[Bug?] LineItem.gross_amount is used in xml unvalidated for ChargeAmount

[SubandiK]

Here

ruby-secretariat/lib/secretariat/line_item.rb

Line 109 in ae0e9ac

Helpers.currency_element(xml, 'ram', 'ChargeAmount', gross_amount, currency_code, add_currency: version == 1, digits: 4)

We use item.gross_amount to set ChargeAmount for GrossPriceProductTradePrice.

It turns out that it doesn't actually matter what we pass in there as gross_amount, unless it doesn't work with BigDecimal() all validations pass.
So there is no validation going on besides the type. Is this a problem that should be handled in this gem? Or is this a problem with the existing schemas?

To reproduce just change the gross_amounts in the existing specs, see they don't care.