Question

What is Block Header in Blockchain

Answer 1

Also, we include a timestamp of when the block was created. These must be monotonically increasing and can also be used to determine how often new blocks are created in the network. . Another hash is used to point out the previous block. This shows why the ledger is also referred to as a blockchain, since blocks are chained together into an ordered list. Besides identifying the previous block, this hash serves to tamperproof the entire previous blockchain. If any previous transaction or block header is changed, this hash value will end up being obviously wrong.

Answer 2

The important components of the block header are.

• version - the version of the block structure
• previous block header hash - a hash representing the address of the previous block
• Merkle root hash - a cryptographic hash of all of the transactions included in this block
• time - represents the time when the block created
• nBits - the difficulty level for block creation.
• nonce ("number used once") - a random value that is added to a hashed block that, when rehashed, meets the difficulty level restrictions.
• Users create transactions and submit them to the network, where they sit in a pool waiting to be included in a block.