fpPaymentAuthorizePlugin

It depends on fpPaymentPlugin

You have to enable "fpPaymentAuthorize" module

settings.yml

all:
  .settings:
    enabled_modules:
      - fpPaymentAuthorize

You have to create fp_payment_authorize.yml file in to yours config folder and configure it.

fp_payment_authorize.yml

all:
  form_hidden_fields:
    x_login: 'API Login'
    x_tran_key: 'Transaction Key'