From bc768879848598b0bc4de74add7b72961177e1aa Mon Sep 17 00:00:00 2001 From: Greg Soucy Date: Thu, 21 May 2026 16:36:40 -0400 Subject: [PATCH] Add webhook auto-verify example with runtime verification flow --- examples/webhook-auto-verify/.gitignore | 3 + examples/webhook-auto-verify/README.md | 59 ++ .../webhook-auto-verify/package-lock.json | 827 ++++++++++++++++++ examples/webhook-auto-verify/package.json | 15 + ...mple-canonical-shape-tampered-webhook.json | 27 + .../sample-canonical-shape-webhook.json | 27 + .../scripts/generate-samples.mjs | 50 ++ examples/webhook-auto-verify/server.js | 75 ++ 8 files changed, 1083 insertions(+) create mode 100644 examples/webhook-auto-verify/.gitignore create mode 100644 examples/webhook-auto-verify/README.md create mode 100644 examples/webhook-auto-verify/package-lock.json create mode 100644 examples/webhook-auto-verify/package.json create mode 100644 examples/webhook-auto-verify/sample-canonical-shape-tampered-webhook.json create mode 100644 examples/webhook-auto-verify/sample-canonical-shape-webhook.json create mode 100644 examples/webhook-auto-verify/scripts/generate-samples.mjs create mode 100644 examples/webhook-auto-verify/server.js diff --git a/examples/webhook-auto-verify/.gitignore b/examples/webhook-auto-verify/.gitignore new file mode 100644 index 0000000..837f7f8 --- /dev/null +++ b/examples/webhook-auto-verify/.gitignore @@ -0,0 +1,3 @@ +node_modules +.env +.DS_Store diff --git a/examples/webhook-auto-verify/README.md b/examples/webhook-auto-verify/README.md new file mode 100644 index 0000000..2357f49 --- /dev/null +++ b/examples/webhook-auto-verify/README.md @@ -0,0 +1,59 @@ +# Webhook Auto-Verification Example + +This example shows automatic verification. No manual paste is required. + +## Flow + +1. Runtime signs receipt. +2. Webhook receives receipt. +3. Server posts receipt to verifier. +4. Valid receipt returns accepted. +5. Tampered receipt returns rejected. + +## Commands + +```bash +cd examples/webhook-auto-verify +npm install +npm run check +npm run generate:samples +npm start +``` + +In another terminal: + +```bash +curl -X POST http://localhost:3000/webhook \ + -H "Content-Type: application/json" \ + --data @sample-canonical-shape-webhook.json + +curl -X POST http://localhost:3000/webhook \ + -H "Content-Type: application/json" \ + --data @sample-canonical-shape-tampered-webhook.json +``` + +Expected: +- valid -> 200 accepted +- tampered -> 400 rejected + +## Environment variables + +- `COMMANDLAYER_VERIFY_URL` +- `COMMANDLAYER_SIGN_URL` +- `PORT` + +## Trust boundaries + +- Runtime signs. +- Verifier validates. +- MCP bridges. +- SDK wraps. +- Schema-valid alone is not verified. +- Verification requires hash and signature checks. +- Webhook sender authentication is separate from receipt verification. + + +## Note on sample files + +If your environment can reach `https://runtime.commandlayer.org`, run `npm run generate:samples` to create real live samples (`sample-valid-webhook.json` and `sample-tampered-webhook.json`). +In offline or restricted environments, the committed `sample-canonical-shape-*.json` files are structure-only placeholders and are not verifiable runtime receipts. diff --git a/examples/webhook-auto-verify/package-lock.json b/examples/webhook-auto-verify/package-lock.json new file mode 100644 index 0000000..0778c12 --- /dev/null +++ b/examples/webhook-auto-verify/package-lock.json @@ -0,0 +1,827 @@ +{ + "name": "commandlayer-webhook-auto-verify-example", + "version": "1.0.0", + "lockfileVersion": 