index.js

let fs = require('fs');
let solc = require('solc');
let co = require('co')
let path = require('path')

let trustcoinSourcePath = path.join(__dirname, './contracts/Trustcoin.sol')
let trustcoinDepPath = path.join(__dirname, './contracts/deps/ERC20TokenInterface.sol')

const SOLC_VERSION = 'v0.4.8+commit.60cc1668'

function getContractContents(filepath) {
    let content = fs.readFileSync(filepath, 'utf8');
    return content;
}

function compileSource (input, callback) {
    return new Promise((resolve, reject) => {
        solc.loadRemoteVersion(SOLC_VERSION, function(e, correctSolc) {
            if (e) {
                throw new Error('Could not load correct solc version', e)
            }
            let output = correctSolc.compile({sources: input}, 1)
            resolve(output)
        })
    })
}

let main = {
    getContract: co.wrap(function*() {
        let compilerInput = {
            'Trustcoin.sol': getContractContents(trustcoinSourcePath),
            'deps/ERC20TokenInterface.sol': getContractContents(trustcoinDepPath)
        }
        let compiledOutput = yield compileSource(compilerInput)
        let contractOutput = compiledOutput.contracts.Trustcoin
        let trustcoinContractAbi = JSON.parse(contractOutput.interface);
        return {abi: trustcoinContractAbi, bytecode: contractOutput.bytecode};
    })
}

module.exports = main