mirror of
https://github.com/kremalicious/metamask-extension.git
synced 2024-11-23 02:10:12 +01:00
7ca9383785
* Fix swaps controller: update provider after networkIdStore state update * Listen for changes on networkController.store, instead of networkController.networkIdStore, in the swaps controller * Fix unit tests
1029 lines
33 KiB
JavaScript
1029 lines
33 KiB
JavaScript
import { Web3Provider } from '@ethersproject/providers';
|
|
import { Contract } from '@ethersproject/contracts';
|
|
import log from 'loglevel';
|
|
import BigNumber from 'bignumber.js';
|
|
import { ObservableStore } from '@metamask/obs-store';
|
|
import { mapValues, cloneDeep } from 'lodash';
|
|
import abi from 'human-standard-token-abi';
|
|
import {
|
|
decGWEIToHexWEI,
|
|
sumHexes,
|
|
} from '../../../shared/modules/conversion.utils';
|
|
import {
|
|
DEFAULT_ERC20_APPROVE_GAS,
|
|
QUOTES_EXPIRED_ERROR,
|
|
QUOTES_NOT_AVAILABLE_ERROR,
|
|
SWAPS_FETCH_ORDER_CONFLICT,
|
|
SWAPS_CHAINID_CONTRACT_ADDRESS_MAP,
|
|
} from '../../../shared/constants/swaps';
|
|
import { GasEstimateTypes } from '../../../shared/constants/gas';
|
|
import { CHAIN_IDS, NetworkStatus } from '../../../shared/constants/network';
|
|
import {
|
|
FALLBACK_SMART_TRANSACTIONS_REFRESH_TIME,
|
|
FALLBACK_SMART_TRANSACTIONS_DEADLINE,
|
|
FALLBACK_SMART_TRANSACTIONS_MAX_FEE_MULTIPLIER,
|
|
} from '../../../shared/constants/smartTransactions';
|
|
|
|
import { isSwapsDefaultTokenAddress } from '../../../shared/modules/swaps.utils';
|
|
|
|
import {
|
|
fetchTradesInfo as defaultFetchTradesInfo,
|
|
getBaseApi,
|
|
} from '../../../shared/lib/swaps-utils';
|
|
import fetchWithCache from '../../../shared/lib/fetch-with-cache';
|
|
import { MINUTE, SECOND } from '../../../shared/constants/time';
|
|
import { isEqualCaseInsensitive } from '../../../shared/modules/string-utils';
|
|
import {
|
|
calcGasTotal,
|
|
calcTokenAmount,
|
|
} from '../../../shared/lib/transactions-controller-utils';
|
|
import fetchEstimatedL1Fee from '../../../ui/helpers/utils/optimism/fetchEstimatedL1Fee';
|
|
|
|
import { Numeric } from '../../../shared/modules/Numeric';
|
|
import { EtherDenomination } from '../../../shared/constants/common';
|
|
|
|
// The MAX_GAS_LIMIT is a number that is higher than the maximum gas costs we have observed on any aggregator
|
|
const MAX_GAS_LIMIT = 2500000;
|
|
|
|
// To ensure that our serves are not spammed if MetaMask is left idle, we limit the number of fetches for quotes that are made on timed intervals.
|
|
// 3 seems to be an appropriate balance of giving users the time they need when MetaMask is not left idle, and turning polling off when it is.
|
|
const POLL_COUNT_LIMIT = 3;
|
|
|
|
// If for any reason the MetaSwap API fails to provide a refresh time,
|
|
// provide a reasonable fallback to avoid further errors
|
|
const FALLBACK_QUOTE_REFRESH_TIME = MINUTE;
|
|
|
|
function calculateGasEstimateWithRefund(
|
|
maxGas = MAX_GAS_LIMIT,
|
|
estimatedRefund = 0,
|
|
estimatedGas = 0,
|
|
) {
|
|
const maxGasMinusRefund = new BigNumber(maxGas, 10).minus(
|
|
estimatedRefund,
|
|
10,
|
|
);
|
|
const isMaxGasMinusRefundNegative = maxGasMinusRefund.lt(0);
|
|
|
|
const gasEstimateWithRefund =
|
|
!isMaxGasMinusRefundNegative && maxGasMinusRefund.lt(estimatedGas, 16)
|
|
? `0x${maxGasMinusRefund.toString(16)}`
|
|
: estimatedGas;
|
|
|
|
return gasEstimateWithRefund;
|
|
}
|
|
|
|
const initialState = {
|
|
swapsState: {
|
|
quotes: {},
|
|
quotesPollingLimitEnabled: false,
|
|
fetchParams: null,
|
|
tokens: null,
|
|
tradeTxId: null,
|
|
approveTxId: null,
|
|
quotesLastFetched: null,
|
|
customMaxGas: '',
|
|
customGasPrice: null,
|
|
customMaxFeePerGas: null,
|
|
customMaxPriorityFeePerGas: null,
|
|
swapsUserFeeLevel: '',
|
|
selectedAggId: null,
|
|
customApproveTxData: '',
|
|
errorKey: '',
|
|
topAggId: null,
|
|
routeState: '',
|
|
swapsFeatureIsLive: true,
|
|
saveFetchedQuotes: false,
|
|
swapsQuoteRefreshTime: FALLBACK_QUOTE_REFRESH_TIME,
|
|
swapsQuotePrefetchingRefreshTime: FALLBACK_QUOTE_REFRESH_TIME,
|
|
swapsStxBatchStatusRefreshTime: FALLBACK_SMART_TRANSACTIONS_REFRESH_TIME,
