tomw1808/truffle_eth_class2

Course Materials for DApp Development with Solidity

This is the official Repository for all the Code you write during our course.

The course can be found here for limited time for $15: https://www.udemy.com/blockchain-developer/?couponCode=REPO15

Scope

The scope of the Code is to show what you can achieve in Solidity, Ethereum, Web3, Truffle, Ethereum Studio, etc. In Particular:

• demonstrate how to work with the Ethereum Blockchain
• Web3
• Listen and react to specific events
• Write Test Cases
• Deploy the DApp
• Work with Remix
• Work with MetaMask
• Work with Truffle and WebPack

Install Instructions

Geth

Download geth for your platform from https://geth.ethereum.org/downloads/

Geth Mac-OS:

Copy the "geth" file within the download zip into the following folder:

"/usr/local/bin"

Truffle

Install NodeJS first: https://nodejs.org/en/

Then in the Terminal/PowerShell install Truffle:

npm install -g truffle

Known Issues

Fatal: Error starting protocol stack: listen udp :30303: bind: address already in use

When this pops up using Mist on Mac while opening your private network, then you have to specify the exact path to the ipc file. The exact path is printed when geth is started in the command line!

For GETH:

geth attach ipc:/path/to/the/file/geth.ipc

For MIST:

/Applications/Mist.app/Contents/MacOS/Mist --rpc <path to chaindata>/geth.ipc

Contact

If you run into any problems, don't hesitate to contact us on the course-forum at any time. If you use the forum-search function, there is a high chance that you find the answer to your problem already.

truffle_eth_class2's Issues

https://github.com/ethereum/go-ethereum/issues/3793

Hi Tom, given the deprecation of eth_compileSolidity with geth v1.6.0 +, have you considered updating the course?

ethereum/go-ethereum#3793

I can understand if you are busy and don't have the time. This is great stuff and a good contribution to the ecosystem!

Will

npm Install

Hi
Thanks for this great work

I have a problem when installing npm
i install nodejs version 12.6.0 and npm 6.10.1
the problem happens when i run "npm install" with cmd
i tried to change package.json file , cache clean and many others but that didnt work

Contract has not been deployed to detected network

Hi tomw1808,
I'm watching your videos about blockchain developer (on Udemy), when I follow your video and try to Interact with Contract. But I have this problem (picture below). TestRPC is turn on, ... (I do like in your video). I tried search on google but could not find a way to fix it.
Could you help me?

Exampla s08/l06 no longer working with current geth version

The JS in truffle_eth_class2/s08/l06-listen-to-events/index.html uses

web3.eth.compile.solidity(contract_code);

which fires a JS error and is not available any more, according to ethereum/go-ethereum#3793 . It seems like compilation via the RPC is gone altogether. The JS already contains the commented bytecode, so it's easy to get that working again.