@maxosllc/smart-order-router
Version:
BlockDAG Smart Order Router
422 lines • 44 kB
JavaScript
import { estimateL1Gas, estimateL1GasCost } from '@eth-optimism/sdk';
import { BigNumber } from '@ethersproject/bignumber';
import { Protocol } from '@uniswap/router-sdk';
import { ChainId } from '../../src/util/chains';
import { Percent, Token, TradeType } from '@uniswap/sdk-core';
import { UniversalRouterVersion } from '@uniswap/universal-router-sdk';
import brotli from 'brotli';
import JSBI from 'jsbi';
import _ from 'lodash';
import { getQuoteThroughNativePool, metric, MetricLoggerUnit, MixedRouteWithValidQuote, SwapType, usdGasTokensByChain, V2RouteWithValidQuote, V3RouteWithValidQuote, V4RouteWithValidQuote, } from '../routers';
import { CurrencyAmount, getApplicableV3FeeAmounts, log, WRAPPED_NATIVE_CURRENCY, } from '../util';
import { opStackChains } from './l2FeeChains';
import { buildSwapMethodParameters, buildTrade } from './methodParameters';
export async function getV2NativePool(token, poolProvider, providerConfig) {
const chainId = token.chainId;
const weth = WRAPPED_NATIVE_CURRENCY[chainId];
const poolAccessor = await poolProvider.getPools([[weth, token]], providerConfig);
const pool = poolAccessor.getPool(weth, token);
if (!pool || pool.reserve0.equalTo(0) || pool.reserve1.equalTo(0)) {
log.error({
weth,
token,
reserve0: pool === null || pool === void 0 ? void 0 : pool.reserve0.toExact(),
reserve1: pool === null || pool === void 0 ? void 0 : pool.reserve1.toExact(),
}, `Could not find a valid WETH V2 pool with ${token.symbol} for computing gas costs.`);
return null;
}
return pool;
}
export async function getHighestLiquidityV3NativePool(token, poolProvider, providerConfig) {
const nativeCurrency = WRAPPED_NATIVE_CURRENCY[token.chainId];
const feeAmounts = getApplicableV3FeeAmounts(token.chainId);
const nativePools = _(feeAmounts)
.map((feeAmount) => {
return [nativeCurrency, token, feeAmount];
})
.value();
const poolAccessor = await poolProvider.getPools(nativePools, providerConfig);
const pools = _(feeAmounts)
.map((feeAmount) => {
return poolAccessor.getPool(nativeCurrency, token, feeAmount);
})
.compact()
.value();
if (pools.length == 0) {
log.error({ pools }, `Could not find a ${nativeCurrency.symbol} pool with ${token.symbol} for computing gas costs.`);
return null;
}
const maxPool = pools.reduce((prev, current) => {
return JSBI.greaterThan(prev.liquidity, current.liquidity) ? prev : current;
});
return maxPool;
}
export async function getHighestLiquidityV3USDPool(chainId, poolProvider, providerConfig) {
const usdTokens = usdGasTokensByChain[chainId];
const wrappedCurrency = WRAPPED_NATIVE_CURRENCY[chainId];
if (!usdTokens) {
throw new Error(`Could not find a USD token for computing gas costs on ${chainId}`);
}
const feeAmounts = getApplicableV3FeeAmounts(chainId);
const usdPools = _(feeAmounts)
.flatMap((feeAmount) => {
return _.map(usdTokens, (usdToken) => [
wrappedCurrency,
usdToken,
feeAmount,
]);
})
.value();
const poolAccessor = await poolProvider.getPools(usdPools, providerConfig);
const pools = _(feeAmounts)
.flatMap((feeAmount) => {
const pools = [];
for (const usdToken of usdTokens) {
const pool = poolAccessor.getPool(wrappedCurrency, usdToken, feeAmount);
if (pool) {
pools.push(pool);
}
}
return pools;
})
.compact()
.value();
if (pools.length == 0) {
const message = `Could not find a USD/${wrappedCurrency.symbol} pool for computing gas costs.`;
log.error({ pools }, message);
throw new Error(message);
}
const maxPool = pools.reduce((prev, current) => {
return JSBI.greaterThan(prev.liquidity, current.liquidity) ? prev : current;
});
return maxPool;
}
export function getGasCostInNativeCurrency(nativeCurrency, gasCostInWei) {
// wrap fee to native currency
const costNativeCurrency = CurrencyAmount.fromRawAmount(nativeCurrency, gasCostInWei.toString());
return costNativeCurrency;
}
export function getArbitrumBytes(data) {
if (data == '')
return BigNumber.from(0);
const compressed = brotli.compress(Buffer.from(data.replace('0x', ''), 'hex'), {
mode: 0,
quality: 1,
lgwin: 22,
});
// TODO: This is a rough estimate of the compressed size
// Brotli 0 should be used, but this brotli library doesn't support it
// https://github.com/foliojs/brotli.js/issues/38
// There are other brotli libraries that do support it, but require async
// We workaround by using Brotli 1 with a 20% bump in size
return BigNumber.from(compressed.length).mul(120).div(100);
}
export function calculateArbitrumToL1FeeFromCalldata(calldata, gasData, chainId) {
const { perL2TxFee, perL1CalldataFee, perArbGasTotal } = gasData;
// calculates gas amounts based on bytes of calldata, use 0 as overhead.
