{
  "meta": {
    "instanceId": "sms-campaigns-workflow",
    "name": "Marketing SMS Campaigns",
    "description": "TCPA compliant SMS campaign management"
  },
  "nodes": [
    {
      "parameters": {},
      "name": "Campaign Webhook",
      "type": "n8n-nodes-base.webhook",
      "position": [100, 300]
    },
    {
      "parameters": {
        "functionCode": `
// CRITICAL: TCPA compliance validation
const phone = $input.item.json.phone;
const optIn = await $getWorkflowStaticData('node').optIns[phone];
const dnc = await $getWorkflowStaticData('node').dncList[phone];

if (!optIn) {
  throw new Error('TCPA Violation: No opt-in consent');
}

if (dnc) {
  throw new Error('DNC Violation: Phone on Do Not Call list');
}

// Log compliance check
await $logs.push({phone, optIn, dnc, timestamp: new Date()});

return $input.item.json;`
      },
      "name": "TCPA Compliance Check",
      "type": "n8n-nodes-base.function",
      "position": [300, 300]
    },
    {
      "parameters": {
        "conditions": {
          "routing": [
            {"provider": "Twilio", "destination": "Twilio SMS API"},
            {"provider": "Plivo", "destination": "Plivo SMS API"}
          ]
        }
      },
      "name": "SMS Provider Switch",
      "type": "n8n-nodes-base.switch",
      "position": [500, 300]
    },
    {
      "parameters": {
        "errorHandling": {
          "default": "Opt-Out Confirmation",
          "timeout": 1000
        }
      },
      "name": "Opt-Out Processing",
      "type": "n8n-nodes-base.function",
      "position": [700, 300]
    }
  ],
  "connections": {
    "Campaign Webhook": {
      "main": [
        {"node": "TCPA Compliance Check"}
      ]
    },
    "TCPA Compliance Check": {
      "main": [
        {"node": "SMS Provider Switch"}
      ]
    },
    "SMS Provider Switch": {
      "main": [
        {"node": "Opt-Out Processing"}
      ]
    }
  }
}