Follow the instructions to set up Blockchain Workbench.<\/li>\n<\/ol>\nOnce you have set up Blockchain Workbench on Azure, you need to set up your local development environment by installing the Azure Blockchain Workbench extension for Visual Studio Code.<\/p>\n
To install this extension, open Visual Studio Code and navigate to the Extensions view. Search for Azure Blockchain Workbench<\/code>, then select Install<\/code>.<\/p>\nStep 2: Creating a Blockchain Application on Azure Blockchain Workbench<\/h2>\n
Once you have your development environment set up, you can create your first blockchain application. We will create a simple application to demonstrate the process.<\/p>\n
Step 2.1: Creating an Azure Blockchain Workbench Project<\/h3>\n
To create a new project in Azure Blockchain Workbench, follow these steps:<\/p>\n
\n- Open Visual Studio Code and click on
File > New Project<\/code>.<\/li>\n- Select
Azure Blockchain Workbench Project<\/code>.<\/li>\n- Name your project and choose where to save it.<\/li>\n
- Select
Create<\/code>.<\/li>\n<\/ol>\nStep 2.2: Creating a JSON Definition File<\/h3>\n
The next step is to create a JSON definition file that defines your blockchain application’s functionality. Here is an example of what a simple JSON definition file might look like:<\/p>\n
{\n \"$schema\": \"https:\/\/blockchainworkbench.azure.com\/schemas\/definition-2021-03-01.json#\",\n \"name\": \"MyFirstBlockchainApplication\",\n \"description\": \"A simple blockchain application\",\n \"version\": \"1.0.0\",\n \"author\": \"Your Name\",\n \"packageName\": \"com.example.myfirstblockchainapplication\",\n \"connectionProfiles\": [\n {\n \"name\": \"myconnection\",\n \"description\": \"My connection profile\",\n \"key\": \"**********\",\n \"type\": \"FABRIC\"\n }\n ],\n \"applicationProfiles\": [\n {\n \"name\": \"myApplication\",\n \"description\": \"My application profile\",\n \"state\n\ns\": [\n {\n \"name\": \"active\",\n \"description\": \"The active state\",\n \"visible\": true,\n \"initial\": true,\n \"transitions\": [\n {\n \"name\": \"deactivate\",\n \"description\": \"Transition to the deactivated state\",\n \"to\": \"deactivated\",\n \"conditions\": []\n }\n ]\n },\n {\n \"name\": \"deactivated\",\n \"description\": \"The deactivated state\",\n \"visible\": true,\n \"initial\": false,\n \"transitions\": [\n {\n \"name\": \"activate\",\n \"description\": \"Transition to the activated state\",\n \"to\": \"active\",\n \"conditions\": []\n }\n ]\n }\n ]\n }\n ],\n \"assets\": [\n {\n \"name\": \"MyAsset\",\n \"description\": \"An asset \n\nin my blockchain application\",\n \"visibility\": \"public\",\n \"state\": \"active\",\n \"tags\": [],\n \"applicationProfileName\": \"myApplication\"\n }\n ]\n}\n<\/code><\/pre>\nThe JSON definition file contains information such as the application name, author, and version, as well as connection profiles, application profiles, and assets.<\/p>\n
Step 2.3: Compiling the Project<\/h3>\n
Now that you have created your JSON definition file, you are ready to compile your project. To do this, follow these steps:<\/p>\n
\n- Open Visual Studio Code and go to the
Azure Blockchain Workbench Explorer<\/code>.<\/li>\n- Right-click on your project and select
Compile Smart Contracts<\/code>. <\/li>\n<\/ol>\nYou should see a console output that shows the progress of your project’s compilation. If everything is successful, you should see a message indicating that the project has been compiled successfully.<\/p>\n
Step 2.4: Deploying the Project<\/h3>\n
After compiling your project, the next step is to deploy it to Azure Blockchain Workbench. Here’s how:<\/p>\n
\n- Go to the
Azure Blockchain Workbench Explorer<\/code> in Visual Studio Code.<\/li>\n- Right-click on your project and select
Deploy to Blockchain Workbench<\/code>.<\/li>\n- Wait for the process to complete.<\/li>\n<\/ol>\n
Once your project is successfully deployed, you should be able to see it in Azure Blockchain Workbench’s Applications<\/code> tab.<\/p>\nStep 2.5: Testing the Application<\/h3>\n
To test your application, follow these steps:<\/p>\n
\n- Go to your project folder in Visual Studio Code and open the
test<\/code> folder.<\/li>\n- Open
test.js<\/code> and replace the sample code with the following:\nconst dotenv = require('dotenv');\nconst axios = require('axios');\nconst { Client, Identity } = require('@textile\/threads-client');\n\nconst record = { \n patientName: \"Alice\",\n age: 30,\n weight: 65.2\n};\n\n(async function () {\n dotenv.config();\n\n try {\n\n console.log(`Creating Identity...`);\n const identity = await Identity.fromRandom();\n\n console.log(`Creating Client...`);\n const client = await Client.withKeyInfo({\n key: process.env.KEY,\n secret: process.env.SECRET\n });\n\n console.log(`Creating Database...`);\n const db = await client.newDB();\n\n console.log(`Database Created with ID: ${db.dbID}`);\n console.log(`Database Information: `, db);\n\n console.log(`Inserting Record...`);\n const insert = await db.create(identity, record);\n\n let result = await db.has(insert);\n if(result) {\n console.log(`Record Inserted Successfully with ID: ${insert}`);\n } else {\n console.log(`Record Insert Failed`);\n }\n\n console.log(`Fetching Record...`);\n const filter = { patientName: 'Alice' }\n const query = await db.find(filter);\n\n if(query.length > 0) {\n console.log(`Record Fetched Successfully: `, query[0]);\n } else {\n console.log(`Record Fetch Failed`);\n }\n\n } catch (err) {\n console.log(`Error Occured: ${err.message}`);\n }\n})();\n<\/code><\/pre>\n<\/li>\n- Save the file and close it.<\/p>\n<\/li>\n
- \n
Go to the console and run the following command to install the necessary packages:<\/p>\n
npm install dotenv axios @textile\/threads-client\n<\/code><\/pre>\n<\/li>\n- Run the following command to execute the test file:\n
node test.js\n<\/code><\/pre>\n<\/li>\n<\/ol>\nIf everything runs successfully, you should see output in the console that indicates that the record was successfully created and retrieved.<\/p>\n
That’s it – you have created and deployed your first blockchain application!<\/p>\n
Conclusion<\/h2>\n
In this tutorial, we covered the basics of Azure Blockchain Workbench and provided step-by-step instructions on how to create and test a simple blockchain application. By following these steps, you should now have an understanding of how to use Azure Blockchain Workbench to develop and manage blockchain applications.<\/p>\n","protected":false},"excerpt":{"rendered":"
Introduction Blockchain technology has grown considerably over the last few years, with various use cases emerging across different industries. However, the development and management of blockchain-based applications can be challenging, especially for developers who lack expertise in decentralized ledger technologies. This is where Azure Blockchain Workbench comes in. 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