Patrick Collins

Follow @PatrickAlphaC

May 26 • 24 tweets • 169 min read

ITS FINALLY HERE

🎊🎉🎊🎉🎊🎉🎊🎉🎊🎉🎊🎉
The Ultimate, Learn Blockchain Development, Solidity, Full-stack Web3, & Smart Contract Course | Javascript (& Typescript) Edition on @FreeCodeCamp!
🎊🎉🎊🎉🎊🎉🎊🎉🎊🎉🎊🎉

Here is everything you'll learn from this course, and more 👇

@freeCodeCamp Starting with the links to the content, then we will go into

🔗 Here's a link to the course.

After 4+ months of pouring every ounce of information into a video, this is where we have arrived - with 30+ hours of pure

@freeCodeCamp 🔗 And here's a link to the GitHub repo with all the course content, discussions, and of course - all the code.

And now... Let's rattle off some of the technologies and groups you'll work with, and then we'll discuss when and how!

👇

github.com/smartcontractk…

@freeCodeCamp - @solidity_lang
- @JavaScript
- @Chainlink
- @MetaMask
- @AlchemyPlatform
- @EthereumRemix
- @HardhatHQ
- @Openzeppelin
- @graphprotocol
- @trailofbits
- #Ganache
- #EthersJS
- @etherscan
- @CoinMarketCap
- @AaveAave
- @IPFS
- @FleekHQ
- @Filecoin
- @reactjs
- @nextjs

@freeCodeCamp @solidity_lang @JavaScript @chainlink @MetaMask @AlchemyPlatform @EthereumRemix @HardhatHQ @OpenZeppelin @graphprotocol @trailofbits @etherscan @CoinMarketCap @AaveAave @IPFS @FleekHQ @Filecoin @reactjs @nextjs - @MoralisWeb3
- #Web3uikit
- @opensea
- @pinatacloud
- @nft_storage
- @arbitrum
- #Ethereum
- @github
- @nodejs
- @code
- @tailwindcss
- @GraphQL
- @DefiLlama
- @RektHQ
- @typescript

and WAY more. Here's how it goes down...

@freeCodeCamp @solidity_lang @JavaScript @chainlink @MetaMask @AlchemyPlatform @EthereumRemix @HardhatHQ @OpenZeppelin @graphprotocol @trailofbits @etherscan @CoinMarketCap @AaveAave @IPFS @FleekHQ @Filecoin @reactjs @nextjs @MoralisWeb3 @opensea @pinatacloud @nft_storage @arbitrum @github @nodejs @code @tailwindcss @GraphQL @DefiLlama @RektHQ @typescript ⛓ Lessons 0 & 1

🧱 We start, with the fundamentals - not even coding fundamentals, but blockchain fundamentals as a whole.

If you want lessons 0 & 1, you'll understand blockchain & smart contracts on a high level - no coding!

@freeCodeCamp @solidity_lang @JavaScript @chainlink @MetaMask @AlchemyPlatform @EthereumRemix @HardhatHQ @OpenZeppelin @graphprotocol @trailofbits @etherscan @CoinMarketCap @AaveAave @IPFS @FleekHQ @Filecoin @reactjs @nextjs @MoralisWeb3 @opensea @pinatacloud @nft_storage @arbitrum @github @nodejs @code @tailwindcss @GraphQL @DefiLlama @RektHQ @typescript You can take lessons 0 & 1 even if you don't want to become a dev.

We learn how cryptography works at a high level, some history of #bitcoin & #ethereum, and how @chainlink enables smart contracts to come to life - as well as the value of smart contracts!

@freeCodeCamp @solidity_lang @JavaScript @chainlink @MetaMask @AlchemyPlatform @EthereumRemix @HardhatHQ @OpenZeppelin @graphprotocol @trailofbits @etherscan @CoinMarketCap @AaveAave @IPFS @FleekHQ @Filecoin @reactjs @nextjs @MoralisWeb3 @opensea @pinatacloud @nft_storage @arbitrum @github @nodejs @code @tailwindcss @GraphQL @DefiLlama @RektHQ @typescript 🎧 Lessons 2, 3, &4
We finally start coding! Using @solidity_lang & @EthereumRemix, we begin our developer journey.

