Tutorial

ERC20 Fundamentals

14 steps

In this tutorial, we’ll be deep diving into the technical components of what makes a smart contract ERC20 compliant. In particular, we’ll be looking at the mandatory functions and events that every ERC20 token consists of. We’ll also be interacting with two ERC20 smart contracts - one with basic ERC20 functionality and the other with customized functionalities.

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Helpful prior knowledge

Solidity

Learning Outcomes

By the end of this tutorial, you will be able to:

  • Describe the mandatory functions and events that make up an ERC20 compliant smart contract
  • Create and deploy your own ERC20 token
  • Add custom functionality to OpenZeppelin’s ERC20 smart contract

Tutorial Steps

Total steps: 14

  • Step 1: Recap of ERC20 Components
  • Step 2: Inspecting OpenZeppelin’s ERC20.sol
  • Step 3: ERC20 Interface
  • Step 4: totalSupply()
  • Step 5: balanceOf()
  • Step 6: transfer()
  • Step 7: approve()
  • Step 8: transferFrom()
  • Step 9: allowance()
  • Step 10: Transfer & Approval
  • Step 11: Creating an ERC20 Token
  • Step 12: Deploying & Interacting with the ERC20 Token
  • Step 13: Preparing Project Directory
  • Step 14: Creating an Advanced ERC20 Smart Contract
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