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Hyperledger query

The native query language can filter results returned using criteria and can be invoked in transactions to perform operations, such as updating or removing assets on result sets. Queries are defined in a query file (.qry) in the parent directory of the business network definition. Queries contain a WHERE clause, which defines the criteria by which assets or participants are selected Hyperledger Composer's Query language removes those hassles and makes it easy to define queries, in simple notation, and enable your application to take actions based on business-defined criteria. You can then easily consume the queries directly in your application or via the generated query REST APIs How to Query Transaction By ID in Hyperledger Fabric 2.0 Change the working directory and set up the environment. First change the working directory to the test-network... Invoke a chaincode. Now let's invoke the fabcar chaincode to generate one transaction and its ID so that we can query... Query. Query Couch DB directly: In this you write the SDK code to query the ledger directly without going through the chaincode. This is when you know the TX ID or the Block ID. Follow this example to write the SDK for the queries: https://github.com/hyperledger/fabric-samples/blob/release-1.1/balance-transfer/app/query.j Hyperledger Fabric (HLF) uses a key value database to store its state. This object store holds binary data which can be queried using its key. By default fabric uses a LevelDB store which is..

Wallet Query Language ¶. Wallet Query Language. This language will be used to define queries in Non-secrets, Anoncreds search APIs. query = {subquery} subquery = {subquery subquery} - WHERE subquery AND AND subquery subquery = $or: [ {subquery},..., {subquery}] - WHERE subquery OR. A query is a chaincode invocation which reads the ledger current state but does not write to the ledger. The chaincode function may query certain keys on the ledger, or may query for a set of keys on the ledger. Since queries do not change ledger state, the client application will typically not submit these read-only transactions for ordering, validation, and committal. Although not typical, the client application can choose to submit the read-only transaction for ordering.

Hyperledger Explorer is a user-friendly Web application tool used to view, invoke, deploy or query blocks, transactions and associated data, network information (name, status, list of nodes), chain codes and transaction families, as well as any other relevant information stored in the ledger. Hyperledger Composer, Cello, Explorer Explainer Vide Here is an example of the peer chaincode query command, which queries the peer ledger for the chaincode named mycc at version 1.0 for the value of variable a: You can see from the output that variable a had a value of 90 at the time of the query Hyperledger Composer is a very popular Blockchain application development, the popularity is mainly because of it's ease of use. Learn more. One of the key component is the Query language whic chaincode query: By default, the query result is formatted as a printable string. Command line options support writing this value as raw bytes (-r, -raw), or formatted as the hexadecimal representation of the raw bytes (-x, -hex). If the query response is empty then nothing is output In this developer code pattern, we will take a look at how to query the world state of a peer within Hyperledger Fabric. The world state, implemented as a database, contains all of the network history (e.g., transactions issued). Querying the world state is useful for seeing the current state of the assets in the network

Queries Tutorial Hyperledger Compose

Hyperledger Global Forum is the most important annual event for enterprises that adopt consortium blockchain technologies. Hundreds of blockchain enthusiasts come together at the annual Hyperledger Forum to share their user cases and the latest progress on enterprise blockchain technologies. During the conference, I presented on the 10 critical problems and requirements to consider based on. Hyperledger Composer Query using relation 0 votes I have made a query in Hyperledger Composer where in the query tries to search for all invoices of a borrower -AMAZONPOLLY-ONLYWORDS-START- The following tutorial series consists of three articles which will teach you various aspects about Hyperledger Fabric chaincode development ranging from CRUD operations, data protection, and chaincode testing. Part 1 Part 2 Part 3 An overview of the series: Article 1: Basic chaincode development and storing private data in collections Article 2: Advanced. Hyperledger is an open source collaborative effort created to advance cross-industry blockchain technologies. It is a global collaboration, hosted by The Linux Foundation, including leaders in finance, banking, IoT, supply chain, manufacturing and technology Powered by a free Atlassian Jira open source license for Hyperledger Project. Try Jira - bug tracking software for your team