|
|
swapsStxGetTransactionsRefreshTime:
|
|
FALLBACK_SMART_TRANSACTIONS_REFRESH_TIME,
|
|
swapsStxMaxFeeMultiplier: FALLBACK_SMART_TRANSACTIONS_MAX_FEE_MULTIPLIER,
|
|
swapsFeatureFlags: {},
|
|
},
|
|
};
|
|
|
|
export default class SwapsController {
|
|
constructor({
|
|
getBufferedGasLimit,
|
|
networkController,
|
|
provider,
|
|
getProviderConfig,
|
|
getTokenRatesState,
|
|
fetchTradesInfo = defaultFetchTradesInfo,
|
|
getCurrentChainId,
|
|
getEIP1559GasFeeEstimates,
|
|
onNetworkStateChange,
|
|
}) {
|
|
this.store = new ObservableStore({
|
|
swapsState: { ...initialState.swapsState },
|
|
});
|
|
|
|
this.resetState = () => {
|
|
this.store.updateState({ swapsState: { ...initialState.swapsState } });
|
|
};
|
|
|
|
this._fetchTradesInfo = fetchTradesInfo;
|
|
this._getCurrentChainId = getCurrentChainId;
|
|
this._getEIP1559GasFeeEstimates = getEIP1559GasFeeEstimates;
|
|
|
|
this.getBufferedGasLimit = getBufferedGasLimit;
|
|
this.getTokenRatesState = getTokenRatesState;
|
|
|
|
this.pollCount = 0;
|
|
this.getProviderConfig = getProviderConfig;
|
|
|
|
this.indexOfNewestCallInFlight = 0;
|
|
|
|
this.ethersProvider = new Web3Provider(provider);
|
|
this._currentNetworkId = networkController.store.getState().networkId;
|
|
onNetworkStateChange(() => {
|
|
const { networkId, networkStatus } = networkController.store.getState();
|
|
if (
|
|
networkStatus === NetworkStatus.Available &&
|
|
networkId !== this._currentNetworkId
|
|
) {
|
|
this._currentNetworkId = networkId;
|
|
this.ethersProvider = new Web3Provider(provider);
|
|
}
|
|
});
|
|
}
|
|
|
|
async fetchSwapsNetworkConfig(chainId) {
|
|
const response = await fetchWithCache(
|
|
getBaseApi('network', chainId),
|
|
{ method: 'GET' },
|
|
{ cacheRefreshTime: 600000 },
|
|
);
|
|
const { refreshRates, parameters = {} } = response || {};
|
|
if (
|
|
!refreshRates ||
|
|
typeof refreshRates.quotes !== 'number' ||
|
|
typeof refreshRates.quotesPrefetching !== 'number'
|
|
) {
|
|
throw new Error(
|
|
`MetaMask - invalid response for refreshRates: ${response}`,
|
|
);
|
|
}
|
|
// We presently use milliseconds in the UI.
|
|
return {
|
|
quotes: refreshRates.quotes * 1000,
|
|
quotesPrefetching: refreshRates.quotesPrefetching * 1000,
|
|
stxGetTransactions: refreshRates.stxGetTransactions * 1000,
|
|
stxBatchStatus: refreshRates.stxBatchStatus * 1000,
|
|
stxStatusDeadline: refreshRates.stxStatusDeadline,
|
|
stxMaxFeeMultiplier: parameters.stxMaxFeeMultiplier,
|
|
};
|
|
}
|
|
|
|
// Sets the network config from the MetaSwap API.
|
|
async _setSwapsNetworkConfig() {
|
|
const chainId = this._getCurrentChainId();
|
|
let swapsNetworkConfig;
|
|
try {
|
|
swapsNetworkConfig = await this.fetchSwapsNetworkConfig(chainId);
|
|
} catch (e) {
|
|
console.error('Request for Swaps network config failed: ', e);
|
|
}
|
|
const { swapsState: latestSwapsState } = this.store.getState();
|
|
this.store.updateState({
|
|
swapsState: {
|
|
...latestSwapsState,
|
|
swapsQuoteRefreshTime:
|
|
swapsNetworkConfig?.quotes || FALLBACK_QUOTE_REFRESH_TIME,
|
|
swapsQuotePrefetchingRefreshTime:
|
|
swapsNetworkConfig?.quotesPrefetching || FALLBACK_QUOTE_REFRESH_TIME,
|
|
swapsStxGetTransactionsRefreshTime:
|
|
swapsNetworkConfig?.stxGetTransactions ||
|
|
FALLBACK_SMART_TRANSACTIONS_REFRESH_TIME,
|
|
swapsStxBatchStatusRefreshTime:
|
|
swapsNetworkConfig?.stxBatchStatus ||
|
|
FALLBACK_SMART_TRANSACTIONS_REFRESH_TIME,
|
|
swapsStxStatusDeadline:
|
|
swapsNetworkConfig?.stxStatusDeadline ||
|
|
FALLBACK_SMART_TRANSACTIONS_DEADLINE,
|
|
swapsStxMaxFeeMultiplier:
|
|
swapsNetworkConfig?.stxMaxFeeMultiplier ||
|
|
FALLBACK_SMART_TRANSACTIONS_MAX_FEE_MULTIPLIER,
|
|
},
|
|
});
|
|
}
|
|
|
|
// Once quotes are fetched, we poll for new ones to keep the quotes up to date. Market and aggregator contract conditions can change fast enough
|
|
// that quotes will no longer be available after 1 or 2 minutes. When fetchAndSetQuotes is first called, it receives fetch parameters that are stored in
|
|
// state. These stored parameters are used on subsequent calls made during polling.
