LUTO

Should I drop this course here??👀👀

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Day 3 Summary — Who Runs the Blockchain Today I learned that blockchains are run by nodes, miners, and validators ... not a company. Nodes are computers around the world that store a copy of the blockchain and check that transactions follow the rules. They help keep the system decentralized and secure. To add new blocks, networks use different systems: • Miners (Proof of Work) :solve complex math problems to add blocks and earn rewards. This is how Bitcoin works, but it uses a lot of energy. • Validators (Proof of Stake): lock up their own crypto and are chosen to confirm blocks. They earn rewards for being honest and lose money if they cheat. This is what Ethereum uses now Blockchain stays secure and decentralized because thousands of computers verify transactions, and special participants (miners or validators) add new blocks using systems designed to prevent cheating.

✅ DAY 3/30

Who Runs the Blockchain?

(Nodes, Miners & Validators) So far I learned what blockchain is and how blocks connect. But today’s big question was: If there’s no company in charge… who actually runs the system? Turns out .. regular people and computers around the world. 🌍 Meet the NODES A node is just a computer connected to the blockchain network. But not just watching , It stores a full copy of the blockchain and helps verify information. Thousands of these nodes exist worldwide. That means: • No single server controls everything • No one can secretly change the records • If one node goes offline, the network keeps running • This is what makes blockchain decentralized. Think of nodes as: 🧠 The memory of the blockchain 👀 The watchers checking everything is correct ✅ What Do Nodes Actually Do? Nodes: •Store the entire blockchain history •Check if transactions follow the rules •Share information with other nodes •Reject fake or invalid transactions So when someone sends crypto, nodes help decide: “Is this legit or not?” ⛏️ Then Who Adds New Blocks? This is where miners and validators come in. Different blockchains use different systems to choose who adds the next block. 🧱 System 1: MINERS (Proof of Work – used by Bitcoin) Miners are special nodes that: Compete to solve a very hard math puzzle ,The first one to solve it earns the right to add the next block, They get rewarded with crypto, This system is called Proof of Work (PoW). Why make it hard? Because it prevents cheating, To fake the blockchain, you’d need more computing power than the rest of the world combined. Basically impossible. Downside: ⚡ Uses a LOT of electricity. 🌱 System 2: VALIDATORS (Proof of Stake – used by Ethereum now) Ethereum switched to a different system called Proof of Stake (PoS). Instead of solving puzzles, validators: Lock up (stake) their own crypto as a deposit, Are randomly chosen to confirm new blocks, Get rewards for being honest, Lose money if they try to cheat... So instead of “work hard with computers,” it’s “risk your own money to prove you’re honest.” Much more energy efficient. 🧠 Why This Matters Because this is how blockchain stays: 🔐 Secure ⚖️ Fair 🌍 Decentralized No boss. No company. No central server. Just: Nodes verifying Miners or validators adding blocks Math enforcing the rules 🔗 Resources I Used Today 🎥 YouTube • simple explained — Proof of Work vs Proof of Stake • Finematics — Blockchain Nodes Explained 📖 Websites • ethereum.org -> Proof of Stake section • bitcoin.org -> How mining works 🚀 Day 3 Complete Now I understand: ✅ What nodes are ✅ How transactions are verified ✅ The difference between miners and validators ✅ Proof of Work vs Proof of Stake (basics) This system is lowkey genius fr.

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*me THIS IS DISCOVERY *someone out there, Ive already finished everything it's up to work I'm dominating the market😭😭

Why are we living for approval???👀👀

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Base 44 marketing 🔥🔥🔥 Even though they're interrupting my lil YouTube session 😂🫠

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luto-portfolio.netlify.app Portfolio updated🫠

Okay sir😂😂 We will keep shipping 🫡

Pre(http://lutoportfolio.netlify.app) Post (luto-portfolio.netlify.app) Tryna update my lil portfolio pre and post channel😂😂

Hehe

Hello there

Umm

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Day 2 Summary How Blockchain Works Today I learned how blockchain is structured and why it is secure. A blockchain is made of blocks that store transaction data. Each block contains a hash, which is a unique digital fingerprint created from the block’s information. Even a small change in the data creates a completely different hash. Blocks are connected in order, and each block also stores the hash of the previous block. This creates a chain. If someone tries to change an older block, its hash changes, which breaks all the blocks after it. This makes tampering with past data extremely difficult. Because copies of the blockchain exist on many computers around the world, the network can quickly detect any fake or altered version.

✅ DAY 2/30 — How Blockchain Actually Works Yesterday was about why Web3 exists. Today was about how blockchain actually works under the hood. And ngl… this part made everything feel more real. 🧱 First: What Is a “Block”? A blockchain is literally made of blocks connected together. Each block contains: • A list of transactions (who sent what to who) • A timestamp • A special code called a hash • The hash of the previous block =>So a block is basically a page of records in a digital notebooks. 🔐 What Is a Hash? This is the magic part. A hash is like a digital fingerprint. It’s created using a math function that turns data into a long string of letters and numbers. Example (not real, just idea): Input: "LUTO sent 2 ETH" Hash: 8f3a9b21c77d4e5f... Here’s what makes hashes powerful: 🔹 If you change ANYTHING in the data… Even changing 1 letter creates a completely different hash.... That means if someone tries to edit a transaction, the hash changes and everyone instantly knows something is wrong. ⛓️ How Blocks Connect (The “Chain” Part) Each block stores: 👉 Its own hash 👉 The previous block’s hash So it looks like this: Block 1 = Hash A Block 2 = Hash B + Hash A Block 3 = Hash C + Hash B If someone tries to change Block 1: Hash A changes That breaks Block 2 (because it stores old Hash A) That breaks Block 3 That breaks EVERY block after it To fake one transaction, you’d have to redo the entire chain on thousands of computers at once. Basically impossible. 🌍 Why This Makes Blockchain Secure Because the chain is: • Linked by hashes • Stored on many computers (nodes) • Constantly being verified • No one can secretly edit history. • You can add new blocks… But you can’t go back and change old ones. 🧠 Analogy That Helped Me Imagine a notebook where: Every page depends on the page before it If you rip out or edit one page, all the page numbers get messed up Thousands of people have the same notebook and compare it constantly If your version doesn’t match theirs = rejected. That’s basically blockchain. ⚡ So What Happens When You Send Crypto? 1️⃣ You request a transaction 2️⃣ The network checks if you actually have the funds 3️⃣ The transaction joins other transactions in a block 4️⃣ The block gets a hash 5️⃣ It’s added to the chain 6️⃣ The whole network updates their copy Now it’s permanent. 💡 Biggest Realizations Today • Blockchain security comes from math + linking blocks together • You can’t change old data without breaking the whole chain This is why people say blockchain is tamper resistant It’s not “unhackable” It’s just insanely hard to cheat the system. 📖 Websites • ethereum.org -> Blockchain basics section • investopedia.com -> Helped with hash explanation 🚀 Day 2 Complete Now I understand: ✅ What a block is ✅ What a hash is ✅ How blocks link together ✅ Why blockchain data is hard to change