mirror of
https://github.com/kremalicious/metamask-extension.git
synced 2024-12-23 09:52:26 +01:00
375 lines
13 KiB
JavaScript
375 lines
13 KiB
JavaScript
import { merge, omit } from 'lodash';
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import { ObservableStore } from '@metamask/obs-store';
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import { bufferToHex, keccak } from 'ethereumjs-util';
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import { ENVIRONMENT_TYPE_BACKGROUND } from '../../../shared/constants/app';
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import {
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METAMETRICS_ANONYMOUS_ID,
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METAMETRICS_BACKGROUND_PAGE_OBJECT,
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} from '../../../shared/constants/metametrics';
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/**
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* Used to determine whether or not to attach a user's metametrics id
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* to events that include on-chain data. This helps to prevent identifying
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* a user by being able to trace their activity on etherscan/block exploring
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*/
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const trackableSendCounts = {
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1: true,
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10: true,
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30: true,
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50: true,
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100: true,
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250: true,
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500: true,
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1000: true,
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2500: true,
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5000: true,
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10000: true,
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25000: true,
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};
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export function sendCountIsTrackable(sendCount) {
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return Boolean(trackableSendCounts[sendCount]);
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}
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/**
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* @typedef {import('../../../shared/constants/metametrics').MetaMetricsContext} MetaMetricsContext
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* @typedef {import('../../../shared/constants/metametrics').MetaMetricsEventPayload} MetaMetricsEventPayload
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* @typedef {import('../../../shared/constants/metametrics').MetaMetricsEventOptions} MetaMetricsEventOptions
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* @typedef {import('../../../shared/constants/metametrics').SegmentEventPayload} SegmentEventPayload
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* @typedef {import('../../../shared/constants/metametrics').SegmentInterface} SegmentInterface
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* @typedef {import('../../../shared/constants/metametrics').MetaMetricsPagePayload} MetaMetricsPagePayload
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* @typedef {import('../../../shared/constants/metametrics').MetaMetricsPageOptions} MetaMetricsPageOptions
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*/
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/**
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* @typedef {Object} MetaMetricsControllerState
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* @property {?string} metaMetricsId - The user's metaMetricsId that will be
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* attached to all non-anonymized event payloads
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* @property {?boolean} participateInMetaMetrics - The user's preference for
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* participating in the MetaMetrics analytics program. This setting controls
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* whether or not events are tracked
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* @property {number} metaMetricsSendCount - How many send transactions have
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* been tracked through this controller. Used to prevent attaching sensitive
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* data that can be traced through on chain data.
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*/
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export default class MetaMetricsController {
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/**
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* @param {Object} segment - an instance of analytics-node for tracking
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* events that conform to the new MetaMetrics tracking plan.
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* @param {Object} preferencesStore - The preferences controller store, used
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* to access and subscribe to preferences that will be attached to events
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* @param {function} onNetworkDidChange - Used to attach a listener to the
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* networkDidChange event emitted by the networkController
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* @param {function} getCurrentChainId - Gets the current chain id from the
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* network controller
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* @param {function} getNetworkIdentifier - Gets the current network
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* identifier from the network controller
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* @param {string} version - The version of the extension
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* @param {string} environment - The environment the extension is running in
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* @param {MetaMetricsControllerState} initState - State to initialized with
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*/
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constructor({
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segment,
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preferencesStore,
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onNetworkDidChange,
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getCurrentChainId,
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getNetworkIdentifier,
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version,
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environment,
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initState,
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}) {
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const prefState = preferencesStore.getState();
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this.chainId = getCurrentChainId();
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this.network = getNetworkIdentifier();
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this.locale = prefState.currentLocale.replace('_', '-');
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this.version =
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environment === 'production' ? version : `${version}-${environment}`;
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this.store = new ObservableStore({
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participateInMetaMetrics: null,
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metaMetricsId: null,
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metaMetricsSendCount: 0,
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...initState,
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});
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preferencesStore.subscribe(({ currentLocale }) => {
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this.locale = currentLocale.replace('_', '-');
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});
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onNetworkDidChange(() => {
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this.chainId = getCurrentChainId();
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this.network = getNetworkIdentifier();
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});
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this.segment = segment;
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}
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generateMetaMetricsId() {
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return bufferToHex(
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keccak(
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Buffer.from(
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String(Date.now()) +
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String(Math.round(Math.random() * Number.MAX_SAFE_INTEGER)),
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),
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),
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);
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}
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/**
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* Setter for the `participateInMetaMetrics` property
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*
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* @param {boolean} participateInMetaMetrics - Whether or not the user wants
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* to participate in MetaMetrics
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* @returns {string|null} the string of the new metametrics id, or null
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* if not set
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*/
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setParticipateInMetaMetrics(participateInMetaMetrics) {
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let { metaMetricsId } = this.state;
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if (participateInMetaMetrics && !metaMetricsId) {
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metaMetricsId = this.generateMetaMetricsId();
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} else if (participateInMetaMetrics === false) {
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metaMetricsId = null;
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}
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this.store.updateState({ participateInMetaMetrics, metaMetricsId });
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return metaMetricsId;
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}
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get state() {
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return this.store.getState();
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}
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setMetaMetricsSendCount(val) {
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this.store.updateState({ metaMetricsSendCount: val });
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}
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/**
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* Build the context object to attach to page and track events.
