A batch of transactions added to a blockchain. Each block contains a header (timestamp, previous-block hash, Merkle root) and a list of transactions. Bitcoin produces a block every ~10 minutes; Ethereum every ~12 seconds; Solana every ~400ms. Block size, frequency, and validation rules vary by protocol.
Block
A batch of transactions added to a blockchain. Each block contains a header (timestamp, previous-block hash, Merkle root) and a list of transactions. Bitcoin produces a block every ~10 minutes; Ethereum every ~12 seconds; Solana every ~400ms. Block size, frequency, and validation rules vary by protocol.
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