We learn Solidity Basics like:
- Types
- Interfaces
- Inheritance
- @chainlink
- libraries

& More

👩🏻‍💻 And you'll deploy your first-ever smart contract!

@freeCodeCamp @solidity_lang @JavaScript @chainlink @MetaMask @AlchemyPlatform @EthereumRemix @HardhatHQ @OpenZeppelin @graphprotocol @trailofbits @etherscan @CoinMarketCap @AaveAave @IPFS @FleekHQ @Filecoin @reactjs @nextjs @MoralisWeb3 @opensea @pinatacloud @nft_storage @arbitrum @github @nodejs @code @tailwindcss @GraphQL @DefiLlama @RektHQ @typescript 🩻 Lesson 5

We move from Remix into @code and start learning a more "bare-bones" approach to sending transactions. We start working with @javascript (and optionally TS), #ethersjs, & we get you all setup to start developing locally!

And a guest appearance from @thatguyintech!

@freeCodeCamp @solidity_lang @JavaScript @chainlink @MetaMask @AlchemyPlatform @EthereumRemix @HardhatHQ @OpenZeppelin @graphprotocol @trailofbits @etherscan @CoinMarketCap @AaveAave @IPFS @FleekHQ @Filecoin @reactjs @nextjs @MoralisWeb3 @opensea @pinatacloud @nft_storage @arbitrum @github @nodejs @code @tailwindcss @GraphQL @DefiLlama @RektHQ @typescript @thatguyintech 👷‍♂️ Lessons 6, 7, & 9

Yes, 6, 7, & 9 (lesson 8 soon)

In these lessons, work with the fast and flexible #Web3 framework @HardhatHQ!

We’ll use Hardhat to explore advanced testing tools, identify gas optimizations, and create our first @github repo!

@freeCodeCamp @solidity_lang @JavaScript @chainlink @MetaMask @AlchemyPlatform @EthereumRemix @HardhatHQ @OpenZeppelin @graphprotocol @trailofbits @etherscan @CoinMarketCap @AaveAave @IPFS @FleekHQ @Filecoin @reactjs @nextjs @MoralisWeb3 @opensea @pinatacloud @nft_storage @arbitrum @github @nodejs @code @tailwindcss @GraphQL @DefiLlama @RektHQ @typescript @thatguyintech Hardhat is used by billion-dollar protocols like @AaveAave, @synthetix_io, @Uniswap, and so many more.

We learn advanced testing tools, and gas optimizations, and we create our first @github repo!

Including guest appearances from @camiinthisthang & @stephenfluin

@freeCodeCamp @solidity_lang @JavaScript @chainlink @MetaMask @AlchemyPlatform @EthereumRemix @HardhatHQ @OpenZeppelin @graphprotocol @trailofbits @etherscan @CoinMarketCap @AaveAave @IPFS @FleekHQ @Filecoin @reactjs @nextjs @MoralisWeb3 @opensea @pinatacloud @nft_storage @arbitrum @github @nodejs @code @tailwindcss @GraphQL @DefiLlama @RektHQ @typescript @thatguyintech @synthetix_io @Uniswap @camiinthisthang @stephenfluin 🎊 Getting through these lessons, you'll have ALL the basics to become a smart contract engineer in the backend!

✅ But don't stop there! Keep going, the amazing content is just getting started!

@freeCodeCamp @solidity_lang @JavaScript @chainlink @MetaMask @AlchemyPlatform @EthereumRemix @HardhatHQ @OpenZeppelin @graphprotocol @trailofbits @etherscan @CoinMarketCap @AaveAave @IPFS @FleekHQ @Filecoin @reactjs @nextjs @MoralisWeb3 @opensea @pinatacloud @nft_storage @arbitrum @github @nodejs @code @tailwindcss @GraphQL @DefiLlama @RektHQ @typescript @thatguyintech @synthetix_io @Uniswap @camiinthisthang @stephenfluin 🥞 Lessons 8 & 10

We teach you the fundamentals of working in the front end - and start moving into the full stack!

We work with @MoralisWeb3 hooks, @ipfs hosting, @nextjs, @reactjs, and everything you need to build a web3 website!

