What is Block?

Block (Block) means that in the digital currency network, data will be permanently recorded in the form of files. We call these files blocks. A block is like a page in a real ledger. Block is the basic unit structure of the blockchain. Each block consists of a block header and a block body.

Block concept vocabulary block header The block header stores structured data with a size of 80 bytes, including the hash value of the previous block (parent block hash value), the hash value of the main body of this block (Hash), and the timestamp (TimeStamp), etc.

block body The block body records detailed data generated within a certain period of time, including all transaction information within a certain period of time when the block was mined, arranged in a Merkle tree structure.

hash value A hash value is usually represented by a string of random letters and numbers. It is a set of data of any length mapped into shorter fixed-length data through a hash algorithm (typically MD5, SHA-1, etc.). Mainly used for file verification or signature.

block height The number of blocks between the blockchain and the genesis block (i.e. the first block, the default height is 0), the "block height" is equivalent to the latitude and longitude on the blockchain. It gives the block a "coordinate", and the block height can accurately describe the position of a certain block on the chain.