You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
619 lines
16 KiB
619 lines
16 KiB
import log from 'loglevel'
|
|
import BigNumber from 'bignumber.js'
|
|
import abi from 'human-standard-token-abi'
|
|
import { isValidAddress } from 'ethereumjs-util'
|
|
import { ETH_SWAPS_TOKEN_OBJECT } from '../../helpers/constants/swaps'
|
|
import { calcTokenValue, calcTokenAmount } from '../../helpers/utils/token-util'
|
|
import {
|
|
constructTxParams,
|
|
toPrecisionWithoutTrailingZeros,
|
|
} from '../../helpers/utils/util'
|
|
import {
|
|
decimalToHex,
|
|
getValueFromWeiHex,
|
|
} from '../../helpers/utils/conversions.util'
|
|
|
|
import { subtractCurrencies } from '../../helpers/utils/conversion-util'
|
|
import { formatCurrency } from '../../helpers/utils/confirm-tx.util'
|
|
import fetchWithCache from '../../helpers/utils/fetch-with-cache'
|
|
|
|
import { calcGasTotal } from '../send/send.utils'
|
|
|
|
const TOKEN_TRANSFER_LOG_TOPIC_HASH =
|
|
'0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef'
|
|
|
|
const CACHE_REFRESH_ONE_HOUR = 3600000
|
|
|
|
const getBaseApi = function (type) {
|
|
switch (type) {
|
|
case 'trade':
|
|
return `https://api.metaswap.codefi.network/trades?`
|
|
case 'tokens':
|
|
return `https://api.metaswap.codefi.network/tokens`
|
|
case 'topAssets':
|
|
return `https://api.metaswap.codefi.network/topAssets`
|
|
case 'featureFlag':
|
|
return `https://api.metaswap.codefi.network/featureFlag`
|
|
case 'aggregatorMetadata':
|
|
return `https://api.metaswap.codefi.network/aggregatorMetadata`
|
|
case 'gasPrices':
|
|
return `https://api.metaswap.codefi.network/gasPrices`
|
|
default:
|
|
throw new Error('getBaseApi requires an api call type')
|
|
}
|
|
}
|
|
|
|
const validHex = (string) => Boolean(string?.match(/^0x[a-f0-9]+$/u))
|
|
const truthyString = (string) => Boolean(string?.length)
|
|
const truthyDigitString = (string) =>
|
|
truthyString(string) && Boolean(string.match(/^\d+$/u))
|
|
|
|
const QUOTE_VALIDATORS = [
|
|
{
|
|
property: 'trade',
|
|
type: 'object',
|
|
validator: (trade) =>
|
|
trade &&
|
|
validHex(trade.data) &&
|
|
isValidAddress(trade.to) &&
|
|
isValidAddress(trade.from) &&
|
|
truthyString(trade.value),
|
|
},
|
|
{
|
|
property: 'approvalNeeded',
|
|
type: 'object',
|
|
validator: (approvalTx) =>
|
|
approvalTx === null ||
|
|
(approvalTx &&
|
|
validHex(approvalTx.data) &&
|
|
isValidAddress(approvalTx.to) &&
|
|
isValidAddress(approvalTx.from)),
|
|
},
|
|
{
|
|
property: 'sourceAmount',
|
|
type: 'string',
|
|
validator: truthyDigitString,
|
|
},
|
|
{
|
|
property: 'destinationAmount',
|
|
type: 'string',
|
|
validator: truthyDigitString,
|
|
},
|
|
{
|
|
property: 'sourceToken',
|
|
