Add canonical standardwebhooks platform and remove twilio/pagerduty (#54)

Author: Prateek32177

README.md

@@ -7,7 +7,7 @@
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](LICENSE)
 [![Zero Dependencies](https://img.shields.io/badge/dependencies-0-brightgreen)](package.json)
 
-Stop writing webhook verification from scratch. **Tern** handles signature verification for Stripe, GitHub, Clerk, Shopify, and 15+ more platforms — with one consistent API.
+Stop writing webhook verification from scratch. **Tern** handles signature verification for Stripe, GitHub, Clerk, Shopify, and 15+ more platforms — with one consistent API. It also verifies **Standard Webhooks** (including Svix-style `svix-*` and canonical `webhook-*` headers) through a single `standardwebhooks` platform config.
 
 > Need reliable delivery too? Tern supports inbound webhook delivery via Upstash QStash — automatic retries, DLQ management, replay controls, and Slack/Discord alerting. Bring your own Upstash account (BYOK).
 
@@ -79,27 +79,6 @@ const result = await WebhookVerificationService.verifyAny(request, {
 console.log(`Verified ${result.platform} webhook`);
 ```
 
-### Twilio example
-
-```typescript
-import { WebhookVerificationService } from '@hookflo/tern';
-
-export async function POST(request: Request) {
-  const result = await WebhookVerificationService.verify(request, {
-    platform: 'twilio',
-    secret: process.env.TWILIO_AUTH_TOKEN!,
-    // Optional when behind proxies/CDNs if request.url differs from the public Twilio URL:
-    twilioBaseUrl: 'https://yourdomain.com/api/webhooks/twilio',
-  });
-
-  if (!result.isValid) {
-    return Response.json({ error: result.error }, { status: 400 });
-  }
-
-  return Response.json({ ok: true });
-}
-```
-
 ### Core SDK (runtime-agnostic)
 
 Use Tern without framework adapters in any runtime that supports the Web `Request` API.
@@ -214,17 +193,16 @@ app.post('/webhooks/stripe', createWebhookHandler({
 | **Doppler** | HMAC-SHA256 | ✅ Tested |
 | **Sanity** | HMAC-SHA256 | ✅ Tested |
 | **Svix** | HMAC-SHA256 | ⚠️ Untested for now |
+| **Standard Webhooks** (`standardwebhooks`) | HMAC-SHA256 | ✅ Tested |
 | **Linear** | HMAC-SHA256 | ⚠️ Untested for now |
-| **PagerDuty** | HMAC-SHA256 | ⚠️ Untested for now |
-| **Twilio** | HMAC-SHA1 | ⚠️ Untested for now |
 | **Razorpay** | HMAC-SHA256 | 🔄 Pending |
 | **Vercel** | HMAC-SHA256 | 🔄 Pending |
 
 > Don't see your platform? [Use custom config](#custom-platform-configuration) or [open an issue](https://github.com/Hookflo/tern/issues).
 
 ### Platform signature notes
 
-- **Standard Webhooks style** platforms (Clerk, Dodo Payments, Polar, ReplicateAI) commonly use a secret that starts with `whsec_...`.
+- **Standard Webhooks style** providers are supported via the canonical `standardwebhooks` platform (with aliases for both `webhook-*` and `svix-*` headers). Clerk, Dodo Payments, Polar, and ReplicateAI all follow this pattern and commonly use a secret that starts with `whsec_...`.
 - **ReplicateAI**: copy the webhook signing secret from your Replicate webhook settings and pass it directly as `secret`.
 - **fal.ai**: supports JWKS key resolution out of the box — use `secret: ''` for auto key resolution, or pass a PEM public key explicitly.
 
@@ -365,25 +343,31 @@ const result = await WebhookVerificationService.verify(request, {
 });
 ```
 
-### Svix / Standard Webhooks format (Clerk, Dodo Payments, ReplicateAI, etc.)
+### Standard Webhooks config helpers (Svix-style and webhook-* headers)
 
 ```typescript
-const svixConfig = {
-  platform: 'my-svix-platform',
-  secret: 'whsec_abc123...',
+import {
+  createStandardWebhooksConfig,
+  STANDARD_WEBHOOKS_BASE,
+} from '@hookflo/tern';
+
+const signatureConfig = createStandardWebhooksConfig({
+  id: 'webhook-id',
+  timestamp: 'webhook-timestamp',
+  signature: 'webhook-signature',
+  idAliases: ['svix-id'],
+  timestampAliases: ['svix-timestamp'],
+  signatureAliases: ['svix-signature'],
+});
+
+const result = await WebhookVerificationService.verify(request, {
+  platform: 'standardwebhooks',
+  secret: process.env.STANDARD_WEBHOOKS_SECRET!,
   signatureConfig: {
-    algorithm: 'hmac-sha256',
-    headerName: 'webhook-signature',
-    headerFormat: 'raw',
-    timestampHeader: 'webhook-timestamp',
-    timestampFormat: 'unix',
-    payloadFormat: 'custom',
-    customConfig: {
-      payloadFormat: '{id}.{timestamp}.{body}',
-      idHeader: 'webhook-id',
-    },
+    ...STANDARD_WEBHOOKS_BASE,
+    ...signatureConfig,
   },
-};
+});
 ```
 
