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First, start the process of developing code on the Java chain 1. Make sure you have grandle tools.2. Download the binary distribution package from the http://gradle.org/gradle-download/3. Unpack, move to the location you want, add the Grandle Bin directory to the system path4. Ensure that the GRANDLE-V command can be executed, the version shown is 2.12 or higher5. Ensure Grandle daemon can be quickly created6. Make sure you've turned jdk8.0 and also make sure that the Java directory is in your p
What has been harvested and what has been done is an important issue.This article is only to learn to exchange information, personal summary. A brief analysis of Hyperledger fabric PBFT algorithm Architecture
Fabric Consensus algorithm code is all in the Consensus folder, consensus folder is mainly divided into Controller,executor,helper,noops,pbft,util file modu
complete, unzip to the/usr/local directory:sudo tar -c/usr/local-xzf go1.10.1.linux-amd64.tar.gz To configure the GO locale variable:Enter the. BASHRC Configuration environment variable:$ sudo vim ~/. BASHRC or: $ sudo vim/etc/profileAdd the following code to the last side:Export gopath=/usr/local/goexport path= $GOPATH/bin: $PATH Save, exit.To make an environment variable effective:$ source ~/. BASHRC or: $ source/etc/profile After viewing the version number no problem, the configuration
First, preparatory work
1. Through the tutorial-"(i) Hyperledger fabric in the CentOS7.2 64-bit system development environment build" to determine has been downloaded Hyperledger Fabric official sample codes.
ii. generation of networks 1. Generate Network Identification
CD
Results after successful execution:
2. St
the Go programming language installed and your system is configured correctly.
Now you need to create a subdirectory under your $gopath/src/to store your link code program.
To make things simple, we provide a simple instruction:
Mkdir-p $GOPATH/src/sacc cd $GOPATH/SRC/SACC
We create a source file:
Touch Sacc.go
Housekeeping (coded)
First let's prepare the code. Like every chain code, it implements the Init and invoke functions of the chain code. So let's use the GO Import statement to impo
Note: This article was first published on 2017-09-22.
Hyperledger source code Analysis of Fabric introduction
The Chaincode is the user chaincode,ucc, which is important for application developers, and it provides state processing logic based on the blockchain distributed ledger, which can be used to develop a variety of complex applications.
Hyperledger
Hyperledger source code Analysis of Fabric
The sorting service plays a very central role in the Super Ledger Fabric network. All transactions need to be sorted globally before they are sent to committer for validation acceptance.
In the current architecture, the function of the sorting service is extracted, as a separate Fabr
("Creating consensus plugin%s", plugin)
Return PBFT. Getplugin (Stack)
}
Logger. Info ("Creating default consensus plugin (noops)")
Return Noops. Getnoops (Stack)
}
The controller directory is a function of the consensus plug-in selection moduleThe---->hyperledger provides two algorithms pbft and Noops----> Default single node Usage noops is equivalent to no consensus algorithm
Func newconsenter (Stack consensus. Stack) consensus. Consenter
Hyperledger source code Analysis of Fabric
Deliver means that the client obtains data from the ordering service via the Grpc interface (for example, data from a specified block).
The Orderer node receives the request message, which is first given to the Deliver of the server structure in the Orderer.common.server package (SRV ab. Atomicbroadcast_deliverserver) Error method processing. This method further in
Hyperledger source code Analysis of Fabric
Broadcast means that the client sends the request message (for example, after the endorsement transaction is completed) to the ordering service via the Grpc interface.
These request messages are given to the broadcast (SRV ab) of the server structure in the Orderer.common.server package. Atomicbroadcast_broadcastserver) Error method processing. This method will mai
Fabric-sdk-java build and compile (this article is based on 1.0.1 version)
1, install jdk1.8 and above version
2, download Fabric-sdk-java GitHub address: Https://github.com/hyperledger/fabric-sdk-java
3. Import into Eclipse tools
4, switch to the project directory under the Command Window mode of execution: MVN co
The entities involved in Hyperledger Fabric 1.0 include the following:
FABRIC-CA: Mainly responsible for the maintenance of the certificate of the entity in the network;
Peer: mainly responsible for the implementation of intelligent contracts, record books;
Order: mainly responsible for the accounting content of the consensus.
1.0 architecture can be based on
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
Hyperledger source code Analysis of Fabric
The Orderer node startup is implemented by the main () method under the Orderer package and further calls to the main () method in the Orderer/common/server package.
The core code is shown below.
Main is the entry point of Orderer Processfunc main () {
fullcmd: = Kingpin. Mustparse (app. Parse (OS. Args[1:])
//"version" command
if Fullcmd = = version.
Hyperledger Fabric Super Ledger
The basic principles of the project agreement are: attaching importance to the modular design, including the trade, contract, consistency, identity, storage and other technical scenarios; Code readability ensures that new features and modules can be easily added and extended, evolving paths that evolve and evolve new projects as needs go deeper and more scenarios are applied
IBM Blockchain Series Hyperledger, in addition to the most core of the fabric network also out a series of tools and engineering, this is recorded under the Blockchain browser installation deployment, the current version is to use the PostgreSQL database to store data (previous version using MySQL).Browsers use Psql and Nodejs to develop, so for Java or Golang sm
Prerequisite conditions
CentOS 7.4 64-bit
Install Docker and configure the Aliyun accelerator
Install Docker Compose
Install Golang
Because of the forbidden relationship, there is no way to direct access to the golang.org site, but the domestic download site a lot of their own Baidu can be.
My installation path is/usr/local/src/go
Edit/etc/profile file Add related environment variables as follows
Install Git
Yum Install git
Download
Super Ledger Hyperledger Cello installation deployment and simple use
Cello GitHub
Hyperledger Cello helps manage blockchain networks effectively. use to quickly build a blockchain-as-a-service (BaaS) platform. Immediately provide customizable blockchain, such as Hyperledger Fabri
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