3, + "requires": true, + "packages": { + "": { + "name": "commandlayer-webhook-auto-verify-example", + "version": "1.0.0", + "dependencies": { + "express": "^4.19.2" + } + }, + "node_modules/accepts": { + "version": "1.3.8", + "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.8.tgz", + "integrity": 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+} diff --git a/examples/webhook-auto-verify/package.json b/examples/webhook-auto-verify/package.json new file mode 100644 index 0000000..a59a3af --- /dev/null +++ b/examples/webhook-auto-verify/package.json @@ -0,0 +1,15 @@ +{ + "name": "commandlayer-webhook-auto-verify-example", + "version": "1.0.0", + "private": true, + "type": "module", + "description": "Automatic webhook receipt verification example for CommandLayer canonical receipts.", + "scripts": { + "start": "node server.js", + "check": "node --check server.js && node --check scripts/generate-samples.mjs", + "generate:samples": "node scripts/generate-samples.mjs" + }, + "dependencies": { + "express": "^4.19.2" + } +} diff --git a/examples/webhook-auto-verify/sample-canonical-shape-tampered-webhook.json b/examples/webhook-auto-verify/sample-canonical-shape-tampered-webhook.json new file mode 100644 index 0000000..eb7b63d --- /dev/null +++ b/examples/webhook-auto-verify/sample-canonical-shape-tampered-webhook.json @@ -0,0 +1,27 @@ +{ + "event": "commandlayer.receipt.created", + "receipt": { + "metadata": { + "proof": { + "canonicalization": "json.sorted_keys.v1", + "hash": { + "alg": "SHA-256", + "value": "" + }, + "signature": { + "alg": "Ed25519", + "kid": "vC4WbcNoq2znSCiQ", + "value": "" + }, + "signer_id": "runtime.commandlayer.eth" + } + }, + "result": { + "payload": { + "message": "tampered webhook payload", + "source": "examples/webhook-auto-verify", + "ts": "" + } + } + } +} diff --git a/examples/webhook-auto-verify/sample-canonical-shape-webhook.json b/examples/webhook-auto-verify/sample-canonical-shape-webhook.json new file mode 100644 index 0000000..907fa8b --- /dev/null +++ b/examples/webhook-auto-verify/sample-canonical-shape-webhook.json @@ -0,0 +1,27 @@ +{ + "event": "commandlayer.receipt.created", + "receipt": { + "metadata": { + "proof": { + "canonicalization": "json.sorted_keys.v1", + "hash": { + "alg": "SHA-256", + "value": "" + }, + "signature": { + "alg": "Ed25519", + "kid": "vC4WbcNoq2znSCiQ", + "value": "" + }, + "signer_id": "runtime.commandlayer.eth" + } + }, + "result": { + "payload": { + "message": "hello from webhook auto verify", + "source": "examples/webhook-auto-verify", + "ts": "" + } + } + } +} diff --git a/examples/webhook-auto-verify/scripts/generate-samples.mjs b/examples/webhook-auto-verify/scripts/generate-samples.mjs new file mode 100644 index 0000000..1b847f2 --- /dev/null +++ b/examples/webhook-auto-verify/scripts/generate-samples.mjs @@ -0,0 +1,50 @@ +import { writeFile } from 'node:fs/promises'; +import { resolve } from 'node:path'; + +const SIGN_ENDPOINT = process.env.COMMANDLAYER_SIGN_URL || 'https://runtime.commandlayer.org/trust-verification/sign/v1.0.0'; + +const body = { + payload: { + message: 'hello from webhook auto verify', + source: 'examples/webhook-auto-verify', + ts: new Date().toISOString() + } +}; + +const response = await fetch(SIGN_ENDPOINT, { + method: 'POST', + headers: { 'content-type': 'application/json' }, + body: JSON.stringify(body) +}); + +if (!response.ok) { + throw new Error(`Sign request failed: ${response.status} ${response.statusText}`); +} + +const json = await response.json(); +const receipt = json?.receipt ?? json?.final_receipt; + +if (!receipt || typeof receipt !