|
|
// Note: we stop polling after 3 requests, until new quotes are explicitly asked for. The logic that enforces that maximum is in the body of fetchAndSetQuotes
|
|
pollForNewQuotes() {
|
|
const {
|
|
swapsState: {
|
|
swapsQuoteRefreshTime,
|
|
swapsQuotePrefetchingRefreshTime,
|
|
quotesPollingLimitEnabled,
|
|
},
|
|
} = this.store.getState();
|
|
// swapsQuoteRefreshTime is used on the View Quote page, swapsQuotePrefetchingRefreshTime is used on the Build Quote page.
|
|
const quotesRefreshRateInMs = quotesPollingLimitEnabled
|
|
? swapsQuoteRefreshTime
|
|
: swapsQuotePrefetchingRefreshTime;
|
|
this.pollingTimeout = setTimeout(() => {
|
|
const { swapsState } = this.store.getState();
|
|
this.fetchAndSetQuotes(
|
|
swapsState.fetchParams,
|
|
swapsState.fetchParams?.metaData,
|
|
true,
|
|
);
|
|
}, quotesRefreshRateInMs);
|
|
}
|
|
|
|
stopPollingForQuotes() {
|
|
if (this.pollingTimeout) {
|
|
clearTimeout(this.pollingTimeout);
|
|
}
|
|
}
|
|
|
|
async fetchAndSetQuotes(
|
|
fetchParams,
|
|
fetchParamsMetaData = {},
|
|
isPolledRequest,
|
|
) {
|
|
const { chainId } = fetchParamsMetaData;
|
|
const {
|
|
swapsState: { quotesPollingLimitEnabled, saveFetchedQuotes },
|
|
} = this.store.getState();
|
|
|
|
if (!fetchParams) {
|
|
return null;
|
|
}
|
|
// Every time we get a new request that is not from the polling, we reset the poll count so we can poll for up to three more sets of quotes with these new params.
|
|
if (!isPolledRequest) {
|
|
this.pollCount = 0;
|
|
}
|
|
|
|
// If there are any pending poll requests, clear them so that they don't get call while this new fetch is in process
|
|
clearTimeout(this.pollingTimeout);
|
|
|
|
if (!isPolledRequest) {
|
|
this.setSwapsErrorKey('');
|
|
}
|
|
|
|
const indexOfCurrentCall = this.indexOfNewestCallInFlight + 1;
|
|
this.indexOfNewestCallInFlight = indexOfCurrentCall;
|
|
|
|
if (!saveFetchedQuotes) {
|
|
this.setSaveFetchedQuotes(true);
|
|
}
|
|
|
|
let [newQuotes] = await Promise.all([
|
|
this._fetchTradesInfo(fetchParams, {
|
|
...fetchParamsMetaData,
|
|
}),
|
|
this._setSwapsNetworkConfig(),
|
|
]);
|
|
|
|
const {
|
|
swapsState: { saveFetchedQuotes: saveFetchedQuotesAfterResponse },
|
|
} = this.store.getState();
|
|
|
|
// If saveFetchedQuotesAfterResponse is false, it means a user left Swaps (we cleaned the state)
|
|
// and we don't want to set any API response with quotes into state.
|
|
if (!saveFetchedQuotesAfterResponse) {
|
|
return [
|
|
{}, // quotes
|
|
null, // selectedAggId
|
|
];
|
|
}
|
|
|
|
newQuotes = mapValues(newQuotes, (quote) => ({
|
|
...quote,
|
|
sourceTokenInfo: fetchParamsMetaData.sourceTokenInfo,
|
|
destinationTokenInfo: fetchParamsMetaData.destinationTokenInfo,
|
|
}));
|
|
|
|
if (chainId === CHAIN_IDS.OPTIMISM && Object.values(newQuotes).length > 0) {
|
|
await Promise.all(
|
|
Object.values(newQuotes).map(async (quote) => {
|
|
if (quote.trade) {
|
|
const multiLayerL1TradeFeeTotal = await fetchEstimatedL1Fee(
|
|
chainId,
|
|
{
|
|
txParams: quote.trade,
|
|
chainId,
|
|
},
|
|
this.ethersProvider,
|
|
);
|
|
quote.multiLayerL1TradeFeeTotal = multiLayerL1TradeFeeTotal;
|
|
}
|
|
return quote;
|
|
}),
|
|
);
|
|
}
|
|
|
|
const quotesLastFetched = Date.now();
|
|
|
|
let approvalRequired = false;
|
|
if (
|
|
!isSwapsDefaultTokenAddress(fetchParams.sourceToken, chainId) &&
|
|
Object.values(newQuotes).length
|
|
) {
|
|
const allowance = await this._getERC20Allowance(
|
|
fetchParams.sourceToken,
|
|
fetchParams.fromAddress,
|
|
chainId,
|
|
);
|
|
const [firstQuote] = Object.values(newQuotes);
|
|
|
|
// For a user to be able to swap a token, they need to have approved the MetaSwap contract to withdraw that token.
|
|
// _getERC20Allowance() returns the amount of the token they have approved for withdrawal. If that amount is greater
|
|
// than 0, it means that approval has already occurred and is not needed. Otherwise, for tokens to be swapped, a new
|
|
// call of the ERC-20 approve method is required.
|
|
approvalRequired =
|
|
firstQuote.approvalNeeded &&
|
|
allowance.eq(0) &&
|
|
firstQuote.aggregator !== 'wrappedNative';
|
|
if (!approvalRequired) {
|
|
newQuotes = mapValues(newQuotes, (quote) => ({
|
|
...quote,
|
|
approvalNeeded: null,
|
|
}));
|
|
} else if (!isPolledRequest) {
|
|
const { gasLimit: approvalGas } = await this.timedoutGasReturn(
|
|
firstQuote.approvalNeeded,
|
|
);
|
|
|
|
newQuotes = mapValues(newQuotes, (quote) => ({
|
|
...quote,
|
|
approvalNeeded: {
|
|
...quote.approvalNeeded,
|
|
gas: approvalGas || DEFAULT_ERC20_APPROVE_GAS,
|
|
},
|
|
}));
|
|
}
|
|
}
|
|
|
|
let topAggId = null;
|
|
|
|
// We can reduce time on the loading screen by only doing this after the
|
|
// loading screen and best quote have rendered.
