@xspswap/smart-order-router
Version:
XSwap Protocol V3 Smart Order Router
290 lines • 30.4 kB
JavaScript
import { BigNumber } from '@ethersproject/bignumber';
import { Logger } from '@ethersproject/logger';
import { SwapRouter, Trade } from '@x-swap-protocol/router-sdk';
import { TradeType } from '@x-swap-protocol/sdk-core';
import { FeeAmount, Route } from '@x-swap-protocol/v3-sdk';
import _ from 'lodash';
import { USDT_XDC, } from '../../providers';
import { SWAP_ROUTER_02_ADDRESSES } from '../../util';
import { CurrencyAmount } from '../../util/amounts';
import { log } from '../../util/log';
import { routeToString } from '../../util/routes';
import { V3RouteWithValidQuote } from '../alpha-router';
import { V3Route } from '../router';
import { ADDITIONAL_BASES, BASES_TO_CHECK_TRADES_AGAINST, CUSTOM_BASES, } from './bases';
// Interface defaults to 2.
const MAX_HOPS = 2;
/**
* Replicates the router implemented in the V3 interface.
* Code is mostly a copy from https://github.com/Uniswap/uniswap-interface/blob/0190b5a408c13016c87e1030ffc59326c085f389/src/hooks/useBestV3Trade.ts#L22-L23
* with React/Redux hooks removed, and refactoring to allow re-use in other routers.
*/
export class LegacyRouter {
constructor({ chainId, multicall2Provider, poolProvider, quoteProvider, tokenProvider, }) {
this.chainId = chainId;
this.multicall2Provider = multicall2Provider;
this.poolProvider = poolProvider;
this.quoteProvider = quoteProvider;
this.tokenProvider = tokenProvider;
}
async route(amount, quoteCurrency, swapType, swapConfig, partialRoutingConfig) {
if (swapType == TradeType.EXACT_INPUT) {
return this.routeExactIn(amount.currency, quoteCurrency, amount, swapConfig, partialRoutingConfig);
}
return this.routeExactOut(quoteCurrency, amount.currency, amount, swapConfig, partialRoutingConfig);
}
async routeExactIn(currencyIn, currencyOut, amountIn, swapConfig, routingConfig) {
const tokenIn = currencyIn.wrapped;
const tokenOut = currencyOut.wrapped;
const routes = await this.getAllRoutes(tokenIn, tokenOut, routingConfig);
const routeQuote = await this.findBestRouteExactIn(amountIn, tokenOut, routes, routingConfig);
if (!routeQuote) {
return null;
}
const trade = this.buildTrade(currencyIn, currencyOut, TradeType.EXACT_INPUT, routeQuote);
return {
quote: routeQuote.quote,
quoteGasAdjusted: routeQuote.quote,
route: [routeQuote],
estimatedGasUsed: BigNumber.from(0),
estimatedGasUsedQuoteToken: CurrencyAmount.fromFractionalAmount(tokenOut, 0, 1),
estimatedGasUsedUSD: CurrencyAmount.fromFractionalAmount(USDT_XDC, 0, 1),
gasPriceWei: BigNumber.from(0),
trade,
methodParameters: swapConfig
? {
...this.buildMethodParameters(trade, swapConfig),
to: SWAP_ROUTER_02_ADDRESSES(this.chainId),
}
: undefined,
blockNumber: BigNumber.from(0),
};
}
async routeExactOut(currencyIn, currencyOut, amountOut, swapConfig, routingConfig) {
const tokenIn = currencyIn.wrapped;
const tokenOut = currencyOut.wrapped;
const routes = await this.getAllRoutes(tokenIn, tokenOut, routingConfig);
const routeQuote = await this.findBestRouteExactOut(amountOut, tokenIn, routes, routingConfig);
if (!routeQuote) {
return null;
}
const trade = this.buildTrade(currencyIn, currencyOut, TradeType.EXACT_OUTPUT, routeQuote);
return {
quote: routeQuote.quote,
quoteGasAdjusted: routeQuote.quote,
route: [routeQuote],
estimatedGasUsed: BigNumber.from(0),
estimatedGasUsedQuoteToken: CurrencyAmount.fromFractionalAmount(tokenIn, 0, 1),
estimatedGasUsedUSD: CurrencyAmount.fromFractionalAmount(USDT_XDC, 0, 1),
gasPriceWei: BigNumber.from(0),
trade,
methodParameters: swapConfig
? {
...this.buildMethodParameters(trade, swapConfig),
