bladegame / demo-erc721a

ERC721Enumerable vs ERC721A

In this repo, we are going to be using Hardhat to measure relative gas costs for:

• OpenZeppelin ERC721Enumerable, vs.
• Azuki ERC721A

And then deploying a sample ERC721A contract using Alchemy

If you want to run this code yourself:

1. git clone [e-mail]:thatguyintech/demo-erc721a.git
2. npm install
3. npx hardhat test

Let's dig in. First..

• Validate the blog post
  • mint 1 piece up to 5 pieces (batch)
  • compare gas costs

thatguyintech@albert demo-erc721a % npx hardhat test


  OpenZeppelin ERC721 Enumerable
    gas to mint 1 142006
    gas to mint 2 257688
    gas to mint 3 373370
    gas to mint 4 489052
    gas to mint 5 604734
    ✓ cost to mint  (736ms)

  Azuki ERC721A
    gas to mint 1 93704
    gas to mint 2 96212
    gas to mint 3 98720
    gas to mint 4 101228
    gas to mint 5 103736
    ✓ cost to mint  (165ms)

You can see from the above results that the findings in the original Azuki ERC721A blog post are true. Batch-minting 5 pieces using the ERC721A implementation costs around the same (or less!) compared to batch minting only 1 piece using the ERC721Enumerable implementation.

Pretty cool stuff.

• Check how much other functions cost

  • transferFrom
  • setApprovalForAll

• Take a break and reflect on life

Then..

• Create a new contract that inherits from the ERC721A contract

  • Deploy to Rinkeby! Use the Rinkeby Faucet.

• Build a frontend site that displays the gas costs when a user mints