zhutik/adyen-api-go

package adyen

import "math"

// Amount value/currency representation
type Amount struct {
    Value    float32 `json:"value"`
    Currency string  `json:"currency"`
}

var (
    // DefaultCurrencyDecimals - default currency decimals
    DefaultCurrencyDecimals uint = 2

    // CurrencyDecimals - https://docs.adyen.com/developers/currency-codes
    // currencies with 2 decimals stripped out
    CurrencyDecimals = map[string]uint{
        "BHD": 3,
        "CVE": 0,
        "DJF": 0,
        "GNF": 0,
        "IDR": 0,
        "JOD": 3,
        "JPY": 0,
        "KMF": 0,
        "KRW": 0,
        "KWD": 3,
        "LYD": 3,
        "OMR": 3,
        "PYG": 0,
        "RWF": 0,
        "TND": 3,
        "UGX": 0,
        "VND": 0,
        "VUV": 0,
        "XAF": 0,
        "XOF": 0,
        "XPF": 0,
    }
)

// NewAmount - creates Amount instance
//
// Automatically adjust decimal points for the float value
// Link - https://docs.adyen.com/developers/development-resources/currency-codes
func NewAmount(currency string, amount float32) *Amount {
    decimals, ok := CurrencyDecimals[currency]
    if !ok {
        decimals = DefaultCurrencyDecimals
    }

    if decimals == 0 {
        return &Amount{
            Currency: currency,
            Value:    amount,
        }
    }

    coef := float32(math.Pow(10, float64(decimals)))

    return &Amount{
        Currency: currency,
        Value:    float32(math.Round(float64(amount * coef))),
    }
}