|
|
if (!approvalRequired && !fetchParams?.balanceError) {
|
|
newQuotes = await this.getAllQuotesWithGasEstimates(newQuotes);
|
|
}
|
|
|
|
if (Object.values(newQuotes).length === 0) {
|
|
this.setSwapsErrorKey(QUOTES_NOT_AVAILABLE_ERROR);
|
|
} else {
|
|
const [_topAggId, quotesWithSavingsAndFeeData] =
|
|
await this._findTopQuoteAndCalculateSavings(newQuotes);
|
|
topAggId = _topAggId;
|
|
newQuotes = quotesWithSavingsAndFeeData;
|
|
}
|
|
|
|
// If a newer call has been made, don't update state with old information
|
|
// Prevents timing conflicts between fetches
|
|
if (this.indexOfNewestCallInFlight !== indexOfCurrentCall) {
|
|
throw new Error(SWAPS_FETCH_ORDER_CONFLICT);
|
|
}
|
|
|
|
const { swapsState } = this.store.getState();
|
|
let { selectedAggId } = swapsState;
|
|
if (!newQuotes[selectedAggId]) {
|
|
selectedAggId = null;
|
|
}
|
|
|
|
this.store.updateState({
|
|
swapsState: {
|
|
...swapsState,
|
|
quotes: newQuotes,
|
|
fetchParams: { ...fetchParams, metaData: fetchParamsMetaData },
|
|
quotesLastFetched,
|
|
selectedAggId,
|
|
topAggId,
|
|
},
|
|
});
|
|
|
|
if (quotesPollingLimitEnabled) {
|
|
// We only want to do up to a maximum of three requests from polling if polling limit is enabled.
|
|
// Otherwise we won't increase pollCount, so polling will run without a limit.
|
|
this.pollCount += 1;
|
|
}
|
|
|
|
if (!quotesPollingLimitEnabled || this.pollCount < POLL_COUNT_LIMIT + 1) {
|
|
this.pollForNewQuotes();
|
|
} else {
|
|
this.resetPostFetchState();
|
|
this.setSwapsErrorKey(QUOTES_EXPIRED_ERROR);
|
|
return null;
|
|
}
|
|
|
|
return [newQuotes, topAggId];
|
|
}
|
|
|
|
safeRefetchQuotes() {
|
|
const { swapsState } = this.store.getState();
|
|
if (!this.pollingTimeout && swapsState.fetchParams) {
|
|
this.fetchAndSetQuotes(swapsState.fetchParams);
|
|
}
|
|
}
|
|
|
|
setSelectedQuoteAggId(selectedAggId) {
|
|
const { swapsState } = this.store.getState();
|
|
this.store.updateState({ swapsState: { ...swapsState, selectedAggId } });
|
|
}
|
|
|
|
setSwapsTokens(tokens) {
|
|
const { swapsState } = this.store.getState();
|
|
this.store.updateState({ swapsState: { ...swapsState, tokens } });
|
|
}
|
|
|
|
clearSwapsQuotes() {
|
|
const { swapsState } = this.store.getState();
|
|
this.store.updateState({ swapsState: { ...swapsState, quotes: {} } });
|
|
}
|
|
|
|
setSwapsErrorKey(errorKey) {
|
|
const { swapsState } = this.store.getState();
|
|
this.store.updateState({ swapsState: { ...swapsState, errorKey } });
|
|
}
|
|
|
|
async getAllQuotesWithGasEstimates(quotes) {
|
|
const quoteGasData = await Promise.all(
|
|
Object.values(quotes).map(async (quote) => {
|
|
const { gasLimit, simulationFails } = await this.timedoutGasReturn(
|
|
quote.trade,
|
|
);
|
|
return [gasLimit, simulationFails, quote.aggregator];
|
|
}),
|
|
);
|
|
|
|
const newQuotes = {};
|
|
quoteGasData.forEach(([gasLimit, simulationFails, aggId]) => {
|
|
if (gasLimit && !simulationFails) {
|
|
const gasEstimateWithRefund = calculateGasEstimateWithRefund(
|
|
quotes[aggId].maxGas,
|
|
quotes[aggId].estimatedRefund,
|
|
gasLimit,
|
|
);
|
|
|
|
newQuotes[aggId] = {
|
|
...quotes[aggId],
|
|
gasEstimate: gasLimit,
|
|
gasEstimateWithRefund,
|
|
};
|
|
} else if (quotes[aggId].approvalNeeded) {
|
|
// If gas estimation fails, but an ERC-20 approve is needed, then we do not add any estimate property to the quote object
|
|
// Such quotes will rely on the maxGas and averageGas properties from the api
|
|
newQuotes[aggId] = quotes[aggId];
|
|
}
|
|
// If gas estimation fails and no approval is needed, then we filter that quote out, so that it is not shown to the user
|
|
});
|
|
return newQuotes;
|
|
}
|
|
|
|
timedoutGasReturn(tradeTxParams) {
|
|
return new Promise((resolve) => {
|
|
let gasTimedOut = false;
|
|
|
|
const gasTimeout = setTimeout(() => {
|
|
gasTimedOut = true;
|
|
resolve({ gasLimit: null, simulationFails: true });
|
|
}, SECOND * 5);
|
|
|
|
// Remove gas from params that will be passed to the `estimateGas` call
|
|
// Including it can cause the estimate to fail if the actual gas needed
|
|
// exceeds the passed gas