== 'object') { + throw new Error('No receipt found in sign response (expected response.receipt or response.final_receipt)'); +} + +if (!receipt?.metadata?.proof) { + throw new Error('Receipt missing canonical metadata.proof'); +} + +const validWebhook = { + event: 'commandlayer.receipt.created', + receipt +}; + +const tamperedWebhook = JSON.parse(JSON.stringify(validWebhook)); +if (!tamperedWebhook?.receipt?.result?.payload || typeof tamperedWebhook.receipt.result.payload !== 'object') { + throw new Error('Receipt shape missing receipt.result.payload; cannot produce tampered sample safely'); +} +tamperedWebhook.receipt.result.payload.message = 'tampered webhook payload'; + +await writeFile(resolve('sample-valid-webhook.json'), `${JSON.stringify(validWebhook, null, 2)}\n`, 'utf8'); +console.log('SAMPLE 1 VALID WRITTEN'); + +await writeFile(resolve('sample-tampered-webhook.json'), `${JSON.stringify(tamperedWebhook, null, 2)}\n`, 'utf8'); +console.log('SAMPLE 2 TAMPERED WRITTEN'); diff --git a/examples/webhook-auto-verify/server.js b/examples/webhook-auto-verify/server.js new file mode 100644 index 0000000..4db1e5f --- /dev/null +++ b/examples/webhook-auto-verify/server.js @@ -0,0 +1,75 @@ +import express from 'express'; + +const app = express(); +app.use(express.json()); + +const PORT = Number(process.env.PORT || 3000); +const VERIFY_ENDPOINT = process.env.COMMANDLAYER_VERIFY_URL || 'https://runtime.commandlayer.org/verify'; + +app.post('/webhook', async (req, res) => { + const { event, receipt } = req.body || {}; + + if (!event || !receipt || typeof receipt !== 'object') { + return res.status(400).json({ + status: 'rejected', + reason: 'Missing required event or receipt' + }); + } + + try { + const verifyResponse = await fetch(VERIFY_ENDPOINT, { + method: 'POST', + headers: { 'content-type': 'application/json' }, + body: JSON.stringify({ receipt }) + }); + + const verifyJson = await verifyResponse.json(); + const verifierStatus = verifyJson?.status ?? 'UNKNOWN'; + const checks = verifyJson?.checks ?? {}; + const errors = Array.isArray(verifyJson?.errors) ? verifyJson.errors : []; + + console.log('webhook verify result', { + event, + verifier_endpoint: VERIFY_ENDPOINT, + verifier_status: verifierStatus, + hash_matches: checks?.hash_matches, + signature_valid: checks?.signature_valid, + signer_id: checks?.signer_id, + kid: checks?.kid + }); + + const accepted = verifyJson?.ok === true || verifierStatus === 'VALID' || verifierStatus === 'VERIFIED'; + + if (accepted) { + return res.status(200).json({ + status: 'accepted', + event, + verifier_status: verifierStatus, + checks + }); + } + + return res.status(400).json({ + status: 'rejected', + event, + reason: 'Receipt verification failed', + verifier_status: verifierStatus, + checks, + errors + }); + } catch (error) { + return res.status(502).json({ + status: 'rejected', + event, + reason: 'Verifier request failed', + details: error instanceof Error ? error.message : String(error) + }); + } +}); + +app.listen(PORT, () => { + console.log(`Webhook auto-verify demo listening on http://localhost:${PORT}`); + console.log(`Using verifier endpoint: ${VERIFY_ENDPOINT}`); + console.log('Security note: this is a demo. Production webhooks require sender authentication, replay protection, timestamp checks, rate limiting, and event idempotency.'); + console.log('Receipt verification proves receipt integrity; it does not replace webhook sender authentication.'); +});