type: 'string',
|
|
validator: isValidAddress,
|
|
},
|
|
{
|
|
property: 'destinationToken',
|
|
type: 'string',
|
|
validator: isValidAddress,
|
|
},
|
|
{
|
|
property: 'aggregator',
|
|
type: 'string',
|
|
validator: truthyString,
|
|
},
|
|
{
|
|
property: 'aggType',
|
|
type: 'string',
|
|
validator: truthyString,
|
|
},
|
|
{
|
|
property: 'error',
|
|
type: 'object',
|
|
validator: (error) => error === null || typeof error === 'object',
|
|
},
|
|
{
|
|
property: 'averageGas',
|
|
type: 'number',
|
|
},
|
|
{
|
|
property: 'maxGas',
|
|
type: 'number',
|
|
},
|
|
]
|
|
|
|
const TOKEN_VALIDATORS = [
|
|
{
|
|
property: 'address',
|
|
type: 'string',
|
|
validator: isValidAddress,
|
|
},
|
|
{
|
|
property: 'symbol',
|
|
type: 'string',
|
|
validator: (string) => truthyString(string) && string.length <= 12,
|
|
},
|
|
{
|
|
property: 'decimals',
|
|
type: 'string|number',
|
|
validator: (string) => Number(string) >= 0 && Number(string) <= 36,
|
|
},
|
|
]
|
|
|
|
const TOP_ASSET_VALIDATORS = TOKEN_VALIDATORS.slice(0, 2)
|
|
|
|
const AGGREGATOR_METADATA_VALIDATORS = [
|
|
{
|
|
property: 'color',
|
|
type: 'string',
|
|
validator: (string) => Boolean(string.match(/^#[A-Fa-f0-9]+$/u)),
|
|
},
|
|
{
|
|
property: 'title',
|
|
type: 'string',
|
|
validator: truthyString,
|
|
},
|
|
{
|
|
property: 'icon',
|
|
type: 'string',
|
|
validator: (string) => Boolean(string.match(/^data:image/u)),
|
|
},
|
|
]
|
|
|
|
const isValidDecimalNumber = (string) =>
|
|
!isNaN(string) && string.match(/^[.0-9]+$/u) && !isNaN(parseFloat(string))
|
|
|
|
const SWAP_GAS_PRICE_VALIDATOR = [
|
|
{
|
|
property: 'SafeGasPrice',
|
|
type: 'string',
|
|
validator: isValidDecimalNumber,
|
|
},
|
|
{
|
|
property: 'ProposeGasPrice',
|
|
type: 'string',
|
|
validator: isValidDecimalNumber,
|
|
},
|
|
{
|
|
property: 'FastGasPrice',
|
|
type: 'string',
|
|
validator: isValidDecimalNumber,
|
|
},
|
|
]
|
|
|
|
function validateData(validators, object, urlUsed) {
|
|
return validators.every(({ property, type, validator }) => {
|
|
const types = type.split('|')
|
|
|
|
const valid =
|
|
types.some((_type) => typeof object[property] === _type) &&
|
|
(!validator || validator(object[property]))
|
|
if (!valid) {
|
|
log.error(
|
|
`response to GET ${urlUsed} invalid for property ${property}; value was:`,
|
|
object[property],
|
|
'| type was: ',
|
|
typeof object[property],
|
|
)
|
|
}
|
|
return valid
|
|
})
|
|
}
|
|
|
|
export async function fetchTradesInfo({
|
|
slippage,
|
|
sourceToken,
|
|
sourceDecimals,
|
|
destinationToken,
|
|
value,
|
|
fromAddress,
|
|
exchangeList,
|
|
}) {
|
|
const urlParams = {
|
|
destinationToken,
|
|
sourceToken,
|
|
