How to Setup Stablecoin FATF Travel Rule: Cross-Border Transaction Reporting

// FATF Travel Rule compliance engine for stablecoins
class TravelRuleComplianceEngine {
  constructor() {
    this.thresholds = {
      USD: 1000,
      EUR: 1000,
      GBP: 1000,
      // Dynamic thresholds based on jurisdiction
      jurisdictional_thresholds: new Map()
    };
    this.dataRequirements = new TravelRuleDataRequirements();
    this.transmissionProtocols = new TransmissionProtocolManager();
  }

  async assessTravelRuleApplicability(transaction) {
    const assessment = {
      threshold_exceeded: await this.checkThreshold(transaction),
      cross_border: await this.isCrossBorderTransaction(transaction),
      covered_activity: await this.isCoveredActivity(transaction),
      exemptions: await this.checkExemptions(transaction),
      jurisdictional_requirements: await this.getJurisdictionalRequirements(transaction)
    };

    return {
      travel_rule_required: this.determineTravelRuleRequirement(assessment),
      required_data_elements: await this.getRequiredDataElements(transaction, assessment),
      transmission_method: await this.selectTransmissionMethod(transaction, assessment),
      compliance_deadline: this.calculateComplianceDeadline(transaction),
      assessment_details: assessment
    };
  }

  async getRequiredDataElements(transaction, assessment) {
    const baseRequirements = {
      // Originator information (sending customer)
      originator: {
        name: { required: true, validation: 'full_legal_name' },
        address: { required: true, validation: 'complete_address' },
        account_number: { required: true, validation: 'wallet_address_or_account_id' },
        customer_identification: { required: true, validation: 'government_id_number' },
        date_of_birth: { required: false, conditional: 'high_risk_jurisdiction' },
        place_of_birth: { required: false, conditional: 'enhanced_due_diligence' }
      },

      // Beneficiary information (receiving customer)
      beneficiary: {
        name: { required: true, validation: 'full_legal_name' },
        address: { required: false, conditional: 'threshold_over_3000_usd' },
        account_number: { required: true, validation: 'wallet_address_or_account_id' }
      },

      // Transaction information
      transaction: {
        amount: { required: true, validation: 'exact_amount_and_currency' },
        transaction_date: { required: true, validation: 'iso_8601_format' },
        transaction_reference: { required: true, validation: 'unique_identifier' },
        purpose_of_transaction: { required: false, conditional: 'suspicious_activity' }
      },

      // Ordering and beneficiary institution information
      institutions: {
        ordering_institution: await this.getOrderingInstitutionInfo(transaction),
        beneficiary_institution: await this.getBeneficiaryInstitutionInfo(transaction)
      }
    };

    // Apply jurisdictional enhancements
    const enhancedRequirements = await this.applyJurisdictionalEnhancements(
      baseRequirements, 
      assessment.jurisdictional_requirements
    );

    return enhancedRequirements;
  }

  async checkThreshold(transaction) {
    const baseCurrency = 'USD';
    const thresholdAmount = this.thresholds[baseCurrency];
    
    // Convert transaction amount to USD for threshold comparison
    const usdAmount = await this.convertToUSD(transaction.amount, transaction.currency);
    
    return {
      threshold_exceeded: usdAmount >= thresholdAmount,
      usd_equivalent: usdAmount,
      applicable_threshold: thresholdAmount,
      conversion_rate: await this.getConversionRate(transaction.currency, baseCurrency),
      conversion_timestamp: new Date()
    };
  }
}

// Travel Rule data collection and validation system
class TravelRuleDataCollector {
  constructor() {
    this.validator = new TravelRuleDataValidator();
    this.enrichment = new DataEnrichmentService();
    this.storage = new SecureDataStorage();
  }

  async collectTravelRuleData(transaction, userContext) {
    const dataCollection = {
      // Collect originator data
      originator_data: await this.collectOriginatorData(transaction.sender, userContext),
      
      // Collect beneficiary data
      beneficiary_data: await this.collectBeneficiaryData(transaction.recipient, userContext),
      
      // Enrich with institutional data
      institutional_data: await this.collectInstitutionalData(transaction),
      