|
|
const tradeTxParamsForGasEstimate = {
|
|
data: tradeTxParams.data,
|
|
from: tradeTxParams.from,
|
|
to: tradeTxParams.to,
|
|
value: tradeTxParams.value,
|
|
};
|
|
|
|
this.getBufferedGasLimit({ txParams: tradeTxParamsForGasEstimate }, 1)
|
|
.then(({ gasLimit, simulationFails }) => {
|
|
if (!gasTimedOut) {
|
|
clearTimeout(gasTimeout);
|
|
resolve({ gasLimit, simulationFails });
|
|
}
|
|
})
|
|
.catch((e) => {
|
|
log.error(e);
|
|
if (!gasTimedOut) {
|
|
clearTimeout(gasTimeout);
|
|
resolve({ gasLimit: null, simulationFails: true });
|
|
}
|
|
});
|
|
});
|
|
}
|
|
|
|
async setInitialGasEstimate(initialAggId) {
|
|
const { swapsState } = this.store.getState();
|
|
|
|
const quoteToUpdate = { ...swapsState.quotes[initialAggId] };
|
|
|
|
const { gasLimit: newGasEstimate, simulationFails } =
|
|
await this.timedoutGasReturn(quoteToUpdate.trade);
|
|
|
|
if (newGasEstimate && !simulationFails) {
|
|
const gasEstimateWithRefund = calculateGasEstimateWithRefund(
|
|
quoteToUpdate.maxGas,
|
|
quoteToUpdate.estimatedRefund,
|
|
newGasEstimate,
|
|
);
|
|
|
|
quoteToUpdate.gasEstimate = newGasEstimate;
|
|
quoteToUpdate.gasEstimateWithRefund = gasEstimateWithRefund;
|
|
}
|
|
|
|
this.store.updateState({
|
|
swapsState: {
|
|
...swapsState,
|
|
quotes: { ...swapsState.quotes, [initialAggId]: quoteToUpdate },
|
|
},
|
|
});
|
|
}
|
|
|
|
setApproveTxId(approveTxId) {
|
|
const { swapsState } = this.store.getState();
|
|
this.store.updateState({ swapsState: { ...swapsState, approveTxId } });
|
|
}
|
|
|
|
setTradeTxId(tradeTxId) {
|
|
const { swapsState } = this.store.getState();
|
|
this.store.updateState({ swapsState: { ...swapsState, tradeTxId } });
|
|
}
|
|
|
|
setQuotesLastFetched(quotesLastFetched) {
|
|
const { swapsState } = this.store.getState();
|
|
this.store.updateState({
|
|
swapsState: { ...swapsState, quotesLastFetched },
|
|
});
|
|
}
|
|
|
|
setSwapsTxGasPrice(gasPrice) {
|
|
const { swapsState } = this.store.getState();
|
|
this.store.updateState({
|
|
swapsState: { ...swapsState, customGasPrice: gasPrice },
|
|
});
|
|
}
|
|
|
|
setSwapsTxMaxFeePerGas(maxFeePerGas) {
|
|
const { swapsState } = this.store.getState();
|
|
this.store.updateState({
|
|
swapsState: { ...swapsState, customMaxFeePerGas: maxFeePerGas },
|
|
});
|
|
}
|
|
|
|
setSwapsUserFeeLevel(swapsUserFeeLevel) {
|
|
const { swapsState } = this.store.getState();
|
|
this.store.updateState({
|
|
swapsState: { ...swapsState, swapsUserFeeLevel },
|
|
});
|
|
}
|
|
|
|
setSwapsQuotesPollingLimitEnabled(quotesPollingLimitEnabled) {
|
|
const { swapsState } = this.store.getState();
|
|
this.store.updateState({
|
|
swapsState: { ...swapsState, quotesPollingLimitEnabled },
|
|
});
|
|
}
|
|
|
|
setSwapsTxMaxFeePriorityPerGas(maxPriorityFeePerGas) {
|
|
const { swapsState } = this.store.getState();
|
|
this.store.updateState({
|
|
swapsState: {
|
|
...swapsState,
|
|
customMaxPriorityFeePerGas: maxPriorityFeePerGas,
|
|
},
|
|
});
|
|
}
|
|
|
|
setSwapsTxGasLimit(gasLimit) {
|
|
const { swapsState } = this.store.getState();
|
|
this.store.updateState({
|
|
swapsState: { ...swapsState, customMaxGas: gasLimit },
|
|
});
|
|
}
|
|
|
|
setCustomApproveTxData(data) {
|
|
const { swapsState } = this.store.getState();
|
|
this.store.updateState({
|
|
swapsState: { ...swapsState, customApproveTxData: data },
|
|
});
|
|
}
|
|
|
|
setBackgroundSwapRouteState(routeState) {
|
|
const { swapsState } = this.store.getState();
|
|
this.store.updateState({ swapsState: { ...swapsState, routeState } });
|
|
}
|
|
|
|
setSaveFetchedQuotes(status) {
|
|
const { swapsState } = this.store.getState();
|
|
this.store.updateState({
|
|
swapsState: { ...swapsState, saveFetchedQuotes: status },
|
|
});
|
|
}
|
|
|
|
setSwapsLiveness(swapsLiveness) {
|
|
const { swapsState } = this.store.getState();
|
|
const { swapsFeatureIsLive } = swapsLiveness;
|
|
this.store.updateState({
|
|
swapsState: { ...swapsState, swapsFeatureIsLive },
|
|
});
|
|
}
|
|
|
|
setSwapsFeatureFlags(swapsFeatureFlags) {
|
|
const { swapsState } = this.store.getState();
|
|
