hyperledger sawtooth

Test instructionsUse x large m to divide a plane into several blocks.is the enhanced version of the polyline cut plane.A simple recursive formula: F (x+1) = 16x+1+f (x)Then turn it into a pass-through formula, and then C + + bit-press the large number simulation#include HDU 5047 Sawtooth Law + C + + large number simulation ACM/ICPC Asia regional Shanghai Online

00 Introduction The open source Blockchain distributed ledger--hyperledger Fabric, launched by the Linux Foundation, has ushered in the 1.2.0 version. The project focuses on performance and reliability, as well as cross-industry collaboration to drive blockchain and distributed ledger technology. Hyperledger Fabric can be used for scenarios such as global supply chain management, financial transactions, ass

: $PATH Exit Edit and enter the following command to make the changes effective: Source/etc/profile Enter the following command to see if the installation was successful: Go version If it appears: Go version go1.9.2 LINUX/AMD64 indicates a successful configuration. As for Gopath, this is the directory where the Go program runs, that is, all the go programs you write are placed in this directory. Based on the above configuration, we create a new Gopath folder in the ~ directory and then create

the code The preferred need is to determine that the go environment is installed and properly configured. For the sake of simplicity, we use the following command: Mkdir-p $GOPATH/src/asset cd $GOPATH/src/asset Next, we create the source file Touch Asset.go 2.2 Introduction Package Each Chaincode implements the Chaincode interface Package main Import ( "FMT" "Github.com/hyperledger/fabric/core/chaincode/shim" " github.com/

I. Concepts Hyperledger is a umbrella project of open source Blockchains and related tools, started in December 2015 by the Linux Foundation, to support the collaborative development of blockchain-based ledgers. Hyperledgerfabric is a subproject based in Openblockchain denoted by IBM. Hyperledger Fabric is a platform for distributed ledger solutions, underpinned from a modular architecture delivering high D

If the currency block chain technology represented by the Bitcoin is 1.0, and the contract block chain technology represented by the Ether Square is 2.0, then the Hyperledger project which realizes the complete permission control and the security guarantee will undoubtedly represent the arrival of the block Chain Technology 3.0 ERA. The Hyperledger project currently consists of fabric,

Password. Password: # Number of retries for CouchDB errors maxretries:3# Number of retries for CouchDB errors during peer startup Maxretriesonstartup:10# CouchDB Request Timeout (unit:duration, e.g. 20s) requesttimeout:35s # Limit on the number of Reco RDS to return per query Querylimit:10000 COUCHDB is hosted in a Docker container by using a Docker compose script that uses Hyperledger fabric to set COUCHDB username and password capabilities thr

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. Catalogue

as a standalone database process with peer, so there are additional considerations for setup, management, and operation. We can consider starting with the default embedded Leveldb, which can be transferred to COUCHDB if additional complex rich queries are required. Modeling Chaincode Asset data as JSON is a good practice so that we can execute the complex rich queries we need in the future. Two. Enable Couchdb This article uses the relevant components and resources in the Fabric-samples in the

variable: Enter the. BASHRC Configuration environment variable: $ sudo vim ~/. BASHRC or: $ sudo vim/etc/profile Add 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 is successful.1.3.2 node. js Download node. js $ CURL-SL https:// Install node. js sudo Install -y Nodejs 　　 Check

There is a entire library of Blockchain APIs which you can select according to the needs that suffice your application. Some Libraries is open-sourced and Some are private. For examples, IBM ' s Hyperledger Fabric Project, Ethereum, Openchain, Multichain is few of the open sourced models which a Re popular in the industry today.This tutorial aims to help you get started and setup your development environment for a blockchain application using the I Bm

Environment Construction: Necessary environmental dependencies: Environment construction Quick Start: http://hyperledger-fabric.readthedocs.io/en/release-1.1/getting_started.html Premise Install Git $ sudo apt update$ sudo apt install git Installing Curl $ sudo brew install curl Install Vim $ sudo apt install vim Installing Docker $ sudo apt update$ docker --version$ sudo apt install docker.io View Docker version Information Version 1.12+ $ docker --v

0x00 In fabric, peer is an important binary program, its function is mainly to provide peer related operations, regarding peer concept, can refer to official Document 1 and Official Document 2, peer this CLI tool, as a client, can be launched to the Blockchain Network ( channel ) peerrelated from the operation, this command contains a lot of sub-commands, this article will not be introduced, this is not the purpose of this article, this article is mainly through the analysis of the peer source c

first of all thanks to the dark blue habitat, this tutorial is based on his tutorial [http://www.cnblogs.com/studyzy/p/7437157.html] collation, block chain technology developed quickly, in the great God's tutorial a little to add. In addition, there are also in the learning block chain students can contact me, we learn from each other. In the first contact with Hyperledger, very confused, do not know where to start. The tutor suggested that I not on

1, Environmental structure Description:The system uses the container to run, the construction process is simple, each component division of labor is clear:1.docker-compose:docker container management;2.Go Lang Sdk:go language development, compilation environment;3.git:git Mirror Clone and commit;4.Rest client:rest API test;The main operations of the container are: Membersrv and peer; 2. Deployment Environment Readiness 3. Installation and Deployment3.1 Pulling the mirror from the DockerhubA. Ins

Docker-compose Installation of Docker On the command line, enterdocker --versionIf it is already installed, it will show the initial version number, if not installed, will prompt us to install the commandsudo apt install docker.ioAfter the installation is completed docker-verison , the version number is displayed, even if the installation is complete. Environment construction Quick Start: http://hyperledger-fabric.readthedocs.io/en/release-1.1/get