Dummies Guide to Querying a Hyperledger Fabric Blockchain

Archived Create powerful blockchain queries with

  1. Hyperledger Fabric Query Block Service. Syntax: com.ibi.agents.XDFabricQueryBlockAgent. Description: This service queries Hyperledger Fabric for a specific block and returns it. The query will be sent to one of the peers chosen randomly. The search criteria can be a block number, a block hash, or a Transaction ID. The result is a BlockInfo encoded in an XML or JSON parsed tree. In batch mode.
  2. Hyperledger Fabric is an enterprise-grade permissioned distributed ledger framework for developing solutions and applications. Its modular and versatile design satisfies a broad range of industry use cases. It offers a unique approach to consensus that enables performance at scale while preserving privacy. - hyperledger/fabri
  3. I am using Hyperledger Fabric 1.4.1, and trying to send large data to the channel and then query them back. The data size of the transcation I sent is 512KB, and I can query it from peers. Then I tried send it 7 times with same id, I can also get all 7 histories with shim function getHistoryForKey
  4. IBM Hyperledger costs $1000 per month plus an additional $1000 per active node, so in total cost $6000 per month. The cost per transaction is Bitcoin is $1.30 and for Ethereum $0.25 per transaction. In Non-Permissioned blockchain, the per-transaction cost will change based on the current value of cryptocurrency
  5. Implemented only for current query support which is mango query and range query. Map-Reduce view couchdb queries are not yet supported by Fabric. ANALYSIS OF OPTIONS. Alternate options considered (vs cost): Issue: Shim fetches results in batches (of 100) and returns them to chaincode/caller. On the peer, the handler, maintains a QueryIterator.
  6. public-sector-sig@lists.hyperledger.org; Messages; Query; × Close Search. Search Cancel. Single Toggle Dropdown. Messages; Topics; Expanded; Polls; previous page #5; next page; Query DJ EVERETTE #5 . How many retired or existing IBMrs are on this team? Why is the IBMr group inactive? DJE. More. All Messages By This Member; previous page #5; next page; Join public-sector-sig@lists.hyperledger.
  7. Using tail to follow a file without displaying the most recent lines My ex-girlfriend uses my Apple ID to log in to her iPad. Do I have.

Hyperledger Explorer is a user-friendly Web application tool used to view, invoke, deploy or query blocks, transactions and associated data, network information (name, status, list of nodes), chain codes and transaction families, as well as any other relevant information stored in the ledger The following examples show how to use org.hyperledger.fabric.sdk.QueryByChaincodeRequest. These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar. Example 1. Source Project. Hyperledger Explorer provides functionality to view, invoke, deploy, or query blocks, transactions, and associated data, network information, chain codes, and related information stored in the ledger

How to Query Transaction By ID in Hyperledger Fabric 2

Query the ledger; 3. Compiling and deploying Fabric chaincode. Prerequisites; Project structure; configtx; Docker; Cryptogen; Install Binaries, and Docker Images ; Start the PLN network; Monitor the PLN network; Creating PLN channel; 4. Running and testing the smart contract. 5. Developing an application with Hyperledger Fabric through the SDK. Requirements. Basic knowledge of Linux commands. Hyperledger Fabric - Die verteilte Blockchain-Plattform. Mit Fabric als Plattform lassen sich völlig individuelle Distributed-Ledger-Lösungen entwickeln. Fabric beinhaltet Konzepte, die durch Code weitestgehend frei implementierbar sind. Als Basis für ein Blockchain-Netzwerk wird die Modellierung der angestrebten Organisationsstruktur. Hyperledger Fabric is maintained by the Linux Foundation and evangelized by IBM. You'd probably be surprised to hear that Fabric is the most widely adopted blockchain by the biggest enterprises, much more so than your big name blockchains. Companies like Oracle, Accenture, The National Association of Realtors, Deutsche Borse Group, and Sony Global Education have all hitched their.

This piece is about my experience in creating a blockchain PoC application for land and title recording on blockchain leveraging Hyperledger Fabric (HF) blockchain platform The Certified Hyperledger Fabric Developer (CHFD) program allows candidates to demonstrate the knowledge to develop and maintain client applications and smart contracts using the latest Fabric programming model. Who Is It For. CHFD is for developers who want to demonstrate their ability to package and deploy Fabric applications and smart contracts, perform end-to-end Fabric application life. The goal of this document is to show the tasks and provide a baseline for writing your first application against a Hyperledger Fabric network. 本文档将会指引您基于Hyperledger Fabric网络编写第一个应用程序。 At the most basic level, applications on a blockchain network are what enable users to query a ledger (asking for specific records it contains), or to update it (adding. Query Language, Queries in Hyperledger Composer are written in a bespoke query language. by default defines the registry and asset or participant type that is to be returned. Hyperledger Composer includes an access control language (ACL) that provides declarative access control over the elements of the domain model. By defining ACL rules you can determine which users/roles are permitted to. Native Hyperledger Fabric doesn't provide data protection for rich query. However, Berkeley DB contains functionality that protects and validates the rich query by adding the Merkle tree hash value into the read-set, re-executing the rich query, and at the validation stage re-calculating the Merkle tree value. Note that because validation is more accurate i