      // Validate completeness and accuracy
      validation_results: await this.validateCollectedData(transaction),
      
      // Generate transmission package
      transmission_package: await this.generateTransmissionPackage(transaction)
    };

    return dataCollection;
  }

  async collectOriginatorData(sender, context) {
    const originatorData = {
      // Required fields
      full_name: await this.getVerifiedName(sender.user_id),
      address: await this.getVerifiedAddress(sender.user_id),
      account_identifier: sender.wallet_address,
      
      // Customer identification
      customer_id: await this.getCustomerIdentificationNumber(sender.user_id),
      
      // Enhanced data for high-risk scenarios
      date_of_birth: context.enhanced_due_diligence ? 
        await this.getDateOfBirth(sender.user_id) : null,
      place_of_birth: context.enhanced_due_diligence ? 
        await this.getPlaceOfBirth(sender.user_id) : null,
      nationality: context.cross_border ? 
        await this.getNationality(sender.user_id) : null,

      // Business entity information (if applicable)
      legal_entity_data: sender.entity_type === 'business' ? 
        await this.getLegalEntityData(sender.user_id) : null
    };

    // Validate data completeness
    const validation = await this.validator.validateOriginatorData(originatorData, context);
    
    if (!validation.complete) {
      await this.initiateDataCollectionWorkflow(sender.user_id, validation.missing_fields);
    }

    return {
      data: originatorData,
      validation: validation,
      collection_timestamp: new Date(),
      data_source: 'kyc_verified_records'
    };
  }

  async collectBeneficiaryData(recipient, context) {
    let beneficiaryData = {
      // Always required
      full_name: null,
      account_identifier: recipient.wallet_address,
      
      // Conditionally required
      address: context.threshold_over_3000 ? null : 'not_required'
    };

    // Attempt to collect from internal records first
    if (recipient.internal_user) {
      beneficiaryData = await this.getInternalUserData(recipient.user_id, context);
    } else {
      // External recipient - attempt data collection via various methods
      beneficiaryData = await this.collectExternalBeneficiaryData(recipient, context);
    }

    return {
      data: beneficiaryData,
      collection_method: recipient.internal_user ? 'internal_records' : 'external_collection',
      completeness_score: await this.calculateCompletenessScore(beneficiaryData, context),
      collection_timestamp: new Date()
    };
  }

  async collectExternalBeneficiaryData(recipient, context) {
    const collectionMethods = [
      // Method 1: Direct API integration with receiving VASP
      async () => await this.queryReceivingVASP(recipient.wallet_address),
      
      // Method 2: Industry data sharing networks
      async () => await this.queryIndustryNetworks(recipient.wallet_address),
      
      // Method 3: Blockchain analysis and attribution
      async () => await this.performBlockchainAttribution(recipient.wallet_address),
      
      // Method 4: User-provided information
      async () => await this.requestUserProvidedData(recipient)
    ];

    let collectedData = null;
    let successfulMethod = null;

    // Try each collection method in order of preference
    for (const [index, method] of collectionMethods.entries()) {
      try {
        const result = await method();
        if (result && result.completeness_score > 0.7) {
          collectedData = result;
          successfulMethod = index + 1;
          break;
        }
      } catch (error) {
        console.warn(`Collection method ${index + 1} failed:`, error.message);
      }
    }

    return {
      collected_data: collectedData,
      collection_method: successfulMethod,
      fallback_required: !collectedData || collectedData.completeness_score < 0.8
    };
  }

  async validateCollectedData(transactionData) {
    const validationResults = {
      originator_validation: await this.validator.validateOriginator(transactionData.originator_data),
      beneficiary_validation: await this.validator.validateBeneficiary(transactionData.beneficiary_data),
      transaction_validation: await this.validator.validateTransaction(transactionData.transaction),
      institutional_validation: await this.validator.validateInstitutional(transactionData.institutional_data),
      
