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move the compute price impact function out to a utility file

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This commit is contained in:
Moody Salem 2021-05-04 17:55:51 -05:00
parent 28c7cfa1f1
commit ab5114c5f5
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GPG Key ID: 8CB5CD10385138DB
2 changed files with 19 additions and 16 deletions
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17
src/components/swap/AdvancedSwapDetails.tsx
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@ -1,10 +1,10 @@
import { CurrencyAmount, Percent, Price } from '@uniswap/sdk-core'
import { Trade as V2Trade } from '@uniswap/v2-sdk' import { Trade as V2Trade } from '@uniswap/v2-sdk'
import { Trade as V3Trade } from '@uniswap/v3-sdk' import { Trade as V3Trade } from '@uniswap/v3-sdk'
import React, { useContext } from 'react' import React, { useContext } from 'react'
import { ThemeContext } from 'styled-components' import { ThemeContext } from 'styled-components'
import { useUserSlippageTolerance } from '../../state/user/hooks' import { useUserSlippageTolerance } from '../../state/user/hooks'
import { TYPE } from '../../theme' import { TYPE } from '../../theme'
import { computePriceImpactWithMaximumSlippage } from '../../utils/computePriceImpactWithMaximumSlippage'
import { computeRealizedLPFeeAmount } from '../../utils/prices' import { computeRealizedLPFeeAmount } from '../../utils/prices'
import { AutoColumn } from '../Column' import { AutoColumn } from '../Column'
import { RowBetween, RowFixed } from '../Row' import { RowBetween, RowFixed } from '../Row'
@ -15,21 +15,6 @@ export interface AdvancedSwapDetailsProps {
trade?: V2Trade | V3Trade trade?: V2Trade | V3Trade
} }
function computePriceImpact(midPrice: Price, inputAmount: CurrencyAmount, outputAmount: CurrencyAmount): Percent {
const exactQuote = midPrice.raw.multiply(inputAmount.raw)
// calculate slippage := (exactQuote - outputAmount) / exactQuote
const slippage = exactQuote.subtract(outputAmount.raw).divide(exactQuote)
return new Percent(slippage.numerator, slippage.denominator)
}
function computePriceImpactWithMaximumSlippage(trade: V2Trade | V3Trade, allowedSlippage: Percent): Percent {
return computePriceImpact(
trade.route.midPrice,
trade.maximumAmountIn(allowedSlippage),
trade.minimumAmountOut(allowedSlippage)
)
}
export function AdvancedSwapDetails({ trade }: AdvancedSwapDetailsProps) { export function AdvancedSwapDetails({ trade }: AdvancedSwapDetailsProps) {
const theme = useContext(ThemeContext) const theme = useContext(ThemeContext)

18
src/utils/computePriceImpactWithMaximumSlippage.tsx Normal file
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@ -0,0 +1,18 @@
import { CurrencyAmount, Percent, Price } from '@uniswap/sdk-core'
import { Trade as V2Trade } from '@uniswap/v2-sdk'
import { Trade as V3Trade } from '@uniswap/v3-sdk'
function computePriceImpact(midPrice: Price, inputAmount: CurrencyAmount, outputAmount: CurrencyAmount): Percent {
const exactQuote = midPrice.raw.multiply(inputAmount.raw)
// calculate slippage := (exactQuote - outputAmount) / exactQuote
const slippage = exactQuote.subtract(outputAmount.raw).divide(exactQuote)
return new Percent(slippage.numerator, slippage.denominator)
}
export function computePriceImpactWithMaximumSlippage(trade: V2Trade | V3Trade, allowedSlippage: Percent): Percent {
return computePriceImpact(
trade.route.midPrice,
trade.maximumAmountIn(allowedSlippage),
trade.minimumAmountOut(allowedSlippage)
)
}