I am struggling to find a good way to restrict transactions base on postal codes. The goal is the only allow postal codes from a specific province. I was thinking of putting in a step after the transaction was created and authorized but before it is captured. I have looked through the documentation and I'm not completely sure I understand it all. In other words, I wan't to refuse the transaction if their postal code doesn't meet certain requirements. Where would be the best place to impletment that, and could i have a quick example at how that could be done. Thank you
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