sourceAmount: calcTokenValue(value, sourceDecimals).toString(10),
|
|
slippage,
|
|
timeout: 10000,
|
|
walletAddress: fromAddress,
|
|
}
|
|
|
|
if (exchangeList) {
|
|
urlParams.exchangeList = exchangeList
|
|
}
|
|
|
|
const queryString = new URLSearchParams(urlParams).toString()
|
|
const tradeURL = `${getBaseApi('trade')}${queryString}`
|
|
const tradesResponse = await fetchWithCache(
|
|
tradeURL,
|
|
{ method: 'GET' },
|
|
{ cacheRefreshTime: 0, timeout: 15000 },
|
|
)
|
|
const newQuotes = tradesResponse.reduce((aggIdTradeMap, quote) => {
|
|
if (
|
|
quote.trade &&
|
|
!quote.error &&
|
|
validateData(QUOTE_VALIDATORS, quote, tradeURL)
|
|
) {
|
|
const constructedTrade = constructTxParams({
|
|
to: quote.trade.to,
|
|
from: quote.trade.from,
|
|
data: quote.trade.data,
|
|
amount: decimalToHex(quote.trade.value),
|
|
gas: decimalToHex(quote.maxGas),
|
|
})
|
|
|
|
let { approvalNeeded } = quote
|
|
|
|
if (approvalNeeded) {
|
|
approvalNeeded = constructTxParams({
|
|
...approvalNeeded,
|
|
})
|
|
}
|
|
|
|
return {
|
|
...aggIdTradeMap,
|
|
[quote.aggregator]: {
|
|
...quote,
|
|
slippage,
|
|
trade: constructedTrade,
|
|
approvalNeeded,
|
|
},
|
|
}
|
|
}
|
|
return aggIdTradeMap
|
|
}, {})
|
|
|
|
return newQuotes
|
|
}
|
|
|
|
export async function fetchTokens() {
|
|
const tokenUrl = getBaseApi('tokens')
|
|
const tokens = await fetchWithCache(
|
|
tokenUrl,
|
|
{ method: 'GET' },
|
|
{ cacheRefreshTime: CACHE_REFRESH_ONE_HOUR },
|
|
)
|
|
const filteredTokens = tokens.filter((token) => {
|
|
return (
|
|
validateData(TOKEN_VALIDATORS, token, tokenUrl) &&
|
|
token.address !== ETH_SWAPS_TOKEN_OBJECT.address
|
|
)
|
|
})
|
|
filteredTokens.push(ETH_SWAPS_TOKEN_OBJECT)
|
|
return filteredTokens
|
|
}
|
|
|
|
export async function fetchAggregatorMetadata() {
|
|
const aggregatorMetadataUrl = getBaseApi('aggregatorMetadata')
|
|
const aggregators = await fetchWithCache(
|
|
aggregatorMetadataUrl,
|
|
{ method: 'GET' },
|
|
{ cacheRefreshTime: CACHE_REFRESH_ONE_HOUR },
|
|
)
|
|
const filteredAggregators = {}
|
|
for (const aggKey in aggregators) {
|
|
if (
|
|
validateData(
|
|
AGGREGATOR_METADATA_VALIDATORS,
|
|
aggregators[aggKey],
|
|
aggregatorMetadataUrl,
|
|
)
|
|
) {
|
|
filteredAggregators[aggKey] = aggregators[aggKey]
|
|
}
|
|
}
|
|
return filteredAggregators
|
|
}
|
|
|
|
export async function fetchTopAssets() {
|
|
const topAssetsUrl = getBaseApi('topAssets')
|
|
const response = await fetchWithCache(
|
|
topAssetsUrl,
|
|
{ method: 'GET' },
|
|
{ cacheRefreshTime: CACHE_REFRESH_ONE_HOUR },
|
|
)
|
|
const topAssetsMap = response.reduce((_topAssetsMap, asset, index) => {
|
|
if (validateData(TOP_ASSET_VALIDATORS, asset, topAssetsUrl)) {
|
|