to: SWAP_ROUTER_02_ADDRESSES(this.chainId),
}
: undefined,
blockNumber: BigNumber.from(0),
};
}
async findBestRouteExactIn(amountIn, tokenOut, routes, routingConfig) {
const { routesWithQuotes: quotesRaw } = await this.quoteProvider.getQuotesManyExactIn([amountIn], routes, {
blockNumber: routingConfig === null || routingConfig === void 0 ? void 0 : routingConfig.blockNumber,
});
const quotes100Percent = _.map(quotesRaw, ([route, quotes]) => { var _a, _b; return `${routeToString(route)} : ${(_b = (_a = quotes[0]) === null || _a === void 0 ? void 0 : _a.quote) === null || _b === void 0 ? void 0 : _b.toString()}`; });
log.info({ quotes100Percent }, '100% Quotes');
const bestQuote = await this.getBestQuote(routes, quotesRaw, tokenOut, TradeType.EXACT_INPUT);
return bestQuote;
}
async findBestRouteExactOut(amountOut, tokenIn, routes, routingConfig) {
const { routesWithQuotes: quotesRaw } = await this.quoteProvider.getQuotesManyExactOut([amountOut], routes, {
blockNumber: routingConfig === null || routingConfig === void 0 ? void 0 : routingConfig.blockNumber,
});
const bestQuote = await this.getBestQuote(routes, quotesRaw, tokenIn, TradeType.EXACT_OUTPUT);
return bestQuote;
}
async getBestQuote(routes, quotesRaw, quoteToken, routeType) {
log.debug(`Got ${_.filter(quotesRaw, ([_, quotes]) => !!quotes[0]).length} valid quotes from ${routes.length} possible routes.`);
const routeQuotesRaw = [];
for (let i = 0; i < quotesRaw.length; i++) {
const [route, quotes] = quotesRaw[i];
const { quote, amount } = quotes[0];
if (!quote) {
Logger.globalLogger().debug(`No quote for ${routeToString(route)}`);
continue;
}
routeQuotesRaw.push({ route, quote, amount });
}
if (routeQuotesRaw.length == 0) {
return null;
}
routeQuotesRaw.sort((routeQuoteA, routeQuoteB) => {
if (routeType == TradeType.EXACT_INPUT) {
return routeQuoteA.quote.gt(routeQuoteB.quote) ? -1 : 1;
}
else {
return routeQuoteA.quote.lt(routeQuoteB.quote) ? -1 : 1;
}
});
const routeQuotes = _.map(routeQuotesRaw, ({ route, quote, amount }) => {
return new V3RouteWithValidQuote({
route,
rawQuote: quote,
amount,
percent: 100,
gasModel: {
estimateGasCost: () => ({
gasCostInToken: CurrencyAmount.fromRawAmount(quoteToken, 0),
gasCostInUSD: CurrencyAmount.fromRawAmount(USDT_XDC, 0),
gasEstimate: BigNumber.from(0),
}),
},
sqrtPriceX96AfterList: [],
initializedTicksCrossedList: [],
quoterGasEstimate: BigNumber.from(0),
tradeType: routeType,
quoteToken,
v3PoolProvider: this.poolProvider,
});
});
for (const rq of routeQuotes) {
log.debug(`Quote: ${rq.amount.toFixed(Math.min(rq.amount.currency.decimals, 2))} Route: ${routeToString(rq.route)}`);
}
return routeQuotes[0];
}
async getAllRoutes(tokenIn, tokenOut, routingConfig) {
const tokenPairs = await this.getAllPossiblePairings(tokenIn, tokenOut);
const poolAccessor = await this.poolProvider.getPools(tokenPairs, {
blockNumber: routingConfig === null || routingConfig === void 0 ? void 0 : routingConfig.blockNumber,
});
const pools = poolAccessor.getAllPools();
const routes = this.computeAllRoutes(tokenIn, tokenOut, pools, this.chainId, [], [], tokenIn, MAX_HOPS);
log.info({ routes: _.map(routes, routeToString) }, `Computed ${routes.length} possible routes.`);
return routes;
}
async getAllPossiblePairings(tokenIn, tokenOut) {
var _a, _b, _c, _d, _e;
const common = (_a = BASES_TO_CHECK_TRADES_AGAINST(this.tokenProvider)[this.chainId]) !== null && _a !== void 0 ? _a : [];
const additionalA = (_c = (_b = (await ADDITIONAL_BASES(this.tokenProvider))[this.chainId]) === null || _b === void 0 ? void 0 : _b[tokenIn.address]) !== null && _c !== void 0 ? _c : [];
