Block (Blockchain Data)
A block is a structured collection of blockchain data, usually containing a batch of transactions and information connecting it to previous blockchain history.
✦ Key Insight
Blocks are the units from which blockchains are constructed. Understanding blocks helps explain: Confirmations Transaction processing Mining Validators Block explorers Network capacity Blockchain history Different networks produce blocks at different speeds and use different data structures.
✕ Common Misconceptions
Assuming one transaction equals one block
Treating all blockchains as having identical block times
Confusing a block with a wallet
Assuming blocks contain only financial transfers
Ignoring block-space limits
Detailed Explanation
How It Works
Transactions are submitted to the network.
A miner or validator selects valid transactions and includes them in a block.
The block is then proposed and accepted according to the network's consensus rules.
Each new block references previous blockchain state, helping create a chronological ledger.
FAQs
How many transactions fit in a block?
It depends on the blockchain and transaction sizes.
Who creates blocks?
Miners or validators, depending on the consensus system.
In Practice
Dig Deeper
Block Explorer
A block explorer is a tool or website that lets users search and view blockchain data, including wallet addresses, transactions, token contracts, blocks, and network activity.
Blockchain
A blockchain is a decentralized digital ledger that records transactions in blocks, links those blocks together, and makes the record difficult to alter.
Transaction
A transaction is an action submitted to a blockchain that changes or records blockchain state. Transactions can transfer cryptocurrency, swap tokens, interact with smart contracts, stake assets, vote, mint tokens, or perform other network operations.