quickswap-smart-order-router
Version:
QuickSwap Smart Order Router
74 lines • 8.11 kB
JavaScript
import { Protocol, SwapRouter, Trade } from '@uniswap/router-sdk';
import { TradeType } from '@uniswap/sdk-core';
import { Route as V2RouteRaw } from '@uniswap/v2-sdk';
import { Route as V3RouteRaw } from '@uniswap/v3-sdk';
import _ from 'lodash';
import { CurrencyAmount, } from '..';
export function buildTrade(tokenInCurrency, tokenOutCurrency, tradeType, routeAmounts) {
const [v3RouteAmounts, v2RouteAmounts] = _.partition(routeAmounts, (routeAmount) => routeAmount.protocol == Protocol.V3);
const v3Routes = _.map(v3RouteAmounts, (routeAmount) => {
const { route, amount, quote } = routeAmount;
// The route, amount and quote are all in terms of wrapped tokens.
// When constructing the Trade object the inputAmount/outputAmount must
// use native currencies if specified by the user. This is so that the Trade knows to wrap/unwrap.
if (tradeType == TradeType.EXACT_INPUT) {
const amountCurrency = CurrencyAmount.fromFractionalAmount(tokenInCurrency, amount.numerator, amount.denominator);
const quoteCurrency = CurrencyAmount.fromFractionalAmount(tokenOutCurrency, quote.numerator, quote.denominator);
const routeRaw = new V3RouteRaw(route.pools, amountCurrency.currency, quoteCurrency.currency);
return {
routev3: routeRaw,
inputAmount: amountCurrency,
outputAmount: quoteCurrency,
};
}
else {
const quoteCurrency = CurrencyAmount.fromFractionalAmount(tokenInCurrency, quote.numerator, quote.denominator);
const amountCurrency = CurrencyAmount.fromFractionalAmount(tokenOutCurrency, amount.numerator, amount.denominator);
const routeCurrency = new V3RouteRaw(route.pools, quoteCurrency.currency, amountCurrency.currency);
return {
routev3: routeCurrency,
inputAmount: quoteCurrency,
outputAmount: amountCurrency,
};
}
});
const v2Routes = _.map(v2RouteAmounts, (routeAmount) => {
const { route, amount, quote } = routeAmount;
// The route, amount and quote are all in terms of wrapped tokens.
// When constructing the Trade object the inputAmount/outputAmount must
// use native currencies if specified by the user. This is so that the Trade knows to wrap/unwrap.
if (tradeType == TradeType.EXACT_INPUT) {
const amountCurrency = CurrencyAmount.fromFractionalAmount(tokenInCurrency, amount.numerator, amount.denominator);
const quoteCurrency = CurrencyAmount.fromFractionalAmount(tokenOutCurrency, quote.numerator, quote.denominator);
const routeV2SDK = new V2RouteRaw(route.pairs, amountCurrency.currency, quoteCurrency.currency);
return {
routev2: routeV2SDK,
inputAmount: amountCurrency,
outputAmount: quoteCurrency,
};
}
else {
const quoteCurrency = CurrencyAmount.fromFractionalAmount(tokenInCurrency, quote.numerator, quote.denominator);
const amountCurrency = CurrencyAmount.fromFractionalAmount(tokenOutCurrency, amount.numerator, amount.denominator);
const routeV2SDK = new V2RouteRaw(route.pairs, quoteCurrency.currency, amountCurrency.currency);
return {
routev2: routeV2SDK,
inputAmount: quoteCurrency,
outputAmount: amountCurrency,
};
}
});
//@ts-ignore
const trade = new Trade({ v2Routes, v3Routes, tradeType });
return trade;
}
export function buildSwapMethodParameters(trade, swapConfig) {
const { recipient, slippageTolerance, deadline, inputTokenPermit } = swapConfig;
return SwapRouter.swapCallParameters(trade, {
recipient,
slippageTolerance,
deadlineOrPreviousBlockhash: deadline,
inputTokenPermit,
});
}
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