this.store.updateState({
|
|
swapsState: { ...swapsState, swapsFeatureFlags },
|
|
});
|
|
}
|
|
|
|
resetPostFetchState() {
|
|
const { swapsState } = this.store.getState();
|
|
this.store.updateState({
|
|
swapsState: {
|
|
...initialState.swapsState,
|
|
tokens: swapsState.tokens,
|
|
fetchParams: swapsState.fetchParams,
|
|
swapsFeatureIsLive: swapsState.swapsFeatureIsLive,
|
|
swapsQuoteRefreshTime: swapsState.swapsQuoteRefreshTime,
|
|
swapsQuotePrefetchingRefreshTime:
|
|
swapsState.swapsQuotePrefetchingRefreshTime,
|
|
swapsFeatureFlags: swapsState.swapsFeatureFlags,
|
|
},
|
|
});
|
|
clearTimeout(this.pollingTimeout);
|
|
}
|
|
|
|
resetSwapsState() {
|
|
const { swapsState } = this.store.getState();
|
|
this.store.updateState({
|
|
swapsState: {
|
|
...initialState.swapsState,
|
|
swapsQuoteRefreshTime: swapsState.swapsQuoteRefreshTime,
|
|
swapsQuotePrefetchingRefreshTime:
|
|
swapsState.swapsQuotePrefetchingRefreshTime,
|
|
},
|
|
});
|
|
clearTimeout(this.pollingTimeout);
|
|
}
|
|
|
|
async _findTopQuoteAndCalculateSavings(quotes = {}) {
|
|
const { contractExchangeRates: tokenConversionRates } =
|
|
this.getTokenRatesState();
|
|
const {
|
|
swapsState: { customGasPrice, customMaxPriorityFeePerGas },
|
|
} = this.store.getState();
|
|
const chainId = this._getCurrentChainId();
|
|
|
|
const numQuotes = Object.keys(quotes).length;
|
|
if (!numQuotes) {
|
|
return {};
|
|
}
|
|
|
|
const newQuotes = cloneDeep(quotes);
|
|
|
|
const { gasFeeEstimates, gasEstimateType } =
|
|
await this._getEIP1559GasFeeEstimates();
|
|
|
|
let usedGasPrice = '0x0';
|
|
|
|
if (gasEstimateType === GasEstimateTypes.feeMarket) {
|
|
const {
|
|
high: { suggestedMaxPriorityFeePerGas },
|
|
estimatedBaseFee,
|
|
} = gasFeeEstimates;
|
|
|
|
const suggestedMaxPriorityFeePerGasInHexWEI = decGWEIToHexWEI(
|
|
suggestedMaxPriorityFeePerGas,
|
|
);
|
|
const estimatedBaseFeeNumeric = new Numeric(
|
|
estimatedBaseFee,
|
|
10,
|
|
EtherDenomination.GWEI,
|
|
).toDenomination(EtherDenomination.WEI);
|
|
|
|
usedGasPrice = new Numeric(
|
|
customMaxPriorityFeePerGas || suggestedMaxPriorityFeePerGasInHexWEI,
|
|
16,
|
|
)
|
|
.add(estimatedBaseFeeNumeric)
|
|
.round(6)
|
|
.toString();
|
|
} else if (gasEstimateType === GasEstimateTypes.legacy) {
|
|
usedGasPrice = customGasPrice || decGWEIToHexWEI(gasFeeEstimates.high);
|
|
} else if (gasEstimateType === GasEstimateTypes.ethGasPrice) {
|
|
usedGasPrice =
|
|
customGasPrice || decGWEIToHexWEI(gasFeeEstimates.gasPrice);
|
|
}
|
|
|
|
let topAggId = null;
|
|
let overallValueOfBestQuoteForSorting = null;
|
|
|
|
Object.values(newQuotes).forEach((quote) => {
|
|
const {
|
|
aggregator,
|
|
approvalNeeded,
|
|
averageGas,
|
|
destinationAmount = 0,
|
|
destinationToken,
|
|
destinationTokenInfo,
|
|
gasEstimateWithRefund,
|
|
sourceAmount,
|
|
sourceToken,
|
|
trade,
|
|
fee: metaMaskFee,
|
|
multiLayerL1TradeFeeTotal,
|
|
} = quote;
|
|
|
|
const tradeGasLimitForCalculation = gasEstimateWithRefund
|
|
? new BigNumber(gasEstimateWithRefund, 16)
|
|
: new BigNumber(averageGas || MAX_GAS_LIMIT, 10);
|
|
|
|
const totalGasLimitForCalculation = tradeGasLimitForCalculation
|
|
.plus(approvalNeeded?.gas || '0x0', 16)
|
|
.toString(16);
|
|
|
|
let gasTotalInWeiHex = calcGasTotal(
|
|
totalGasLimitForCalculation,
|
|
usedGasPrice,
|
|
);
|
|
if (multiLayerL1TradeFeeTotal !== null) {
|
|
gasTotalInWeiHex = sumHexes(
|
|
gasTotalInWeiHex || '0x0',
|
|
multiLayerL1TradeFeeTotal || '0x0',
|
|
);
|
|
}
|
|
|
|
// trade.value is a sum of different values depending on the transaction.
|
|
// It always includes any external fees charged by the quote source. In
|
|
// addition, if the source asset is the selected chain's default token, trade.value
|
|
// includes the amount of that token.
|
|
const totalWeiCost = new Numeric(
|
|
gasTotalInWeiHex,
|
|
16,
|
|
EtherDenomination.WEI,
|
|
).add(new Numeric(trade.value, 16, EtherDenomination.WEI));
|
|
|
|
const totalEthCost = totalWeiCost
|
|
.toDenomination(EtherDenomination.ETH)
|
|
.round(6).value;
|
|
|
|
// The total fee is aggregator/exchange fees plus gas fees.
