how to make blockchain

() ???????? Lastjobsendtime + kminingnotifyinterval_ ???? {???????? Sharedptr. Rbegin ()->second;???????? Sendminingnotify (Exjob);????}}Jobrepository::jobrepository (const char kafkabrokers,???? Const string filelastnotifytime,???? Server Server):Running(true),Kafkaconsumer(kafkabrokers, Kafka_topic_stratumJOB, 0/patition/),Server(server), Filelastnotifytime(Filelastnotifytime),Kmaxjobslifetime(300),Kminingnotifyinterval(+),//Todo:make as config argLastjobsendtime(0){???? ASSERT (Kminingnotify

If the chunk is synchronized to a node each time, it can be manually added as a static node, which can greatly improve the efficiency of synchronizationHere to apply a 79619646 of the private chain, thank you, I will not have to create a virtual machine to do the static nodeFunction default everyone has installed mist, it is a set of WEB3 and wallet tools, the default will also have Geth installation, of course, can also use the above address Geth installation methodThe creation of a document to

, mspid string) Error // load the local mspfunc getlocalmsp () MSP from the specified directory. MSP // retrieve MSP. newbccspmsp () Create bccspmsp instance func getlocalsigningidentityorpanic () MSP. signingidentity // getlocalmsp (). getdefaultsigningidentity () // code in MSP/MGMT. go Func loadlocalmsp (DIR string, bccspconfig * factory. factoryopts, mspid string) error code: Conf, err: = MSP. getlocalmspconfig (Dir, bccspconfig, mspid) // obtain the local MSP configuration and write it to M

process to write dead or randomly generated parameters into the JSON file, that is, the above fileCreate the core code of the account: (Accounts.keystore.keystore_passphrase.go)The Encryptkey method inFuncencryptkey (Key key,authstring,scryptn,scryptpint) ([]byte,error)Where key is an encrypted account, including ID, public private key, addressAuth is the password entered by the userSCRYPTN, is the n in the scrypt algorithmP in the Scryptp,scrypt algorithmDerivedkey, err: = Scrypt. Key (Autharr

Brother even blockchain tutorial Open-ethereum-pool Ethereum mine Pool source Analysis Unlocker moduleOpen-ethereum-pool Ethereum Mine Pool-unlocker moduleUnlocker module ConfigurationJson"Unlocker": {????" Enabled ": false,????" Poolfee ": 1.0,????" Poolfeeaddress ":" ",????" Donate ": True,????" Depth ": 120,????" Immaturedepth ": 20,????" Keeptxfees ": false,????" Interval ":" 10m ",????" Daemon ":" http://127.0.0.1:8545 ",????" Timeout ":" 10s "},

https://bitcoin.org/en/https://www.ethereum.org/https://www.rsk.co/http://www.oraclize.it/Https://lisk.io/downloadhttps://www.blockstream.com/http://coloredcoins.org/https://counterparty.io/Http://cn.hyperledger.org/projects/fabrichttps://www.openchain.org/Https://github.com/IBM-Blockchain/marbles?spm=a2c4e.11153940.blogcont60443.9.4e5db278dvAFRTHttps://github.com/openchain/openchain?spm=a2c4e.11153940.blogcont60443.11.4e5db278dvAFRTHttps://github.com

block chain/distributed ledger technology vendors and products/projectsVendors and products/projects of Blockchain/distributed Ledger Technologies main programming language Major programming Languages source code repository source repositories IBM Openblockchain (OBC) Go (Golang) https://github.com/openblockchain/ Ethereum (ether Square) C + +, go (Golang) Https://github.com/ethereum Https://github.com/e

Since the last few weeks to publish the blockchain exam, many people ask Elwin standard answer, I here to provide my answer, provide reference for everyone. If you have different answers, please leave a message or tweet to me (Weibo.com/elwingao) for discussion. level Two exam reference answer First, single choice1D 2A 3 a 4C 5B 6BSecond, non-problem1, N2, N3, Y4, N5, N6, Y7, N8, N9, N10, NIii. Multiple choice of topics1, A,b,d2, B,c3, A,b,d4, A,

Blockchain Enthusiast (qq:53016353) The previous analysis program looked at the details of the analysis, so without the concept of framework, took two days to analyze the Hyperledger fabric architecture design, analysis of the program does not reference any information, such as error welcome correction, common progress. The author has the following questions before the detailed analysis procedure:1) How the CLI (command line) client sends a command to

