html-fund-me-cu

⭐️ (2:37:02) | Lesson 8: HTML Fund Me

This is a minimalistic example what you can find in the metamask docs.

• html-fund-me-f23
• Requirements
  • Optional Gitpod
• Quickstart
  • Execute a transaction - Local EVM
  • Execute a transaction - zkSync
• Thank you!

Requirements

• git
  • You'll know you've installed it right if you can run:
    • git --version
• Metamask
  • This is a browser extension that lets you interact with the blockchain.

Optional Gitpod

If you can't or don't want to run and install locally, you can work with this repo in Gitpod. If you do this, you can skip the clone this repo part.

Quickstart

1. Clone the repo

git clone https://github.com/Cyfrin/html-fund-me-cu
cd html-fund-me-cu

2. Run the index.html file

You can usually just double click the file to "run it in the browser". Or you can right click the file in your VSCode and run "open with live server" if you have the live server VSCode extension (ritwickdey.LiveServer).

And you should see a small button that says "connect".

Hit it, and you should see metamask pop up.

Execute a transaction - Local EVM

If you want to execute a transaction follow this:

Make sure you have the following installed:

1. You'll need to open up a second terminal and run:

git clone https://github.com/Cyfrin/foundry-fund-me-cu
cd foundry-fund-me-cu
make build
make anvil

Then, in a second terminal

make deploy

This will deploy a sample contract and start a local hardhat blockchain.

2. Update your constants.js with the new contract address.

In your constants.js file, update the variable contractAddress with the address of the deployed "FundMe" contract. You'll see it near the top of the hardhat output.

3. Connect your metamask to your local hardhat blockchain.

PLEASE USE A METAMASK ACCOUNT THAT ISNT ASSOCIATED WITH ANY REAL MONEY. I usually use a few different browser profiles to separate my metamasks easily.

In the output of the above command, take one of the private key accounts and import it into your metamask.

Additionally, add your localhost with chainid 31337 to your metamask.

1. Refresh the front end, input an amount in the text box, and hit fund button after connecting

Execute a transaction - zkSync

If you want to execute a transaction follow this:

1. Open up the foundry-fund-me-f23 repo, and run a local zkSync node.

Important

Be sure to go to the repo and follow the install/requirements instructions. The zkSync environment has different requirements to deploy/setup/etc.

git clone https://github.com/Cyfrin/foundry-fund-me-f23
cd foundry-fund-me-f23
make zkbuild
npx zksync-cli dev start

This will setup a docker instance of a local zkSync node.

Then, run:

make deploy-zk

This will deploy a sample contract and start a local zkSync node.

1. Update your constants.js with the new contract address.

In your constants.js file, update the variable contractAddress with the address of the deployed "FundMe" contract. You'll see it after you run make deploy-zk.

2. Connect your metamask to your local zkSync blockchain.

[IMPORTANT] PLEASE USE A METAMASK ACCOUNT THAT ISNT ASSOCIATED WITH ANY REAL MONEY. I usually use a few different browser profiles to separate my Metamasks easily.

Import the DEFAULT_ZKSYNC_LOCAL_KEY from the Makefile of the foundry-fund-me-f23 repo and import it into your metamask.

Additionally, add your zkSync node with chainid 260 to your metamask.

3. Refresh the front end, input an amount in the text box, and hit fund button after connecting

Thank you!

If you appreciated this, feel free to follow me or donate!

ETH/Arbitrum/Optimism/Polygon/etc Address: 0x9680201d9c93d65a3603d2088d125e955c73BD65