Best Amplitude Digital Analytics Phone Validation API & Email Verification Integration 2025

// Initialize Amplitude with 1lookup validation integration
import * as amplitude from '@amplitude/analytics-browser';

// Configure Amplitude
amplitude.init('YOUR_AMPLITUDE_API_KEY');

// Enhanced event tracking with contact validation
async function trackAmplitudeEventWithValidation(eventType, eventProperties) {
  try {
    // Validate contact information if present
    if (eventProperties.user_email || eventProperties.user_phone) {
      const validationData = await validateUserContact({
        phone: eventProperties.user_phone,
        email: eventProperties.user_email
      });
      
      // Enhance event properties with validation results
      const enhancedProperties = {
        ...eventProperties,
        // Phone validation results
        phone_validation_status: validationData.phone?.is_valid,
        phone_carrier: validationData.phone?.carrier_details?.name,
        phone_line_type: validationData.phone?.carrier_details?.type,
        phone_country: validationData.phone?.location_details?.country,
        phone_risk_level: validationData.phone?.risk_assessment?.risk_level,
        // Email validation results
        email_validation_status: validationData.email?.is_valid,
        email_deliverability: validationData.email?.deliverability?.status,
        email_risk_level: validationData.email?.risk_assessment?.risk_level,
        // Combined quality scoring
        contact_quality_score: calculateContactQualityScore(validationData),
        user_quality_tier: determineUserQualityTier(validationData),
        validation_timestamp: new Date().toISOString()
      };
      
      // Track enhanced event with validation data
      amplitude.track(eventType, enhancedProperties);
      
      // Track validation insights for analytics optimization
      amplitude.track('Contact Validation Insight', {
        validation_type: 'event_enhancement',
        event_type: eventType,
        phone_valid: validationData.phone?.is_valid,
        email_valid: validationData.email?.is_valid,
        quality_score: enhancedProperties.contact_quality_score
      });
      
    } else {
      // Track normal event without validation
      amplitude.track(eventType, eventProperties);
    }
  } catch (error) {
    console.error('Amplitude validation error:', error);
    // Fallback to normal tracking
    amplitude.track(eventType, eventProperties);
  }
}

// Contact validation function
async function validateUserContact(contactData) {
  const response = await fetch('https://app.1lookup.io/api/v1/validate', {
    method: 'POST',
    headers: {
      'Authorization': 'Bearer YOUR_1LOOKUP_API_KEY',
      'Content-Type': 'application/json'
    },
    body: JSON.stringify(contactData)
  });
  
  if (!response.ok) {
    throw new Error(`Validation failed: ${response.status}`);
  }
  
  return await response.json();
}

// Calculate contact quality score
function calculateContactQualityScore(validationData) {
  let score = 0;
  
  // Email scoring
  if (validationData.email?.is_valid) score += 40;
  if (validationData.email?.deliverability?.status === 'deliverable') score += 10;
  
  // Phone scoring
  if (validationData.phone?.is_valid) score += 40;
  if (validationData.phone?.risk_assessment?.risk_level === 'low') score += 10;
  
  return Math.min(100, score);
}

const { Amplitude } = require('@amplitude/node');

// Initialize Amplitude server SDK
const amplitude = Amplitude.init('YOUR_AMPLITUDE_API_KEY');

// Enhanced user identification with validation
async function identifyUserWithValidation(userId, userProperties) {
  try {
    // Validate user contact information
    const validation = await validateUserContacts(userProperties);
    
    // Prepare enhanced user properties
    const enhancedUserProperties = {
      ...userProperties,
      // Phone validation properties
      phone_validation_status: validation.phone?.is_valid ? 'Valid' : 'Invalid',
      phone_carrier: validation.phone?.carrier_details?.name || '',
      phone_line_type: validation.phone?.carrier_details?.type || '',
      phone_country: validation.phone?.location_details?.country || '',
      phone_risk_level: validation.phone?.risk_assessment?.risk_level || '',
      // Email validation properties
      email_validation_status: validation.email?.is_valid ? 'Valid' : 'Invalid',
      email_deliverability: validation.email?.deliverability?.status || '',
      email_risk_level: validation.email?.risk_assessment?.risk_level || '',
      // Analytics enhancement properties
      contact_quality_score: calculateUserQualityScore(validation),
      user_quality_tier: determineUserTier(validation),
      is_high_quality_user: isHighQualityUser(validation),
      fraud_risk_indicators: extractFraudIndicators(validation),
      validation_date: new Date().toISOString()
    };
    
    // Identify user with enhanced properties
    amplitude.identify({
      user_id: userId,
      user_properties: enhancedUserProperties
    });
    
    // Track user validation event for analytics
    amplitude.track({
      user_id: userId,
      event_type: 'User Contact Validated',
      event_properties: {
        validation_method: 'profile_enhancement',
        phone_valid: validation.phone?.is_valid,
        email_valid: validation.email?.is_valid,
        quality_score: enhancedUserProperties.contact_quality_score,
        user_tier: enhancedUserProperties.user_quality_tier
      }
    });
    
    return { success: true, validation, userProperties: enhancedUserProperties };
    
