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": "SIGE \u2014 Proposta Expirando (Lembrete por Email + WhatsApp)",
"nodes": [
{
"parameters": {
"httpMethod": "POST",
"path": "sige-proposta-expirando",
"responseMode": "onReceived",
"responseData": "allEntries",
"options": {
"rawBody": true
}
},
"id": "webhook-in",
"name": "Webhook (POST)",
"type": "n8n-nodes-base.webhook",
"typeVersion": 1,
"position": [
240,
300
]
},
{
"parameters": {
"functionCode": "// Valida\u00e7\u00e3o HMAC-SHA256 (X-Signature) \u2014 segredo em $env.N8N_WEBHOOK_SECRET.\nconst crypto = require('crypto');\nconst secret = $env.N8N_WEBHOOK_SECRET || '';\nconst given = ($input.first().json.headers || {})['x-signature'] || '';\nlet body = $input.first().json.body ? JSON.stringify($input.first().json.body) : '';\ntry {\n if ($input.first().binary && $input.first().binary.data) {\n body = Buffer.from($input.first().binary.data, 'base64').toString('utf8');\n }\n} catch (e) {}\nif (!secret) return [{ json: { ...$input.first().json, _signature_skipped: 'no_secret' } }];\nconst expected = crypto.createHmac('sha256', secret).update(body, 'utf8').digest('hex');\nconst ok = expected.length === given.length && crypto.timingSafeEqual(Buffer.from(expected), Buffer.from(given));\nif (!ok) throw new Error('Assinatura HMAC inv\u00e1lida (X-Signature n\u00e3o confere)');\nreturn [{ json: { ...$input.first().json, _signature_ok: true } }];"
},
"id": "validate-hmac",
"name": "Validar Assinatura HMAC",
"type": "n8n-nodes-base.function",
"typeVersion": 1,
"position": [
460,
300
]
},
{
"parameters": {
"functionCode": "// Normaliza payload do evento `proposta.expirando`.\nconst body = $input.first().json.body || $input.first().json;\nconst d = (body && body.data) || {};\nreturn [{\n json: {\n cliente_nome: d.cliente_nome || 'Cliente',\n cliente_email: d.cliente_email || '',\n cliente_telefone: d.cliente_telefone || '',\n proposta_numero: d.proposta_numero || '',\n proposta_versao: d.proposta_versao || 1,\n valor_total: d.valor_total || 0,\n data_validade: d.data_validade || '',\n dias_restantes: d.dias_restantes || 0,\n validade_dias: d.validade_dias || null,\n portal_url: d.portal_url || '',\n admin_id: body.admin_id || null\n }\n}];"
},
"id": "extract",
"name": "Extrair Dados",
"type": "n8n-nodes-base.function",
"typeVersion": 1,
"position": [
680,
300
]
},
{
"parameters": {
"conditions": {
"string": [
{
"value1": "={{ $json[\"cliente_email\"] }}",
"operation": "isNotEmpty"
}
]
}
},
"id": "if-has-email",
"name": "Tem e-mail?",
"type": "n8n-nodes-base.if",
"typeVersion": 1,
"position": [
900,
200
]
},
{
"parameters": {
"conditions": {
"string": [
{
"value1": "={{ $json[\"cliente_telefone\"] }}",
"operation": "isNotEmpty"
}
]
}
},
"id": "if-has-phone",
"name": "Tem WhatsApp?",
"type": "n8n-nodes-base.if",
"typeVersion": 1,
"position": [
900,
420
]
},
{
"parameters": {
"fromEmail": "={{ $env.SIGE_FROM_EMAIL }}",
"toEmail": "={{ $json[\"cliente_email\"] }}",
"subject": "Sua proposta {{ $json[\"proposta_numero\"] }} expira em {{ $json[\"dias_restantes\"] }} dia(s)",
"text": "Ol\u00e1 {{ $json[\"cliente_nome\"] }},\n\nA proposta n\u00ba {{ $json[\"proposta_numero\"] }} (vers\u00e3o {{ $json[\"proposta_versao\"] }}) que enviamos expira em {{ $json[\"dias_restantes\"] }} dia(s) \u2014 {{ $json[\"data_validade\"] }}.\n\nValor: R$ {{ $json[\"valor_total\"] }}\n\nVoc\u00ea pode revisar e aprovar diretamente no portal do cliente:\n{{ $json[\"portal_url\"] }}\n\nQualquer d\u00favida, \u00e9 s\u00f3 responder este e-mail."
