67 lines
2.0 KiB
JavaScript
67 lines
2.0 KiB
JavaScript
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"use strict";
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import { ethers } from "ethers";
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import { version } from "./_version";
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const logger = new ethers.utils.Logger(version);
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export class MetamaskProvider extends ethers.providers.Web3Provider {
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constructor(ethereum) {
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if (!ethereum) {
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ethereum = global.ethereum;
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if (!ethereum) {
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logger.throwError("could not auto-detect global.ethereum", ethers.errors.UNSUPPORTED_OPERATION, {
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operation: "window.ethereum"
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});
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}
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}
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super(ethereum);
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let _account = null;
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ethers.utils.defineReadOnly(this, "_pollAccountFunc", () => {
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let account = null;
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if (account === _account) {
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return;
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}
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console.log("poll");
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this.emit("account", account, _account);
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_account = account;
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});
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super(ethereum);
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}
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getSigner(addressOrIndex) {
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if (!this.enabled) {
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return null;
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}
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return super.getSigner(addressOrIndex);
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}
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get enabled() {
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return false;
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}
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_startPollingAccount() {
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if (this._pollingAccount) {
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return;
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}
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console.log("start polling for account changes including to/from null");
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this._pollingAccount = setInterval(this._pollAccountFunc, 1000);
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}
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_stopPollingAccount() {
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if (!this._pollingAccount) {
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return;
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}
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console.log("stop polling for account changes including to/from null");
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clearInterval(this._pollingAccount);
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this._pollingAccount = null;
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}
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on(eventName, listener) {
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super.on(eventName, listener);
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if (this.listenerCount("account") > 0) {
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this._startPollingAccount();
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}
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return this;
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}
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off(eventName, listener) {
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super.off(eventName, listener);
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if (this.listenerCount("account") === 0) {
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this._stopPollingAccount();
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}
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return this;
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}
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}
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