Query from ledger in hyperledger fabric - Stack Overflo

Query the chaincode; 1. Get the Hyperledger Fabric network details. For the SDK to connect and perform operations on the Hyperledger Fabric network, you need network details like the URLs for peer, ca, orderer, channel name, pem certificates for ca, orderer (as it is TLS enabled), and chaincode details. The network can be set up in different ways. Here's where you can find the network. .everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{.

Technical Introduction to Hyperledger Fabric | AltorosTransaction Flow — hyperledger-fabricdocs master documentation

Hyperledger Fabric & couchdb, fantastic queries and where

  1. 快速入门 - Hyperledger中文文档. 原文. 作者. 审核修正. 原文. Linsheng Yu. Kewei Sun. 本文设定了一个简单的Fabric网络场景,包括2个organization,每个有2个peer,并使用solo ordering服务。. 网络实体所需的加密材料(x509证书)已预先生成并放到相应目录和配置文件里了.
  2. Hyperledger Fabric 1.2系列fabcar: 4. query的执行过程 从上一篇内容我们可以看到,执行 node query.js 之后,返回了 CAR0~CAR9 的信息。 那这整个流程都做了些什么操作
  3. Introduction. Hyperledger Fabric uses state databases to store the ledger records in the World Sta t e.The State Database includes LevelDB and CouchDB to be flexible for the developer to verify the records. LevelDB stores the records in key-value pair whereas CouchDB stores records in JSON format with the rich query to the data collection. Since both state databases maintain key-based mapping.
  4. Use this tutorial to create your first Hyperledger Fabric network, set up a Hyperledger Fabric client on EC2, and use the open-source Hyperledger Fabric peer CLI to query and update the ledger. You then invite another member to the network. The member can be from a different AWS account, or you can invite a new member in your own account to simulate a multi-account network. The new member then.
  5. Hyperledger Fabric - Flexible blockchain application platform. With Fabric as a platform, completely individual distributed ledger solutions can be developed. Fabric contains concepts that can be implemented as freely as possible. The basis for a blockchain network is the modeling of the desired organizational structure. Each participant has a fixed identity and can identify itself through.
  6. g chaincode operations. Note . The Azure Hyperledger Fabric (azhlf) script has been updated to provide more functionality. If you want to refer to the old script, see the readme on GitHub. This script is compatible with Hyperledger Fabric on Azure Kubernetes Service template.
  7. Configure Hyperledger Fabric containers Define network config options (block creation options, etc) Enable TLS for communication Generate genesis block Configure service discovery node (e.g. peer and orderer addresses) Diagnostics and Troubleshooting 15% Query and analyse peer logs Query and analyse CA logs Query and analyse Orderer log

A Hyperledger Composer Query file is a source code file that define queries to retrieve business objects from the Business Network. A access control file uses the Query language and the .qry file extension. Here is an example of an query file from the Fund Clearing Network, queries.qry: /** * Queries for Fund Clearing */ query TransferRequestsByBankInState { description: Select all. 3. Quick Start Guide¶. In this guide, we will create a very basic Iroha network, launch it, create a couple of transactions, and check the data written in the ledger

