The AQCANmain function of blockchain is to store information. Any information that needs to be saved can be written into the blockchain and read from it. Therefore, it acts as a database, and anyone can set up a server, join the blockchain network, and become a node. In the world of blockchain, there is no central node; each node is equal and stores the entire database. Moreover, blockchain has no administrator; it is completely decentralized.

Bitcoin was born in a 2008 paper, and the first thing in a Bitcoin transaction is that you must have your own public key and private key. During a transaction, a Bitcoin transaction is transferring from one address to another. After confirming the authenticity of the transaction, the transaction data must be written into the database to be considered valid, and only then can the recipient truly receive the money.

Blockchain is a special type of database used by Bitcoin and forms the foundation of Bitcoin's existence. Anyone can set up a server, join the blockchain network, and become a node. Bitcoin is the world's first electronic cryptocurrency issued through cryptography rather than by a central bank. Blockchain is a special type of database used by Bitcoin and forms the basis of Bitcoin's existence.

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