 See the [SignatureConfig type](https://tern.hookflo.com) for all options.
@@ -431,8 +415,6 @@ interface WebhookVerificationResult {
 
 ## Troubleshooting
 
-- **Twilio invalid signature behind proxies/CDNs**: if your runtime `request.url` differs from the public Twilio webhook URL, pass `twilioBaseUrl` in `WebhookVerificationService.verify(...)` for platform `twilio`.
-
 
 **`Module not found: Can't resolve "@hookflo/tern/nextjs"`**
 

src/adapters/cloudflare.ts

@@ -10,7 +10,6 @@ export interface CloudflareWebhookHandlerOptions<TEnv = Record<string, unknown>,
   secret?: string;
   secretEnv?: string;
   toleranceInSeconds?: number;
-  twilioBaseUrl?: string;
   queue?: QueueOption;
   alerts?: AlertConfig;
   alert?: Omit<SendAlertOptions, 'dlq' | 'dlqId' | 'source' | 'eventId'>;
@@ -66,7 +65,6 @@ export function createWebhookHandler<TEnv = Record<string, unknown>, TPayload =
           platform: options.platform,
           secret,
           toleranceInSeconds: options.toleranceInSeconds,
-          twilioBaseUrl: options.twilioBaseUrl,
         },
       );
 

src/adapters/express.ts

@@ -24,7 +24,6 @@ export interface ExpressWebhookMiddlewareOptions {
   platform: WebhookPlatform;
   secret: string;
   toleranceInSeconds?: number;
-  twilioBaseUrl?: string;
   queue?: QueueOption;
   alerts?: AlertConfig;
   alert?: Omit<SendAlertOptions, 'dlq' | 'dlqId' | 'source' | 'eventId'>;
@@ -93,7 +92,6 @@ export function createWebhookMiddleware(
           platform: options.platform,
           secret: options.secret,
           toleranceInSeconds: options.toleranceInSeconds,
-          twilioBaseUrl: options.twilioBaseUrl,
         },
       );
 

src/adapters/hono.ts

@@ -21,7 +21,6 @@ export interface HonoWebhookHandlerOptions<
   platform: WebhookPlatform;
   secret: string;
   toleranceInSeconds?: number;
-  twilioBaseUrl?: string;
   queue?: QueueOption;
   alerts?: AlertConfig;
   alert?: Omit<SendAlertOptions, 'dlq' | 'dlqId' | 'source' | 'eventId'>;
@@ -77,7 +76,6 @@ export function createWebhookHandler<
           platform: options.platform,
           secret: options.secret,
           toleranceInSeconds: options.toleranceInSeconds,
-          twilioBaseUrl: options.twilioBaseUrl,
         },
       );
 

src/adapters/nextjs.ts

@@ -9,7 +9,6 @@ export interface NextWebhookHandlerOptions<TPayload = any, TMetadata extends Rec
   platform: WebhookPlatform;
   secret: string;
   toleranceInSeconds?: number;
-  twilioBaseUrl?: string;
   queue?: QueueOption;
   alerts?: AlertConfig;
   alert?: Omit<SendAlertOptions, 'dlq' | 'dlqId' | 'source' | 'eventId'>;
@@ -58,7 +57,6 @@ export function createWebhookHandler<TPayload = any, TMetadata extends Record<st
           platform: options.platform,
           secret: options.secret,
           toleranceInSeconds: options.toleranceInSeconds,
-          twilioBaseUrl: options.twilioBaseUrl,
         },
       );
 

src/index.ts

@@ -62,9 +62,6 @@ export class WebhookVerificationService {
       ...signatureConfig,
       customConfig: {
         ...(signatureConfig.customConfig || {}),
-        ...(config.platform === 'twilio' && config.twilioBaseUrl
-          ? { twilioBaseUrl: config.twilioBaseUrl }
-          : {}),
       },
     };
 
