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metamask-extension/app/scripts/controllers/network/network.js

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import { strict as assert } from 'assert';
import EventEmitter from 'events';
import { ComposedStore, ObservableStore } from '@metamask/obs-store';
import { JsonRpcEngine } from 'json-rpc-engine';
import { providerFromEngine } from 'eth-json-rpc-middleware';
import log from 'loglevel';
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import {
createSwappableProxy,
createEventEmitterProxy,
} from 'swappable-obj-proxy';
import EthQuery from 'eth-query';
import {
RINKEBY,
MAINNET,
INFURA_PROVIDER_TYPES,
NETWORK_TYPE_RPC,
NETWORK_TYPE_TO_ID_MAP,
MAINNET_CHAIN_ID,
RINKEBY_CHAIN_ID,
INFURA_BLOCKED_KEY,
TEST_NETWORK_TICKER_MAP,
} from '../../../../shared/constants/network';
import { SECOND } from '../../../../shared/constants/time';
import {
isPrefixedFormattedHexString,
isSafeChainId,
} from '../../../../shared/modules/network.utils';
import getFetchWithTimeout from '../../../../shared/modules/fetch-with-timeout';
import createMetamaskMiddleware from './createMetamaskMiddleware';
import createInfuraClient from './createInfuraClient';
import createJsonRpcClient from './createJsonRpcClient';
const env = process.env.METAMASK_ENV;
const fetchWithTimeout = getFetchWithTimeout(SECOND * 30);
let defaultProviderConfigOpts;
if (process.env.IN_TEST) {
defaultProviderConfigOpts = {
type: NETWORK_TYPE_RPC,
rpcUrl: 'http://localhost:8545',
chainId: '0x539',
nickname: 'Localhost 8545',
};
} else if (process.env.METAMASK_DEBUG || env === 'test') {
defaultProviderConfigOpts = {
type: RINKEBY,
chainId: RINKEBY_CHAIN_ID,
ticker: TEST_NETWORK_TICKER_MAP.rinkeby,
};
} else {
defaultProviderConfigOpts = { type: MAINNET, chainId: MAINNET_CHAIN_ID };
}
const defaultProviderConfig = {
ticker: 'ETH',
...defaultProviderConfigOpts,
};
const defaultNetworkDetailsState = {
EIPS: { 1559: undefined },
};
export const NETWORK_EVENTS = {
// Fired after the actively selected network is changed
NETWORK_DID_CHANGE: 'networkDidChange',
// Fired when the actively selected network *will* change
NETWORK_WILL_CHANGE: 'networkWillChange',
// Fired when Infura returns an error indicating no support
INFURA_IS_BLOCKED: 'infuraIsBlocked',
// Fired when not using an Infura network or when Infura returns no error, indicating support
INFURA_IS_UNBLOCKED: 'infuraIsUnblocked',
};
export default class NetworkController extends EventEmitter {
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constructor(opts = {}) {
super();
// create stores
this.providerStore = new ObservableStore(
opts.provider || { ...defaultProviderConfig },
);
this.previousProviderStore = new ObservableStore(
this.providerStore.getState(),
);
this.networkStore = new ObservableStore('loading');
// We need to keep track of a few details about the current network
// Ideally we'd merge this.networkStore with this new store, but doing so
// will require a decent sized refactor of how we're accessing network
// state. Currently this is only used for detecting EIP 1559 support but
// can be extended to track other network details.
this.networkDetails = new ObservableStore(
opts.networkDetails || {
...defaultNetworkDetailsState,
},
);
this.store = new ComposedStore({
provider: this.providerStore,
previousProviderStore: this.previousProviderStore,
network: this.networkStore,
networkDetails: this.networkDetails,
});
// provider and block tracker
this._provider = null;
this._blockTracker = null;
// provider and block tracker proxies - because the network changes
this._providerProxy = null;
this._blockTrackerProxy = null;
this.on(NETWORK_EVENTS.NETWORK_DID_CHANGE, this.lookupNetwork);
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}
/**
* Sets the Infura project ID
*
* @param {string} projectId - The Infura project ID
* @throws {Error} If the project ID is not a valid string.
*/
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setInfuraProjectId(projectId) {
if (!projectId || typeof projectId !== 'string') {
throw new Error('Invalid Infura project ID');
}
this._infuraProjectId = projectId;
}
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initializeProvider(providerParams) {
this._baseProviderParams = providerParams;
const { type, rpcUrl, chainId } = this.getProviderConfig();
this._configureProvider({ type, rpcUrl, chainId });
this.lookupNetwork();
}
// return the proxies so the references will always be good
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getProviderAndBlockTracker() {
const provider = this._providerProxy;
const blockTracker = this._blockTrackerProxy;
return { provider, blockTracker };
}
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/**
* Method to return the latest block for the current network
*
* @returns {Object} Block header
*/
getLatestBlock() {
return new Promise((resolve, reject) => {
const { provider } = this.getProviderAndBlockTracker();
const ethQuery = new EthQuery(provider);
ethQuery.sendAsync(
{ method: 'eth_getBlockByNumber', params: ['latest', false] },
(err, block) => {
if (err) {
return reject(err);
}
return resolve(block);
},
);
});
}
/**
* Method to check if the block header contains fields that indicate EIP 1559
* support (baseFeePerGas).