return { ..._topAssetsMap, [asset.address]: { index: String(index) } }
|
|
}
|
|
return _topAssetsMap
|
|
}, {})
|
|
return topAssetsMap
|
|
}
|
|
|
|
export async function fetchSwapsFeatureLiveness() {
|
|
const status = await fetchWithCache(
|
|
getBaseApi('featureFlag'),
|
|
{ method: 'GET' },
|
|
{ cacheRefreshTime: 600000 },
|
|
)
|
|
return status?.active
|
|
}
|
|
|
|
export async function fetchTokenPrice(address) {
|
|
const query = `contract_addresses=${address}&vs_currencies=eth`
|
|
|
|
const prices = await fetchWithCache(
|
|
`https://api.coingecko.com/api/v3/simple/token_price/ethereum?${query}`,
|
|
{ method: 'GET' },
|
|
{ cacheRefreshTime: 60000 },
|
|
)
|
|
return prices && prices[address]?.eth
|
|
}
|
|
|
|
export async function fetchTokenBalance(address, userAddress) {
|
|
const tokenContract = global.eth.contract(abi).at(address)
|
|
const tokenBalancePromise = tokenContract
|
|
? tokenContract.balanceOf(userAddress)
|
|
: Promise.resolve()
|
|
const usersToken = await tokenBalancePromise
|
|
return usersToken
|
|
}
|
|
|
|
export async function fetchSwapsGasPrices() {
|
|
const gasPricesUrl = getBaseApi('gasPrices')
|
|
const response = await fetchWithCache(
|
|
gasPricesUrl,
|
|
{ method: 'GET' },
|
|
{ cacheRefreshTime: 15000 },
|
|
)
|
|
const responseIsValid = validateData(
|
|
SWAP_GAS_PRICE_VALIDATOR,
|
|
response,
|
|
gasPricesUrl,
|
|
)
|
|
|
|
if (!responseIsValid) {
|
|
throw new Error(`${gasPricesUrl} response is invalid`)
|
|
}
|
|
|
|
const {
|
|
SafeGasPrice: safeLow,
|
|
ProposeGasPrice: average,
|
|
FastGasPrice: fast,
|
|
} = response
|
|
|
|
return {
|
|
safeLow,
|
|
average,
|
|
fast,
|
|
}
|
|
}
|
|
|
|
export function getRenderableNetworkFeesForQuote(
|
|
tradeGas,
|
|
approveGas,
|
|
gasPrice,
|
|
currentCurrency,
|
|
conversionRate,
|
|
tradeValue,
|
|
sourceSymbol,
|
|
sourceAmount,
|
|
) {
|
|
const totalGasLimitForCalculation = new BigNumber(tradeGas || '0x0', 16)
|
|
.plus(approveGas || '0x0', 16)
|
|
.toString(16)
|
|
const gasTotalInWeiHex = calcGasTotal(totalGasLimitForCalculation, gasPrice)
|
|
|
|
const nonGasFee = new BigNumber(tradeValue, 16)
|
|
.minus(sourceSymbol === 'ETH' ? sourceAmount : 0, 10)
|
|
.toString(16)
|
|
|
|
const totalWeiCost = new BigNumber(gasTotalInWeiHex, 16)
|
|
.plus(nonGasFee, 16)
|
|
.toString(16)
|
|
|
|
const ethFee = getValueFromWeiHex({
|
|
value: totalWeiCost,
|
|
toDenomination: 'ETH',
|
|
numberOfDecimals: 5,
|
|
})
|
|
const rawNetworkFees = getValueFromWeiHex({
|
|
value: totalWeiCost,
|
|
toCurrency: currentCurrency,
|
|
conversionRate,
|
|
numberOfDecimals: 2,
|
|
})
|
|
const formattedNetworkFee = formatCurrency(rawNetworkFees, currentCurrency)
|
|
return {
|
|
rawNetworkFees,
|
|