|
|
// If the swap is from the selected chain's default token, subtract
|
|
// the sourceAmount from the total cost. Otherwise, the total fee
|
|
// is simply trade.value plus gas fees.
|
|
const ethFee = isSwapsDefaultTokenAddress(sourceToken, chainId)
|
|
? totalWeiCost
|
|
.minus(new Numeric(sourceAmount, 10))
|
|
.toDenomination(EtherDenomination.ETH)
|
|
.round(6).value
|
|
: totalEthCost;
|
|
|
|
const decimalAdjustedDestinationAmount = calcTokenAmount(
|
|
destinationAmount,
|
|
destinationTokenInfo.decimals,
|
|
);
|
|
|
|
const tokenPercentageOfPreFeeDestAmount = new BigNumber(100, 10)
|
|
.minus(metaMaskFee, 10)
|
|
.div(100);
|
|
const destinationAmountBeforeMetaMaskFee =
|
|
decimalAdjustedDestinationAmount.div(tokenPercentageOfPreFeeDestAmount);
|
|
const metaMaskFeeInTokens = destinationAmountBeforeMetaMaskFee.minus(
|
|
decimalAdjustedDestinationAmount,
|
|
);
|
|
|
|
const tokenConversionRate =
|
|
tokenConversionRates[
|
|
Object.keys(tokenConversionRates).find((tokenAddress) =>
|
|
isEqualCaseInsensitive(tokenAddress, destinationToken),
|
|
)
|
|
];
|
|
const conversionRateForSorting = tokenConversionRate || 1;
|
|
|
|
const ethValueOfTokens = decimalAdjustedDestinationAmount.times(
|
|
conversionRateForSorting.toString(10),
|
|
10,
|
|
);
|
|
|
|
const conversionRateForCalculations = isSwapsDefaultTokenAddress(
|
|
destinationToken,
|
|
chainId,
|
|
)
|
|
? 1
|
|
: tokenConversionRate;
|
|
|
|
const overallValueOfQuoteForSorting =
|
|
conversionRateForCalculations === undefined
|
|
? ethValueOfTokens
|
|
: ethValueOfTokens.minus(ethFee, 10);
|
|
|
|
quote.ethFee = ethFee.toString(10);
|
|
|
|
if (conversionRateForCalculations !== undefined) {
|
|
quote.ethValueOfTokens = ethValueOfTokens.toString(10);
|
|
quote.overallValueOfQuote = overallValueOfQuoteForSorting.toString(10);
|
|
quote.metaMaskFeeInEth = metaMaskFeeInTokens
|
|
.times(conversionRateForCalculations.toString(10))
|
|
.toString(10);
|
|
}
|
|
|
|
if (
|
|
overallValueOfBestQuoteForSorting === null ||
|
|
overallValueOfQuoteForSorting.gt(overallValueOfBestQuoteForSorting)
|
|
) {
|
|
topAggId = aggregator;
|
|
overallValueOfBestQuoteForSorting = overallValueOfQuoteForSorting;
|
|
}
|
|
});
|
|
|
|
const isBest =
|
|
isSwapsDefaultTokenAddress(
|
|
newQuotes[topAggId].destinationToken,
|
|
chainId,
|
|
) ||
|
|
Boolean(
|
|
tokenConversionRates[
|
|
Object.keys(tokenConversionRates).find((tokenAddress) =>
|
|
isEqualCaseInsensitive(
|
|
tokenAddress,
|
|
newQuotes[topAggId]?.destinationToken,
|
|
),
|
|
)
|
|
],
|
|
);
|
|
|
|
let savings = null;
|
|
|
|
if (isBest) {
|
|
const bestQuote = newQuotes[topAggId];
|
|
|
|
savings = {};
|
|
|
|
const {
|
|
ethFee: medianEthFee,
|
|
metaMaskFeeInEth: medianMetaMaskFee,
|
|
ethValueOfTokens: medianEthValueOfTokens,
|
|
} = getMedianEthValueQuote(Object.values(newQuotes));
|
|
|
|
// Performance savings are calculated as:
|
|
// (ethValueOfTokens for the best trade) - (ethValueOfTokens for the media trade)
|
|
savings.performance = new BigNumber(bestQuote.ethValueOfTokens, 10).minus(
|
|
medianEthValueOfTokens,
|
|
10,
|
|
);
|
|
|
|
// Fee savings are calculated as:
|
|
// (fee for the median trade) - (fee for the best trade)
|
|
savings.fee = new BigNumber(medianEthFee).minus(bestQuote.ethFee, 10);
|
|
|
|
savings.metaMaskFee = bestQuote.metaMaskFeeInEth;
|
|
|
|
// Total savings are calculated as:
|
|
// performance savings + fee savings - metamask fee
|
|
savings.total = savings.performance
|
|
.plus(savings.fee)
|
|
.minus(savings.metaMaskFee)
|
|
.toString(10);
|
|
savings.performance = savings.performance.toString(10);
|
|
savings.fee = savings.fee.toString(10);
|
|
savings.medianMetaMaskFee = medianMetaMaskFee;
|
|
|
|
newQuotes[topAggId].isBestQuote = true;
|
|
newQuotes[topAggId].savings = savings;
|
|
}
|
|
|
|
return [topAggId, newQuotes];
|
|
}
|
|
|
|
async _getERC20Allowance(contractAddress, walletAddress, chainId) {
|
|
const contract = new Contract(contractAddress, abi, this.ethersProvider);
|
|
return await contract.allowance(
|
|
walletAddress,
|
|
SWAPS_CHAINID_CONTRACT_ADDRESS_MAP[chainId],
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Calculates the median overallValueOfQuote of a sample of quotes.
