Your_First_Decentralized_Application
This is the code for "A Guide to Building Your First Decentralized Application" by Siraj Raval on Youtube
Overview
This is the code for this video on Youtube by Siraj Raval. It's a guide on how to build your first decentralized application.
Dependencies
- ethereumjs-testrpc
- web3@0.20.1
- solc
Install missing dependencies with npm.
> git clone git@github.com:llSourcell/Your_First_Decentralized_Application.git
> cd Your_First_Decentralized_Application
> npm install
Usage
After all dependancies are installed, run the testrpc service with:
node_modules/ethereumjs-testrpc/build/cli.node.js
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 = VotingContract.new(['Rama','Nick','Jose'],{data: byteCode, from: web3.eth.accounts[0], gas: 4700000})
> deployedContract.address
> contractInstance = VotingContract.at(deployedContract.address)
Interact with the contract via the html page attached, just open it in your browser. See this tutorial for more details.
Credits
The credits for this code go to maheshmurthy. I've merely created a wrapper to get people started.