Miguel Mota miguelmota

## ethers_contract_instance.js
const contract = new ethers.Contract(address, abi, provider)
const result = await contract.myMethod(data)

// equivalent of
//const contract = await new web3.eth.Contract(abi, address)
//const result = await contract.methods.myMethod(data).call()

## ethers_ecrecover.js
const msgBytes = ethers.utils.arrayify(msgHex)
const sigBytes = ethers.utils.arrayify(sigHex)
const msgSigner = utils.verifyMessage(msgBytes, sigBytes)

// equivalent of:
// const msgSigner = await web3.eth.accounts.recover(msgHex, sigHex)

## pino_trace_caller.js
import path from 'path'
import pino from 'pino'

const STACKTRACE_OFFSET = 2
const LINE_OFFSET = 7
const { symbols : { asJsonSym} } = pino

function traceCaller (pinoInstance) {
  const get = (target, name) => name === asJsonSym ? asJson : target[name]

## eip1271.js
const Web3 = require('web3')

const provider = new Web3.providers.HttpProvider('https://kovan.infura.io')
const web3 = new Web3(provider)

const eip1271Abi = [
  {
    "constant": true,
    "inputs": [
      {

## storageAvailable.js
export const localStorageAvailable = () => {
  return storageAvailable('localStorage')
}

const storageAvailable = (kind = 'localStorage') => {
  let storage
  try {
    storage = window[kind]
    let x = '__storage_test__'
    storage.setItem(x, x)

## validate_ethereum_address.js
const validAddress = (address) => {
  return /^(0x)[0-9a-f]{40}$/i.test(address)
}

## arraybuffer_to_base64.js
const arrayBufferToBase64 = (arrayBuffer) => {
  return window.btoa(String.fromCharCode(...new Uint8Array(arrayBuffer)))
}

## hdwallet.js
const bip39 = require('bip39')
const hdkey = require('ethereumjs-wallet/hdkey')

const entropy = '30d1bd7478be8ec6cc094012bd0b669668ff2d8127e33e279fc8917d1d425ab5'
const seed = await bip39.mnemonicToSeed(bip39.entropyToMnemonic(entropy))
const mnemonic = await bip39.entropyToMnemonic(entropy)
const path = `m/44'/60'/0'/0/0`
const hdwallet = hdkey.fromMasterSeed(seed)
const wallet = hdwallet.derivePath(path).getWallet()
const address = `0x${wallet.getAddress().toString('hex')}`

## entropy_to_mnemonic.js
const bip39 = require('bip39')

const entropy = '30d1bd7478be8ec6cc094012bd0b669668ff2d8127e33e279fc8917d1d425ab5'
const mnemonic = bip39.entropyToMnemonic(entropy)
console.log(mnemonic) // cotton mistake fringe vapor trophy gloom coral chimney bargain tribe super coast morning nothing afraid wise dilemma diagram vendor carry spike patrol hello physical

## receiver.sh
nc -l -s 0.0.0.0 -p 1337 | tar xf -