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The bitcoin network is a peer-to-peer payment network that operates on a cryptographic protocol. The network requires minimal structure to share transactions. An ad hoc decentralized network of volunteers is sufficient. Messages are broadcast on a best effort basis, and nodes can leave and rejoin the network at will.
Upon reconnection, a node downloads and verifies new blocks from other nodes to complete its local copy of the blockchain. An actual bitcoin transaction including the fee from a webbased cryptocurrency exchange to a hardware wallet. A bitcoin is defined by a sequence of digitally signed transactions that began with the bitcoin’s creation, as a block reward. The owner of a bitcoin transfers it by digitally signing it over to the next owner using a bitcoin transaction, much like endorsing a traditional bank check.