mirror of
https://github.com/kremalicious/metamask-extension.git
synced 2024-12-23 09:52:26 +01:00
5ee1291662
Previously all browser globals were allowed to be used anywhere by ESLint because we had set the `env` property to `browser` in the ESLint config. This has made it easy to accidentally use browser globals (e.g. #8338), so it has been removed. Instead we now have a short list of allowed globals. All browser globals are now accessed as properties on `window`. Unfortunately this change resulted in a few different confusing unit test errors, as some of our unit tests setup assumed that a particular global would be used via `window` or `global`. In particular, `window.fetch` didn't work correctly because it wasn't patched by the AbortController polyfill (only `global.fetch` was being patched). The `jsdom-global` package we were using complicated matters by setting all of the JSDOM `window` properties directly on `global`, overwriting the `AbortController` for example. The `helpers.js` test setup module has been simplified somewhat by removing `jsdom-global` and constructing the JSDOM instance manually. The JSDOM window is set on `window`, and a few properties are set on `global` as well as needed by various dependencies. `node-fetch` and the AbortController polyfill/patch now work as expected as well, though `fetch` is only available on `window` now.
91 lines
2.5 KiB
JavaScript
91 lines
2.5 KiB
JavaScript
import ObservableStore from 'obs-store'
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import log from 'loglevel'
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import { normalize as normalizeAddress } from 'eth-sig-util'
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import ethUtil from 'ethereumjs-util'
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// By default, poll every 3 minutes
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const DEFAULT_INTERVAL = 180 * 1000
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/**
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* A controller that polls for token exchange
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* rates based on a user's current token list
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*/
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class TokenRatesController {
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/**
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* Creates a TokenRatesController
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*
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* @param {Object} [config] - Options to configure controller
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*/
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constructor ({ interval = DEFAULT_INTERVAL, currency, preferences } = {}) {
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this.store = new ObservableStore()
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this.currency = currency
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this.preferences = preferences
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this.interval = interval
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}
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/**
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* Updates exchange rates for all tokens
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*/
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async updateExchangeRates () {
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if (!this.isActive) {
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return
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}
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const contractExchangeRates = {}
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const nativeCurrency = this.currency ? this.currency.state.nativeCurrency.toLowerCase() : 'eth'
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const pairs = this._tokens.map((token) => token.address).join(',')
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const query = `contract_addresses=${pairs}&vs_currencies=${nativeCurrency}`
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if (this._tokens.length > 0) {
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try {
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const response = await window.fetch(`https://api.coingecko.com/api/v3/simple/token_price/ethereum?${query}`)
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const prices = await response.json()
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this._tokens.forEach((token) => {
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const price = prices[token.address.toLowerCase()] || prices[ethUtil.toChecksumAddress(token.address)]
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contractExchangeRates[normalizeAddress(token.address)] = price ? price[nativeCurrency] : 0
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})
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} catch (error) {
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log.warn(`MetaMask - TokenRatesController exchange rate fetch failed.`, error)
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}
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}
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this.store.putState({ contractExchangeRates })
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}
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/**
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* @type {Number}
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*/
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set interval (interval) {
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this._handle && clearInterval(this._handle)
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if (!interval) {
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return
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}
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this._handle = setInterval(() => {
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this.updateExchangeRates()
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}, interval)
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}
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/**
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* @type {Object}
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*/
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set preferences (preferences) {
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this._preferences && this._preferences.unsubscribe()
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if (!preferences) {
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return
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}
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this._preferences = preferences
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this.tokens = preferences.getState().tokens
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preferences.subscribe(({ tokens = [] }) => {
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this.tokens = tokens
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})
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}
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/**
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* @type {Array}
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*/
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set tokens (tokens) {
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this._tokens = tokens
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this.updateExchangeRates()
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}
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}
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export default TokenRatesController
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