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chore: update big number package

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José Oliveira 2021-06-15 22:34:36 +01:00 • committed by Josh Harvey
parent 8aa18dd21c
commit ea44478b48
30 changed files with 186 additions and 144 deletions
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22
lib/commission-math.js
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@ -7,31 +7,31 @@ function truncateCrypto (cryptoAtoms, cryptoCode) {
if (cryptoAtoms.eq(0)) return cryptoAtoms
const scale = coinUtils.getCryptoCurrency(cryptoCode).displayScale
const scaleFactor = BN(10).pow(scale)
const scaleFactor = new BN(10).pow(scale)
return BN(cryptoAtoms).truncated().div(scaleFactor)
.round(DECIMAL_PLACES).times(scaleFactor)
return new BN(cryptoAtoms).integerValue(BN.ROUND_DOWN).div(scaleFactor)
.decimalPlaces(DECIMAL_PLACES).times(scaleFactor)
}
function fiatToCrypto (tx, rec, deviceId, config) {
const usableFiat = rec.fiat - rec.cashInFee
const commissions = configManager.getCommissions(tx.cryptoCode, deviceId, config)
const tickerRate = BN(tx.rawTickerPrice)
const tickerRate = new BN(tx.rawTickerPrice)
const discount = getDiscountRate(tx.discount, commissions[tx.direction])
const rate = tickerRate.mul(discount).round(5)
const rate = tickerRate.times(discount).decimalPlaces(5)
const unitScale = coinUtils.getCryptoCurrency(tx.cryptoCode).unitScale
const unitScaleFactor = BN(10).pow(unitScale)
const unitScaleFactor = new BN(10).pow(unitScale)
return truncateCrypto(BN(usableFiat).div(rate.div(unitScaleFactor)), tx.cryptoCode)
return truncateCrypto(new BN(usableFiat).div(rate.div(unitScaleFactor)), tx.cryptoCode)
}
function getDiscountRate (discount, commission) {
const bnDiscount = discount ? BN(discount) : BN(0)
const bnCommission = BN(commission)
const percentageDiscount = BN(1).sub(bnDiscount.div(100))
const bnDiscount = discount ? new BN(discount) : new BN(0)
const bnCommission = new BN(commission)
const percentageDiscount = new BN(1).minus(bnDiscount.div(100))
const percentageCommission = bnCommission.div(100)
return BN(1).add(percentageDiscount.mul(percentageCommission))
return new BN(1).plus(percentageDiscount.times(percentageCommission))
}
module.exports = {