xrpl-dev-portal/content/_code-samples/build-a-wallet/desktop-js/library/4_helpers.js

const xrpl = require("xrpl");

const prepareTxData = (transactions) => {
    return transactions.map(transaction => ({
        confirmed: transaction.tx.date,
        type: transaction.tx.TransactionType,
        from: transaction.tx.Account,
        to: transaction.tx.Destination,
        value: getDisplayableAmount(transaction.meta.delivered_amount),
        hash: transaction.tx.hash
    }))
}

const getDisplayableAmount = (rawAmount) => {
    if (rawAmount === 'unavailable') {
        // Special case for pre-2014 partial payments.
        return rawAmount
    } else if (typeof rawAmount === 'string') {
        // It's an XRP amount in drops. Convert to decimal.
        return xrpl.dropsToXrp(rawAmount) + ' XRP'
    } else {
        //It's a token (IOU) amount.
        return rawAmount.value + ' ' + rawAmount.currency
    }
}

module.exports = { prepareTxData }