rawEthFee: ethFee,
|
|
feeInFiat: formattedNetworkFee,
|
|
feeInEth: `${ethFee} ETH`,
|
|
nonGasFee,
|
|
}
|
|
}
|
|
|
|
export function quotesToRenderableData(
|
|
quotes,
|
|
gasPrice,
|
|
conversionRate,
|
|
currentCurrency,
|
|
approveGas,
|
|
tokenConversionRates,
|
|
) {
|
|
return Object.values(quotes).map((quote) => {
|
|
const {
|
|
destinationAmount = 0,
|
|
sourceAmount = 0,
|
|
sourceTokenInfo,
|
|
destinationTokenInfo,
|
|
slippage,
|
|
aggType,
|
|
aggregator,
|
|
gasEstimateWithRefund,
|
|
averageGas,
|
|
fee,
|
|
trade,
|
|
} = quote
|
|
const sourceValue = calcTokenAmount(
|
|
sourceAmount,
|
|
sourceTokenInfo.decimals || 18,
|
|
).toString(10)
|
|
const destinationValue = calcTokenAmount(
|
|
destinationAmount,
|
|
destinationTokenInfo.decimals || 18,
|
|
).toPrecision(8)
|
|
|
|
const {
|
|
feeInFiat,
|
|
rawNetworkFees,
|
|
rawEthFee,
|
|
feeInEth,
|
|
} = getRenderableNetworkFeesForQuote(
|
|
gasEstimateWithRefund || decimalToHex(averageGas || 800000),
|
|
approveGas,
|
|
gasPrice,
|
|
currentCurrency,
|
|
conversionRate,
|
|
trade.value,
|
|
sourceTokenInfo.symbol,
|
|
sourceAmount,
|
|
)
|
|
|
|
const slippageMultiplier = new BigNumber(100 - slippage).div(100)
|
|
const minimumAmountReceived = new BigNumber(destinationValue)
|
|
.times(slippageMultiplier)
|
|
.toFixed(6)
|
|
|
|
const tokenConversionRate =
|
|
tokenConversionRates[destinationTokenInfo.address]
|
|
const ethValueOfTrade =
|
|
destinationTokenInfo.symbol === 'ETH'
|
|
? calcTokenAmount(
|
|
destinationAmount,
|
|
destinationTokenInfo.decimals || 18,
|
|
).minus(rawEthFee, 10)
|
|
: new BigNumber(tokenConversionRate || 0, 10)
|
|
.times(
|
|
calcTokenAmount(
|
|
destinationAmount,
|
|
destinationTokenInfo.decimals || 18,
|
|
),
|
|
10,
|
|
)
|
|
.minus(rawEthFee, 10)
|
|
|
|
let liquiditySourceKey
|
|
let renderedSlippage = slippage
|
|
|
|
if (aggType === 'AGG') {
|
|
liquiditySourceKey = 'swapAggregator'
|
|
} else if (aggType === 'RFQ') {
|
|
liquiditySourceKey = 'swapRequestForQuotation'
|
|
renderedSlippage = 0
|
|
} else if (aggType === 'DEX') {
|
|
liquiditySourceKey = 'swapDecentralizedExchange'
|
|
} else {
|
|
liquiditySourceKey = 'swapUnknown'
|
|
}
|
|
|
|
return {
|
|
aggId: aggregator,
|
|
amountReceiving: `${destinationValue} ${destinationTokenInfo.symbol}`,
|
|
destinationTokenDecimals: destinationTokenInfo.decimals,
|
|
destinationTokenSymbol: destinationTokenInfo.symbol,
|
|
destinationTokenValue: formatSwapsValueForDisplay(destinationValue),
|
|
destinationIconUrl: destinationTokenInfo.iconUrl,
|
|
isBestQuote: quote.isBestQuote,
|
|
liquiditySourceKey,
|
|
feeInEth,
|
|
detailedNetworkFees: `${feeInEth} (${feeInFiat})`,
|
|
networkFees: feeInFiat,
|
