shubhamoy / HelloEthereum

A quick hands-on experience with Ethereum Smart Contract Development

Hello Ethereum

It is the simplest implementation of Smart Contract to get a quick hands-on with the intricacies of ethereum development.

• Build and interact with a smart contract
• Test the smart contract
• Visualise everything using Ganache

Dedicated

This repo is dedicated to all the members of Facebook Developer Circles, Delhi.

How to begin?

1. Install truffle $> npm install -g truffle
2. Download ganache from (https://truffleframework.com/ganache)
3. Run Ganache
4. Clone this repo $> git clone https://github.com/shubhamoy/HelloEthereum
5. $> truffle migrate --network ganache
6. After completion of the above command, switch to Ganache and it should show the contract creation and contract calls.

Interact with the Smart Contract

1. Open Truffle Console and connect it to Ganache $> truffle console --network ganache
2. Create instance of the smart contract truffle(ganache)> Election.deployed().then((instance) => { app=instance })
3. Get the vote count truffle(ganache)> app.count.call().then(count => count.toNumber())
4. Call the upvote method truffle(ganache)> app.upvote({from: web3.eth.accounts[1]})
5. Call the upvote method truffle(ganache)> app.upvote({from: web3.eth.accounts[2]})
6. Finally, check the vote count value truffle(ganache)> app.count.call().then(count => count.toNumber())

Testing the Smart Contract

1. Test Cases ./test/Election_Test.js
2. Test the contract $>truffle test --network ganache

Troubleshoot

1. If you are unable to connect to Ganache, then after running Ganache check for the host and port. In case, it isn't running on http://localhost:7545 then update the truffle.js file with the new host and port details.
2. For any other problem, please raise an issue.

Contact

me[at]shubhamoy[dot]com