const l1GasUsed = getL2ToL1GasUsed(calldata, chainId);
// multiply by the fee per calldata and add the flat l2 fee
const l1Fee = l1GasUsed.mul(perL1CalldataFee).add(perL2TxFee);
const gasUsedL1OnL2 = l1Fee.div(perArbGasTotal);
return [l1GasUsed, l1Fee, gasUsedL1OnL2];
}
export async function calculateOptimismToL1FeeFromCalldata(calldata, chainId, provider) {
const tx = {
data: calldata,
chainId: chainId,
type: 2, // sign the transaction as EIP-1559, otherwise it will fail at maxFeePerGas
};
const [l1GasUsed, l1GasCost] = await Promise.all([
estimateL1Gas(provider, tx),
estimateL1GasCost(provider, tx),
]);
return [l1GasUsed, l1GasCost];
}
export function getL2ToL1GasUsed(data, chainId) {
switch (chainId) {
case ChainId.ARBITRUM_ONE:
case ChainId.ARBITRUM_GOERLI: {
// calculates bytes of compressed calldata
const l1ByteUsed = getArbitrumBytes(data);
return l1ByteUsed.mul(16);
}
default:
return BigNumber.from(0);
}
}
export async function calculateGasUsed(chainId, route, simulatedGasUsed, v2PoolProvider, v3PoolProvider, provider, providerConfig) {
const quoteToken = route.quote.currency.wrapped;
const gasPriceWei = route.gasPriceWei;
// calculate L2 to L1 security fee if relevant
let l2toL1FeeInWei = BigNumber.from(0);
// Arbitrum charges L2 gas for L1 calldata posting costs.
// See https://github.com/Uniswap/smart-order-router/pull/464/files#r1441376802
if (opStackChains.includes(chainId)) {
l2toL1FeeInWei = (await calculateOptimismToL1FeeFromCalldata(route.methodParameters.calldata, chainId, provider))[1];
}
// add l2 to l1 fee and wrap fee to native currency
const gasCostInWei = gasPriceWei.mul(simulatedGasUsed).add(l2toL1FeeInWei);
const nativeCurrency = WRAPPED_NATIVE_CURRENCY[chainId];
const costNativeCurrency = getGasCostInNativeCurrency(nativeCurrency, gasCostInWei);
const usdPool = await getHighestLiquidityV3USDPool(chainId, v3PoolProvider, providerConfig);
/** ------ MARK: USD logic -------- */
const gasCostUSD = getQuoteThroughNativePool(chainId, costNativeCurrency, usdPool);
/** ------ MARK: Conditional logic run if gasToken is specified -------- */
let gasCostInTermsOfGasToken = undefined;
if (providerConfig === null || providerConfig === void 0 ? void 0 : providerConfig.gasToken) {
if (providerConfig.gasToken.equals(nativeCurrency)) {
gasCostInTermsOfGasToken = costNativeCurrency;
}
else {
const nativeAndSpecifiedGasTokenPool = await getHighestLiquidityV3NativePool(providerConfig.gasToken, v3PoolProvider, providerConfig);
if (nativeAndSpecifiedGasTokenPool) {
gasCostInTermsOfGasToken = getQuoteThroughNativePool(chainId, costNativeCurrency, nativeAndSpecifiedGasTokenPool);
}
else {
log.info(`Could not find a V3 pool for gas token ${providerConfig.gasToken.symbol}`);
}
}
}
/** ------ MARK: Main gas logic in terms of quote token -------- */
let gasCostQuoteToken = undefined;
// shortcut if quote token is native currency
if (quoteToken.equals(nativeCurrency)) {
gasCostQuoteToken = costNativeCurrency;
}
// get fee in terms of quote token
else {
const nativePools = await Promise.all([
getHighestLiquidityV3NativePool(quoteToken, v3PoolProvider, providerConfig),
getV2NativePool(quoteToken, v2PoolProvider, providerConfig),
]);
const nativePool = nativePools.find((pool) => pool !== null);
if (!nativePool) {
log.info('Could not find any V2 or V3 pools to convert the cost into the quote token');
gasCostQuoteToken = CurrencyAmount.fromRawAmount(quoteToken, 0);
}
else {
gasCostQuoteToken = getQuoteThroughNativePool(chainId, costNativeCurrency, nativePool);
}
}
// Adjust quote for gas fees
let quoteGasAdjusted;
