Blockchain was invented by Satoshi Nakamoto and has received extensive attention recently. Blockchain server is an immutable ledge which can allow transactionsina decentralized manner.Blockchain basic application can covernumerous fields in economic services, internet of things(iot) etc. Hence, there are many challenges in Blockchainapplication such asscalability and security, which can be overcome. This paper takes anoverview of Blockchainarchitecture and shows some consensus algorithms which are used in different Black chain technology. Further, there are some technical challengesrecent advancements. Then wecan also presentadvanced trends in Blockchain technology.
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