Blockchain Ethereum Developer Brownie Guide

Andre Vianna

Published in

My Blockchain Zone

3 min readDec 20, 2021

1. Ethereum Brownie

ETH Brownie Explained - What is Brownie? " Moralis - The Ultimate Web3 Development Platform

Do you want to know what Brownie is in the context of Ethereum, and how to use it with Moralis? If so, read on!

moralis.io

Brownie

Brownie is a Python-based development and testing framework for smart contracts targeting the Ethereum Virtual Machine.

GitHub - eth-brownie/brownie: A Python-based development and testing framework for smart contracts…

Brownie is a Python-based development and testing framework for smart contracts targeting the Ethereum Virtual Machine…

github.com

Features

Full support for Solidity and Vyper
Contract testing via pytest, including trace-based coverage evaluation
Property-based and stateful testing via hypothesis
Powerful debugging tools, including python-style tracebacks and custom error strings
Built-in console for quick project interaction
Support for ethPM packages

Install

Installing Brownie - Brownie 1.17.2 documentation

The recommended way to install Brownie is via pipx. Pipx is a tool to help you install and run end-user applications…

eth-brownie.readthedocs.io

python3 -m pip install --user pipx
python3 -m pipx ensurepathpipx install eth-brownie$ brownie
Brownie - Python development framework for Ethereum

Usage:  brownie <command> [<args>...] [options <args>]

brownie networks list

Ethereum
├─Mainnet (Infura): mainnet
├─Ropsten (Infura): ropsten
├─Rinkeby (Infura): rinkeby
├─Goerli (Infura): goerli
└─Kovan (Infura): kovan

Ethereum Classic
├─Mainnet: etc
└─Kotti: kotti

Arbitrum
└─Mainnet: arbitrum-main

Avalanche
├─Mainnet: avax-main
└─Testnet: avax-test

Binance Smart Chain
├─Testnet: bsc-test
└─Mainnet: bsc-main

Fantom Opera
├─Testnet: ftm-test
└─Mainnet: ftm-main

Harmony
└─Mainnet (Shard 0): harmony-main

Polygon
├─Mainnet (Infura): polygon-main
└─Mumbai Testnet (Infura): polygon-test

XDai
├─Mainnet: xdai-main
└─Testnet: xdai-test

Development
├─Ganache-CLI: development
├─Geth Dev: geth-dev
├─Hardhat: hardhat
├─Hardhat (Mainnet Fork): hardhat-fork
├─Ganache-CLI (Mainnet Fork): mainnet-fork
├─Ganache-CLI (BSC-Mainnet Fork): bsc-main-fork
├─Ganache-CLI (FTM-Mainnet Fork): ftm-main-fork
├─Ganache-CLI (Polygon-Mainnet Fork): polygon-main-fork
├─Ganache-CLI (XDai-Mainnet Fork): xdai-main-fork
└─Ganache-CLI (Avax-Mainnet Fork): avax-main-fork

❯ brownie pm install OpenZeppelin/openzeppelin-contracts@4.0.0
Brownie v1.17.2 — Python development framework for Ethereum

47MiB [00:02, 552kiB/s]
Downloading from https://solc-bin.ethereum.org/linux-amd64/solc-linux-amd64-v0.8.10+commit.fc410830

TokenERC20.sol

brownie init
pip install eth-brownie
https://eips.ethereum.org/EIPS/eip-20
Create /contract/TokenERC20.sol
brownie compile
ganache-cli
Create /scripts/1_deploy_token.py
brownie run scripts/1_deploy_token.py

EasyToken.sol

Open Zeppeling Git Hub ERC20

ERC20 - OpenZeppelin Docs

Often, you'll want to be able to divide your tokens into arbitrary amounts: say, if you own 5 GLD, you may want to send…

docs.openzeppelin.com

// contracts/GLDToken.sol // SPDX-License-Identifier: MIT 
pragma solidity ^0.6.0; 
 import "@openzeppelin/contracts/token/ERC20/ERC20.sol"; 
 contract GLDToken is ERC20 {    
 constructor(uint256 initialSupply) public ERC20("Gold", "GLD") {         _mint(msg.sender, initialSupply);     } }

brownie compile
brownie-config.yaml
brownie compile
brownie run scripts/2_deploy_ez_token.py
brownie run scripts/1_deploy_token.py — network rinkeby

ERC20 Standard

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Github Code

GitHub - abdulmalik97/moralis-react-authentication

This project was bootstrapped with Create React App. In the project directory, you can run: Runs the app in the…