if (route.trade.tradeType == TradeType.EXACT_OUTPUT) {
// Exact output - need more of tokenIn to get the desired amount of tokenOut
quoteGasAdjusted = route.quote.add(gasCostQuoteToken);
}
else {
// Exact input - can get less of tokenOut due to fees
quoteGasAdjusted = route.quote.subtract(gasCostQuoteToken);
}
return {
estimatedGasUsedUSD: gasCostUSD,
estimatedGasUsedQuoteToken: gasCostQuoteToken,
estimatedGasUsedGasToken: gasCostInTermsOfGasToken,
quoteGasAdjusted: quoteGasAdjusted,
};
}
export function initSwapRouteFromExisting(swapRoute, v2PoolProvider, v3PoolProvider, v4PoolProvider, portionProvider, quoteGasAdjusted, estimatedGasUsed, estimatedGasUsedQuoteToken, estimatedGasUsedUSD, swapOptions, estimatedGasUsedGasToken, providerConfig) {
const currencyIn = swapRoute.trade.inputAmount.currency;
const currencyOut = swapRoute.trade.outputAmount.currency;
const tradeType = swapRoute.trade.tradeType.valueOf()
? TradeType.EXACT_OUTPUT
: TradeType.EXACT_INPUT;
const routesWithValidQuote = swapRoute.route.map((route) => {
switch (route.protocol) {
case Protocol.V4:
return new V4RouteWithValidQuote({
amount: CurrencyAmount.fromFractionalAmount(route.amount.currency, route.amount.numerator, route.amount.denominator),
rawQuote: BigNumber.from(route.rawQuote),
sqrtPriceX96AfterList: route.sqrtPriceX96AfterList.map((num) => BigNumber.from(num)),
initializedTicksCrossedList: [...route.initializedTicksCrossedList],
quoterGasEstimate: BigNumber.from(route.gasEstimate),
percent: route.percent,
route: route.route,
gasModel: route.gasModel,
quoteToken: new Token(currencyIn.chainId, route.quoteToken.address, route.quoteToken.decimals, route.quoteToken.symbol, route.quoteToken.name),
tradeType: tradeType,
v4PoolProvider: v4PoolProvider,
});
case Protocol.V3:
return new V3RouteWithValidQuote({
amount: CurrencyAmount.fromFractionalAmount(route.amount.currency, route.amount.numerator, route.amount.denominator),
rawQuote: BigNumber.from(route.rawQuote),
sqrtPriceX96AfterList: route.sqrtPriceX96AfterList.map((num) => BigNumber.from(num)),
initializedTicksCrossedList: [...route.initializedTicksCrossedList],
quoterGasEstimate: BigNumber.from(route.gasEstimate),
percent: route.percent,
route: route.route,
gasModel: route.gasModel,
quoteToken: new Token(currencyIn.chainId, route.quoteToken.address, route.quoteToken.decimals, route.quoteToken.symbol, route.quoteToken.name),
tradeType: tradeType,
v3PoolProvider: v3PoolProvider,
});
case Protocol.V2:
return new V2RouteWithValidQuote({
amount: CurrencyAmount.fromFractionalAmount(route.amount.currency, route.amount.numerator, route.amount.denominator),
rawQuote: BigNumber.from(route.rawQuote),
percent: route.percent,
route: route.route,
gasModel: route.gasModel,
quoteToken: new Token(currencyIn.chainId, route.quoteToken.address, route.quoteToken.decimals, route.quoteToken.symbol, route.quoteToken.name),
tradeType: tradeType,
v2PoolProvider: v2PoolProvider,
});
case Protocol.MIXED:
return new MixedRouteWithValidQuote({
amount: CurrencyAmount.fromFractionalAmount(route.amount.currency, route.amount.numerator, route.amount.denominator),
rawQuote: BigNumber.from(route.rawQuote),
sqrtPriceX96AfterList: route.sqrtPriceX96AfterList.map((num) => BigNumber.from(num)),
initializedTicksCrossedList: [...route.initializedTicksCrossedList],
quoterGasEstimate: BigNumber.from(route.gasEstimate),
percent: route.percent,
route: route.route,
mixedRouteGasModel: route.gasModel,
v2PoolProvider,
quoteToken: new Token(currencyIn.chainId, route.quoteToken.address, route.quoteToken.decimals, route.quoteToken.symbol, route.quoteToken.name),