With a guest appearance from @DeveloperAlly

@freeCodeCamp @solidity_lang @JavaScript @chainlink @MetaMask @AlchemyPlatform @EthereumRemix @HardhatHQ @OpenZeppelin @graphprotocol @trailofbits @etherscan @CoinMarketCap @AaveAave @IPFS @FleekHQ @Filecoin @reactjs @nextjs @MoralisWeb3 @opensea @pinatacloud @nft_storage @arbitrum @github @nodejs @code @tailwindcss @GraphQL @DefiLlama @RektHQ @typescript @thatguyintech @synthetix_io @Uniswap @camiinthisthang @stephenfluin @DeveloperAlly 🪙 Lessons 11 & 12

We give you some boilerplate code to start every new project you create, and teach you how to create your own ERC20 token in seconds!

@freeCodeCamp @solidity_lang @JavaScript @chainlink @MetaMask @AlchemyPlatform @EthereumRemix @HardhatHQ @OpenZeppelin @graphprotocol @trailofbits @etherscan @CoinMarketCap @AaveAave @IPFS @FleekHQ @Filecoin @reactjs @nextjs @MoralisWeb3 @opensea @pinatacloud @nft_storage @arbitrum @github @nodejs @code @tailwindcss @GraphQL @DefiLlama @RektHQ @typescript @thatguyintech @synthetix_io @Uniswap @camiinthisthang @stephenfluin @DeveloperAlly 💰 Lesson 13

Defi!

We take you on a journey through @AaveAave and working with defi protocols programmatically. You can start your journey building defi protocols and becoming a defi quant!

And also... A special guest appearance from @austingriffith

@freeCodeCamp @solidity_lang @JavaScript @chainlink @MetaMask @AlchemyPlatform @EthereumRemix @HardhatHQ @OpenZeppelin @graphprotocol @trailofbits @etherscan @CoinMarketCap @AaveAave @IPFS @FleekHQ @Filecoin @reactjs @nextjs @MoralisWeb3 @opensea @pinatacloud @nft_storage @arbitrum @github @nodejs @code @tailwindcss @GraphQL @DefiLlama @RektHQ @typescript @thatguyintech @synthetix_io @Uniswap @camiinthisthang @stephenfluin @DeveloperAlly @austingriffith 🎨 Lessons 14 & 15

If you finish these lessons... You are an absolute FORCE of a blockchain engineer!

We learn EVERYTHING about NFTs and make our own NFT marketplace, 100% with a website to boot!

And special thanks to @mdurkin92 on this one!

@freeCodeCamp @solidity_lang @JavaScript @chainlink @MetaMask @AlchemyPlatform @EthereumRemix @HardhatHQ @OpenZeppelin @graphprotocol @trailofbits @etherscan @CoinMarketCap @AaveAave @IPFS @FleekHQ @Filecoin @reactjs @nextjs @MoralisWeb3 @opensea @pinatacloud @nft_storage @arbitrum @github @nodejs @code @tailwindcss @GraphQL @DefiLlama @RektHQ @typescript @thatguyintech @synthetix_io @Uniswap @camiinthisthang @stephenfluin @DeveloperAlly @austingriffith @mdurkin92 Not only that, but we dive deep into the lower-level solidity & bytecode of our contracts - and learn we can call any function with certain bytecode!

Then, we flesh out our website with @MoralisWeb3 & @graphprotocol, with guest appearances from @IvanOnTech & @dabit3

@freeCodeCamp @solidity_lang @JavaScript @chainlink @MetaMask @AlchemyPlatform @EthereumRemix @HardhatHQ @OpenZeppelin @graphprotocol @trailofbits @etherscan @CoinMarketCap @AaveAave @IPFS @FleekHQ @Filecoin @reactjs @nextjs @MoralisWeb3 @opensea @pinatacloud @nft_storage @arbitrum @github @nodejs @code @tailwindcss @GraphQL @DefiLlama @RektHQ @typescript @thatguyintech @synthetix_io @Uniswap @camiinthisthang @stephenfluin @DeveloperAlly @austingriffith @mdurkin92 @IvanOnTech @dabit3 🏘 Lessons 16 & 17

We learn advanced smart contract patterns like upgradeable smart contracts - and we learn how to build our own DAO end-to-end!