      // Cross-field validations
      consistency_check: await this.validator.performConsistencyCheck(transactionData),
      sanctions_screening: await this.performSanctionsScreening(transactionData),
      pep_screening: await this.performPEPScreening(transactionData)
    };

    return {
      overall_validity: this.calculateOverallValidity(validationResults),
      validation_score: this.calculateValidationScore(validationResults),
      critical_errors: this.identifyCriticalErrors(validationResults),
      warnings: this.identifyWarnings(validationResults),
      validation_details: validationResults
    };
  }
}

// Travel Rule transmission protocol manager
class TravelRuleTransmissionManager {
  constructor() {
    this.protocols = {
      openvasp: new OpenVASPProtocol(),
      trisa: new TRISAProtocol(),
      sygna: new SygnaProtocol(),
      notabene: new NotabeneProtocol(),
      direct_api: new DirectAPIProtocol()
    };
    this.fallbackManager = new TransmissionFallbackManager();
  }

  async transmitTravelRuleData(transaction, travelRuleData) {
    const transmission = {
      // Determine optimal transmission method
      transmission_method: await this.selectTransmissionMethod(transaction),
      
      // Prepare transmission package
      transmission_package: await this.prepareTransmissionPackage(travelRuleData),
      
      // Execute transmission with fallback handling
      transmission_result: await this.executeTransmissionWithFallback(transaction, travelRuleData),
      
      // Handle response and confirmations
      confirmation_handling: await this.handleTransmissionConfirmation(transaction),
      
      // Audit and logging
      audit_trail: await this.logTransmissionAuditTrail(transaction, travelRuleData)
    };

    return transmission;
  }

  async selectTransmissionMethod(transaction) {
    const recipient = transaction.recipient;
    const recipientVASP = await this.identifyRecipientVASP(recipient.wallet_address);

    // Priority order for transmission methods
    const methodPreferences = [
      {
        method: 'trisa',
        condition: () => recipientVASP.trisa_enabled,
        benefits: ['end_to_end_encryption', 'regulatory_compliance', 'audit_trail']
      },
      {
        method: 'openvasp',
        condition: () => recipientVASP.openvasp_supported,
        benefits: ['open_standard', 'wide_adoption', 'cost_effective']
      },
      {
        method: 'sygna',
        condition: () => recipientVASP.sygna_bridge_connected,
        benefits: ['established_network', 'reliable_delivery', 'compliance_focused']
      },
      {
        method: 'direct_api',
        condition: () => recipientVASP.direct_api_available,
        benefits: ['direct_integration', 'real_time_processing', 'custom_fields']
      },
      {
        method: 'manual_process',
        condition: () => true, // Always available as fallback
        benefits: ['guaranteed_delivery', 'human_verification', 'regulatory_acceptable']
      }
    ];

    // Select first applicable method
    for (const method of methodPreferences) {
      if (await method.condition()) {
        return {
          selected_method: method.method,
          rationale: method.benefits,
          vasp_capabilities: recipientVASP,
          fallback_methods: methodPreferences.slice(methodPreferences.indexOf(method) + 1)
        };
      }
    }
  }

  async executeTransmissionWithFallback(transaction, travelRuleData) {
    const transmissionMethods = await this.selectTransmissionMethod(transaction);
    let currentMethod = transmissionMethods.selected_method;
    let attempt = 1;
    const maxAttempts = 3;

    while (attempt <= maxAttempts) {
      try {
        const protocol = this.protocols[currentMethod];
        const result = await protocol.transmit(transaction, travelRuleData);

        if (result.success) {
          return {
            success: true,
            method_used: currentMethod,
            attempt_number: attempt,
            transmission_id: result.transmission_id,
            confirmation_receipt: result.confirmation,
            timestamp: new Date()
          };
        }

        // If transmission failed, try fallback method
        if (transmissionMethods.fallback_methods.length > 0) {
          currentMethod = transmissionMethods.fallback_methods.shift().method;
          attempt++;
        } else {
          break;
        }

