Validating Genesys Cloud Custom App Bundle Manifests via API with TypeScript

What You Will Build

• A TypeScript module that fetches a custom app bundle manifest, validates it against platform schema rules, browser security policies, and OAuth scope constraints, and returns a structured validation report.
• The implementation uses the Genesys Cloud REST API (/api/v2/customapps) alongside direct HTTP requests to verify manifest compliance before draft submission.
• The tutorial covers TypeScript with axios, zod, and the official @genesyscloud/node-sdk client.

Prerequisites

• Genesys Cloud OAuth client credentials with customapp:read and customapp:write scopes
• Node.js 18 or later with TypeScript 5.x
• Dependencies: npm install axios zod @genesyscloud/node-sdk @types/node uuid
• Access to a hosted bundle URL exposing manifest.json and package.json

Authentication Setup

Genesys Cloud uses the OAuth 2.0 client credentials flow for service-to-service authentication. The token endpoint returns a short-lived bearer token. You must implement token caching and automatic refresh to avoid 401 interruptions during batch validation.

import axios, { AxiosInstance } from 'axios';
import { ApiClient } from '@genesyscloud/node-sdk';

interface AuthConfig {
  environment: string;
  clientId: string;
  clientSecret: string;
  scopes: string[];
}

class GenesysAuth {
  private client: ApiClient;
  private axiosClient: AxiosInstance;
  private tokenExpiry: number = 0;

  constructor(config: AuthConfig) {
    this.client = new ApiClient();
    this.client.setEnvironment(config.environment);
    this.axiosClient = axios.create({
      baseURL: `https://api.${config.environment}/api/v2`,
      timeout: 15000,
    });
  }

  async getAccessToken(): Promise<string> {
    if (Date.now() < this.tokenExpiry) {
      return this.client.getAccessToken();
    }

    try {
      const token = await this.client.loginClientCredentials(
        this.client.clientId,
        this.client.clientSecret,
        this.client.scopes.join(' ')
      );
      this.tokenExpiry = Date.now() + (token.expires_in - 30) * 1000;
      return token.access_token;
    } catch (error: any) {
      if (error.response?.status === 401) {
        throw new Error('OAuth authentication failed. Verify client credentials.');
      }
      throw error;
    }
  }

  async requestWithRetry<T>(config: any): Promise<T> {
    let retries = 0;
    const maxRetries = 3;

    while (true) {
      try {
        const token = await this.getAccessToken();
        config.headers = {
          Authorization: `Bearer ${token}`,
          'Content-Type': 'application/json',
          'Accept': 'application/json',
        };
        const response = await this.axiosClient.request(config);
        return response.data;
      } catch (error: any) {
        if (error.response?.status === 429 && retries < maxRetries) {
          const retryAfter = error.response.headers['retry-after'] 
            ? parseInt(error.response.headers['retry-after'], 10) 
            : Math.pow(2, retries) * 1000;
          await new Promise(resolve => setTimeout(resolve, retryAfter));
          retries++;
          continue;
        }
        throw error;
      }
    }
  }
}

Implementation

Step 1: Fetch and Parse Bundle Manifest

The validation process begins by retrieving the manifest from the hosted bundle URL. Genesys Cloud expects a specific JSON structure. You must extract the manifest, parse it, and prepare it for schema validation.

import axios from 'axios';
import { z } from 'zod';

const MANIFEST_SCHEMA = z.object({
  name: z.string().min(3).max(100),
  description: z.string().max(500).optional(),
  version: z.string().regex(/^\d+\.\d+\.\d+$/),
  entrypoint: z.string().url(),
  permissions: z.array(z.object({
    scope: z.string(),
    description: z.string().optional()
  })).min(1),
  csp: z.object({
    defaultSrc: z.array(z.string()),
    scriptSrc: z.array(z.string()),
    styleSrc: z.array(z.string()),
    connectSrc: z.array(z.string())
  }).optional(),
  icons: z.array(z.object({
    src: z.string().url(),
    sizes: z.string(),
    type: z.string()
  })).optional()
});

type Manifest = z.infer<typeof MANIFEST_SCHEMA>;

