Block
A batch of valid transactions added to a blockchain, linked to the previous block by a cryptographic hash.
A block is a data structure that records a set of transactions and metadata. Each block references the previous block, creating an ordered chain back to the genesis block.
In proof-of-work networks, miners assemble transactions, search for a valid proof of work, and broadcast the block. Nodes verify the block against consensus rules before accepting it and building on top of it.
Block size, block interval, propagation speed, and validation cost affect throughput, fees, decentralization, and reorg risk. Larger blocks can carry more transactions, but nodes must still be able to download, validate, and relay them reliably.
Related terms
4 linkedExplore connected entries beyond the alphabetical index.
Blockchain
→A distributed ledger made of cryptographically linked blocks that record transactions under shared consensus rules.
Mining
→The process by which new coins or tokens are minted and transactions are confirmed on a blockchain through computational work.
Transaction
→A signed data message that asks a blockchain to transfer value, execute code, or update state.
Block Reward
→The new coins and transaction fees paid to the miner or validator that successfully adds a block.
All terms and definitions may update as the Cryptionary improves.
