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135 lines
3.2 KiB
135 lines
3.2 KiB
/*global Web3*/
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// TODO:deprecate:2020
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// Delete this file
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import 'web3/dist/web3.min'
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const shouldLogUsage = !([
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'docs.metamask.io',
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'metamask.github.io',
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'metamask.io',
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].includes(window.location.hostname))
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export default function setupWeb3 (log) {
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// export web3 as a global, checking for usage
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let reloadInProgress = false
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let lastTimeUsed
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let lastSeenNetwork
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let hasBeenWarned = false
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const web3 = new Web3(window.ethereum)
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web3.setProvider = function () {
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log.debug('MetaMask - overrode web3.setProvider')
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}
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log.debug('MetaMask - injected web3')
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Object.defineProperty(window.ethereum, '_web3Ref', {
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enumerable: false,
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writable: true,
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configurable: true,
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value: web3.eth,
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})
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const web3Proxy = new Proxy(web3, {
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get: (_web3, key) => {
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// get the time of use
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lastTimeUsed = Date.now()
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// show warning once on web3 access
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if (!hasBeenWarned) {
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console.warn(`MetaMask: We will stop injecting web3 in Q4 2020.\nPlease see this article for more information: https://medium.com/metamask/no-longer-injecting-web3-js-4a899ad6e59e`)
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hasBeenWarned = true
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}
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if (shouldLogUsage) {
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const name = stringifyKey(key)
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window.ethereum.request({
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method: 'metamask_logInjectedWeb3Usage',
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params: [{ action: 'get', name }],
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})
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}
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// return value normally
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return _web3[key]
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},
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set: (_web3, key, value) => {
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const name = stringifyKey(key)
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if (shouldLogUsage) {
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window.ethereum.request({
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method: 'metamask_logInjectedWeb3Usage',
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params: [{ action: 'set', name }],
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})
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}
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// set value normally
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_web3[key] = value
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},
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})
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Object.defineProperty(global, 'web3', {
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enumerable: false,
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writable: true,
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configurable: true,
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value: web3Proxy,
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})
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window.ethereum._publicConfigStore.subscribe((state) => {
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// if the auto refresh on network change is false do not
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// do anything
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if (!window.ethereum.autoRefreshOnNetworkChange) {
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return
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}
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// if reload in progress, no need to check reload logic
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if (reloadInProgress) {
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return
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}
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const currentNetwork = state.networkVersion
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// set the initial network
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if (!lastSeenNetwork) {
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lastSeenNetwork = currentNetwork
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return
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}
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// skip reload logic if web3 not used
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if (!lastTimeUsed) {
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return
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}
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// if network did not change, exit
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if (currentNetwork === lastSeenNetwork) {
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return
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}
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// initiate page reload
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reloadInProgress = true
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const timeSinceUse = Date.now() - lastTimeUsed
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// if web3 was recently used then delay the reloading of the page
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if (timeSinceUse > 500) {
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triggerReset()
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} else {
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setTimeout(triggerReset, 500)
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}
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})
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}
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// reload the page
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function triggerReset () {
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global.location.reload()
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}
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/**
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* Returns a "stringified" key. Keys that are already strings are returned
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* unchanged, and any non-string values are returned as "typeof <type>".
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*
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* @param {any} key - The key to stringify
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*/
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function stringifyKey (key) {
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return typeof key === 'string'
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? key
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: `typeof ${typeof key}`
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}
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