Blockchain 101 Ep 45 - What information does the blockchain record?

Blockchain is the ledger of the Bitcoin network. Each block is like a ledger’s individual page.

What’s recorded in it?

Each block records data such as block header, transactions, transaction counter, and blocksize.

“Blockheader” contains everything else besides transactions: The hash of the last blockheader, ensuring the blocks’ chronological order;

“Timestamp” records the time when the block is generated;

“Nonce”, the number that all miners seek to find every 10 minutes; And difficulty, which determines how hard it is to guess the answer.

“Transactions” records information such as the sender, receiver, transaction amount and sender’s digital signature. These are the main content in each block.

“Transactions counter” is the number of transactions in each block.

“Blocksize” represents the size of the data in each block.

Currently, the maximum block size is 1MB. It is possible that the block size limit will increase in the future.

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