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* @private
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* @param {Pick<MetaMetricsContext, 'referrer'>} [referrer] - dapp origin that initialized
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* the notification window.
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* @param {Pick<MetaMetricsContext, 'page'>} [page] - page object describing the current
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* view of the extension. Defaults to the background-process object.
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* @returns {MetaMetricsContext}
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*/
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_buildContext(referrer, page = METAMETRICS_BACKGROUND_PAGE_OBJECT) {
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return {
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app: {
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name: 'MetaMask Extension',
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version: this.version,
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},
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userAgent: window.navigator.userAgent,
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page,
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referrer,
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};
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}
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/**
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* Build's the event payload, processing all fields into a format that can be
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* fed to Segment's track method
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* @private
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* @param {
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* Omit<MetaMetricsEventPayload, 'sensitiveProperties'>
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* } rawPayload - raw payload provided to trackEvent
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* @returns {SegmentEventPayload} - formatted event payload for segment
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*/
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_buildEventPayload(rawPayload) {
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const {
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event,
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properties,
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revenue,
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value,
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currency,
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category,
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page,
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referrer,
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environmentType = ENVIRONMENT_TYPE_BACKGROUND,
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} = rawPayload;
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return {
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event,
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properties: {
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// These values are omitted from properties because they have special meaning
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// in segment. https://segment.com/docs/connections/spec/track/#properties.
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// to avoid accidentally using these inappropriately, you must add them as top
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// level properties on the event payload. We also exclude locale to prevent consumers
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// from overwriting this context level property. We track it as a property
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// because not all destinations map locale from context.
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...omit(properties, ['revenue', 'locale', 'currency', 'value']),
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revenue,
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value,
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currency,
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category,
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network: properties?.network ?? this.network,
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locale: this.locale,
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chain_id: properties?.chain_id ?? this.chainId,
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environment_type: environmentType,
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},
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context: this._buildContext(referrer, page),
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};
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}
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/**
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* Perform validation on the payload and update the id type to use before
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* sending to Segment. Also examines the options to route and handle the
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* event appropriately.
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* @private
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* @param {SegmentEventPayload} payload - properties to attach to event
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* @param {MetaMetricsEventOptions} [options] - options for routing and
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* handling the event
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* @returns {Promise<void>}
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*/
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_track(payload, options) {
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const {
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isOptIn,
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metaMetricsId: metaMetricsIdOverride,
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matomoEvent,
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flushImmediately,
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} = options || {};
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let idType = 'userId';
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let idValue = this.state.metaMetricsId;
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let excludeMetaMetricsId = options?.excludeMetaMetricsId ?? false;
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// This is carried over from the old implementation, and will likely need
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// to be updated to work with the new tracking plan. I think we should use
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// a config setting for this instead of trying to match the event name
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const isSendFlow = Boolean(payload.event.match(/^send|^confirm/iu));
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if (
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isSendFlow &&
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this.state.metaMetricsSendCount &&
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!sendCountIsTrackable(this.state.metaMetricsSendCount + 1)
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) {
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excludeMetaMetricsId = true;
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}
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// If we are tracking sensitive data we will always use the anonymousId
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// property as well as our METAMETRICS_ANONYMOUS_ID. This prevents us from
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// associating potentially identifiable information with a specific id.
