This is the UPDATED code for "A Guide to Building Your First Decentralized Application" by Siraj Raval on Youtube
This is the UPDATED code for this video on Youtube by Siraj Raval. It's a guide on how to build your first decentralized application.
- "ethereumjs-testrpc": "^6.0.3"
- "solc": "^0.4.19"
- "web3": "^1.0.0-beta.27"
Install missing dependencies with npm.
> git clone [email protected]:jagarzone6/Your_First_Decentralized_Application.git
> cd Your_First_Decentralized_Application
> npm install
After all dependancies are installed, run the testrpc service with:
node_modules/ethereumjs-testrpc/build/cli.node.js
Or use Ganache for run the Ethereum localnet ( Suggested ):
Run the following commands to open the node console then deploy your contract to the test chain
$ 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)
> byteCode = compiledCode.contracts[':Voting'].bytecode
> var accounts;
> var account;
> web3.eth.getAccounts().then(function(result){ this.accounts = result; this.account = accounts[0]; });
> voteContract = new web3.eth.Contract(abiDefinition, { from: account });
> voteContract.deploy({data: byteCode, arguments: [[web3.utils.fromAscii('Rama'),web3.utils.fromAscii('Nick'),web3.utils.fromAscii('Jose')]]}).send({ from: account, gas: 1500000}).on('error', function(error){ console.log(error) }).then(function(newContractInstance){ console.log(newContractInstance.options.address) });
Replace the contract address with the newContractInstance.options.address, within the index.js file:
contractAddress = '0x84572a574ce1cfE122DDe9bF774E2F6023B28f3f';
The credits for this code go to maheshmurthy. I've merely created a wrapper to get people started.