tradeType: tradeType,
v3PoolProvider: v3PoolProvider,
v4PoolProvider: v4PoolProvider,
});
default:
throw new Error('Invalid protocol');
}
});
const trade = buildTrade(currencyIn, currencyOut, tradeType, routesWithValidQuote);
const quoteGasAndPortionAdjusted = swapRoute.portionAmount
? portionProvider.getQuoteGasAndPortionAdjusted(swapRoute.trade.tradeType, quoteGasAdjusted, swapRoute.portionAmount)
: undefined;
const routesWithValidQuotePortionAdjusted = portionProvider.getRouteWithQuotePortionAdjusted(swapRoute.trade.tradeType, routesWithValidQuote, swapOptions, providerConfig);
return {
quote: swapRoute.quote,
quoteGasAdjusted,
quoteGasAndPortionAdjusted,
estimatedGasUsed,
estimatedGasUsedQuoteToken,
estimatedGasUsedGasToken,
estimatedGasUsedUSD,
gasPriceWei: BigNumber.from(swapRoute.gasPriceWei),
trade,
route: routesWithValidQuotePortionAdjusted,
blockNumber: BigNumber.from(swapRoute.blockNumber),
methodParameters: swapRoute.methodParameters
? {
calldata: swapRoute.methodParameters.calldata,
value: swapRoute.methodParameters.value,
to: swapRoute.methodParameters.to,
}
: undefined,
simulationStatus: swapRoute.simulationStatus,
portionAmount: swapRoute.portionAmount,
hitsCachedRoute: swapRoute.hitsCachedRoute,
};
}
export const calculateL1GasFeesHelper = async (route, chainId, usdPool, quoteToken, nativePool, provider, l2GasData, providerConfig) => {
var _a;
const swapOptions = {
type: SwapType.UNIVERSAL_ROUTER,
version: (_a = providerConfig === null || providerConfig === void 0 ? void 0 : providerConfig.universalRouterVersion) !== null && _a !== void 0 ? _a : UniversalRouterVersion.V1_2,
recipient: '0x0000000000000000000000000000000000000001',
deadlineOrPreviousBlockhash: 100,
slippageTolerance: new Percent(5, 10000),
};
let mainnetGasUsed = BigNumber.from(0);
let mainnetFeeInWei = BigNumber.from(0);
let gasUsedL1OnL2 = BigNumber.from(0);
if (opStackChains.includes(chainId)) {
[mainnetGasUsed, mainnetFeeInWei] = await calculateOptimismToL1SecurityFee(route, swapOptions, chainId, provider);
}
else if (chainId == ChainId.ARBITRUM_ONE ||
chainId == ChainId.ARBITRUM_GOERLI) {
[mainnetGasUsed, mainnetFeeInWei, gasUsedL1OnL2] =
calculateArbitrumToL1SecurityFee(route, swapOptions, l2GasData, chainId);
}
// wrap fee to native currency
const nativeCurrency = WRAPPED_NATIVE_CURRENCY[chainId];
const costNativeCurrency = CurrencyAmount.fromRawAmount(nativeCurrency, mainnetFeeInWei.toString());
// convert fee into usd
const gasCostL1USD = getQuoteThroughNativePool(chainId, costNativeCurrency, usdPool);
let gasCostL1QuoteToken = costNativeCurrency;
// if the inputted token is not in the native currency, quote a native/quote token pool to get the gas cost in terms of the quote token
if (!quoteToken.equals(nativeCurrency)) {
if (!nativePool) {
log.info('Could not find a pool to convert the cost into the quote token');
gasCostL1QuoteToken = CurrencyAmount.fromRawAmount(quoteToken, 0);
}
else {
const nativeTokenPrice = nativePool.token0.address == nativeCurrency.address
? nativePool.token0Price
: nativePool.token1Price;
gasCostL1QuoteToken = nativeTokenPrice.quote(costNativeCurrency);
}
}
// gasUsedL1 is the gas units used calculated from the bytes of the calldata
// gasCostL1USD and gasCostL1QuoteToken is the cost of gas in each of those tokens
return {
gasUsedL1: mainnetGasUsed,
gasUsedL1OnL2,
gasCostL1USD,
gasCostL1QuoteToken,
};
/**
* To avoid having a call to optimism's L1 security fee contract for every route and amount combination,
* we replicate the gas cost accounting here.