@freeCodeCamp @solidity_lang @JavaScript @chainlink @MetaMask @AlchemyPlatform @EthereumRemix @HardhatHQ @OpenZeppelin @graphprotocol @trailofbits @etherscan @CoinMarketCap @AaveAave @IPFS @FleekHQ @Filecoin @reactjs @nextjs @MoralisWeb3 @opensea @pinatacloud @nft_storage @arbitrum @github @nodejs @code @tailwindcss @GraphQL @DefiLlama @RektHQ @typescript @thatguyintech @synthetix_io @Uniswap @camiinthisthang @stephenfluin @DeveloperAlly @austingriffith @mdurkin92 @IvanOnTech @dabit3 🔐 Lesson 18

Then, we finally end it with a number of security & auditing tips - using many of the tools from @trailofbits & @OpenZeppelin.

And... We send you on your way... with a TON of links to next steps so you can achieve your goals!

@freeCodeCamp @solidity_lang @JavaScript @chainlink @MetaMask @AlchemyPlatform @EthereumRemix @HardhatHQ @OpenZeppelin @graphprotocol @trailofbits @etherscan @CoinMarketCap @AaveAave @IPFS @FleekHQ @Filecoin @reactjs @nextjs @MoralisWeb3 @opensea @pinatacloud @nft_storage @arbitrum @github @nodejs @code @tailwindcss @GraphQL @DefiLlama @RektHQ @typescript @thatguyintech @synthetix_io @Uniswap @camiinthisthang @stephenfluin @DeveloperAlly @austingriffith @mdurkin92 @IvanOnTech @dabit3 😮‍💨 And after all that... You will have everything you need to be a successful full-stack, blockend, backend, solidity, smart contract dev, or whatever kind of engineer or non-engineer in the space you want to be.

@freeCodeCamp @solidity_lang @JavaScript @chainlink @MetaMask @AlchemyPlatform @EthereumRemix @HardhatHQ @OpenZeppelin @graphprotocol @trailofbits @etherscan @CoinMarketCap @AaveAave @IPFS @FleekHQ @Filecoin @reactjs @nextjs @MoralisWeb3 @opensea @pinatacloud @nft_storage @arbitrum @github @nodejs @code @tailwindcss @GraphQL @DefiLlama @RektHQ @typescript @thatguyintech @synthetix_io @Uniswap @camiinthisthang @stephenfluin @DeveloperAlly @austingriffith @mdurkin92 @IvanOnTech @dabit3 💪 It's a big course, so pace yourself, engage with the community, and remember to have fun.

And if you want, find the fun challenges hidden in @arbitrum. 😈 😉

@freeCodeCamp @solidity_lang @JavaScript @chainlink @MetaMask @AlchemyPlatform @EthereumRemix @HardhatHQ @OpenZeppelin @graphprotocol @trailofbits @etherscan @CoinMarketCap @AaveAave @IPFS @FleekHQ @Filecoin @reactjs @nextjs @MoralisWeb3 @opensea @pinatacloud @nft_storage @arbitrum @github @nodejs @code @tailwindcss @GraphQL @DefiLlama @RektHQ @typescript @thatguyintech @synthetix_io @Uniswap @camiinthisthang @stephenfluin @DeveloperAlly @austingriffith @mdurkin92 @IvanOnTech @dabit3 🔁 ❤️ Please smash this tweet a link and a retweet so we can bring web3 and blockchain to the masses by ushering the next generation of smart contract engineers.

https://twitter.com/PatrickAlphaC/status/1529932735665651716

@freeCodeCamp @solidity_lang @JavaScript @chainlink @MetaMask @AlchemyPlatform @EthereumRemix @HardhatHQ @OpenZeppelin @graphprotocol @trailofbits @etherscan @CoinMarketCap @AaveAave @IPFS @FleekHQ @Filecoin @reactjs @nextjs @MoralisWeb3 @opensea @pinatacloud @nft_storage @arbitrum @github @nodejs @code @tailwindcss @GraphQL @DefiLlama @RektHQ @typescript @thatguyintech @synthetix_io @Uniswap @camiinthisthang @stephenfluin @DeveloperAlly @austingriffith @mdurkin92 @IvanOnTech @dabit3 And in case you missed it, here is the link to the video again.

