@sky-mavis/smart-order-router
Version:
Ronin Swap Smart Order Router
158 lines • 17.1 kB
JavaScript
import { BigNumber } from '@ethersproject/bignumber';
import { Price } from '@uniswap/sdk-core';
import _ from 'lodash';
import { WRAPPED_NATIVE_CURRENCY } from '../../../..';
import { CurrencyAmount } from '../../../../util/amounts';
import { calculateL1GasFeesHelper } from '../../../../util/gas-factory-helpers';
import { log } from '../../../../util/log';
import { getQuoteThroughNativePool, IOnChainGasModelFactory, } from '../gas-model';
import { BASE_SWAP_COST, COST_PER_HOP, COST_PER_INIT_TICK, COST_PER_UNINIT_TICK, SINGLE_HOP_OVERHEAD, TOKEN_OVERHEAD, } from './gas-costs';
/**
* Computes a gas estimate for a V3 swap using heuristics.
* Considers number of hops in the route, number of ticks crossed
* and the typical base cost for a swap.
*
* We get the number of ticks crossed in a swap from the QuoterV2
* contract.
*
* We compute gas estimates off-chain because
* 1/ Calling eth_estimateGas for a swaps requires the caller to have
* the full balance token being swapped, and approvals.
* 2/ Tracking gas used using a wrapper contract is not accurate with Multicall
* due to EIP-2929. We would have to make a request for every swap we wanted to estimate.
* 3/ For V2 we simulate all our swaps off-chain so have no way to track gas used.
*
* @export
* @class V3HeuristicGasModelFactory
*/
export class V3HeuristicGasModelFactory extends IOnChainGasModelFactory {
async buildGasModel({ chainId, gasPriceWei, pools, amountToken, quoteToken, providerConfig, }) {
const usdPool = pools.usdPool;
const calculateL1GasFees = async () => {
return await calculateL1GasFeesHelper(chainId, usdPool, quoteToken, pools.nativeAndQuoteTokenV3Pool);
};
const nativeCurrency = WRAPPED_NATIVE_CURRENCY[chainId];
let nativeAmountPool = null;
if (!amountToken.equals(nativeCurrency)) {
nativeAmountPool = pools.nativeAndAmountTokenV3Pool;
}
const usdToken = usdPool.token0.equals(nativeCurrency) ? usdPool.token1 : usdPool.token0;
const estimateGasCost = (routeWithValidQuote) => {
var _a;
const { totalGasCostNativeCurrency, baseGasUse } = this.estimateGas(routeWithValidQuote, gasPriceWei, chainId, providerConfig);
/** ------ MARK: USD logic -------- */
const gasCostInTermsOfUSD = getQuoteThroughNativePool(chainId, totalGasCostNativeCurrency, usdPool);
/** ------ MARK: Conditional logic run if gasToken is specified -------- */
const nativeAndSpecifiedGasTokenPool = pools.nativeAndSpecifiedGasTokenV3Pool;
let gasCostInTermsOfGasToken = undefined;
// we don't want to fetch the gasToken pool if the gasToken is the native currency
if (nativeAndSpecifiedGasTokenPool) {
gasCostInTermsOfGasToken = getQuoteThroughNativePool(chainId, totalGasCostNativeCurrency, nativeAndSpecifiedGasTokenPool);
}
// if the gasToken is the native currency, we can just use the totalGasCostNativeCurrency
else if ((_a = providerConfig === null || providerConfig === void 0 ? void 0 : providerConfig.gasToken) === null || _a === void 0 ? void 0 : _a.equals(nativeCurrency)) {
gasCostInTermsOfGasToken = totalGasCostNativeCurrency;
}
/** ------ MARK: return early if quoteToken is wrapped native currency ------- */
if (quoteToken.equals(nativeCurrency)) {
return {
gasEstimate: baseGasUse,
gasCostInToken: totalGasCostNativeCurrency,
gasCostInUSD: gasCostInTermsOfUSD,
gasCostInGasToken: gasCostInTermsOfGasToken,
};
}
/** ------ MARK: Main gas logic in terms of quote token -------- */
// Since the quote token is not in the native currency, we convert the gas cost to be in terms of the quote token.
// We do this by getting the highest liquidity <quoteToken>/<nativeCurrency> pool. eg. <quoteToken>/ETH pool.
