The parameters of Validate Payment are availbale if Validate Payment is called in Fill order details. If now Fill order details is called in Checkout scenario A the parameters of Validate Payment are not available in Checkout scenario A.
We're struggling with that right now, too.
We want to achieve that we have a "default parameter" on module level, which can then be overwritten via execution parameter. But unfortunately at the moment only one of both is possible: Either you set a parameter on module level, or you set a parameter on execution level, but have no default parameter.
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I would also like to know that
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