@freeCodeCamp @solidity_lang @JavaScript @chainlink @MetaMask @AlchemyPlatform @EthereumRemix @HardhatHQ @OpenZeppelin @graphprotocol @trailofbits @etherscan @CoinMarketCap @AaveAave @IPFS @FleekHQ @Filecoin @reactjs @nextjs @MoralisWeb3 @opensea @pinatacloud @nft_storage @arbitrum @github @nodejs @code @tailwindcss @GraphQL @DefiLlama @RektHQ @typescript @thatguyintech @synthetix_io @Uniswap @camiinthisthang @stephenfluin @DeveloperAlly @austingriffith @mdurkin92 @IvanOnTech @dabit3 Good luck, have fun, let's make the second half of this year for the builders & devs of the space.

Web3!!!!!
🦾🦾🦾🦾🦾🦾🦾

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More from @PatrickAlphaC

Patrick Collins

May 25

🙏 The .env pledge

⚠️ Too many new developers have exposed their private keys due to .env files being pushed up to github.

🔐 Help me spread this message by taking the pledge with me, and we can help all the new developers out there not get rekt.

👇

I solemnly swear, that I will never place a private key or secret phrase or mnemonic in a .env file that is associated with real funds.

I will only place private keys in a .env file that have ONLY testnet ETH, LINK, or other cryptocurrencies.

When I'm testing and developing, I will use a different wallet than the one associated with my real funds.

Patrick Collins

May 2

🛡 How to get prices securely in web3

🧵A thread

We've seen way too many hacks with this DeFi 101 issue. Please spread this message.

1. Don't ever use low liquidity tokens

2. Use a decentralized oracle like @chainlink

3. TWAPs are scary AF

And the most important one... 👇

A
👏
DEX
👏
IS
👏
A
👏
CENTRALIZED
👏
PRICE
👏
ORACLE

1. Don't use low liquidity tokens

Any token that has low volume (meaning, it's not traded a lot, & often its market cap is low) can be easily manipulated.

If your protocol relies on a token that can be easily manipulated, you are headed to the @RektHQ front page.

Patrick Collins

Apr 30

Make it a habit.

If you set a goal, focus 90% of your effort on habitualizing the daily routines it takes to accomplish the goal - and track how often those daily habits brought you closer to the goal.

If not, after a specific time frame, alter the daily habit.

Some people spend so much time setting a goal, and telling other people about how amazing g the new they set is, they never do the work to reach it.

1. Set the goal
2. Set the DAILY routines it takes to get there
3. Reflect that those routines are helping.

Don’t tell people your goal.

Every time you tell people your goal, and someone goes “wow, what a great goal!” - you sap motivation.

That positive praise should be reserved for when you complete your challenge, not before.

Often, you need every ounce of motivation you can get

Patrick Collins

Apr 21

✏️ Solidity Tip!

You can call any function w/o the contract ABI, we need to know about function selectors and signatures.

Example Function Selector:
0xa9059cbb

Example Function Signature:
"transfer(address,uint256)"

Function Selector: The first 4 bytes of the call data for a function call that specifies the function to be called.

Function Signature: A string of the function name and parameter types.

Examples:

Why do we care?

You can call a function directly in solidity just by knowing its function selector or signature and hashing the data of the input parameters!

If I know an address has a transfer function that takes an address and a uint256, I can call it like so:

Patrick Collins

Apr 18

Sometimes I won't be able to answer all your questions fast enough - and sometimes not at all. I really wish I could.

🧵 It's really a shame when you see stuff like this. Quick thread.

PS. If you find this person, please don't go after them. We all have bad days.

As a community, we have to be collaborative,
resourceful, and above all else kind. Otherwise, we will end up just rebuilding all the bad practices of web2.

Eventually, this person did exactly what they should do - being resourceful and finding the answer another way.

And sometimes, I know all of you are going to face stuff like this.

It happens.

But I encourage you to try to take the high road as often as you can. There are very few circumstances where more action than that will be needed.

Patrick Collins

Apr 13

1/11
💾 Let's learn about storage in solidity!
A web3 educational thread 🧵 👇

📄 Storage is where our state or global variables get stored in our smart contracts. Whenever we create a contract-level variable, in the background, solidity adds it to this "storage" data structure!

3/11
🧮 Now when we store a storage variable, in the background, solidity adds our variable to storage, which can be thought of as a sequentially indexed list.

The first variable we name will go in the 0th storage slot.

4/11
🫔 The data is encoded to its bytes32 form in the storage data structure. So we can store any of our basic types like bool, uint, int, etc.

The second variable we name will go in the 2nd slot.

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