Originally, mining was done by Bitcoin software on CPU. PoW is an algorithm used in Bitcoin 0.1 to confirm transactions by finding a hash that meets defined difficulty (number of leading zeros). We also call full nodes wallets when full nodes are used on a cryptocurrency network for sending and receiving coins. However, most full nodes generate private/public key pairs automatically, regardless they are used or not. If your full node is only used to get all blocks and transactions for reviewing, then you don’t need to have a pair of private/public keys. A pair of private/public keys are used for signing new transactions or receiving transactions, which means sending or receiving coins on a cryptocurrency network. This is a misunderstanding that a full node must have a pair of private/public keys. Is able to get new blocks and transactions from other nodes.Is able to provide blocks and transactions to other nodes.Is a fully independent node on a blockchain network. Therefore, we start to hear: Full Node, Light Node, and Miner.Ī full node is a node that downloads all blocks and transactions to its local storage. And then, things became even more complicated, some nodes only want to have a partial set of transactions and blocks, some nodes provide services for people to use cryptocurrency without installing any software, some nodes organize a group of computers to run PoW. Some nodes only want to run PoW to add transactions into a block. Some nodes only want to send and receive coins. Blockchain was moved away from a pure p2p network. Bitcoin 0.1 can run prove of work (PoW) to add transactions into a block.īut, later on, things become complicated.Bitcoin 0.1 can use the public/private key pair to generate transactions, means send or receive coins.Bitcoin 0.1 can generate a public/private key pair.Bitcoin 0.1 can download all transactions and blocks from peer nodes.Bitcoin 0.1 runs on one node can communicate with Bitcoin 0.1 runs on another node.Bitcoin 0.1 was a Windows console application that can do the following things, This is why there was only one software released by Satoshi Nakamoto back to the year 2009. A pure p2p network only needs one application because all nodes are equal. The type of a node is decided by the type of computer and the type of software installed. The reality is that not every single node is the same. A computer could be a personal computer, smartphone, tablet, ASIC machine, etc.Ī pure p2p network has nodes that are all same. Actually, the computer here is not a canonical definition of the computer. We call a computer on a p2p network a node. When one computer is down, it will not impact the communication of the entire network at all. Therefore, there is no bottleneck and failure point. All computers have the same capabilities and privileges. This means that all computers are equal on a p2p network. Computers on a p2p network can both provide services or data and consume services or data. P2P architecture is how computers communicate with each other, in contrast to client/server architecture in which one computer acts as a server to provide services or data and another computer acts as a client that consumes services or data. The blockchain is a distributed database based on peer-to-peer (p2p) architecture. This article is to help readers understand the aforementioned terms. Without understanding them and telling the difference, you will not be able to understand Blockchain. When we are talking about Blockchain, we describe it with a lot of new terms, such as Node, Full Node, Light Node, Miner, etc.
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