  } catch (error) {
    console.error('User validation error:', error);
    
    // Fallback identification without validation
    amplitude.identify({
      user_id: userId,
      user_properties: {
        ...userProperties,
        validation_error: true,
        validation_error_message: error.message
      }
    });
    
    return { success: false, error: error.message };
  }
}

// Determine user quality tier based on validation
function determineUserTier(validation) {
  const qualityScore = calculateUserQualityScore(validation);
  
  if (qualityScore >= 80) return 'premium';
  if (qualityScore >= 60) return 'high';
  if (qualityScore >= 40) return 'medium';
  return 'low';
}

// Advanced behavioral tracking with contact validation analytics
class AmplitudeBehaviorTracker {
  constructor(amplitudeApiKey, lookupApiKey) {
    this.amplitude = amplitude;
    this.lookupApiKey = lookupApiKey;
    amplitude.init(amplitudeApiKey);
  }
  
  async trackUserBehaviorWithValidation(userId, behaviorType, behaviorData) {
    try {
      // Get user validation data from cache or validate
      const userValidation = await this.getUserValidationData(userId);
      
      // Calculate behavior quality score
      const behaviorQuality = this.calculateBehaviorQuality(behaviorType, userValidation);
      
      // Enhanced behavior event
      const behaviorEvent = {
        user_id: userId,
        behavior_type: behaviorType,
        behavior_quality_score: behaviorQuality,
        // User contact insights
        user_quality_tier: userValidation.quality_tier,
        contact_validation_status: userValidation.overall_status,
        phone_carrier: userValidation.phone_carrier,
        user_country: userValidation.phone_country,
        email_deliverability: userValidation.email_deliverability,
        fraud_risk_level: userValidation.fraud_risk_level,
        // Behavior-specific data
        ...behaviorData,
        // Analytics enhancement
        is_qualified_behavior: behaviorQuality >= 70,
        behavior_confidence_score: this.calculateBehaviorConfidence(userValidation),
        attribution_weight: this.calculateAttributionWeight(userValidation)
      };
      
      // Track enhanced behavior event
      amplitude.track('User Behavior', behaviorEvent);
      
      // Track behavioral analytics insight
      amplitude.track('Behavioral Analytics Insight', {
        behavior_type: behaviorType,
        user_quality_tier: userValidation.quality_tier,
        behavior_quality_score: behaviorQuality,
        has_quality_indicators: behaviorQuality >= 80
      });
      
      // Update user behavioral profile
      this.updateBehavioralProfile(userId, behaviorType, behaviorQuality);
      
    } catch (error) {
      console.error('Behavioral tracking error:', error);
      // Fallback tracking
      amplitude.track('User Behavior', {
        behavior_type: behaviorType,
        ...behaviorData,
        validation_error: true
      });
    }
  }
  
  calculateBehaviorQuality(behaviorType, userValidation) {
    let baseScore = 0;
    
    // Contact quality impact on behavior scoring
    if (userValidation.phone_valid) baseScore += 30;
    if (userValidation.email_valid) baseScore += 30;
    if (userValidation.email_deliverability === 'deliverable') baseScore += 20;
    if (userValidation.fraud_risk_level === 'low') baseScore += 20;
    
    // Behavior-specific scoring adjustments
    const behaviorMultipliers = {
      'page_view': 1.0,
      'button_click': 1.1,
      'form_submission': 1.3,
      'purchase': 1.5,
      'subscription': 1.6,
      'referral': 1.4
    };
    
    return Math.min(100, baseScore * (behaviorMultipliers[behaviorType] || 1.0));
  }
  
  async trackConversionWithContactAnalytics(userId, conversionEvent, conversionValue) {
    try {
      const userValidation = await this.getUserValidationData(userId);
      
      // Enhanced conversion tracking
      const conversionData = {
        user_id: userId,
        conversion_event: conversionEvent,
        conversion_value: conversionValue,
        // Contact validation insights
        user_quality_score: userValidation.quality_score,
        is_high_quality_conversion: userValidation.quality_score >= 80,
        phone_carrier: userValidation.phone_carrier,
        email_deliverability: userValidation.email_deliverability,
        conversion_confidence: this.calculateConversionConfidence(userValidation),
        // Attribution enhancement
        attribution_weight: this.calculateAttributionWeight(userValidation),
        fraud_risk_level: userValidation.fraud_risk_level,
        is_trusted_conversion: userValidation.fraud_risk_level === 'low'
      };
      
      amplitude.track('Conversion', conversionData);
      
      // Track conversion quality analytics
      amplitude.track('Conversion Quality Analytics', {
        conversion_event: conversionEvent,
        quality_tier: userValidation.quality_tier,
        conversion_confidence: conversionData.conversion_confidence,
        is_high_value: conversionValue > 100 && userValidation.quality_score >= 70
      });
      