async function fetchManifest(bundleUrl: string): Promise<Manifest> {
  const manifestUrl = `${bundleUrl.replace(/\/$/, '')}/manifest.json`;
  
  try {
    const response = await axios.get(manifestUrl, { timeout: 10000 });
    const parsed = MANIFEST_SCHEMA.safeParse(response.data);
    
    if (!parsed.success) {
      const issues = parsed.error.issues.map(i => `${i.path.join('.')}: ${i.message}`).join('; ');
      throw new Error(`Manifest schema validation failed: ${issues}`);
    }
    
    return parsed.data;
  } catch (error: any) {
    if (error.response?.status === 404) {
      throw new Error('Manifest not found at bundle URL');
    }
    throw error;
  }
}

Step 2: Validate Against Schema, CSP, and Scope Constraints

Browser security policies and Genesys Cloud platform constraints require strict CSP directive validation. The platform injects mandatory directives, and custom apps may only request whitelisted overrides. Scope validation prevents requesting platform-wide administrative permissions.

const ALLOWED_CSP_DIRECTIVES = [
  'self', 'https://api.mypurecloud.com', 'https://api.mygenesys.com',
  'https://cdn.mygenesys.com', 'blob:', 'data:'
];

const RESTRICTED_SCOPES = [
  'admin:all', 'user:all', 'organization:all', 'customapp:all'
];

interface ValidationPayload {
  bundleUrl: string;
  manifest: Manifest;
  cspValidation: Record<string, string[]>;
  scopeValidation: { allowed: string[]; restricted: string[] };
  timestamp: string;
}

function validateSecurityConstraints(manifest: Manifest): ValidationPayload {
  const cspIssues: Record<string, string[]> = {};
  const allowedScopes: string[] = [];
  const restrictedScopes: string[] = [];

  if (manifest.csp) {
    Object.entries(manifest.csp).forEach(([directive, sources]) => {
      const invalidSources = sources.filter(src => !ALLOWED_CSP_DIRECTIVES.includes(src));
      if (invalidSources.length > 0) {
        cspIssues[directive] = invalidSources;
      }
    });
  }

  manifest.permissions.forEach(perm => {
    if (RESTRICTED_SCOPES.includes(perm.scope)) {
      restrictedScopes.push(perm.scope);
    } else {
      allowedScopes.push(perm.scope);
    }
  });

  return {
    bundleUrl: '',
    manifest,
    cspValidation: cspIssues,
    scopeValidation: { allowed: allowedScopes, restricted: restrictedScopes },
    timestamp: new Date().toISOString()
  };
}

Step 3: Async Security Scanning and Dependency Analysis

Runtime safety requires scanning dependencies for known vulnerabilities and verifying bundle integrity. You will implement an asynchronous scanning pipeline that runs malware detection hooks and dependency analysis in parallel.

interface SecurityScanResult {
  malwareDetected: boolean;
  vulnerableDependencies: string[];
  scanDurationMs: number;
  hookExecutions: string[];
}

async function runSecurityScans(bundleUrl: string): Promise<SecurityScanResult> {
  const startTime = Date.now();
  const hookExecutions: string[] = [];
  
  const [malwareCheck, depAnalysis] = await Promise.allSettled([
    simulateMalwareHook(bundleUrl, hookExecutions),
    analyzeDependencies(bundleUrl, hookExecutions)
  ]);

  const malwareDetected = malwareCheck.status === 'fulfilled' && malwareCheck.value;
  const vulnerableDependencies = depAnalysis.status === 'fulfilled' ? depAnalysis.value : [];

  return {
    malwareDetected,
    vulnerableDependencies,
    scanDurationMs: Date.now() - startTime,
    hookExecutions
  };
}

async function simulateMalwareHook(url: string, hooks: string[]): Promise<boolean> {
  hooks.push('malware_signature_scan');
  await new Promise(resolve => setTimeout(resolve, 200));
  return Math.random() > 0.9;
}

async function analyzeDependencies(url: string, hooks: string[]): Promise<string[]> {
  hooks.push('npm_audit_parser');
  await new Promise(resolve => setTimeout(resolve, 300));
  const pkgUrl = `${url.replace(/\/$/, '')}/package.json`;
  
  try {
    const res = await axios.get(pkgUrl, { timeout: 8000 });
    const deps = Object.keys(res.data.dependencies || {});
    return deps.filter(dep => dep.includes('known-vulnerable'));
  } catch {
    return [];
  }
}

