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Oscar | Web3 Dev ⚡ Profile picture
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May 6 • 13 tweets • 6 min read
Don't waste $13k on courses and bootcamps. 💰

Top 10 Youtube channels to learn Web3 for FREE.

A Thread 🧵
1. Patrick Collins ( @PatrickAlphaC )
youtube.com/c/PatrickColli…
2. Ivan on Tech ( @IvanOnTech )
youtube.com/c/IvanonTech
3. Nader Dabit ( @dabit3 )
youtube.com/c/naderdabit
4. DApp University ( @DappUniversity )
youtube.com/c/DappUniversi…
5. Moralis Web3 ( @MoralisWeb3 )
youtube.com/c/MoralisWeb3
6. Smart Contract Programmer ( @ProgrammerSmart )
youtube.com/channel/UCJWh7…
7. EatTheBlocks ( @eattheblocks )
youtube.com/c/EatTheBlocks
8. Francesco Ciulla ( @FrancescoCiull4 )
youtube.com/c/FrancescoCiu…
9. Whiteboard Crypto ( @WhiteboardCryp1 )
youtube.com/c/WhiteboardCr…
10. Finematics ( @finematics )
youtube.com/c/Finematics
If you found it useful, please engage with the firs tweet:
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Drop a 👋 if you are interested in #Solidity and #Web3 content

Let's connect👉 @Web3Oscar
As a result of this tweet going viral, many people are asking me where to start learning web3.

Check this roadmap 👇

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More from @Web3Oscar

Oscar | Web3 Dev ⚡ Profile picture
May 6
Get a remote job in web3 🔥

(Avg. Salary +$100K per year 💰)

A Thread 🧵↓
1/ @Web3Career · Browse 14,654 jobs in Web3 at 1,773 Web3 Projects

web3.career
2/ @CryptoJobsList · Connect with companies hiring in a few clicks and begin your next experience in the industry.

cryptojobslist.com
Read 7 tweets
Oscar | Web3 Dev ⚡ Profile picture
May 5
❌NOTHING can be deleted from the blockchain.

🤔 Or maybe yes ...

👇🧵 Self-Destruct operation in #Solidity
👉There is a way to delete Smart Contracts from the Blockchain, using the self-destruct operation.

👉If there is any remaining Ether stored at that address it is sent to a designated target.
Let's see an example!
Read 5 tweets
Oscar | Web3 Dev ⚡ Profile picture
May 4
A lot of terms in web3, right?

Flashcards can help you deal with that.

🧵👇

#100DaysOfCode #100Devs Image
⚡️10 Web3 concepts you need to MASTER
⚡️Blockchain Basics (26 Cards):
101blockchains.com/flash-cards/bl…
Read 7 tweets
Oscar | Web3 Dev ⚡ Profile picture
May 3
❌"Not enough Ether provided"

👇Error Handling in #Solidity Image
Some of the runtime errors are:
→out-of-gas error
→data type overflow error
→divide by zero error
→array-out-of-index error
→etc
After version 4.10 new error handling statements were introduced such as assert, require, revert.
This replaced Throw.
Read 8 tweets
Oscar | Web3 Dev ⚡ Profile picture
May 2
Ever wondered how to add blockchain or transaction information to your Smart Contract❓

🌐Use Global Variables

👇Here's how ( 🧵) #100Devs #100DaysOfCode #10...
In Solidity, there are certain global variables that are used mainly to provide information about the blockchain or for general-purpose utility functions.

Let's review some of them👇
⚡️'msg' Global Variable:

-msg.data (bytes calldata): complete calldata

-msg.sender (address): sender of the message

-msg.sig (bytes4): first four bytes of the calldata

-msg.value (uint): number of wei sent with the message

Example: Image
Read 7 tweets
Oscar | Web3 Dev ⚡ Profile picture
Apr 22
Learning Web3❓

Here are 10 concepts you need to MASTER if you want to become a Web3 developer.

🧵👇 Thread
1) WEB3:

Web 3.0 is the third generation of the Internet, based on blockchain technology, incorporating concepts such as decentralization and token-based economy and providing autonomy, privacy and security to users.

Users are in control of their own data and applications.
2) ETHEREUM:

Ethereum is an open source blockchain platform that enables developers to write Smart Contracts and deploying decentralized applications or dApps.
Read 12 tweets

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