|
|
*
|
|
* @param {Array} _quotes - A sample of quote objects with overallValueOfQuote, ethFee, metaMaskFeeInEth, and ethValueOfTokens properties
|
|
* @returns {object} An object with the ethValueOfTokens, ethFee, and metaMaskFeeInEth of the quote with the median overallValueOfQuote
|
|
*/
|
|
function getMedianEthValueQuote(_quotes) {
|
|
if (!Array.isArray(_quotes) || _quotes.length === 0) {
|
|
throw new Error('Expected non-empty array param.');
|
|
}
|
|
|
|
const quotes = [..._quotes];
|
|
|
|
quotes.sort((quoteA, quoteB) => {
|
|
const overallValueOfQuoteA = new BigNumber(quoteA.overallValueOfQuote, 10);
|
|
const overallValueOfQuoteB = new BigNumber(quoteB.overallValueOfQuote, 10);
|
|
if (overallValueOfQuoteA.equals(overallValueOfQuoteB)) {
|
|
return 0;
|
|
}
|
|
return overallValueOfQuoteA.lessThan(overallValueOfQuoteB) ? -1 : 1;
|
|
});
|
|
|
|
if (quotes.length % 2 === 1) {
|
|
// return middle values
|
|
const medianOverallValue =
|
|
quotes[(quotes.length - 1) / 2].overallValueOfQuote;
|
|
const quotesMatchingMedianQuoteValue = quotes.filter(
|
|
(quote) => medianOverallValue === quote.overallValueOfQuote,
|
|
);
|
|
return meansOfQuotesFeesAndValue(quotesMatchingMedianQuoteValue);
|
|
}
|
|
|
|
// return mean of middle two values
|
|
const upperIndex = quotes.length / 2;
|
|
const lowerIndex = upperIndex - 1;
|
|
|
|
const overallValueAtUpperIndex = quotes[upperIndex].overallValueOfQuote;
|
|
const overallValueAtLowerIndex = quotes[lowerIndex].overallValueOfQuote;
|
|
|
|
const quotesMatchingUpperIndexValue = quotes.filter(
|
|
(quote) => overallValueAtUpperIndex === quote.overallValueOfQuote,
|
|
);
|
|
const quotesMatchingLowerIndexValue = quotes.filter(
|
|
(quote) => overallValueAtLowerIndex === quote.overallValueOfQuote,
|
|
);
|
|
|
|
const feesAndValueAtUpperIndex = meansOfQuotesFeesAndValue(
|
|
quotesMatchingUpperIndexValue,
|
|
);
|
|
const feesAndValueAtLowerIndex = meansOfQuotesFeesAndValue(
|
|
quotesMatchingLowerIndexValue,
|
|
);
|
|
|
|
return {
|
|
ethFee: new BigNumber(feesAndValueAtUpperIndex.ethFee, 10)
|
|
.plus(feesAndValueAtLowerIndex.ethFee, 10)
|
|
.dividedBy(2)
|
|
.toString(10),
|
|
metaMaskFeeInEth: new BigNumber(
|
|
feesAndValueAtUpperIndex.metaMaskFeeInEth,
|
|
10,
|
|
)
|
|
.plus(feesAndValueAtLowerIndex.metaMaskFeeInEth, 10)
|
|
.dividedBy(2)
|
|
.toString(10),
|
|
ethValueOfTokens: new BigNumber(
|
|
feesAndValueAtUpperIndex.ethValueOfTokens,
|
|
10,
|
|
)
|
|
.plus(feesAndValueAtLowerIndex.ethValueOfTokens, 10)
|
|
.dividedBy(2)
|
|
.toString(10),
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Calculates the arithmetic mean for each of three properties - ethFee, metaMaskFeeInEth and ethValueOfTokens - across
|
|
* an array of objects containing those properties.
|
|
*
|
|
* @param {Array} quotes - A sample of quote objects with overallValueOfQuote, ethFee, metaMaskFeeInEth and
|
|
* ethValueOfTokens properties
|
|
* @returns {object} An object with the arithmetic mean each of the ethFee, metaMaskFeeInEth and ethValueOfTokens of
|
|
* the passed quote objects
|
|
*/
|
|
function meansOfQuotesFeesAndValue(quotes) {
|
|
const feeAndValueSumsAsBigNumbers = quotes.reduce(
|
|
(feeAndValueSums, quote) => ({
|
|
ethFee: feeAndValueSums.ethFee.plus(quote.ethFee, 10),
|
|
metaMaskFeeInEth: feeAndValueSums.metaMaskFeeInEth.plus(
|
|
quote.metaMaskFeeInEth,
|
|
10,
|
|
),
|
|
ethValueOfTokens: feeAndValueSums.ethValueOfTokens.plus(
|
|
quote.ethValueOfTokens,
|
|
10,
|
|
),
|
|
}),
|
|
{
|
|
ethFee: new BigNumber(0, 10),
|
|
metaMaskFeeInEth: new BigNumber(0, 10),
|
|
ethValueOfTokens: new BigNumber(0, 10),
|
|
},
|
|
);
|
|
|
|
return {
|
|
ethFee: feeAndValueSumsAsBigNumbers.ethFee
|
|
.div(quotes.length, 10)
|
|
.toString(10),
|
|
metaMaskFeeInEth: feeAndValueSumsAsBigNumbers.metaMaskFeeInEth
|
|
.div(quotes.length, 10)
|
|
.toString(10),
|
|
ethValueOfTokens: feeAndValueSumsAsBigNumbers.ethValueOfTokens
|
|
.div(quotes.length, 10)
|
|
.toString(10),
|
|
};
|
|
}
|
|
|
|
export const utils = {
|
|
getMedianEthValueQuote,
|
|
meansOfQuotesFeesAndValue,
|
|
};
|