@accounter/server/dist/server/src/modules/ledger/helpers/conversion-charge-ledger.helper.js

import { LedgerError } from './utils.helper.js';
export function getConversionBankRate(base, quote) {
    const baseRate = base.currencyRate ?? 0;
    const quoteRate = quote.currencyRate ?? 0;
    if (!baseRate && !quoteRate) {
        throw new LedgerError('Conversion records are missing currency rate');
    }
    if (!!baseRate && !!quoteRate && baseRate !== quoteRate) {
        throw new LedgerError('Conversion records have mismatching currency rates');
    }
    const bankRate = baseRate || quoteRate;
    return bankRate;
}
export function conversionFeeCalculator(base, quote, officialRate, defaultLocalCurrency, localCurrencyRate) {
    if (base.currency === quote.currency) {
        throw new LedgerError('Conversion records must have different currencies');
    }
    const eventRate = getConversionBankRate(base, quote);
    const baseAmount = base.currency === defaultLocalCurrency
        ? base.localCurrencyCreditAmount1
        : base.creditAmount1;
    const quoteAmount = quote.currency === defaultLocalCurrency
        ? quote.localCurrencyCreditAmount1
        : quote.creditAmount1;
    const baseAmountConvertedByEventRate = baseAmount / eventRate;
    const minimalPrecision = Math.max(baseAmount / 10_000_000, 0.005);
    if (baseAmountConvertedByEventRate - quoteAmount > minimalPrecision) {
        throw new LedgerError('Conversion records have mismatching amounts, taking the bank rate into account');
    }
    const baseAmountConvertedByOfficialRate = baseAmount / officialRate;
    const feeAmountByQuoteCurrency = quoteAmount - baseAmountConvertedByOfficialRate;
    if (quote.currency === defaultLocalCurrency) {
        return { localAmount: feeAmountByQuoteCurrency, currency: defaultLocalCurrency };
    }
    if (!localCurrencyRate) {
        if (base.currency === defaultLocalCurrency) {
            localCurrencyRate = 1 / officialRate;
        }
        else {
            throw new LedgerError('Conversion records are missing local currency rate');
        }
    }
    const feeAmountByLocalCurrency = feeAmountByQuoteCurrency * localCurrencyRate;
    return {
        foreignAmount: feeAmountByQuoteCurrency,
        localAmount: feeAmountByLocalCurrency,
        currency: quote.currency,
    };
}
//# sourceMappingURL=conversion-charge-ledger.helper.js.map