Wallet Query Language — Hyperledger Indy SDK documentatio

  1. Hashes for hyperledger-.1.5-py2.py3-none-any.whl; Algorithm Hash digest; SHA256: 098e36862cef35c5d31aa605dae265d6355fc90949b8b57224df782be6f98c9b: Cop
  2. Getting Started with Hyperledger Fabric training course is focused on helping IT professionals learn Hyperledger Fabric 2.3 fundamentals and understand enterprise use cases with demos. The course will introduce you to the need for Blockchain applications, use cases, and Hyperledger Fabric, which is the open-source framework for developing Blockchain applications and solutions with a modular.
  3. The Hyperledger Fabric Client SDK provides APIs to create and join channels, install and instantiate chaincode, and query data or invoke transactions. A user interface application that calls the API provided by the RESTful API
  4. hyperledger fabric v1.4.0 linux 环境搭建详细(1) 10600; fabric-sdk-java+springboot实现invoke,query,enroll等示例(3) 6589; 1630 - FUNCTION XXXX.now does not exist. Check the 'Function Name Parsing and Resolution' section in 5433; 解决Failed to restart docker.service: Unit docker.service not found.无需重装 460
  5. 下载hyperledger-fabric-linux-amd64-1..5.tar.gz压缩包 如果想返回某个车辆信息,编辑query.js ,我们将函数queryAllCars更改为queryCar并将特定的Key 传递给args参数。在这里,我们使用CAR4。 所以我们编辑后的query.js程序现在应该包含以下内容: 编辑query.js. 重新运行query.js; node query.js. image.png. FAQ. 运行./byfn.sh.
  6. Hyperledger Composer is an application development framework that helps us to simplify the creation of Hyperledger Fabric Blockchain applications. This course has been designed in such a way that you will get a thorough understanding of how the build Blockchain applications and deploy over the Hyperledger Fabric Blockchain. This is a very specific course which explains how to use Hyperledger.
  7. How to query similar word in Hyperledger-composer? like LIKE in sql, how to sovle that. Thank you. hyperledger-composer . share | improve this question. asked Nov 13 '18 at 8:04. Suriya Warasit Suriya Warasit. 6 1.

Read (query) transaction flow in Hyperledger Fabric

Introduction¶. Hyperledger Explorer is a tool for visualizing blockchain operations of the Hyperledger Fabric platform. It is the first ever blockchain explorer for permissioned ledgers, allowing anyone to explore the distributed ledger projects being created by Hyperledger's members from the inside, without compromising their privacy flexible query functions for real applications built on Fabric, this paper proposed a ledger data query platform called Ledgerdata Refiner. With ledger data analysis middleware, we provide sufficient interfaces for users to retrieve block or transaction efficiently. It is also able to track historical operations for any specific state. In addition, schemas of ledger state have been analyzed.

Hyperledger Explorer - Hyperledge

peer chaincode — hyperledger-fabricdocs master documentatio

Ich versuche, eine dynamische Abfrage zu erstellen, und ich kann anscheinend keine Dokumentation finden, die helfen würde. Ich habe die folgende Transaktion. Ich möchte eine Abfrage erstellen, die möglicherweise eine beliebige Anzahl annehmen kan Query; Hyperledger Fabric에 대해 알아 보았따. 이제 직접 개발 환경은 올려보자. 개발을 위한 환경 . docker; go; virtualBox; Docker VM환경 생성. 물론 default환경을 사용해도 좋지만 나중에 여러개의 node를 올려보기 위해서 미리 분리를 하도록 하자. 1 $ docker-machine create --driver virtualbox blockchain 다음으로 생성된 VM의. We will use Yeoman to generate a businessnetwork project template. Here, we need to modify the provided template files

Hyperledger Fabric | How Hyperledger Fabric Architecture

Understanding Hyperledger Composer Query Language by

Hyperledger IrohaのPythonライブラリを使ってアカウントを作成します。 準備. アカウントのキーペア作成に必要になるライブラリをインストールしておきます. pip install ed25519 実装 アカウントの作成. 早速アカウントを作成するコードです. create_account.py. from iroha import Iroha, IrohaCrypto, IrohaGrpc import ed25519. Hyperledger IrohaのPython SDKを使って、 ・Assetの作成 ・Assetの送信 ・ブロック情報の取得 を行ってみます。 前提 ・irohaの公式ガイドに従って環境構築が出来ていること ・Python3が使える環境であること. 参考. Iroha Python Libraryドキュメン When starting Hyperledger Besu, if the --node-private-key-file option is not specified and a key file does not exist in the data directory for the node, Besu generates a node private key and writes it to the key file. If a key file does exist in the data directory when starting Besu, the node starts with using private key in the key file. Info. The private key is not encrypted. Node public key. Hyperledger Composer Extension for VSCode. Validate Composer models that define the structure of your business network in terms of Assets, Participants and Transactions. This VSCode extension parses '.cto' files using the Hyperledger Composer parser and reports any validation errors. It will also parse and validate Hyperledger Composer 'permissions.acl' files and query files ('.qry'). To work.

