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Fix var name and use floor instead of .round(0, ROUND_DOWN)

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This commit is contained in:
Steve Klebanoff 2018-12-21 16:29:53 -08:00
parent c8c8219c05
commit 26977f6408
1 changed files with 7 additions and 9 deletions
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16
packages/asset-buyer/src/utils/buy_quote_calculator.ts
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@ -36,16 +36,14 @@ export const buyQuoteCalculator = {
if (remainingFillAmount.gt(constants.ZERO_AMOUNT)) {
// We needed the amount they requested to buy, plus the amount for slippage
const totalAmountRequested = assetBuyAmount.plus(slippageBufferAmount);
const amountUnableToFill = totalAmountRequested.minus(remainingFillAmount);
// multiplerNeededWithSlippage represents what we need to multiply the assetBuyAmount by
const amountAbleToFill = totalAmountRequested.minus(remainingFillAmount);
// multiplierNeededWithSlippage represents what we need to multiply the assetBuyAmount by
// in order to get the total amount needed considering slippage
// i.e. if slippagePercent was 0.2 (20%), multiplerNeededWithSlippage would be 1.2
const multiplerNeededWithSlippage = new BigNumber(1).plus(slippagePercentage);
// Given amountAvailableToFillConsideringSlippage * multiplerNeededWithSlippage = amountUnableToFill
// We divide amountUnableToFill by multiplerNeededWithSlippage to determine amountAvailableToFillConsideringSlippage
const amountAvailableToFillConsideringSlippage = amountUnableToFill
.div(multiplerNeededWithSlippage)
.round(0, BigNumber.ROUND_DOWN);
// i.e. if slippagePercent was 0.2 (20%), multiplierNeededWithSlippage would be 1.2
const multiplierNeededWithSlippage = new BigNumber(1).plus(slippagePercentage);
// Given amountAvailableToFillConsideringSlippage * multiplierNeededWithSlippage = amountAbleToFill
// We divide amountUnableToFill by multiplierNeededWithSlippage to determine amountAvailableToFillConsideringSlippage
const amountAvailableToFillConsideringSlippage = amountAbleToFill.div(multiplierNeededWithSlippage).floor();
throw new InsufficientAssetLiquidityError(amountAvailableToFillConsideringSlippage);
}