HMAC SHA256

hmac_sha256.js

import crypto from 'crypto'

// inputs
const key = 'notsosecret'
const method = 'POST'
const url = 'https://example.com'
const timestamp = '2022-11-03T01:08:19.138Z'
const data = '{"data":{"partnerId":"1","tokenId":47210468}}'

// generate signature
const hmac = crypto.createHmac('SHA256', key)
hmac.update(`${method}${url}${timestamp}${data}`)

const hex = hmac.digest('hex') // signature header of webhook

console.log('hex:', hex)
// hex: 7226d389df2eff12b774ec57c51bf4d0bd78d5dfe8ab7addaf90f1f13910a3aa

hmac_sha256.rb

require 'openssl'

# inputs
key = 'notsosecret'
data =  '{"data":{"partnerId":"1","tokenId":47210468}}'
method = 'POST'
url = 'https://example.com'
timestamp = '2022-11-03T01:08:19.138Z'

# generate signature
digest = OpenSSL::Digest.new('sha256')
hex = OpenSSL::HMAC.hexdigest(digest, key, [method, url, timestamp, data].join)

puts "hex: #{hex}"
# hex: 7226d389df2eff12b774ec57c51bf4d0bd78d5dfe8ab7addaf90f1f13910a3aa