*
* @returns {Promise<boolean>} true if current network supports EIP 1559
*/
async getEIP1559Compatibility() {
const { EIPS } = this.networkDetails.getState();
if (EIPS[1559] !== undefined) {
return EIPS[1559];
}
const latestBlock = await this.getLatestBlock();
const supportsEIP1559 =
latestBlock && latestBlock.baseFeePerGas !== undefined;
this.setNetworkEIPSupport(1559, supportsEIP1559);
return supportsEIP1559;
}
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verifyNetwork() {
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// Check network when restoring connectivity:
if (this.isNetworkLoading()) {
this.lookupNetwork();
}
}
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getNetworkState() {
return this.networkStore.getState();
}
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setNetworkState(network) {
this.networkStore.putState(network);
}
/**
* Set EIP support indication in the networkDetails store
*
* @param {number} EIPNumber - The number of the EIP to mark support for
* @param {boolean} isSupported - True if the EIP is supported
*/
setNetworkEIPSupport(EIPNumber, isSupported) {
this.networkDetails.updateState({
EIPS: {
[EIPNumber]: isSupported,
},
});
}
/**
* Reset EIP support to default (no support)
*/
clearNetworkDetails() {
this.networkDetails.putState({ ...defaultNetworkDetailsState });
}
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isNetworkLoading() {
return this.getNetworkState() === 'loading';
}
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lookupNetwork() {
// Prevent firing when provider is not defined.
if (!this._provider) {
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log.warn(
'NetworkController - lookupNetwork aborted due to missing provider',
);
return;
}
const chainId = this.getCurrentChainId();
if (!chainId) {
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log.warn(
'NetworkController - lookupNetwork aborted due to missing chainId',
);
this.setNetworkState('loading');
// keep network details in sync with network state
this.clearNetworkDetails();
return;
}
// Ping the RPC endpoint so we can confirm that it works
const ethQuery = new EthQuery(this._provider);
const initialNetwork = this.getNetworkState();
const { type } = this.getProviderConfig();
const isInfura = INFURA_PROVIDER_TYPES.includes(type);
if (isInfura) {
this._checkInfuraAvailability(type);
} else {
this.emit(NETWORK_EVENTS.INFURA_IS_UNBLOCKED);
}
ethQuery.sendAsync({ method: 'net_version' }, (err, networkVersion) => {
const currentNetwork = this.getNetworkState();
if (initialNetwork === currentNetwork) {
if (err) {
this.setNetworkState('loading');
// keep network details in sync with network state
this.clearNetworkDetails();
return;
}
this.setNetworkState(networkVersion);
// look up EIP-1559 support
this.getEIP1559Compatibility();
}
});
}
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getCurrentChainId() {
const { type, chainId: configChainId } = this.getProviderConfig();
return NETWORK_TYPE_TO_ID_MAP[type]?.chainId || configChainId;
}
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setRpcTarget(rpcUrl, chainId, ticker = 'ETH', nickname = '', rpcPrefs) {
assert.ok(
isPrefixedFormattedHexString(chainId),
`Invalid chain ID "${chainId}": invalid hex string.`,
);
assert.ok(
isSafeChainId(parseInt(chainId, 16)),
`Invalid chain ID "${chainId}": numerical value greater than max safe value.`,
);
this.setProviderConfig({
type: NETWORK_TYPE_RPC,
rpcUrl,
chainId,
ticker,
nickname,
New settings custom rpc form (#6490) * Add networks tab to settings, with header. * Adds network list to settings network tab. * Adds form to settings networks tab and connects it to network list. * Network tab: form adding and editing working * Settings network form properly handles input errors * Add translations for settings network form * Clean up styles of settings network tab. * Add popup-view styles and behaviour to settings network tab. * Fix save button on settings network form * Adds 'Add Network' button and addMode to settings networks tab * Lint fix for settings networks tab addition * Fix navigation in settings networks tab. * Editing an rpcurl in networks tab does not create new network, just changes rpc of old * Fix layout of settings tabs other than network * Networks dropdown 'Custom Rpc' item links to networks tab in settings. * Update settings sidebar networks subheader. * Make networks tab buttons width consistent with input widths in extension view. * Fix settings screen subheader height in popup view * Fix height of add networks button in popup view * Add optional label to chainId and symbol form labels in networks setting tab * Style fixes for networks tab headers * Add ability to customize block explorer used by custom rpc * Stylistic improvements+fixes to custom rpc form. * Hide cancel button. * Highlight and show network form of provider by default. * Standardize network subheader name to 'Networks' * Update e2e tests for new settings network form * Update unit tests for new rpcPrefs prop * Extract blockexplorer url construction into method. * Fix broken styles on non-network tabs in popup mode * Fix block explorer url links for cases when provider in state has not been updated. * Fix vertical spacing of network form * Don't allow click of save button on network form if nothing has changed * Ensure add network button is shown in popup view * Lint fix for networks tab * Fix block explorer url preference setting. * Fix e2e tests for custom blockexplorer in account details modal changes. * Update integration test states to include frequentRpcList property * Fix some capitalizations in en/messages.json * Remove some console.logs added during custom rpc form work * Fix external account link text and url for modal and dropdown. * Documentation, url validation, proptype required additions and lint fixes on network tab and form.
