Web3 Development training - Python

• Create a new folder for your project and open VC code on that folder.

Install Brownie

• Install Python3:

$ brew install python3

• Install Ganache:

$ npm install ganache --global
$ ganache

• Install pipx and Brownie:

$ python3 -m pip install --user pipx
$ python3 -m pipx ensurepath 
$ pipx install eth-brownie

• Alternately, you could install via pip:

pip install eth-brownie

• Initiate your Brownie environment:

$ brownie -- version
$ brownie init
$ ls

• Explore folders that Brownie prepare for us: build, contracts, interfaces, scripts, tests, etc.

Compile a contract

• Copy the file StoreValue.sol to the new created contract folder and compile it:

brownie compile

• Explore the json generated in the build folder.
• Add your Goerli account to Brownie. Get your private key from Metamask:

brownie accounts new my-goerli-account

• List your available accounts:

brownie accounts list

Deploy a contract in your local

• Copy the file scripts/deploy.py file into your scripts folder and run it:

brownie run scripts/deploy.py

Test your contract

• Copy the file test/test_store_value.py and run:

brownie test -s

Deploy to the testnet

• Create a project at Infura. Then, go to settings and find your project ID from the networks endpoints.

https://mainnet.infura.io/v3/<PROJECT ID>

• Add an environment variable for this project ID. For this, copy and update the .env and brownie-config.yaml files.

• Deploy the contract in Goerli:

brownie run scripts/deploy.py --network goerli

• Observe the changes in your wallet every time you execute it.