      } catch (error) {
        console.error(`Transmission attempt ${attempt} failed with method ${currentMethod}:`, error);
        
        if (attempt < maxAttempts && transmissionMethods.fallback_methods.length > 0) {
          currentMethod = transmissionMethods.fallback_methods.shift().method;
          attempt++;
        } else {
          return {
            success: false,
            final_method_attempted: currentMethod,
            total_attempts: attempt,
            error: error.message,
            manual_intervention_required: true
          };
        }
      }
    }

    return {
      success: false,
      exhausted_all_methods: true,
      manual_intervention_required: true,
      escalation_required: true
    };
  }

  async prepareTransmissionPackage(travelRuleData) {
    const package = {
      // Standard message format
      message_header: {
        message_id: this.generateUniqueMessageId(),
        timestamp: new Date().toISOString(),
        sender_vasp_id: process.env.VASP_IDENTIFIER,
        recipient_vasp_id: travelRuleData.recipient_vasp_id,
        message_type: 'travel_rule_info',
        protocol_version: '1.0'
      },

      // Travel Rule specific data
      travel_rule_info: {
        originator: {
          name: travelRuleData.originator.full_name,
          address: this.formatAddress(travelRuleData.originator.address),
          account_number: travelRuleData.originator.account_identifier,
          customer_identification: travelRuleData.originator.customer_id,
          date_of_birth: travelRuleData.originator.date_of_birth,
          place_of_birth: travelRuleData.originator.place_of_birth
        },

        beneficiary: {
          name: travelRuleData.beneficiary.full_name,
          account_number: travelRuleData.beneficiary.account_identifier,
          address: travelRuleData.beneficiary.address
        },

        transaction_info: {
          amount: travelRuleData.transaction.amount,
          currency: travelRuleData.transaction.currency,
          transaction_date: travelRuleData.transaction.date,
          transaction_reference: travelRuleData.transaction.reference,
          blockchain_hash: travelRuleData.transaction.hash
        },

        institutional_info: {
          ordering_institution: travelRuleData.institutions.ordering,
          beneficiary_institution: travelRuleData.institutions.beneficiary
        }
      },

      // Security and integrity
      message_signature: await this.signMessage(travelRuleData),
      encryption_info: await this.getEncryptionInfo(travelRuleData.recipient_vasp_id)
    };

    // Validate package before transmission
    const validation = await this.validateTransmissionPackage(package);
    if (!validation.valid) {
      throw new Error(`Invalid transmission package: ${validation.errors.join(', ')}`);
    }

    return package;
  }
}

// Travel Rule regulatory reporting system
class TravelRuleReportingSystem {
  constructor() {
    this.reportGenerator = new RegulatoryReportGenerator();
    this.auditLogger = new ComprehensiveAuditLogger();
    this.regulatorySubmitter = new RegulatorySubmissionManager();
  }

  async generateTravelRuleReport(reportingPeriod, jurisdiction) {
    const report = {
      // Report metadata
      report_header: {
        reporting_institution: await this.getInstitutionInfo(),
        reporting_period: reportingPeriod,
        jurisdiction: jurisdiction,
        report_type: 'travel_rule_compliance',
        generation_timestamp: new Date(),
        report_version: '1.0'
      },

      // Statistical summary
      summary_statistics: await this.generateSummaryStatistics(reportingPeriod),

      // Transaction details
      covered_transactions: await this.getCoveredTransactions(reportingPeriod),
      
      // Compliance metrics
      compliance_metrics: await this.generateComplianceMetrics(reportingPeriod),
      
      // Exception reports
      exceptions_and_violations: await this.identifyExceptions(reportingPeriod),
      
      // System performance
      system_performance: await this.generateSystemPerformanceMetrics(reportingPeriod),
      
      // Regulatory submissions
      regulatory_submissions: await this.getRegulatoryCommunications(reportingPeriod)
    };

    return report;
  }

  async generateSummaryStatistics(reportingPeriod) {
    const stats = {
      total_transactions: await this.countTotalTransactions(reportingPeriod),
      travel_rule_applicable: await this.countTravelRuleTransactions(reportingPeriod),
      cross_border_transactions: await this.countCrossBorderTransactions(reportingPeriod),
      total_volume: await this.calculateTotalVolume(reportingPeriod),
      
      geographic_breakdown: await this.generateGeographicBreakdown(reportingPeriod),
      currency_breakdown: await this.generateCurrencyBreakdown(reportingPeriod),
      institution_breakdown: await this.generateInstitutionBreakdown(reportingPeriod),
      
