Ethereum Contract Deployer

Deploy contracts and execute transactions on Ethereum with ease

A simple package for deploying contracts and executing transactions to any ethereum chain you want with just a few simple lines of code.

Installation

OS X & Linux:

npm install eth-contract-deployer --save

Windows:

npm install eth-contract-deployer --save

Usage example

Usage

require eth-contract-deployer in your script

const ethDeployer = require("eth-contract-deployer")

configure eth-contract-deployer

const config = {
  nodeAddress: 'http://127.0.0.1:8545', // node address
  artifactsDir: '/path/to/artifacts/dir', // path to contracts artifacts (abi/bin files)
  privateKey: '0x000...', // private key
}

ethDeployer.config(config)

Deploy a contract

deploy() needs 2 arguments,

• contract name - the contract abi filename as it is on the artifacts dir provided
• constructor arguments - an array containing the values needed for the contract constructor

const token = await ethDeployer.deploy("ContractName", ["value1", "value2", 'value3'])

Get contract instance

getInstance() needs 2 arguments

• contract name - the contract abi filename as it is on the artifacts dir provided
• contract address - the contract address

const contractInstance = ethDeployer.getInstance("ContractName", "0x000...")

Execute a transaction

execute() needs just one argument, a transaction object

const tx = token.methods.transfer("0x000...", "10000000000000000000000")
await ethDeployer.execute(tx)

Get account

get account object

const account = ethDeployer.getAccount()
console.log(account.address) // public address

Get web3 instance

get the web3 instance

const web3 = ethDeployer.getWeb3Instance()

example of using the module to prepare a deploy script for a bancor smart token:

• deploys the bancor smart token
• deploys a converter contract for the smart token
• deploys a new ERC20 token
• issue smart tokens
• transfer the new ERC20 token to the converter
• transfer smart token owner ship to the converter
• accept smart token ownership by the converter
• run a conversion between both tokens to test if the whole thing worked

const ethDeployer = require("eth-contract-deployer")

const PRIVATE_KEY = ""
const ARTIFACTS_DIR = ""
const NODE_ADDRESS = ""

async function run() {
  // config object for eth deployer
  const config = {
    nodeAddress: NODE_ADDRESS, // node address
    artifactsDir: ARTIFACTS_DIR, // path to contracts artifacts
    privateKey: PRIVATE_KEY, // private key
  }

  // configure eth deployer
  ethDeployer.config(config)

  // get self address
  const account = ethDeployer.getAccount()

  // get web3 instance
  const web3 = ethDeployer.getWeb3()

  // deploy bancor smart token
  const smartToken = await ethDeployer.deploy("SmartToken", ["test token", "TST", 18])

  // deploy ERC20 token
  const reserveToken = await ethDeployer.deploy("ERC20Token", ["reserve token", "RSV", 18, "10000000000000000000000"])

  // deploy bancor converter
  const contractRegistryAddress = "0x000..." // Bancor registry contract address goes here
  const fee = 3000
  const ratio = 100000
  const converterParams = [smartToken._address, contractRegistryAddress, fee, reserveToken._address, ratio]
  const converter = await ethDeployer.deploy("BancorConverter", converterParams)

  // issue new smartToken tokens
  const tx = smartToken.methods.issue(account.address, "10000000000000000000000")
  await ethDeployer.execute(tx)

  // transfer reserve tokens to converter
  await ethDeployer.execute(reserveToken.methods.transfer(converter._address, "1000000000000000000000"))

  // transfer smartToken ownership to converter
  await ethDeployer.execute(smartToken.methods.transferOwnership(converter._address))

  // accept smartToken ownership by converter
  await ethDeployer.execute(converter.methods.acceptTokenOwnership())

  // check tokens balance before conversion
  console.log("smartToken balance", web3.utils.fromWei(await smartToken.methods.balanceOf(account.address).call()))
  console.log("reserve balance", web3.utils.fromWei(await reserveToken.methods.balanceOf(account.address).call()))

  // perform conversion smartToken -> reserve token
  const conversionPath = [smartToken._address, smartToken._address, reserveToken._address]
  await ethDeployer.execute(await converter.methods.quickConvert(conversionPath, "1000000000000000000", "1"))

  // check tokens balance after conversion
  console.log("smartToken balance", web3.utils.fromWei(await smartToken.methods.balanceOf(account.address).call()))
  console.log("reserve balance", web3.utils.fromWei(await reserveToken.methods.balanceOf(account.address).call()))
}

run()
  .then((t) => {
    process.exit(0)
  })
  .catch((error) => {
    console.log(error)
    process.exit(1)
  })

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