*/
async function calculateOptimismToL1SecurityFee(routes, swapConfig, chainId, provider) {
const route = routes[0];
const amountToken = route.tradeType == TradeType.EXACT_INPUT
? route.amount.currency
: route.quote.currency;
const outputToken = route.tradeType == TradeType.EXACT_INPUT
? route.quote.currency
: route.amount.currency;
// build trade for swap calldata
const trade = buildTrade(amountToken, outputToken, route.tradeType, routes);
const data = buildSwapMethodParameters(trade, swapConfig, ChainId.OPTIMISM).calldata;
const [l1GasUsed, l1GasCost] = await calculateOptimismToL1FeeFromCalldata(data, chainId, provider);
return [l1GasUsed, l1GasCost];
}
function calculateArbitrumToL1SecurityFee(routes, swapConfig, gasData, chainId) {
const route = routes[0];
const amountToken = route.tradeType == TradeType.EXACT_INPUT
? route.amount.currency
: route.quote.currency;
const outputToken = route.tradeType == TradeType.EXACT_INPUT
? route.quote.currency
: route.amount.currency;
// build trade for swap calldata
const trade = buildTrade(amountToken, outputToken, route.tradeType, routes);
const data = buildSwapMethodParameters(trade, swapConfig, ChainId.ARBITRUM_ONE).calldata;
return calculateArbitrumToL1FeeFromCalldata(data, gasData, chainId);
}
};
// Logs metrics about the diff between original estimatedGasUsed based on heuristics and the simulated gas used.
// This will help us track the quality of our gas estimation quality per chain.
export const logGasEstimationVsSimulationMetrics = (route, simulationGasUsed, chainId) => {
try {
// Log the diff between original estimatedGasUsed and the simulated gas used
const estimatedGasUsed = route.estimatedGasUsed.toNumber();
const simulatedGasUsed = simulationGasUsed.toNumber();
const diff = estimatedGasUsed - simulatedGasUsed;
const absDiff = Math.abs(estimatedGasUsed - simulatedGasUsed);
const misEstimatePercent = (diff / estimatedGasUsed) * 100;
const misEstimateAbsPercent = (absDiff / estimatedGasUsed) * 100;
log.info({
estimatedGasUsed: estimatedGasUsed,
simulatedGasUsed: simulatedGasUsed,
absDiff: absDiff,
diff: diff,
}, 'Gas used diff between estimatedGasUsed and simulatedGasUsed');
log.info({
misEstimateAbsPercent: misEstimateAbsPercent,
}, 'Gas used mis-estimate percent');
metric.putMetric(`TenderlySimulationGasUsed_AbsDiff_Chain_${chainId}`, absDiff, MetricLoggerUnit.Count);
metric.putMetric(`TenderlySimulationGasUsed_MisEstimateAbsPercent_Chain_${chainId}`, misEstimateAbsPercent, MetricLoggerUnit.Count);
const label = diff >= 0 ? 'OverEstimate' : 'UnderEstimate';
metric.putMetric(`TenderlySimulationGasUsed_${label}Percent_Chain_${chainId}`, misEstimatePercent, MetricLoggerUnit.Count);
}
catch (err) {
log.error({ err: err }, 'Failed to log diff between original estimatedGasUsed and the simulated gas used');
}
};
//# 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