@@ -247,9 +244,8 @@ export class WebhookVerificationService {
       case 'sentry':
       case 'vercel':
       case 'linear':
-      case 'pagerduty':
-      case 'twilio':
       case 'svix':
+      case 'standardwebhooks':
         return this.pickString(payload?.id) || null;
       case 'doppler':
         return this.pickString(payload?.event?.id, metadata?.id) || null;
@@ -293,8 +289,6 @@ export class WebhookVerificationService {
     if (headers.has('x-hub-signature-256')) return 'github';
     if (headers.has('svix-signature')) return headers.has('svix-id') ? 'svix' : 'clerk';
     if (headers.has('linear-signature')) return 'linear';
-    if (headers.has('x-pagerduty-signature')) return 'pagerduty';
-    if (headers.has('x-twilio-signature')) return 'twilio';
     if (headers.has('workos-signature')) return 'workos';
     if (headers.has('webhook-signature')) {
       const userAgent = headers.get('user-agent')?.toLowerCase() || '';
@@ -450,6 +444,8 @@ export {
   platformUsesAlgorithm,
   getPlatformsUsingAlgorithm,
   validateSignatureConfig,
+  STANDARD_WEBHOOKS_BASE,
+  createStandardWebhooksConfig,
 } from './platforms/algorithms';
 export { createAlgorithmVerifier } from './verifiers/algorithms';
 export { createCustomVerifier } from './verifiers/custom-algorithms';

src/platforms/algorithms.ts

@@ -4,6 +4,41 @@ import {
   SignatureConfig,
 } from "../types";
 
+export const STANDARD_WEBHOOKS_BASE = {
+  algorithm: "hmac-sha256" as const,
+  headerFormat: "raw" as const,
+  timestampFormat: "unix" as const,
+  payloadFormat: "custom" as const,
+  customConfig: {
+    signatureFormat: "v1={signature}",
+    payloadFormat: "{id}.{timestamp}.{body}",
+    encoding: "base64",
+    secretEncoding: "base64",
+  },
+};
+
+export function createStandardWebhooksConfig(headers: {
+  id: string;
+  timestamp: string;
+  signature: string;
+  idAliases?: string[];
+  timestampAliases?: string[];
+  signatureAliases?: string[];
+}): SignatureConfig {
+  return {
+    ...STANDARD_WEBHOOKS_BASE,
+    headerName: headers.signature,
+    timestampHeader: headers.timestamp,
+    customConfig: {
+      ...STANDARD_WEBHOOKS_BASE.customConfig,
+      idHeader: headers.id,
+      ...(headers.idAliases && { idHeaderAliases: headers.idAliases }),
+      ...(headers.timestampAliases && { timestampHeaderAliases: headers.timestampAliases }),
+      ...(headers.signatureAliases && { signatureHeaderAliases: headers.signatureAliases }),
+    },
+  };
+}
+
 export const platformAlgorithmConfigs: Record<
   WebhookPlatform,
   PlatformAlgorithmConfig
@@ -358,37 +393,19 @@ export const platformAlgorithmConfigs: Record<
     description: 'Linear webhooks use HMAC-SHA256 on the raw body with a 60s timestamp replay window',
   },
 
-  pagerduty: {
-    platform: 'pagerduty',
+  standardwebhooks: {
+    platform: 'standardwebhooks',
     signatureConfig: {
-      algorithm: 'hmac-sha256',
-      headerName: 'x-pagerduty-signature',
-      headerFormat: 'raw',
-      payloadFormat: 'raw',
-      prefix: 'v1=',
-      customConfig: {
-        signatureFormat: 'v1={signature}',
-        comparePrefixed: true,
-      },
-    },
-    description: 'PagerDuty webhooks use HMAC-SHA256 with v1=<hex> signatures',
-  },
-
-  twilio: {
-    platform: 'twilio',
-    signatureConfig: {
-      algorithm: 'hmac-sha1',
-      headerName: 'x-twilio-signature',
-      headerFormat: 'raw',
-      payloadFormat: 'custom',
-      customConfig: {
-        payloadFormat: '{url}',
-        encoding: 'base64',
-        secretEncoding: 'utf8',
-        validateBodySHA256: true,
-      },
+      ...createStandardWebhooksConfig({
+        id: 'webhook-id',
+        timestamp: 'webhook-timestamp',
+        signature: 'webhook-signature',
+        idAliases: ['svix-id'],
+        timestampAliases: ['svix-timestamp'],
+        signatureAliases: ['svix-signature'],
+      }),
     },
-    description: 'Twilio webhooks use HMAC-SHA1 with base64 signatures (URL canonicalization required)',
+    description: 'Canonical Standard Webhooks implementation. Works for any platform using v1= HMAC-SHA256 signing regardless of header names.',
   },
 
   custom: {