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// During the opt in flow we will track all events, but do so with the
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// anonymous id. The one exception to that rule is after the user opts in
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// to MetaMetrics. When that happens we receive back the user's new
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// MetaMetrics id before it is fully persisted to state. To avoid a race
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// condition we explicitly pass the new id to the track method. In that
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// case we will track the opt in event to the user's id. In all other cases
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// we use the metaMetricsId from state.
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if (excludeMetaMetricsId || (isOptIn && !metaMetricsIdOverride)) {
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idType = 'anonymousId';
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idValue = METAMETRICS_ANONYMOUS_ID;
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} else if (isOptIn && metaMetricsIdOverride) {
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idValue = metaMetricsIdOverride;
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}
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payload[idType] = idValue;
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// If this is an event on the old matomo schema, add a key to the payload
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// to designate it as such
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if (matomoEvent === true) {
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payload.properties.legacy_event = true;
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}
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// Promises will only resolve when the event is sent to segment. For any
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// event that relies on this promise being fulfilled before performing UI
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// updates, or otherwise delaying user interaction, supply the
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// 'flushImmediately' flag to the trackEvent method.
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return new Promise((resolve, reject) => {
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const callback = (err) => {
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if (err) {
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// The error that segment gives us has some manipulation done to it
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// that seemingly breaks with lockdown enabled. Creating a new error
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// here prevents the system from freezing when the network request to
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// segment fails for any reason.
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const safeError = new Error(err.message);
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safeError.stack = err.stack;
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return reject(safeError);
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}
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return resolve();
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};
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this.segment.track(payload, callback);
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if (flushImmediately) {
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this.segment.flush();
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}
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});
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}
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/**
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* track a page view with Segment
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* @param {MetaMetricsPagePayload} payload - details of the page viewed
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* @param {MetaMetricsPageOptions} [options] - options for handling the page
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* view
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*/
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trackPage({ name, params, environmentType, page, referrer }, options) {
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if (this.state.participateInMetaMetrics === false) {
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return;
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}
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if (this.state.participateInMetaMetrics === null && !options?.isOptInPath) {
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return;
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}
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const { metaMetricsId } = this.state;
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const idTrait = metaMetricsId ? 'userId' : 'anonymousId';
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const idValue = metaMetricsId ?? METAMETRICS_ANONYMOUS_ID;
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this.segment.page({
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[idTrait]: idValue,
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name,
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properties: {
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params,
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locale: this.locale,
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network: this.network,
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chain_id: this.chainId,
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environment_type: environmentType,
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},
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context: this._buildContext(referrer, page),
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});
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}
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/**
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* track a metametrics event, performing necessary payload manipulation and
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* routing the event to the appropriate segment source. Will split events
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* with sensitiveProperties into two events, tracking the sensitiveProperties
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* with the anonymousId only.
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* @param {MetaMetricsEventPayload} payload - details of the event
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* @param {MetaMetricsEventOptions} [options] - options for handling/routing the event
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* @returns {Promise<void>}
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*/
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async trackEvent(payload, options) {
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// event and category are required fields for all payloads
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if (!payload.event || !payload.category) {
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throw new Error('Must specify event and category.');
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}
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if (!this.state.participateInMetaMetrics && !options?.isOptIn) {
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return;
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}
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// We might track multiple events if sensitiveProperties is included, this array will hold
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// the promises returned from this._track.
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const events = [];
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if (payload.sensitiveProperties) {
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// sensitiveProperties will only be tracked using the anonymousId property and generic id
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// If the event options already specify to exclude the metaMetricsId we throw an error as
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// a signal to the developer that the event was implemented incorrectly
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if (options?.excludeMetaMetricsId === true) {
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throw new Error(
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'sensitiveProperties was specified in an event payload that also set the excludeMetaMetricsId flag',
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);
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}
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const combinedProperties = merge(
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payload.sensitiveProperties,
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payload.properties,
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);
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events.push(
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this._track(
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this._buildEventPayload({
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...payload,
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properties: combinedProperties,
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}),
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{ ...options, excludeMetaMetricsId: true },
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),
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);
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}
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events.push(this._track(this._buildEventPayload(payload), options));
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await Promise.all(events);
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}
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}
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