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{
  "id": "evt_2b9c…",                       // unique event id — dedupe on this
  "type": "job_request.completed",
  "created_at": "2026-06-30T10:00:00Z",
  "business_id": "b1f0…",
  "environment": "live",                    // or "sandbox"
  "data": { "object": { "id": "job_…", "short_code": "REQ-…", "status": "completed" } },
  "previous_status": "arrived"              // only on job_request.status_changed
}

Crisphive-Signature: t=1753857711,v1=<signature-new>,v1=<signature-old>

const crypto = require('crypto');
function verify(rawBody, header, secret) {
  const parts = header.split(',').map(kv => kv.split('='));
  const t = parts.find(([k]) => k === 't')[1];
  // two v1 entries during the 24h rotation window — accept any match
  const sigs = parts.filter(([k]) => k === 'v1').map(([, v]) => v);
  const expected = crypto.createHmac('sha256', secret)
    .update(t + '.' + rawBody).digest('hex');
  return sigs.some(v1 => v1.length === expected.length &&
    crypto.timingSafeEqual(Buffer.from(expected), Buffer.from(v1)));
}

import hmac, hashlib
def verify(raw_body: bytes, header: str, secret: str) -> bool:
    pairs = [kv.split('=', 1) for kv in header.split(',')]
    t = next(v for k, v in pairs if k == 't')
    # two v1 entries during the 24h rotation window — accept any match
    sigs = [v for k, v in pairs if k == 'v1']
    expected = hmac.new(secret.encode(), t.encode() + b'.' + raw_body,
                        hashlib.sha256).hexdigest()
    return any(hmac.compare_digest(expected, v1) for v1 in sigs)

func Verify(rawBody []byte, header, secret string) bool {
    var t string
    var sigs []string // two v1 entries during the 24h rotation window
    for _, kv := range strings.Split(header, ",") {
        kvp := strings.SplitN(kv, "=", 2)
        switch kvp[0] {
        case "t": t = kvp[1]
        case "v1": sigs = append(sigs, kvp[1])
        }
    }
    mac := hmac.New(sha256.New, []byte(secret))
    mac.Write([]byte(t + "."))
    mac.Write(rawBody)
    expected := hex.EncodeToString(mac.Sum(nil))
    for _, v1 := range sigs {
        if hmac.Equal([]byte(expected), []byte(v1)) {
            return true
        }
    }
    return false
}

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.security.MessageDigest;
import java.util.*;

public static boolean verify(byte[] rawBody, String header, String secret) throws Exception {
    String t = null;
    List<String> sigs = new ArrayList<>(); // two v1 entries during the 24h rotation window
    for (String kv : header.split(",")) {
        String[] x = kv.split("=", 2);
        if (x[0].equals("t")) t = x[1];
        if (x[0].equals("v1")) sigs.add(x[1]);
    }
    Mac mac = Mac.getInstance("HmacSHA256");
    mac.init(new SecretKeySpec(secret.getBytes(), "HmacSHA256"));
    mac.update((t + ".").getBytes());
    byte[] sig = mac.doFinal(rawBody);
    StringBuilder hex = new StringBuilder();
    for (byte b : sig) hex.append(String.format("%02x", b));
    byte[] expected = hex.toString().getBytes();
    for (String v1 : sigs) {
        if (MessageDigest.isEqual(expected, v1.getBytes())) return true;
    }
    return false;
}

using System;
using System.Security.Cryptography;
using System.Collections.Generic;
using System.Text;

public static bool Verify(byte[] rawBody, string header, string secret) {
    string t = null;
    var sigs = new List<string>(); // two v1 entries during the 24h rotation window
    foreach (var kv in header.Split(',')) {
        var x = kv.Split('=', 2);
        if (x[0] == "t") t = x[1];
        if (x[0] == "v1") sigs.Add(x[1]);
    }
    var prefix = Encoding.UTF8.GetBytes(t + ".");
    var input = new byte[prefix.Length + rawBody.Length];
    Buffer.BlockCopy(prefix, 0, input, 0, prefix.Length);
    Buffer.BlockCopy(rawBody, 0, input, prefix.Length, rawBody.Length);
    using var mac = new HMACSHA256(Encoding.UTF8.GetBytes(secret));
    var expected = Encoding.UTF8.GetBytes(
        Convert.ToHexString(mac.ComputeHash(input)).ToLowerInvariant());
    foreach (var v1 in sigs) {
        if (CryptographicOperations.FixedTimeEquals(
                expected, Encoding.UTF8.GetBytes(v1))) return true;
    }
    return false;
}

<?php
function verify(string $rawBody, string $header, string $secret): bool {
    $t = null;
    $sigs = []; // two v1 entries during the 24h rotation window
    foreach (explode(',', $header) as $kv) {
        [$k, $v] = explode('=', $kv, 2);
        if ($k === 't') { $t = $v; }
        if ($k === 'v1') { $sigs[] = $v; }
    }
    $expected = hash_hmac('sha256', $t . '.' . $rawBody, $secret);
    foreach ($sigs as $v1) {
        if (hash_equals($expected, $v1)) { return true; }
    }
    return false;
}

require 'openssl'
def verify(raw_body, header, secret)
  pairs = header.split(',').map { |kv| kv.split('=', 2) }
  t = pairs.find { |k, _| k == 't' }[1]
  # two v1 entries during the 24h rotation window — accept any match
  sigs = pairs.select { |k, _| k == 'v1' }.map { |_, v| v }
  expected = OpenSSL::HMAC.hexdigest('SHA256', secret, t + '.' + raw_body)
  # constant-time compare (Rack::Utils.secure_compare / ActiveSupport::SecurityUtils.secure_compare)
  sigs.any? { |v1| Rack::Utils.secure_compare(expected, v1) }
end