This directory contains an example on how to run transactions

The example does these things:

1. Sends a transaction that deploys a contract

1. Sends a transaction that calls the deployed contract

1. Prints the results

1. Run `npm install` in the root of this project

1. Run `npm run build:dist` in the root of this project

1. Run `npm run example` in this directory

import VM from '../..'

import Account from 'ethereumjs-account'

import * as utils from 'ethereumjs-util'

import { promisify } from 'util'

import stateManager from '../../lib/state/stateManager'

const Transaction = require('ethereumjs-tx') // Change when https://github.com/ethereumjs/ethereumjs-vm/pull/541 gets merged

async function main() {

const vm = new VM()

// import the key pair

// pre-generated (saves time)

// used to sign transactions and generate addresses

const keyPair = require('./key-pair')

// Transaction to initalize the name register, in this case

// it will register the sending address as 'null_radix'

// Notes:

// - A transaction has the fiels:

// - nonce

// - gasPrice

// - gasLimit

// - data

const rawTx1 = require('./raw-tx1')

// 2nd Transaction

const rawTx2 = require('./raw-tx2')

// the address we are sending from

const publicKeyBuf = utils.toBuffer(keyPair.publicKey)

const address = utils.pubToAddress(publicKeyBuf, true)

console.log('---------------------')

console.log('Sender address: ', utils.bufferToHex(address))

// create a new account

const account = new Account()

// give the account some wei.

account.balance = utils.toBuffer('0xf00000000000000001')

// Save the account

await promisify(vm.stateManager.putAccount.bind(vm.stateManager))(address, account)

// The first transaction deploys a contract

const createdAddress = (await runTx(vm, rawTx1, keyPair))!

// The second transaction calls that contract

await runTx(vm, rawTx2, keyPair)

// Now lets look at what we created. The transaction

// should have created a new account for the contract

// in the state. Lets test to see if it did.

const createdAccount = (await promisify(vm.stateManager.getAccount.bind(vm.stateManager))(

createdAddress,

)) as Account

console.log('-------results-------')

console.log('nonce: ' + createdAccount.nonce.toString('hex'))

console.log('balance in wei: ' + createdAccount.balance.toString('hex'))

console.log('stateRoot: ' + createdAccount.stateRoot.toString('hex'))

console.log('codeHash: ' + createdAccount.codeHash.toString('hex'))

console.log('---------------------')

async function runTx(vm: VM, rawTx: any, keyPair: { secretKey: string }) {

// create a new transaction out of the json

const tx = new Transaction(rawTx)

tx.sign(utils.toBuffer(keyPair.secretKey))

console.log('----running tx-------')

const results = await vm.runTx({

tx: tx,

})

const createdAddress = results.createdAddress

// log some results

console.log('gas used: ' + results.gasUsed.toString())

console.log('returned: ' + results.vm.return.toString('hex'))

if (createdAddress) {

console.log('address created: ' + createdAddress.toString('hex'))

}

return createdAddress

.then(() => process.exit(0))

.catch(error => {

console.error(error)

process.exit(1)

})

"secretKey": "0x3cd7232cd6f3fc66a57a6bedc1a8ed6c228fff0a327e169c2bcc5e869ed49511",

"publicKey": "0x0406cc661590d48ee972944b35ad13ff03c7876eae3fd191e8a2f77311b0a3c6613407b5005e63d7d8d76b89d5f900cde691497688bb281e07a5052ff61edebdc0"

{

"name": "run-transactions-complete",

"private": true,

"scripts": {

"example": "ts-node index.ts"

}

}

data: bidSig + time,