An ISO 4217 alpha currency code. Braintree only accepts specific alpha values.
Apple Pay ConfigurationObjectcurrencyApple Pay Web ConfigurationObjectcurrencyExchange Rate Quote InputInputbaseMerchant AccountObjectcurrencyMonetary AmountObjectcurrencyMonetary Amount InputInputcurrencyPay Pal ConfigurationObjectcurrencyPay Pal Recurring Billing Plan Metadata InputInputcurrencyRecurring Billing Subscription Status EventObjectcurrencySelected Pay Pal Financing Option InputInputcurrencyThree D Secure Lookup Transaction Information InputInputgiftscalar CurrencyCodeAlpha