Command Line Interface - Hyperledger Fabri

A Hyperledger Fabric Query is a GET operation provided by a chaincode on a channel on a Hyperledger Fabric network to return the current state of a given asset. In order to perform a query operation, you need to prepare the following: Asset ID - Identifies the Asset for which you want to get the current state. Chaincode ID - Identifies the chaincode who manages the given asset. Channel ID. How to Query REST API. So, when I am running the hyperledger and am connected through the REST API on Localhost 3000, I see how I can retrieve things on the blockchain, but how can I retrieve data through ID's on a website? I want to be able to have people type in an id and it display data without them being able to access whats on localhost 3000. 2 comments. share. save. hide. report. 100%. Query about which hyperledger to use. I'm working on an embedded project that is built on linux platform, code mostly done in C++. I'm thinking of simply using hyperledger fabric, but I'm not sure about integrating fabric in with my existing code. My embedded system will have a touch screen on it. I'm not sure if that is even relevant information. I would like for different individuals to see. Hyperledger Fabric FAQ How do I query the ledger data? A. Within chaincode you can query based on keys. Keys can be queried by range, and composite keys can be modeled to enable equivalence queries against multiple parameters. For example a composite key of (owner,asset_id) can be used to query all assets owned by a certain entity. These key-based queries can be used for read-only queries. 3.3 Query Aggregated Car. To create the aggregated car object, we will query both the Hyperledger network and the private data collection containing our car owner and address. First, let's retrieve the public car with: let publicCar = await stubHelper.getStateAsObject(verifiedArgs.key); Next, we can query the private car data in the same manner

Explore the querying capability of Hyperledger Fabric 1

Bereitstellen eines Hyperledger Fabric-Konsortiums in Azure Kubernetes Service (AKS) 03/01/2021; 16 Minuten Lesedauer; P; o; In diesem Artikel. Sie können die Vorlage für Hyperledger Fabric auf Azure Kubernetes Service (AKS) verwenden, um ein Hyperledger Fabric-Konsortiumsnetzwerk in Azure bereitzustellen und zu konfigurieren The Hyperledger Fabric platform supports Go, Node and Java as main programming languages for chaincodes; however, A request for data is called query. The OraclizeQuery_sync is a function, implemented in the oraclizeapi.go Go package, which expects three arguments: A data-source such as URL, WolframAlpha, IPFS, Swarm and others listed here; The argument for the given data-source; for. Hyperledger Explorer: This project is designed to create a user-friendly Web application. It can view, invoke, use or query the blocks, transactions, and associated data, network information (name, status, list of nodes), chain codes, as well as any other relevant information stored in the public ledgers of the blockchain. Query some HyperLedger chaincode from Go. GitHub Gist: instantly share code, notes, and snippets. Skip to content. All gists Back to GitHub Sign in Sign up Sign in Sign up {{ message }} Instantly share code, notes, and snippets. dolanor / chaincode_query.go. Created Feb 20, 2017. Star 0 Fork 0; Star Code Revisions 1. Embed. What would you like to do? Embed Embed this gist in your website. By using Hyperledger Fabric on Azure Kubernetes Service (HLF on AKS) template in Azure, you can soon start Hyperledger Fabric without spending time building out the infrastructure. In this post, I show you both architecture and usage (how to use) for this template