      compliance_rates: {
        successful_transmissions: await this.calculateSuccessfulTransmissions(reportingPeriod),
        data_completeness_rate: await this.calculateDataCompletenessRate(reportingPeriod),
        timely_transmission_rate: await this.calculateTimelyTransmissionRate(reportingPeriod)
      }
    };

    return stats;
  }

  async generateComplianceMetrics(reportingPeriod) {
    const metrics = {
      // Data quality metrics
      data_quality: {
        completeness_score: await this.calculateDataCompletenessScore(reportingPeriod),
        accuracy_score: await this.calculateDataAccuracyScore(reportingPeriod),
        timeliness_score: await this.calculateDataTimelinessScore(reportingPeriod),
        consistency_score: await this.calculateDataConsistencyScore(reportingPeriod)
      },

      // Transmission metrics
      transmission_performance: {
        successful_transmissions: await this.countSuccessfulTransmissions(reportingPeriod),
        failed_transmissions: await this.countFailedTransmissions(reportingPeriod),
        average_transmission_time: await this.calculateAverageTransmissionTime(reportingPeriod),
        retry_rate: await this.calculateRetryRate(reportingPeriod)
      },

      // Compliance violations
      violations: {
        missing_data_violations: await this.countMissingDataViolations(reportingPeriod),
        late_transmission_violations: await this.countLateTransmissionViolations(reportingPeriod),
        data_quality_violations: await this.countDataQualityViolations(reportingPeriod),
        system_failure_violations: await this.countSystemFailureViolations(reportingPeriod)
      },

      // Remediation actions
      remediation: {
        violations_remediated: await this.countRemediatedViolations(reportingPeriod),
        average_remediation_time: await this.calculateAverageRemediationTime(reportingPeriod),
        outstanding_violations: await this.countOutstandingViolations(reportingPeriod),
        prevention_measures_implemented: await this.countPreventionMeasures(reportingPeriod)
      }
    };

    return metrics;
  }

  async createComprehensiveAuditTrail(transaction, travelRuleData) {
    const auditTrail = {
      // Transaction identification
      transaction_id: transaction.id,
      blockchain_hash: transaction.hash,
      timestamp: transaction.timestamp,

      // Travel Rule assessment
      travel_rule_assessment: {
        threshold_check: await this.auditThresholdCheck(transaction),
        cross_border_determination: await this.auditCrossBorderDetermination(transaction),
        exemption_analysis: await this.auditExemptionAnalysis(transaction),
        applicability_conclusion: travelRuleData.applicable
      },

      // Data collection audit
      data_collection: {
        originator_data_collection: await this.auditOriginatorDataCollection(travelRuleData),
        beneficiary_data_collection: await this.auditBeneficiaryDataCollection(travelRuleData),
        data_validation_results: await this.auditDataValidation(travelRuleData),
        data_enrichment_process: await this.auditDataEnrichment(travelRuleData)
      },

      // Transmission audit
      transmission_process: {
        method_selection: await this.auditTransmissionMethodSelection(transaction),
        transmission_attempts: await this.auditTransmissionAttempts(transaction),
        confirmation_receipt: await this.auditConfirmationReceipt(transaction),
        fallback_procedures: await this.auditFallbackProcedures(transaction)
      },

      // Compliance verification
      compliance_verification: {
        regulatory_requirements_met: await this.auditRegulatoryCompliance(transaction),
        data_retention_compliance: await this.auditDataRetention(transaction),
        privacy_compliance: await this.auditPrivacyCompliance(transaction),
        security_measures: await this.auditSecurityMeasures(transaction)
      },

      // System performance
      system_performance: {
        processing_time: await this.auditProcessingTime(transaction),
        system_availability: await this.auditSystemAvailability(transaction),
        error_handling: await this.auditErrorHandling(transaction),
        monitoring_alerts: await this.auditMonitoringAlerts(transaction)
      }
    };