Blockchain Enthusiast (qq:53016353) As the core concept of Bitcoin, digital currency (data chunks, data blocks, data block chains) plays an important role in understanding the structure of Bitcoin. In what is data chunks, the editor simply introduces the concept of data chunks from the point of view of distributed transaction records in data chunks. Today, the editor analyzes the details of what is being recorded in the data block from the program str

Blockchain Enthusiast (qq:53016353) The virtual currency of the handed down block first to confirm whether your founder ID is already in the btsx of the creation block. BTSX client in the Select Directory--register, and then enter your initiation ID, if you see in the list and the right side display Genesis words, the description has been successfully included in the Genesis block. You can also find (5MB) in the following file, note that if your found

April 19, the blockchain media Gyro financial official online app, according to the official news, Gyro Financial app is currently the first in China based on the EOS eco-research and development of the blockchain media platform, and has been recognized and affirmed the EOS community. Gyro Finance App Pass card--TLBC The top financial app uses blockchain thinki

Blockchain Enthusiast (qq:53016353) First, confirm the basic environment Operating system: It is recommended to install Ubuntu 14.04 Desktop 64bit in virtual machine form Other operating systems can refer to this article for self-testing. node. JS: Blockchain.info requires node >= 0.12.0 npm >= 2.12.0, The command reference for viewing an existing node. js version is as follows:Apt-cache Policy NodejsNode-vNpm-v If Nodejs is not already instal

The term "blockchain" was a very small technical term three years ago, but with 2017 of all kinds of encryption digital currency turned out, the word now become people do not know, indeed, even jump square dance of the aunt have joined the ranks of the FRY, but this is not a good signal, as the saying goes " Aunt's involvement is the best look at the empty indicator ", sure enough, after Bitcoin reached the peak price, began to dive all the way, to no

We ' re back on it in the Proof of Work difficulty spectrum, this time going through how Ethereum ' s difficulty Time. This is part 4.2 of the "Part 4 series" Where part 4.1 was about Bitcoin ' PoW difficulty, and the following 4.3 would be ab Out JBC ' s PoW difficulty. Tl;dr To calculate the difficulty for the next Ethereum blocks, you calculate the time it took to mine the previous blocks, and if That's time difference is greater than the goal time, then the difficulty goes down to

: = Make ([][]byte, 1) prevpkscripts[0] = Prevpkscript tx: = wire. msgtx{ Version: Wire . Txversion, txin: inputs, txout: outputs, locktime:0,} Fourth Step: Signature Transaction (Signature input) 3. Signature Privkey: = "cv4hmdzgf3gg7ndetvv7sjq22yobmzbe5megkuqvqtxxxxx"//Private key sign (TX, Privkey, prevpkscripts)//Signature method Func signs ( Tx *wire. MSGTX, privkeystr string, prevpkscripts [][]byte) { Inputs: = TX. Txin w

In Ethereum, we provide instructions to abigen our smart contract Go language files, and many tutorials on the web are based on this directive to generate contract go files for operation. Reference:Github A source code implementationUse the go language to interact with Ethereum smart contractsBut these articles are old .... There are problems that make you crash.abigenInside is actually called solc to the contract file to compile the corresponding lan

: Network Disk DownloadDevelopers. This book covers all aspects of the front-end, background, both front-end developers, or background developers can learn the reference.Architect. The blockchain itself is a model of distributed, cloud computing, and this book describes in detail the architecture of a blockchain product that can be used to learn how blockchain is

there's a file that's transferred from A to B. b First obtain the trusted file Merkle tree, when the file is downloaded, b through the Merkle tree root node and the obtained root node comparison, if not consistent, through the structure of the binary tree can be quickly located in the log (N) complexity of the data block error. Replica Synchronization All the machines in a cluster need to keep the data in sync, and if the data is inconsistent, you need to quickly locate the inconsistent nodes.

Blockchain Enthusiast (qq:53016353) Betting consensus Casper introduced a fundamentally new concept to the open economic consensus as its foundation: betting consensus. The core idea of a betting consensus is simple: provide the validator with an opportunity to bet which block will be finalized for the verification person. The betting on a block x here is a deal, in all chunks of the world where X is processed, the reward is given to the authenticat