Function isCurrencyCode

Returns isoCode is "AFN" | "ALL" | "DZD" | "USD" | "EUR" | "AOA" | "ARS" | "AMD" | "AWG" | "AUD" | "AZN" | "BSD" | "BHD" | "BDT" | "BBD" | "BYN" | "BZD" | "BMD" | "BTN" | "INR" | "BOB" | "BOV" | "BAM" | "BWP" | "NOK" | "BRL" | "BND" | "BGN" | "BIF" | "CVE" | "KHR" | "CAD" | "KYD" | "CLF" | "CLP" | "CNY" | "COP" | "COU" | "KMF" | "CDF" | "CRC" | "HRK" | "CUC" | "CUP" | "ANG" | "CZK" | "DKK" | "DJF" | "DOP" | "EGP" | "SVC" | "ERN" | "ETB" | "FKP" | "FJD" | "XAF" | "GMD" | "GEL" | "GHS" | "GIP" | "GTQ" | "GNF" | "GYD" | "HTG" | "HNL" | "HKD" | "HUF" | "ISK" | "IDR" | "XDR" | "IRR" | "IQD" | "ILS" | "JMD" | "JPY" | "JOD" | "KZT" | "KES" | "KPW" | "KRW" | "KWD" | "KGS" | "LAK" | "LBP" | "LSL" | "LRD" | "LYD" | "MOP" | "MGA" | "MWK" | "MYR" | "MVR" | "MRU" | "XUA" | "MXN" | "MXV" | "MDL" | "MNT" | "MZN" | "MMK" | "MUR" | "NAD" | "NPR" | "NIO" | "NGN" | "OMR" | "PKR" | "PAB" | "PGK" | "PYG" | "PEN" | "PHP" | "PLN" | "QAR" | "MKD" | "RON" | "RUB" | "RWF" | "WST" | "STN" | "SAR" | "RSD" | "SCR" | "SLL" | "SGD" | "XSU" | "SBD" | "SOS" | "ZAR" | "SSP" | "LKR" | "SDG" | "SRD" | "SZL" | "SEK" | "CHE" | "CHF" | "CHW" | "SYP" | "TWD" | "TJS" | "TZS" | "THB" | "XOF" | "NZD" | "TOP" | "TTD" | "TND" | "TRY" | "TMT" | "UGX" | "UAH" | "AED" | "GBP" | "USN" | "UYI" | "UYU" | "UZS" | "VUV" | "VEF" | "VND" | "XCD" | "XPF" | "MAD" | "YER" | "ZMW" | "ZWL"