Create Basic ERC20 token with Solidity, Brownie and Python

Overview

Create Basic ERC20 token with Solidity, Brownie and Python

Demo

Check out Cornell Token on Rinnkeby network with Etherscan.

demo

Installation

  1. Install brownie with pipx

    $ python3 -m pip install --user pipx
    $ python3 -m pipx ensurepath
    $ pipx install eth-brownie
    
    # test installation
    $ brownie 
  2. Install ganache-cli with npm

    npm install -g ganache-cli

Create the Project

  1. Initialize the project

    $ mkdir cornell_token ; cd cornell_token
    $ brownie init
  2. Create token contract in ./contracts/CornellToken.sol

    • inherit ERC20 implementation from OpenZeppelin to avoid re-inventing the wheel.
  3. Add ./brownie-config.yaml

    1. create mapping @openzeppelin to the github repo
    2. add other config:
      • dotenv
      • private key of local dev
  4. Add .env for the environment variables

    • dotenv -> for private key stuff, as a safer way
  5. Change the name of the Token (e.g. CornellToken)

  6. Creat deploy script deploy_cornell_token.py

    • define initial supply, token name, token sybol
  7. Creat deploy script helper.py

    • get account function

Deploy to local blockchain development environment

$ brownie run scripts/deploy_cornell_token.sol

Deploy to live network

  1. in brownie-config.yaml, add:

    networks:
    rinkeby: active
  2. in .env, add:

    export WEB3_INFURA_PROJECT_ID=<YOUR INFURA PROJECT ID>
    export PRIVATE_KEY=<YOUR PRIVATE KEY>

    To have infura project id, you need to create an infura account and a new project. The id is the endpoint to the live network.

    To access your private key, you can check out the metamask -> account details

  3. run the same script with an extra --network option

    $ brownie run scripts/deploy_cornell_token.sol --network rinkeby

    then wait for a moment to see the address being active on the live network.

  4. add this token to metamask

    • Metamask -> assets -> import tokens
    • grab the token contract address and add it into metamask.
Owner
Ethan Huang
Ethan Huang
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