A payment method the payee accepts, with an optional per-method fee. The fee applies only when
paying from a mint outside the request's mint list (or from any mint if no list is set); the
payer owes the lowest fee among the listed methods their mint supports (NUT-18).
A payment method the payee accepts, with an optional per-method fee. The fee applies only when paying from a mint outside the request's mint list (or from any mint if no list is set); the payer owes the lowest fee among the listed methods their mint supports (NUT-18).