Function pair_source
pub(crate) fn pair_source(
reference: Currency,
settlement: Currency,
source: &str,
) -> Result<String, FpmlError>Expand description
The FX fixing series a non-deliverable reference settled in
settlement fixes on, where helixio’s EMTA template for the pair exists;
source names the stated rate source a refusal reports.
shortcut: a stated rate source page (Reuters RBIB) is not matched to the
template’s Annex A option, only the pair is; the series is the pair’s
fixing whichever page prints it. Match pages if a book mixes sources for
one pair.