by llSourcell

This is the code for "A Guide to Building Your First Decentralized Application" by Siraj Raval on Yo...

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This is the code for "A Guide to Building Your First Decentralized Application" by Siraj Raval on Youtube


This is the code for this video on Youtube by Siraj Raval. It's a guide on how to build your first decentralized application.


Install missing dependencies with npm.

> git clone [email protected]:llSourcell/Your_First_Decentralized_Application.git
> cd Your_First_Decentralized_Application
> npm install 


After all dependancies are installed, run the

service with:

Run the following commands to open the node console then deploy your contract to the test chain

siraj:~/hello_world_voting$ node
> Web3 = require('web3')
> web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545"));
> code = fs.readFileSync('Voting.sol').toString()
> solc = require('solc')
> compiledCode = solc.compile(code)
> abiDefinition = JSON.parse(compiledCode.contracts[':Voting'].interface)
> VotingContract = web3.eth.contract(abiDefinition)
> byteCode = compiledCode.contracts[':Voting'].bytecode
> deployedContract =['Rama','Nick','Jose'],{data: byteCode, from: web3.eth.accounts[0], gas: 4700000})
> deployedContract.address
> contractInstance =

Interact with the contract via the html page attached, just open it in your browser. See this tutorial for more details.


The credits for this code go to maheshmurthy. I've merely created a wrapper to get people started.

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