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ch08: delete extra space

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rating89us 2021-01-18 20:43:05 +01:00 committed by GitHub
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@ -22,7 +22,7 @@ All nodes include the routing function to participate in the network and might i
((("full-node clients")))Some nodes, called full nodes, also maintain a complete and up-to-date copy of the blockchain. Full nodes can autonomously and authoritatively verify any transaction without external reference. ((("simple-payment-verification (SPV)")))Some nodes maintain only a subset of the blockchain and verify transactions using a method called _simplified payment verification_, or SPV. ((("lightweight clients")))These nodes are known as SPV nodes or lightweight nodes. In the full-node example in the figure, the full-node blockchain database function is indicated by a circle called "Full Blockchain" or the letter "B." In <<bitcoin_network>>, SPV nodes are drawn without the "B" circle, showing that they do not have a full copy of the blockchain.
((("bitcoin nodes", "mining nodes")))((("mining and consensus", "mining nodes")))((("Proof-of-Work algorithm")))((("mining and consensus", "Proof-of-Work algorithm")))Mining nodes compete to create new blocks by running specialized hardware to solve the Proof-of-Work algorithm. Some mining nodes are also full nodes, maintaining a full copy of the blockchain, while others are lightweight nodes participating in pool mining and depending on a pool server to maintain a full node. The mining function is shown in the full node as a circle called "Miner" or the letter "M."
((("bitcoin nodes", "mining nodes")))((("mining and consensus", "mining nodes")))((("Proof-of-Work algorithm")))((("mining and consensus", "Proof-of-Work algorithm")))Mining nodes compete to create new blocks by running specialized hardware to solve the Proof-of-Work algorithm. Some mining nodes are also full nodes, maintaining a full copy of the blockchain, while others are lightweight nodes participating in pool mining and depending on a pool server to maintain a full node. The mining function is shown in the full node as a circle called "Miner" or the letter "M."
User wallets might be part of a full node, as is usually the case with desktop bitcoin clients. Increasingly, many user wallets, especially those running on resource-constrained devices such as smartphones, are SPV nodes. The wallet function is shown in <<full_node_reference>> as a circle called "Wallet" or the letter "W."