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from smtplib import SMTP
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
from jinja2 import Environment, FileSystemLoader
import os

env = Environment(
    loader=FileSystemLoader('templates'))

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Matic MasterClass: Building a Full Stack dApp

Helper Doc

The session won't be focussed on coding, but on the concepts that are involved in building a decentralised application. It is aimed towards an introduction to the programmable capabilities of Ethereum blockchain and the tools that will help you in your journey of becoming an Ethereum developer.

Prerequisites

There are a few prerequisites however if you'd like to follow along the session. You should be familiar with Javascript, Node and HTML. And some familiarity with console will help.

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🛠 Build on Matic: ETHOnline, 2020 [Helper Doc]

This doc contains resources for the Workshop delivered on September 28, 2020 for ETHOnline on Building on Matic.

Contents

• Get Started with Matic
  • Developer Experience
  • User Experience
• Resources

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Usage

Save all three files in a directory and install dependencies:

$ npm init -y
$ npm i -s @maticnetwork/maticjs @truffle/hdwallet-provider web3

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/**
 * fetches all message history from all the channels the bot is added in 
 * make sure to export SLACK_TOKEN in the environment before running the script - this is the bot token
 */
const { WebClient } = require('@slack/web-api')
const fs = require('fs')
const token = process.env.SLACK_TOKEN
const web = new WebClient(token)
const csvWriter = require('csv-write-stream')
const path = require('path')

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• Error TypeError: 'NoneType' object is not callable in google colab while fitting a tensorflow model.
• Resolved by restarting the session and re-running all cells
• Not sure what causes this.

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📝

• How to deploy streamlit apps from custom path + reverse proxy on Amazon EC2 instance?
• Importing Kaggle datasets in Google colab
• TypeError: 'NoneType' object is not callable

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 location  /:CUSTOM-PATH/ {
		proxy_pass         http://127.0.0.1:<PORT>/:CUSTOM-PATH/;
		proxy_set_header   Host      $host;
		proxy_set_header   X-Real-IP $remote_addr;
		proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
		proxy_set_header   X-Forwarded-Proto $scheme;
		proxy_buffering    off;
		proxy_http_version 1.1;
		# Also requires websocket:
		proxy_set_header Upgrade $http_upgrade;

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const Web3 = require('web3')

const rootRPC = ''
const childRPC = ''

const web3 = new Web3 ()
// add pvt for owner account
const pvtKey = ''

// registry contract

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// receiver.sol

pragma solidity ^0.5.11;

// IStateReceiver represents interface to receive state
interface IStateReceiver {
  function onStateReceive(uint256 stateId, bytes calldata data) external;
}

contract receiver {