Blockchain
A digital ledger that records transactions across many computers. Once data is added, it can't be changed. This makes it secure and transparent without needing a central authority.
Example
When you send Bitcoin, the transaction is recorded on the Bitcoin blockchain. Thousands of computers verify it, and once confirmed, that record is permanent.
Core Concepts
⚙️How It Works
- 1
Transaction Created
You initiate an action (send crypto, interact with app)
- 2
Broadcast to Network
Your transaction is sent to computers (nodes) worldwide
- 3
Validation
Nodes verify the transaction follows the rules
- 4
Block Formation
Valid transactions are grouped into a block
- 5
Permanent Record
The block is added to the chain and cannot be altered
📊Key Numbers
50,000+
Bitcoin Nodes
computers running the network
~15
Ethereum TPS
transactions per second (L1)
~12 sec
Block Time
Ethereum average