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/(?<=\s|:)\(?(?:(0?[1-3]\d{1,2})\)?(?:\s|-)?)?((?:\d[\d-]{5}|15[\s\d-]{7})\d+)/

mariano-aguero

import { Injectable } from "@angular/core";
import { ReplaySubject, Observable } from "rxjs/Rx";

interface Message {
    channel: string;
    data: any;
}

@Injectable()
export class MessageBus {

mariano-aguero

How to setup Let's Encrypt for Nginx on Ubuntu 16.04 (including IPv6, HTTP/2 and A+ SLL rating)

There are two main modes to run the Let's Encrypt client (called Certbot):

• Standalone: replaces the webserver to respond to ACME challenges
• Webroot: needs your webserver to serve challenges from a known folder.

Webroot is better because it doesn't need to replace Nginx (to bind to port 80).

In the following, we're setting up mydomain.com. HTML is served from /var/www/mydomain, and challenges are served from /var/www/letsencrypt.

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export async function tryGetRevertReason(to: string, from: string, data: string): Promise<string | undefined> {
  const provider = ethers.getDefaultProvider();
  const tx = { to, from, data };
  try {
    await provider.estimateGas(tx);
  } catch {
    const value = await provider.call(tx);
    return hexDataLength(value) % 32 === 4 && hexDataSlice(value, 0, 4) === '0x08c379a0'
      ? defaultAbiCoder.decode(['string'], hexDataSlice(value, 4))
      : undefined;

mariano-aguero

0x2bfa3a690b88f51c03ddf63e16d9ce55818ca417e6f52adb4b0ab326572bb9e3