Ethereum smart contract deployment

deploy.js

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

// Connect to instance using the RPC endpoint
const rpc = 'paste url here'
const web3 = new Web3(new Web3.providers.HttpProvider(rpc))

// Compile smart contract using the solc compiler
const sourceCode = `
pragma solidity ^0.5.0;
contract SimpleStorage {
    uint public storedData;
    
    constructor (uint initVal) public {
        storedData = initVal;
    }
    
    function set(uint x) public {
        storedData = x;
    }
    
    function get() public view returns (uint retVal) {
        return storedData;
    }
}
`
const input = {
	language: 'Solidity', 
	sources: { 'simplestorage.sol': { content: sourceCode } },
	settings: { outputSelection: { '*': { '*': [ '*' ] } } }
}
const compiled = JSON.parse(solc.compile(JSON.stringify(input)))
if (compiled.errors > 0) {
  console.error(compiled.errors)
  process.exit(1)
}
const compiledContracts = compiled.contracts['simplestorage.sol']
console.log('successfully compiled contract(s)')


;(async () => {
  try {
    // Select account and unlock the account with your password
    const accountAddress = 'paste account address create from service key'
    const accountPassword = 'use your password to unlock account'
    await web3.eth.personal.unlockAccount(accountAddress, accountPassword, 10)
    console.log('account unlocked')

    // Deploy contract, initialize with value 1
    const contract = await new web3.eth.Contract(compiledContracts.SimpleStorage.abi).deploy({
      data: '0x' + compiledContracts.SimpleStorage.evm.bytecode.object,
      arguments: [1]
    }).send({
      from: accountAddress,
      gas: 300000
    })
    const contractAddress = contract.options.address
    console.log('contract successfully deployed')

    // Retrieve contract using ABI and addres and read from it
    const newContract = new web3.eth.Contract(compiledContracts.SimpleStorage.abi, contractAddress)
    let result = await newContract.methods.get().call()
    console.log('successfully read from contract:', result)

    // Change value from 1 to 42
    await newContract.methods.set(42).send({ from: accountAddress })
    result = await newContract.methods.get().call()
    console.log('successfully wrote and read new value to contract:', result)

    // Change value 
  } catch (err) {
    console.error(err)
  }
})()