const additionalB = (_e = (_d = (await ADDITIONAL_BASES(this.tokenProvider))[this.chainId]) === null || _d === void 0 ? void 0 : _d[tokenOut.address]) !== null && _e !== void 0 ? _e : [];
const bases = [...common, ...additionalA, ...additionalB];
const basePairs = _.flatMap(bases, (base) => bases.map((otherBase) => [base, otherBase]));
const customBases = (await CUSTOM_BASES(this.tokenProvider))[this.chainId];
const allPairs = _([
// the direct pair
[tokenIn, tokenOut],
// token A against all bases
...bases.map((base) => [tokenIn, base]),
// token B against all bases
...bases.map((base) => [tokenOut, base]),
// each base against all bases
...basePairs,
])
.filter((tokens) => Boolean(tokens[0] && tokens[1]))
.filter(([tokenA, tokenB]) => tokenA.address !== tokenB.address && !tokenA.equals(tokenB))
.filter(([tokenA, tokenB]) => {
const customBasesA = customBases === null || customBases === void 0 ? void 0 : customBases[tokenA.address];
const customBasesB = customBases === null || customBases === void 0 ? void 0 : customBases[tokenB.address];
if (!customBasesA && !customBasesB)
return true;
if (customBasesA && !customBasesA.find((base) => tokenB.equals(base)))
return false;
if (customBasesB && !customBasesB.find((base) => tokenA.equals(base)))
return false;
return true;
})
.flatMap(([tokenA, tokenB]) => {
return [
[tokenA, tokenB, FeeAmount.LOW],
[tokenA, tokenB, FeeAmount.MEDIUM],
[tokenA, tokenB, FeeAmount.HIGH],
];
})
.value();
return allPairs;
}
computeAllRoutes(tokenIn, tokenOut, pools, chainId, currentPath = [], allPaths = [], startTokenIn = tokenIn, maxHops = 2) {
for (const pool of pools) {
if (currentPath.indexOf(pool) !== -1 || !pool.involvesToken(tokenIn))
continue;
const outputToken = pool.token0.equals(tokenIn)
? pool.token1
: pool.token0;
if (outputToken.equals(tokenOut)) {
allPaths.push(new V3Route([...currentPath, pool], startTokenIn, tokenOut));
}
else if (maxHops > 1) {
this.computeAllRoutes(outputToken, tokenOut, pools, chainId, [...currentPath, pool], allPaths, startTokenIn, maxHops - 1);
}
}
return allPaths;
}
buildTrade(tokenInCurrency, tokenOutCurrency, tradeType, 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 necessary. 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 routeCurrency = new Route(route.pools, amountCurrency.currency, quoteCurrency.currency);
return new Trade({
v3Routes: [
{
routev3: routeCurrency,
inputAmount: amountCurrency,
outputAmount: quoteCurrency,
},
],
v2Routes: [],
tradeType: tradeType,
});
}
else {
const quoteCurrency = CurrencyAmount.fromFractionalAmount(tokenInCurrency, quote.numerator, quote.denominator);
const amountCurrency = CurrencyAmount.fromFractionalAmount(tokenOutCurrency, amount.numerator, amount.denominator);
const routeCurrency = new Route(route.pools, quoteCurrency.currency, amountCurrency.currency);
return new Trade({
v3Routes: [
{
routev3: routeCurrency,
inputAmount: quoteCurrency,
outputAmount: amountCurrency,
},
],
v2Routes: [],
tradeType: tradeType,
});
}
}
buildMethodParameters(trade, swapConfig) {
const { recipient, slippageTolerance, deadline } = swapConfig;
const methodParameters = SwapRouter.swapCallParameters(trade, {
recipient,
slippageTolerance,
deadlineOrPreviousBlockhash: deadline,
// ...(signatureData
// ? {
// inputTokenPermit:
// 'allowed' in signatureData
// ? {
// expiry: signatureData.deadline,
// nonce: signatureData.nonce,
// s: signatureData.s,
// r: signatureData.r,
// v: signatureData.v as any,
// }
// : {
// deadline: signatureData.deadline,
// amount: signatureData.amount,
// s: signatureData.s,
// r: signatureData.r,
// v: signatureData.v as any,
// },
// }
// : {}),
});
return methodParameters;
}
}
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