    } catch (error) {
      console.error('Conversion tracking error:', error);
    }
  }
}

// Advanced cohort analysis with contact validation insights
class AmplitudeCohortAnalyzer {
  constructor(amplitudeApiKey, lookupApiKey) {
    this.amplitude = amplitude;
    this.lookupApiKey = lookupApiKey;
    amplitude.init(amplitudeApiKey);
  }
  
  async trackCohortEventWithValidation(userId, cohortEvent, eventProperties) {
    try {
      // Get user validation data
      const userValidation = await this.getUserValidationCache(userId);
      
      // Calculate cohort quality metrics
      const cohortMetrics = this.calculateCohortQuality(userValidation);
      
      // Enhanced cohort event
      const cohortEventData = {
        user_id: userId,
        cohort_event: cohortEvent,
        // Contact quality segmentation
        contact_quality_score: userValidation.quality_score,
        user_quality_tier: userValidation.quality_tier,
        phone_carrier_type: userValidation.phone_carrier_type,
        email_domain_type: userValidation.email_domain_type,
        geographic_region: userValidation.phone_country,
        // Cohort analytics enhancement
        cohort_quality_segment: cohortMetrics.quality_segment,
        retention_probability: cohortMetrics.retention_probability,
        ltv_prediction_tier: cohortMetrics.ltv_tier,
        fraud_risk_level: userValidation.fraud_risk_level,
        // Event-specific properties
        ...eventProperties,
        // Analytics metadata
        is_high_value_user: cohortMetrics.is_high_value,
        attribution_confidence: cohortMetrics.attribution_confidence
      };
      
      // Track cohort event
      amplitude.track('Cohort Event', cohortEventData);
      
      // Track cohort quality analytics
      amplitude.track('Cohort Quality Analytics', {
        cohort_event: cohortEvent,
        quality_segment: cohortMetrics.quality_segment,
        retention_probability: cohortMetrics.retention_probability,
        user_count: 1 // for aggregation
      });
      
      // Update user cohort profile
      this.updateUserCohortProfile(userId, cohortMetrics);
      
    } catch (error) {
      console.error('Cohort tracking error:', error);
    }
  }
  
  calculateCohortQuality(userValidation) {
    const qualityScore = userValidation.quality_score || 0;
    
    // Determine quality segment
    let qualitySegment;
    if (qualityScore >= 85) qualitySegment = 'premium';
    else if (qualityScore >= 70) qualitySegment = 'high';
    else if (qualityScore >= 50) qualitySegment = 'medium';
    else qualitySegment = 'low';
    
    // Calculate retention probability based on contact quality
    const retentionProbability = Math.min(95, qualityScore * 0.8 + 20);
    
    // Determine LTV prediction tier
    let ltvTier;
    if (qualityScore >= 80 && userValidation.fraud_risk_level === 'low') ltvTier = 'high';
    else if (qualityScore >= 60) ltvTier = 'medium';
    else ltvTier = 'low';
    
    return {
      quality_segment: qualitySegment,
      retention_probability: Math.round(retentionProbability),
      ltv_tier: ltvTier,
      is_high_value: qualityScore >= 75 && userValidation.fraud_risk_level === 'low',
      attribution_confidence: Math.min(100, qualityScore + 10)
    };
  }
  
  async trackRetentionAnalyticsWithContactInsights(userId, retentionEvent, daysSinceFirst) {
    try {
      const userValidation = await this.getUserValidationCache(userId);
      
      // Enhanced retention analytics
      const retentionData = {
        user_id: userId,
        retention_event: retentionEvent,
        days_since_first_use: daysSinceFirst,
        // Contact quality impact on retention
        user_quality_score: userValidation.quality_score,
        quality_tier_at_acquisition: userValidation.quality_tier,
        phone_validation_status: userValidation.phone_valid,
        email_deliverability: userValidation.email_deliverability,
        // Retention prediction
        predicted_retention_rate: this.predictRetentionRate(userValidation, daysSinceFirst),
        is_at_risk_user: this.isUserAtRisk(userValidation, daysSinceFirst),
        // Geographic and carrier insights
        user_region: userValidation.phone_country,
        carrier_type: userValidation.phone_carrier_type,
        // Analytics enhancement
        retention_confidence: this.calculateRetentionConfidence(userValidation)
      };
      
      amplitude.track('Retention Analytics', retentionData);
      
      // Track retention insights for optimization
      if (daysSinceFirst === 7 || daysSinceFirst === 30) {
        amplitude.track('Retention Milestone', {
          milestone_day: daysSinceFirst,
          user_quality_tier: userValidation.quality_tier,
          milestone_reached: true,
          quality_impact_score: this.calculateQualityImpactOnRetention(userValidation)
        });
      }
      
    } catch (error) {
      console.error('Retention analytics error:', error);
    }
  }
}