Foundry Simple Storage

This is part of the Cyfrin Updraft Solidity Blockchain Course.

Getting Started

Requirements

git
- You'll know you did it right if you can run git --version and you see a response like git version x.x.x
foundry
- You'll know you did it right if you can run forge --version and you see a response like forge 0.2.0 (816e00b 2023-03-16T00:05:26.396218Z)
- You should also be able to run anvil --version and see a response like anvil 0.2.0 (816e00b 2023-03-16T00:05:26.396218Z)

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.

Setup

Clone this repo

git clone https://github.com/Cyfrin/foundry-simple-storage-cu
cd foundry-simple-storage-cu

Usage

Setup your anvil chain by running the following in your terminal:

anvil

You'll get a large output where the ending looks something like:

==================

31337

Base Fee
==================

1000000000

Gas Limit
==================

30000000

Genesis Timestamp
==================

1717267365

Listening on 127.0.0.1:8545

Copy the number at the end of Listening on XXX and place it into your .env file similar to what's in .env.example, and add an http:// to it.

.env Example:

RPC_URL=http://127.0.0.1:8545

Scroll up in the anvil output, and you'll see a section that looks like this:

Private Keys
==================

(0) 0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80
(1) 0x59c6995e998f97a5a0044966f0945389dc9e86dae88c7a8412f4603b6b78690d
(2) 0x5de4111afa1a4b94908f83103eb1f1706367c2e68ca870fc3fb9a804cdab365a
(3) 0x7c852118294e51e653712a81e05800f419141751be58f605c371e15141b007a6
(4) 0x47e179ec197488593b187f80a00eb0da91f1b9d0b13f8733639f19c30a34926a
(5) 0x8b3a350cf5c34c9194ca85829a2df0ec3153be0318b5e2d3348e872092edffba
(6) 0x92db14e403b83dfe3df233f83dfa3a0d7096f21ca9b0d6d6b8d88b2b4ec1564e
(7) 0x4bbbf85ce3377467afe5d46f804f221813b2bb87f24d81f60f1fcdbf7cbf4356
(8) 0xdbda1821b80551c9d65939329250298aa3472ba22feea921c0cf5d620ea67b97
(9) 0x2a871d0798f97d79848a013d4936a73bf4cc922c825d33c1cf7073dff6d409c6

Wallet
==================
Mnemonic:          test test test test test test test test test test test junk
Derivation path:   m/44'/60'/0'/0/

Grab the top key and place it into your .env.

.env Example:

PRIVATE_KEY=11ee3108a03081fe260ecdc106554d09d9d1209bcafd46942b10e02943effc4a

Compile your code

Run

forge compile

Deploy your contract

forge create SimpleStorage --private-key <PRIVATE_KEY>

Deploying to a testnet

Make sure you have a metamask or other wallet, and export the private key.

IMPORTANT

USE A METAMASK THAT DOESNT HAVE ANY REAL FUNDS IN IT. Just in case you accidentally push your private key to a public place. I highly recommend you use a different metamask or wallet when developing.

Export your private key, and place it in your .env file. DO NOT USE A KEY ASSOCIATED WITH REAL FUNDS. If you plan to, follow the instructions laid out in this section:
1. Never use a .env again
2. Or this one
Go to Alchemy and create a new project on the testnet of choice (ie, Sepolia)
Grab your URL associated with the testnet, and place it into your .env file.
Make sure you have testnet ETH in your account. You can get some here. You should get testnet ETH for the same testnet that you made a project in Alchemy (ie, Sepolia)
Run

forge create SimpleStorage --private-key <PRIVATE_KEY> --rpc-url <ALCHEMY_URL>

Or, you can use a deploy script!

forge script script/DeploySimpleStorage.s.sol --private-key <PRIVATE_KEY> --rpc-url <ALCHEMY_URL>

zkSync instructions

Prerequisites

foundry-zksync
- You'll know you've done it right if you can run forge --version and you see a response like forge 0.0.2 (816e00b 2023-03-16T00:05:26.396218Z)
- If you're unsure whether you're using vanilla or zkSync, note that for zkSync it is 0.0.2, and for vanilla it is 0.2.0 (these are versions which may change over time).
docker
- You'll know you've done it right if you can run docker --version and you see a response like Docker version 20.10.7, build f0df350
nodejs & npm
- You'll know you've done it right if you can run node --version and you see a response like v14.17.0
- Additionally, you'll know you've done it right if you can run npm --version and you see a response like 6.14.13

Run a local zkSync test node

Setup the config

npx zksync-cli dev config

Select in-memory node and no additional plugins.

Run the node

npx zksync-cli dev start

If you get an error like: Command exited with code 1: Error response from daemon: dial unix docker.raw.sock: connect: connection refused, this means docker is not running.

Deploy to zkSync

forge create src/SimpleStorage.sol:SimpleStorage --rpc-url  http://127.0.0.1:8011 --private-key xxx --legacy --zksync

forge script script/DeploySimpleStorage.s.sol --private-key xxx --rpc-url http://127.0.0.1:8011 --legacy --zksync --broadcast

Thank you!

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

ETH/zkSync/Arbitrum/Optimism/etc Address: cyfrin1.eth: 0x3846c3A30E62075Fa916216b35EF04B8F53931f6 (Confirm the ENS matches the address!)

Cyfrin / foundry-simple-storage-cu

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