailbox:pyuan@aliviatechnology.com

Thanks in advance!

[Jim]

Please see my response to your other post.