Compiling and deploying an Ethereum Smart Contract, using solc and web3.

web3-solc-contract-compile-deploy.js

const fs = require('fs');
const solc = require('solc');
const Web3 = require('web3');

// Connect to local Ethereum node
const web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545"));

// Compile the source code
const input = fs.readFileSync('Token.sol');
const output = solc.compile(input.toString(), 1);
const bytecode = output.contracts['Token'].bytecode;
const abi = JSON.parse(output.contracts['Token'].interface);

// Contract object
const contract = web3.eth.contract(abi);

// Deploy contract instance
const contractInstance = contract.new({
    data: '0x' + bytecode,
    from: web3.eth.coinbase,
    gas: 90000*2
}, (err, res) => {
    if (err) {
        console.log(err);
        return;
    }

    // Log the tx, you can explore status with eth.getTransaction()
    console.log(res.transactionHash);

    // If we have an address property, the contract was deployed
    if (res.address) {
        console.log('Contract address: ' + res.address);
        // Let's test the deployed contract
        testContract(res.address);
    }
});

// Quick test the contract

function testContract(address) {
    // Reference to the deployed contract
    const token = contract.at(address);
    // Destination account for test
    const dest_account = '0x002D61B362ead60A632c0e6B43fCff4A7a259285';

    // Assert initial account balance, should be 100000
    const balance1 = token.balances.call(web3.eth.coinbase);
    console.log(balance1 == 1000000);

    // Call the transfer function
    token.transfer(dest_account, 100, {from: web3.eth.coinbase}, (err, res) => {
        // Log transaction, in case you want to explore
        console.log('tx: ' + res);
        // Assert destination account balance, should be 100 
        const balance2 = token.balances.call(dest_account);
        console.log(balance2 == 100);
    });
}

Hi guys,

I am currently trying to adopt this source code for my school project. But may I know what is the folder structure for this project? Because I can't seemed to grasp how the code retrieve the Token.sol (Line 9)