GitHub - hyperledger-labs/blockchain-verifier: bcverifier

  1. Hyperledger Fabric CA consists of both a server and a client component as described later in this document. For developers interested in contributing to Hyperledger Fabric CA, see theFabric CA repositoryfor more information. 1.1Table of Contents 1. Overview 2. Getting Started (a) Prerequisites (b) Install (c) Explore the Fabric CA CLI 3.
  2. 21 Future plans • #543 Complex query: a SQL-like Composer query language for querying assets and participants on the Blockchain. - Requires CouchDB support from Hyperledger Fabric v1.0. • #55 Historian: a new component that records all events that occur in the business network, including the modifications to assets. • #898 Links: the ability to share and access data between multiple.
  3. Presently, Hyperledger Fabric offers a variety of chaincode implementation choices: Go, JavaScript, Java and an implementation of the Hyperledger Burrow Ethereum Virtual Machine (EVM) that supports execution of smart contract bytecode compiled from one of the Ethereum-smart contract languages such as Solidity. As with the SDK, choosing Go or Java for your chaincode may yield performance.
  4. Blockchain is a key technology that has the potential to decentralize the way we store, share, and manage information and data. One of the more recent blockchain platforms that has emerged is Hyperledger Fabric, an open source, permissioned blockchain that was introduced by IBM, first as Hyperledger Fabric v0.6, and then more recently, in 2017, IBM released Hyperledger Fabric v1.0

Query the State Databas

  1. Hyperledger Fabric provides channels, which can make the fisherman agree with both buyers privately without anyone knowing the specifics. Regulators. Their role is to confirm, verify, and view details on the ledger. Their application will query the ledger and check the details to confirm whether the fisherman has legally caught the fish or not.
  2. Hyperledger Composer, one of the Hyperledger projects hosted by The Linux Foundation, aims to solve this problem by making it easy for blockchain developers to model business assets, participants.
  3. g at.
  4. Hyperledger Composer is a new open source project which makes it easy for developers to write chaincode for Hyperledger Fabric and the decentralized applications (DApps) that can call them. This.
  5. 訂閱這個網誌. How can I return the Query result from a Transaction in Hyperledger Composer.
  6. ating the infrastructure tasks that would normally be involved.

Hyperledger Composer How to query using string Edureka

Latency - Query Fabric 0.6 Fabric 1.0 30 40 50 seconds Latency - Query Fabric 0.6 F ˘ : Averagelatencyforqueryfunction. 0.084 0.52 5.18 46.147 0.022 0.205 1.37 10.97 0 10 20 30 40 50 10 100 1000 10000 seconds #transactions Latency - Invoke Fabric 0.6 Fabric 1.0 20 30 40 50 10 100 1000 10000 #transactions Latency - Invoke Fabric 1.0 F. Hyperledger Explorer can view, invoke, deploy or query blocks, transactions and associated data, network information, chain codes and transaction families and any other relevant information stored in the ledger. Hyperledger Composer is a collaboration tool for building blockchain business networks, accelerating the development of smart contracts and their deployment across a distributed ledger.

peer lifecycle chaincode — hyperledger-fabricdocs master

10 Practical Issues for Blockchain - Hyperledge

Hyperledger Explorer is a blockchain module and one of the Hyperledger projects hosted by The Linux Foundation. Designed to create a user-friendly Web application, Hyperledger Explorer can view, invoke, deploy or query blocks, transactions and associated data, network information (name, status, list of nodes), chain codes and transaction families, as well as any other relevant information. API methods enabled by default . Besu enables the ETH, NET, and WEB3 API methods by default.. To enable the ADMIN, CLIQUE, DEBUG, EEA, IBFT, MINER, PERM, PLUGINS, PRIV, TRACE, and TXPOOL API methods, use the --rpc-http-api or --rpc-ws-api options.. Block parameter . When you make requests that might have different results depending on the block accessed, the block parameter specifies the block

Java chaincode¶. Note: This guide generally assumes you have followed the Chaincode development environment setup tutorial Hyperledger 源码分析之 Fabric. Hyperledger 源码分析之 Fabric. Hyperledger 源码分析之 Fabri Hyperledger Explorer can view, invoke, deploy or query blocks, transactions and associated data, network information, chain codes and transaction families, as well as any other relevant information stored in the ledger. Hyperledger Quilt. Hyperledger Quilt offers interoperability between ledger systems by implementing ILP, which is primarily a payments protocol and is designed to transfer. Install Hyperledger Fabric on Ubuntu 16 and execute Deploy, Invoke and Query - Part I There is an entire library of Blockchain APIs which you can select according to the needs that suffice your application

Build a Blockchain PoC Application using Hyperledger FabricConnect the IBM Blockchain Platform to Hyperledger FabricFabric chaincode lifecycle — hyperledger-fabricdocs masterHyperledger Fabric和VSCode的IBM区块链扩展开发智能合约 | 学习软件编程The Dock on Twitter: "This weekend, Accenture
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