|
quoteSource: aggType,
|
|
rawNetworkFees,
|
|
slippage: renderedSlippage,
|
|
sourceTokenDecimals: sourceTokenInfo.decimals,
|
|
sourceTokenSymbol: sourceTokenInfo.symbol,
|
|
sourceTokenValue: sourceValue,
|
|
sourceTokenIconUrl: sourceTokenInfo.iconUrl,
|
|
ethValueOfTrade,
|
|
minimumAmountReceived,
|
|
metaMaskFee: fee,
|
|
}
|
|
})
|
|
}
|
|
|
|
export function getSwapsTokensReceivedFromTxMeta(
|
|
tokenSymbol,
|
|
txMeta,
|
|
tokenAddress,
|
|
accountAddress,
|
|
tokenDecimals,
|
|
approvalTxMeta,
|
|
) {
|
|
const txReceipt = txMeta?.txReceipt
|
|
if (tokenSymbol === 'ETH') {
|
|
if (
|
|
!txReceipt ||
|
|
!txMeta ||
|
|
!txMeta.postTxBalance ||
|
|
!txMeta.preTxBalance
|
|
) {
|
|
return null
|
|
}
|
|
|
|
let approvalTxGasCost = '0x0'
|
|
if (approvalTxMeta && approvalTxMeta.txReceipt) {
|
|
approvalTxGasCost = calcGasTotal(
|
|
approvalTxMeta.txReceipt.gasUsed,
|
|
approvalTxMeta.txParams.gasPrice,
|
|
)
|
|
}
|
|
|
|
const gasCost = calcGasTotal(txReceipt.gasUsed, txMeta.txParams.gasPrice)
|
|
const totalGasCost = new BigNumber(gasCost, 16)
|
|
.plus(approvalTxGasCost, 16)
|
|
.toString(16)
|
|
|
|
const preTxBalanceLessGasCost = subtractCurrencies(
|
|
txMeta.preTxBalance,
|
|
totalGasCost,
|
|
{
|
|
aBase: 16,
|
|
bBase: 16,
|
|
toNumericBase: 'hex',
|
|
},
|
|
)
|
|
|
|
const ethReceived = subtractCurrencies(
|
|
txMeta.postTxBalance,
|
|
preTxBalanceLessGasCost,
|
|
{
|
|
aBase: 16,
|
|
bBase: 16,
|
|
fromDenomination: 'WEI',
|
|
toDenomination: 'ETH',
|
|
toNumericBase: 'dec',
|
|
numberOfDecimals: 6,
|
|
},
|
|
)
|
|
return ethReceived
|
|
}
|
|
const txReceiptLogs = txReceipt?.logs
|
|
if (txReceiptLogs && txReceipt?.status !== '0x0') {
|
|
const tokenTransferLog = txReceiptLogs.find((txReceiptLog) => {
|
|
const isTokenTransfer =
|
|
txReceiptLog.topics &&
|
|
txReceiptLog.topics[0] === TOKEN_TRANSFER_LOG_TOPIC_HASH
|
|
const isTransferFromGivenToken = txReceiptLog.address === tokenAddress
|
|
const isTransferFromGivenAddress =
|
|
txReceiptLog.topics &&
|
|
txReceiptLog.topics[2] &&
|
|
txReceiptLog.topics[2].match(accountAddress.slice(2))
|
|
return (
|
|
isTokenTransfer &&
|
|
isTransferFromGivenToken &&
|
|
isTransferFromGivenAddress
|
|
)
|
|
})
|
|
return tokenTransferLog
|
|
? toPrecisionWithoutTrailingZeros(
|
|
calcTokenAmount(tokenTransferLog.data, tokenDecimals).toString(10),
|
|
6,
|
|
)
|
|
: ''
|
|
}
|
|
return null
|
|
}
|
|
|
|
export function formatSwapsValueForDisplay(destinationAmount) {
|
|
let amountToDisplay = toPrecisionWithoutTrailingZeros(destinationAmount, 12)
|
|
if (amountToDisplay.match(/e[+-]/u)) {
|
|
amountToDisplay = new BigNumber(amountToDisplay).toFixed()
|
|
}
|
|
return amountToDisplay
|
|
}
|
|
|