},
"id": "send-email",
"name": "Enviar E-mail",
"type": "n8n-nodes-base.emailSend",
"typeVersion": 2,
"position": [
1140,
200
],
"credentials": {
"smtp": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"method": "POST",
"url": "={{ $env.EVOLUTION_API_URL }}/message/sendText/{{ $env.EVOLUTION_INSTANCE }}",
"sendHeaders": true,
"headerParameters": {
"parameters": [
{
"name": "apikey",
"value": "={{ $env.EVOLUTION_API_KEY }}"
},
{
"name": "Content-Type",
"value": "application/json"
}
]
},
"sendBody": true,
"bodyContentType": "json",
"jsonBody": "={\n \"number\": \"{{ $json[\"cliente_telefone\"] }}\",\n \"text\": \"Ol\u00e1 *{{ $json[\\\"cliente_nome\\\"] }}*!\\n\\nLembrete: sua proposta *{{ $json[\\\"proposta_numero\\\"] }}* (v{{ $json[\\\"proposta_versao\\\"] }}) expira em *{{ $json[\\\"dias_restantes\\\"] }} dia(s)* ({{ $json[\\\"data_validade\\\"] }}).\\n\\n\ud83d\udcb0 Valor: R$ {{ $json[\\\"valor_total\\\"] }}\\n\ud83d\udc49 {{ $json[\\\"portal_url\\\"] }}\"\n}"
},
"id": "send-whatsapp",
"name": "Enviar WhatsApp",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.1,
"position": [
1140,
420
]
}
],
"connections": {
"Webhook (POST)": {
"main": [
[
{
"node": "Validar Assinatura HMAC",
"type": "main",
"index": 0
}
]
]
},
"Validar Assinatura HMAC": {
"main": [
[
{
"node": "Extrair Dados",
"type": "main",
"index": 0
}
]
]
},
"Extrair Dados": {
"main": [
[
{
"node": "Tem e-mail?",
"type": "main",
"index": 0
},
{
"node": "Tem WhatsApp?",
"type": "main",
"index": 0
}
]
]
},
"Tem e-mail?": {
"main": [
[
{
"node": "Enviar E-mail",
"type": "main",
"index": 0
}
],
[]
]
},
"Tem WhatsApp?": {
"main": [
[
{
"node": "Enviar WhatsApp",
"type": "main",
"index": 0
}
],
[]
]
}
},
"active": false,
"settings": {},
"tags": [
{
"name": "sige"
},
{
"name": "propostas"
}
],
"_meta": {
"description": "Workflow exemplo para o evento `proposta.expirando` (disparado pelo job di\u00e1rio `flask emitir-propostas-expirando`).",
"env_obrigatorias": [
"N8N_WEBHOOK_SECRET",
"SIGE_FROM_EMAIL",
"EVOLUTION_API_URL",
"EVOLUTION_INSTANCE",
"EVOLUTION_API_KEY"
]
}
}
Credentials you'll need
Each integration node will prompt for credentials when you import. We strip credential IDs before publishing — you'll add your own.
smtp
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About this workflow
SIGE — Proposta Expirando (Lembrete por Email + WhatsApp). Uses emailSend, httpRequest. Webhook trigger; 7 nodes.
Source: https://github.com/cassioviller/EnterpriseSync-1/blob/d49292fa8a6be50d61f4642711875e73f44fce4a/n8n_workflows/proposta_expirando.json — original creator credit. Request a take-down →
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