    // Store audit trail securely
    await this.auditLogger.storeAuditTrail(transaction.id, auditTrail);

    return auditTrail;
  }
}

// Real-time Travel Rule monitoring system
class TravelRuleMonitoringSystem {
  constructor() {
    this.alertManager = new ComplianceAlertManager();
    this.metricsCollector = new RealTimeMetricsCollector();
    this.dashboardGenerator = new ComplianceDashboardGenerator();
  }

  async initializeMonitoring() {
    const monitoringRules = {
      // Real-time transaction monitoring
      transaction_threshold_monitoring: {
        rule: 'monitor_approaching_travel_rule_threshold',
        threshold: 950, // USD - alert before hitting $1000 threshold
        action: 'prepare_travel_rule_data_collection',
        frequency: 'real_time'
      },

      // Data transmission monitoring
      transmission_failure_monitoring: {
        rule: 'monitor_transmission_failures',
        threshold: 0.05, // 5% failure rate
        action: 'escalate_to_compliance_team',
        frequency: 'continuous'
      },

      // Data completeness monitoring
      data_completeness_monitoring: {
        rule: 'monitor_incomplete_travel_rule_data',
        threshold: 0.95, // 95% completeness required
        action: 'trigger_additional_data_collection',
        frequency: 'per_transaction'
      },

      // Regulatory deadline monitoring
      deadline_monitoring: {
        rule: 'monitor_approaching_transmission_deadlines',
        threshold: '2_hours_before_deadline',
        action: 'expedite_transmission_process',
        frequency: 'hourly'
      },

      // Cross-border pattern monitoring
      pattern_monitoring: {
        rule: 'monitor_unusual_cross_border_patterns',
        threshold: 'statistical_anomaly_detection',
        action: 'enhanced_due_diligence_review',
        frequency: 'daily'
      }
    };

    await this.deployMonitoringRules(monitoringRules);
    return monitoringRules;
  }

  async generateRealTimeDashboard() {
    const dashboard = {
      // Current status overview
      current_status: {
        active_travel_rule_transactions: await this.countActiveTravelRuleTransactions(),
        pending_transmissions: await this.countPendingTransmissions(),
        failed_transmissions_today: await this.countFailedTransmissionsToday(),
        compliance_score: await this.calculateCurrentComplianceScore()
      },

      // Real-time metrics
      real_time_metrics: {
        transactions_per_hour: await this.calculateTransactionsPerHour(),
        average_transmission_time: await this.calculateCurrentAverageTransmissionTime(),
        data_completeness_rate: await this.calculateCurrentDataCompletenessRate(),
        system_availability: await this.calculateSystemAvailability()
      },

      // Alert summary
      active_alerts: {
        critical_alerts: await this.getCriticalAlerts(),
        warning_alerts: await this.getWarningAlerts(),
        informational_alerts: await this.getInformationalAlerts(),
        alert_trends: await this.getAlertTrends()
      },

      // Geographic distribution
      geographic_activity: {
        top_destination_countries: await this.getTopDestinationCountries(),
        cross_border_volume_by_corridor: await this.getCrossBorderVolumeByCorridor(),
        regulatory_complexity_by_region: await this.getRegulatoryComplexityByRegion()
      },

      // Performance trends
      trends: {
        compliance_score_trend: await this.getComplianceScoreTrend(),
        transmission_success_trend: await this.getTransmissionSuccessTrend(),
        data_quality_trend: await this.getDataQualityTrend(),
        volume_trend: await this.getVolumeTrend()
      }
    };

    return dashboard;
  }

  async handleComplianceAlert(alert) {
    const alertHandling = {
      alert_classification: this.classifyAlert(alert),
      immediate_actions: await this.determineImmediateActions(alert),
      escalation_required: this.determineEscalationRequirement(alert),
      automated_remediation: await this.attemptAutomatedRemediation(alert),
      manual_intervention: await this.triggerManualIntervention(alert)
    };

    // Execute immediate actions
    for (const action of alertHandling.immediate_actions) {
      await this.executeImmediateAction(action);
    }

    // Escalate if required
    if (alertHandling.escalation_required) {
      await this.escalateAlert(alert, alertHandling);
    }

    // Log alert handling for audit
    await this.logAlertHandling(alert, alertHandling);

    return alertHandling;
  }
}