@truestamp/client/examples/nodejs/index.cjs

## Description

// Copyright © 2020-2023 Truestamp Inc. All rights reserved.

const crypto = require('crypto')

const { dotenvLoad } = require('dotenv-mono')
const d = dotenvLoad({ depth: 5, debug: true })
// console.log(d)

// Remote lib via npm
// const Truestamp = require('@truestamp/client')

// Local lib (must run 'pnpm run build' on each change)
const { TruestampClient } = require('../../dist/index.js')

// NodeJS SHA-256 Hash Function that returns a hex string
async function sha256(data) {
  const hash = crypto.createHash('sha256')
  const encoder = new TextEncoder()
  const dataBuffer = encoder.encode(data)
  hash.update(dataBuffer)
  return hash.digest('hex')
}

async function asyncCall() {
  const now = new Date()
  const nowHashHex = await sha256(now.toISOString())

  console.log(process.env.TRUESTAMP_API_KEY)
  console.log(process.env.TRUESTAMP_API_BASE_URL)
  console.log(process.env.TEST_ITEM_ID)

  // Instantiate and configure a shared client instance
  const truestamp = new TruestampClient({
    apiKey: process.env.TRUESTAMP_API_KEY,
    apiBaseUrl: process.env.TRUESTAMP_API_BASE_URL,
  })

  // create new item
  const createItemResp = await truestamp.createItem(
    {
      itemData: [
        {
          hash: nowHashHex,
          hashType: 'sha-256',
        },
      ],
    },
    { skipCF: false, skipOE: false },
  )

  console.log('createItemResp', JSON.stringify(createItemResp, null, 2))

  // update item by Item ID
  const later = new Date()
  const laterHashHex = await sha256(later.toISOString())

  const updateItemResp = await truestamp.updateItem(createItemResp.id, {
    itemData: [
      {
        hash: laterHashHex,
        hashType: 'sha-256',
      },
    ],
  })

  console.log('updateItemResp', JSON.stringify(updateItemResp, null, 2))

  // IMPORTANT:
  // The following calls would normally fail if run immediately after the last call
  // to 'createItem' above. This is because the Truestamp API will
  // require a few minutes for the first on-chain transaction
  // to settle. Until that happens, the commitment would be invalid so its
  // not returned. To work around this for this test a known good Item ID
  // is configured.

  // get commitment by Item ID
  const getCommitmentResp = await truestamp.getCommitment(
    process.env.TEST_ITEM_ID,
  )

  console.log('getCommitmentResp', JSON.stringify(getCommitmentResp, null, 2))

  // get commitment verification by Item ID
  const getCommitmentVerificationResp =
    await truestamp.getCommitmentVerification(process.env.TEST_ITEM_ID)

  console.log(
    'getCommitmentVerificationResp',
    JSON.stringify(getCommitmentVerificationResp, null, 2),
  )
}

asyncCall()