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rpcPrefs,
});
}
async setProviderType(type) {
assert.notStrictEqual(
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type,
NETWORK_TYPE_RPC,
`NetworkController - cannot call "setProviderType" with type "${NETWORK_TYPE_RPC}". Use "setRpcTarget"`,
);
assert.ok(
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INFURA_PROVIDER_TYPES.includes(type),
`Unknown Infura provider type "${type}".`,
);
const { chainId, ticker } = NETWORK_TYPE_TO_ID_MAP[type];
this.setProviderConfig({
type,
rpcUrl: '',
chainId,
ticker: ticker ?? 'ETH',
nickname: '',
});
}
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resetConnection() {
this.setProviderConfig(this.getProviderConfig());
}
/**
* Sets the provider config and switches the network.
*
* @param config
*/
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setProviderConfig(config) {
this.previousProviderStore.updateState(this.getProviderConfig());
this.providerStore.updateState(config);
this._switchNetwork(config);
}
rollbackToPreviousProvider() {
const config = this.previousProviderStore.getState();
this.providerStore.updateState(config);
this._switchNetwork(config);
}
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getProviderConfig() {
return this.providerStore.getState();
}
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getNetworkIdentifier() {
const provider = this.providerStore.getState();
return provider.type === NETWORK_TYPE_RPC ? provider.rpcUrl : provider.type;
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}
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//
// Private
//
async _checkInfuraAvailability(network) {
const rpcUrl = `https://${network}.infura.io/v3/${this._infuraProjectId}`;
let networkChanged = false;
this.once(NETWORK_EVENTS.NETWORK_DID_CHANGE, () => {
networkChanged = true;
});
try {
const response = await fetchWithTimeout(rpcUrl, {
method: 'POST',
body: JSON.stringify({
jsonrpc: '2.0',
method: 'eth_blockNumber',
params: [],
id: 1,
}),
});
if (networkChanged) {
return;
}
if (response.ok) {
this.emit(NETWORK_EVENTS.INFURA_IS_UNBLOCKED);
} else {
const responseMessage = await response.json();
if (networkChanged) {
return;
}
if (responseMessage.error === INFURA_BLOCKED_KEY) {
this.emit(NETWORK_EVENTS.INFURA_IS_BLOCKED);
}
}
} catch (err) {
log.warn(`MetaMask - Infura availability check failed`, err);
}
}
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_switchNetwork(opts) {
// Indicate to subscribers that network is about to change
this.emit(NETWORK_EVENTS.NETWORK_WILL_CHANGE);
// Set loading state
this.setNetworkState('loading');
// Reset network details
this.clearNetworkDetails();
// Configure the provider appropriately
this._configureProvider(opts);
// Notify subscribers that network has changed
this.emit(NETWORK_EVENTS.NETWORK_DID_CHANGE, opts.type);
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}
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_configureProvider({ type, rpcUrl, chainId }) {
// infura type-based endpoints
const isInfura = INFURA_PROVIDER_TYPES.includes(type);
if (isInfura) {
this._configureInfuraProvider(type, this._infuraProjectId);
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// url-based rpc endpoints
} else if (type === NETWORK_TYPE_RPC) {
this._configureStandardProvider(rpcUrl, chainId);
} else {
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throw new Error(
`NetworkController - _configureProvider - unknown type "${type}"`,
);
}
}
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_configureInfuraProvider(type, projectId) {
log.info('NetworkController - configureInfuraProvider', type);
const networkClient = createInfuraClient({
network: type,
projectId,
});
this._setNetworkClient(networkClient);
}
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_configureStandardProvider(rpcUrl, chainId) {
log.info('NetworkController - configureStandardProvider', rpcUrl);
const networkClient = createJsonRpcClient({ rpcUrl, chainId });
this._setNetworkClient(networkClient);
}
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_setNetworkClient({ networkMiddleware, blockTracker }) {
const metamaskMiddleware = createMetamaskMiddleware(
this._baseProviderParams,
);
const engine = new JsonRpcEngine();
engine.push(metamaskMiddleware);
engine.push(networkMiddleware);
const provider = providerFromEngine(engine);
this._setProviderAndBlockTracker({ provider, blockTracker });
}
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_setProviderAndBlockTracker({ provider, blockTracker }) {
// update or initialize proxies
if (this._providerProxy) {
this._providerProxy.setTarget(provider);
} else {
this._providerProxy = createSwappableProxy(provider);
}
if (this._blockTrackerProxy) {
this._blockTrackerProxy.setTarget(blockTracker);
} else {
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this._blockTrackerProxy = createEventEmitterProxy(blockTracker, {
eventFilter: 'skipInternal',
});
}
// set new provider and blockTracker
this._provider = provider;
this._blockTracker = blockTracker;
}
}