const nativeAndQuoteTokenPool = pools.nativeAndQuoteTokenV3Pool;
let gasCostInTermsOfQuoteToken = null;
if (nativeAndQuoteTokenPool) {
gasCostInTermsOfQuoteToken = getQuoteThroughNativePool(chainId, totalGasCostNativeCurrency, nativeAndQuoteTokenPool);
}
// We may have a nativeAmountPool, but not a nativePool
else {
log.info(`Unable to find ${nativeCurrency.symbol} pool with the quote token, ${quoteToken.symbol} to produce gas adjusted costs. Using amountToken to calculate gas costs.`);
}
/** ------ MARK: (V3 ONLY) Logic for calculating synthetic gas cost in terms of amount token -------- */
// TODO: evaluate effectiveness and potentially refactor
// Highest liquidity pool for the non quote token / ETH
// A pool with the non quote token / ETH should not be required and errors should be handled separately
if (nativeAmountPool) {
// get current execution price (amountToken / quoteToken)
const executionPrice = new Price(routeWithValidQuote.amount.currency, routeWithValidQuote.quote.currency, routeWithValidQuote.amount.quotient, routeWithValidQuote.quote.quotient);
const inputIsToken0 = nativeAmountPool.token0.address == nativeCurrency.address;
// ratio of input / native
const nativeAndAmountTokenPrice = inputIsToken0 ? nativeAmountPool.token0Price : nativeAmountPool.token1Price;
const gasCostInTermsOfAmountToken = nativeAndAmountTokenPrice.quote(totalGasCostNativeCurrency);
// Convert gasCostInTermsOfAmountToken to quote token using execution price
const syntheticGasCostInTermsOfQuoteToken = executionPrice.quote(gasCostInTermsOfAmountToken);
// Note that the syntheticGasCost being lessThan the original quoted value is not always strictly better
// e.g. the scenario where the amountToken/ETH pool is very illiquid as well and returns an extremely small number
// however, it is better to have the gasEstimation be almost 0 than almost infinity, as the user will still receive a quote
if (gasCostInTermsOfQuoteToken === null ||
syntheticGasCostInTermsOfQuoteToken.lessThan(gasCostInTermsOfQuoteToken.asFraction)) {
log.info({
nativeAndAmountTokenPrice: nativeAndAmountTokenPrice.toSignificant(6),
gasCostInTermsOfQuoteToken: gasCostInTermsOfQuoteToken ? gasCostInTermsOfQuoteToken.toExact() : 0,
gasCostInTermsOfAmountToken: gasCostInTermsOfAmountToken.toExact(),
executionPrice: executionPrice.toSignificant(6),
syntheticGasCostInTermsOfQuoteToken: syntheticGasCostInTermsOfQuoteToken.toSignificant(6),
}, 'New gasCostInTermsOfQuoteToken calculated with synthetic quote token price is less than original');
gasCostInTermsOfQuoteToken = syntheticGasCostInTermsOfQuoteToken;
}
}
// If gasCostInTermsOfQuoteToken is null, both attempts to calculate gasCostInTermsOfQuoteToken failed (nativePool and amountNativePool)
if (gasCostInTermsOfQuoteToken === null) {
log.info(`Unable to find ${nativeCurrency.symbol} pool with the quote token, ${quoteToken.symbol}, or amount Token, ${amountToken.symbol} to produce gas adjusted costs. Route will not account for gas.`);
return {
gasEstimate: baseGasUse,
gasCostInToken: CurrencyAmount.fromRawAmount(quoteToken, 0),
gasCostInUSD: CurrencyAmount.fromRawAmount(usdToken, 0),
};
}
return {
gasEstimate: baseGasUse,
gasCostInToken: gasCostInTermsOfQuoteToken,
gasCostInUSD: gasCostInTermsOfUSD,
gasCostInGasToken: gasCostInTermsOfGasToken,
};
};
return {
estimateGasCost: estimateGasCost.bind(this),
calculateL1GasFees,
};
}
estimateGas(routeWithValidQuote, gasPriceWei, chainId, providerConfig) {
var _a;
const totalInitializedTicksCrossed = BigNumber.from(Math.max(1, _.sum(routeWithValidQuote.initializedTicksCrossedList)));
const totalHops = BigNumber.from(routeWithValidQuote.route.pools.length);
let hopsGasUse = COST_PER_HOP.mul(totalHops);
// We have observed that this algorithm tends to underestimate single hop swaps.
// We add a buffer in the case of a single hop swap.
if (totalHops.eq(1)) {
hopsGasUse = hopsGasUse.add(SINGLE_HOP_OVERHEAD);
}
// Some tokens have extremely expensive transferFrom functions, which causes
// us to underestimate them by a large amount. For known tokens, we apply an
// adjustment.
const tokenOverhead = TOKEN_OVERHEAD;
const tickGasUse = COST_PER_INIT_TICK.mul(totalInitializedTicksCrossed);
const uninitializedTickGasUse = COST_PER_UNINIT_TICK.mul(0);
// base estimate gas used based on chainId estimates for hops and ticks gas useage
const baseGasUse = BASE_SWAP_COST.add(hopsGasUse)
.add(tokenOverhead)
.add(tickGasUse)
.add(uninitializedTickGasUse)
.add((_a = providerConfig === null || providerConfig === void 0 ? void 0 : providerConfig.additionalGasOverhead) !== null && _a !== void 0 ? _a : BigNumber.from(0));
const baseGasCostWei = gasPriceWei.mul(baseGasUse);
const wrappedCurrency = WRAPPED_NATIVE_CURRENCY[chainId];
const totalGasCostNativeCurrency = CurrencyAmount.fromRawAmount(wrappedCurrency, baseGasCostWei.toString());
return {
totalGasCostNativeCurrency,
totalInitializedTicksCrossed,
baseGasUse,
};
}
}
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