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judymcconville@roadrunner.com 2017-05-01 13:03:19 -07:00
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@ -19,7 +19,7 @@ image::images/mbc2_0801.png["FullNodeReferenceClient_Small"]
All nodes include the routing function to participate in the network and might include other functionality. All nodes validate and propagate transactions and blocks, and discover and maintain connections to peers. In the full-node example in <<full_node_reference>>, the routing function is indicated by an orange circle named "Network Routing Node" or with the letter "N".
((("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. These nodes are known as SPV or lightweight nodes. In the full-node example in the figure, the full-node blockchain database function is indicated by a blue circle named "Full Blockchain" or the letter "B". In <<bitcoin_network>>, SPV nodes are drawn without the blue circle, showing that they do not have a full copy of the blockchain.
((("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 or lightweight nodes. In the full-node example in the figure, the full-node blockchain database function is indicated by a blue circle named "Full Blockchain" or the letter "B". In <<bitcoin_network>>, SPV nodes are drawn without the blue circle, showing that they do not have a full copy of the blockchain.
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 black circle named "Miner" or the letter "M".