One of the great things about a decentralized cryptocurrency is that we can directly connect to the network to make transactions. In this video, we'll talk about the Ethereum protocol and what client we'll use.

A Beginner's Guide to Coding with Ethereum

In this video we'll install geth, create a local network, and create our first Ethereum account.


How to Create Ethereum Accounts with Geth

Now that we have some accounts, we can earn ETH by running a miner.

How to Mine Ethereum Locally with Geth

Using Geth to Transfer Ethereum Between Accounts

Getting Started with Ethereum

What is a smart contract? It's like a regular contract, but defined by code (and in Ethereum with Solidity, a smart contract is essentially an instance of a class).


What is a Smart Contract? An Intro to Ethereum and Solidity

In this video, we'll write our first Solidity smart contract


How to Write an Ethereum Smart Contract with Solidity

How to Write and Compile a Solidity Smart Contract

How to Call An Ethereum Smart Contract Code From Javascript

Building Smart Contracts

How to Connect to Ethereum with Web3.js From JavaScript

How to Interact with Smart Contracts on Ethereum Blockchain

Connecting Etherum and the Browser

solc

geth

web3

In this course, we'll walk through what Ethereum is, how to write _smart contract_ - code that describes an agreement between parties. We'll start by creating a local test network, mining some Ether and then sending value between the accounts.

After that, we'll talk about Solidity, Ethereum's smart contract programming language. We'll build our first smart contract and interact with it on the commandline.

After that, we'll hook up to our smart contract to our web browser to build a UI using web3 and JavaScript.

In this course, we'll show you how to create your first Smart Contract with Ethereum

Intro to Programming Ethereum ĐApps

How to use web3 to connect with your browser

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  In this video, we'll write our first Solidity smart contract
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Now that we know we have a connection between our browser
and our Ethereum node
Let's make a connection to our contract

Remember that in order to create a JavaScript representation of our contract, we need to load the abi

Let's copy the abi that we compiled earlier into this project. Only I'm going to rename it to counter_sol_Counter_abi.json

In the code, we can require this .json file -- this is possible because of the nwb config, if you're building using another method you could always just copy and paste the abi here in the code
t counterAbi = require('./counter_sol_Counter_abi.json');

We can log it out and make sure it loaded. Great
nsole.log(counterAbi);

Also remember that our particular instance of the counter contract lives at a specific address on the blockchain.
I hope you saved the contract address from last time.

    let contractAddr = '0x4575e7fcf12a110060ebc1e3b2b85706ddfbc97e';