I started learning crypto from 0. Instead of keeping notes for myself, I'll share everything I learn here. Simple explanations. No complicated jargon. Let's see where this journey goes.

What is a HASH in blockchain? — Day 4 A hash is a unique digital fingerprint of data. Even a tiny change creates a completely different HASH. That’s how blockchain detects any tampering. Ever wondered how crypto knows if someone cheated? Now you do.

Quick note: Nodes are computers that run the blockchain and share transactions across the network. The mempool is where transactions wait before being added to a block.

From there, miners or validators pick transactions and include them in a BLOCK. Other nodes verify the block. Once it is added to the BLOCKCHAIN, the transaction gets its first CONFIRMATION.

Crypto concept I learned today — Day 3 What happens after you send a crypto transaction? First it is broadcast to the network. NODES receive it and share it with other nodes. Transactions then wait in the MEMPOOL.

One thing I'm still curious about: Where do these transactions go next 👀

Crypto concept I learned today — Day 2 What is a crypto TRANSACTION? It’s simply sending crypto from one wallet to another. Every transaction includes: Sender Receiver Amount Once confirmed, it becomes part of the BLOCKCHAIN.

One thing that surprised me: Even a tiny change in data creates a completely different HASH.

Crypto concept I learned today — Day 1 What is BLOCKCHAIN? A blockchain is simply a chain of blocks. Each block contains transactions and the HASH of the previous block. Because every block stores the previous HASH, changing old data becomes very difficult.