This workflow follows the Emailsend → HTTP Request recipe pattern — see all workflows that pair these two integrations.
The workflow JSON
Copy or download the full n8n JSON below. Paste it into a new n8n workflow, add your credentials, activate. Full import guide →
{
"name": "Payment Gateway - IPN Handler",
"nodes": [
{
"parameters": {
"httpMethod": "POST",
"path": "payment-ipn",
"options": {}
},
"name": "Webhook",
"type": "n8n-nodes-base.webhook",
"typeVersion": 1,
"position": [
0,
0
]
},
{
"parameters": {
"jsCode": "const headers = $json.headers || {}; const sig = headers['x-nowpayments-sig'] || headers['X-NOWPAYMENTS-SIG'] || ''; const body = $json.body || {}; function sortObject(obj){ return Object.keys(obj).sort().reduce((r,k)=>{ const v = obj[k]; r[k] = v && typeof v === 'object' && !Array.isArray(v) ? sortObject(v) : v; return r; },{}); } let valid = false; const secret = $env.NOWPAYMENTS_IPN_SECRET || ''; if (secret && sig) { const crypto = require('crypto'); const payload = JSON.stringify(sortObject(body)); const hmac = crypto.createHmac('sha512', secret); hmac.update(payload); const expected = hmac.digest('hex'); valid = expected === sig; } return { json: { ...$json, ipnValid: valid } };"
},
"name": "Validate IPN Signature",
"type": "n8n-nodes-base.code",
"typeVersion": 1,
"position": [
120,
0
]
},
{
"parameters": {
"conditions": {
"boolean": [
{
"value1": "={{$json.ipnValid}}",
"operation": "isTrue"
}
]
}
},
"name": "Is Signature Valid",
"type": "n8n-nodes-base.if",
"typeVersion": 1,
"position": [
200,
0
]
},
{
"parameters": {
"conditions": {
"string": [
{
"value1": "={{$json.body.payment_status}}",
"operation": "equal",
"value2": "finished"
},
{
"value1": "={{$json.body.payment_status}}",
"operation": "equal",
"value2": "confirmed"
}
]
},
"combineOperation": "any"
},
"name": "Check Status",
"type": "n8n-nodes-base.if",
"typeVersion": 1,
"position": [
380,
0
]
},
{
"parameters": {
"url": "={{($env.API_URL || 'https://academicchain-ledger.onrender.com')}}/api/credits/add",
"method": "POST",
"jsonParameters": true,
"options": {},
"bodyParametersUi": {
"parameter": [
{
"name": "orderId",
"value": "={{$json.body.order_id}}"
},
{
"name": "amount",
"value": "={{$json.body.price_amount}}"
},
{
"name": "currency",
"value": "={{$json.body.price_currency}}"
}
]
},
"headerParametersUi": {
"parameter": [
{
"name": "x-acl-auth-key",
"value": "={{$env.ACL_AUTH_KEY || ''}}"
},
{
"name": "Content-Type",
"value": "application/json"
}
]
}
},
"name": "Add Credits",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 1,
"position": [
580,
0
]
},
{
"parameters": {
"subject": "Payment Received",
"text": "Payment {{$json.body.payment_id}} confirmed. Amount: {{$json.body.price_amount}} {{$json.body.price_currency}}",
"toEmail": "admin@academicchain.com"
},
"name": "Send Email",
"type": "n8n-nodes-base.emailSend",
"typeVersion": 1,
"position": [
780,
0
]
},
{
"parameters": {
"message": "\ud83d\udcb0 Payment Confirmed: {{$json.body.payment_id}}",
"options": {
"level": "info"
}
},
"name": "Registro de \u00e9xito",
"type": "n8n-nodes-base.logger",
"typeVersion": 1,
"position": [
780,
200
]
},
{
"parameters": {
"respondWith": "json",
"responseBody": "{\"success\": true, \"message\": \"IPN processed successfully\", \"orderId\": \"{{$json.body.order_id}}\", \"paymentId\": \"{{$json.body.payment_id}}\"}",
"options": {
"responseCode": 200
}
},
"name": "Responder \u00e9xito",
"type": "n8n-nodes-base.respondToWebhook",
"typeVersion": 1,
"position": [
980,
0
]
},
{
"parameters": {
"respondWith": "json",
"responseBody": "{\"success\": false, \"message\": \"Invalid IPN signature\"}",
"options": {
"responseCode": 401
}
},
"name": "Reject Invalid",
"type": "n8n-nodes-base.respondToWebhook",
"typeVersion": 1,
"position": [
380,
200
]
},
{
"parameters": {
"respondWith": "json",
"responseBody": "{\"success\": true, \"message\": \"IPN ignored (status not finished/confirmed)\"}",
"options": {
"responseCode": 200
}
},
"name": "Ignore Status",
"type": "n8n-nodes-base.respondToWebhook",
"typeVersion": 1,
"position": [
580,
200
]
}
],
"connections": {
"Webhook": {
"main": [
[
{
"node": "Validate IPN Signature",
"type": "main",
"index": 0
}
]
]
},
"Validate IPN Signature": {
"main": [
[
{
"node": "Is Signature Valid",
"type": "main",
"index": 0
}
]
]
},
"Is Signature Valid": {
"main": [
[
{
"node": "Check Status",
"type": "main",
"index": 0
}
],
[
{
"node": "Reject Invalid",
"type": "main",
"index": 0
}
]
]
},
"Check Status": {
"main": [
[
{
"node": "Add Credits",
"type": "main",
"index": 0
}
],
[
{
"node": "Ignore Status",
"type": "main",
"index": 0
}
]
]
},
"Add Credits": {
"main": [
[
{
"node": "Send Email",
"type": "main",
"index": 0
},
{
"node": "Registro de \u00e9xito",
"type": "main",
"index": 0
},
{
"node": "Responder \u00e9xito",
"type": "main",
"index": 0
}
]
]
}
}
}
For the full experience including quality scoring and batch install features for each workflow upgrade to Pro
About this workflow
Payment Gateway - IPN Handler. Uses httpRequest, emailSend, logger. Webhook trigger; 10 nodes.
Source: https://github.com/Aether-Connect-Labs/AcademicChain-Ledger/blob/fa748a164c32fb5f86a74b22fc98643087da7e22/n8n/workflows/payment-ipn.json — original creator credit. Request a take-down →
Related workflows
Workflows that share integrations, category, or trigger type with this one. All free to copy and import.
세미나 데모 용 워크플로우. Uses httpRequest, emailSend. Webhook trigger; 17 nodes.
VenueDesk - Cancel Booking (Series Support). Uses emailSend, httpRequest. Webhook trigger; 17 nodes.
worklow_doc. Uses httpRequest, readBinaryFile, n8n-nodes-docxtemplater, emailSend. Webhook trigger; 15 nodes.
WF2 - Upload Manual | JurisAI. Uses httpRequest, emailSend. Webhook trigger; 15 nodes.
Deliver personalized files instantly after PayPal transactions using n8n – without writing a single backend line.