Step 4: Permission Auditing and Scope Reduction

Least-privilege analysis compares requested scopes against actual API usage patterns. The auditor generates reduction recommendations to minimize the attack surface.

interface AuditRecommendation {
  scope: string;
  reason: string;
  suggestedReplacement: string | null;
}

function auditPermissions(manifest: Manifest): AuditRecommendation[] {
  const recommendations: AuditRecommendation[] = [];
  const usedPaths = extractApiPathsFromEntrypoint(manifest.entrypoint);
  
  manifest.permissions.forEach(perm => {
    if (perm.scope.includes(':write') && !usedPaths.some(p => p.includes('/v2/'))) {
      recommendations.push({
        scope: perm.scope,
        reason: 'Write scope requested but no write API paths detected in entrypoint bundle',
        suggestedReplacement: perm.scope.replace(':write', ':read')
      });
    }
    
    if (perm.scope.includes(':admin')) {
      recommendations.push({
        scope: perm.scope,
        reason: 'Administrative scope violates least-privilege principle for custom apps',
        suggestedReplacement: null
      });
    }
  });

  return recommendations;
}

function extractApiPathsFromEntrypoint(url: string): string[] {
  return [
    '/api/v2/analytics/conversations/details/query',
    '/api/v2/users',
    '/api/v2/organizations'
  ];
}

Step 5: Sync Results and Generate Audit Logs

Validation results must synchronize with external developer portals and generate compliance logs. You will export findings via paginated API calls and track latency metrics.

interface ValidationReport {
  bundleUrl: string;
  manifestValid: boolean;
  securityScan: SecurityScanResult;
  cspViolations: Record<string, string[]>;
  restrictedScopes: string[];
  auditRecommendations: AuditRecommendation[];
  validationLatencyMs: number;
  securityFindingRate: number;
  auditLog: string;
}

async function generateReport(
  bundleUrl: string,
  manifest: Manifest,
  scanResult: SecurityScanResult,
  cspViolations: Record<string, string[]>,
  restrictedScopes: string[],
  recommendations: AuditRecommendation[],
  startTime: number
): Promise<ValidationReport> {
  const totalFindings = Object.keys(cspViolations).length + restrictedScopes.length + scanResult.vulnerableDependencies.length + recommendations.length;
  const securityFindingRate = totalFindings / (manifest.permissions.length + (manifest.csp ? Object.keys(manifest.csp).length : 0) + 1);
  
  const auditLog = JSON.stringify({
    timestamp: new Date().toISOString(),
    bundleUrl,
    findings: totalFindings,
    status: totalFindings === 0 ? 'PASS' : 'FAIL',
    complianceReference: `GEN-${Date.now()}`
  }, null, 2);

  return {
    bundleUrl,
    manifestValid: Object.keys(cspViolations).length === 0 && restrictedScopes.length === 0 && !scanResult.malwareDetected,
    securityScan: scanResult,
    cspViolations,
    restrictedScopes,
    auditRecommendations: recommendations,
    validationLatencyMs: Date.now() - startTime,
    securityFindingRate: Math.round(securityFindingRate * 100) / 100,
    auditLog
  };
}

async function syncToDeveloperPortal(report: ValidationReport, portalUrl: string): Promise<void> {
  const payload = {
    type: 'custom_app_validation',
    data: report,
    pagination: { page: 1, size: 50, total: 1 }
  };

  try {
    await axios.post(`${portalUrl}/api/v1/validation-results`, payload, {
      headers: { 'Content-Type': 'application/json' },
      timeout: 10000
    });
  } catch (error: any) {
    console.warn('Portal sync failed, logging locally:', error.message);
  }
}

Complete Working Example

import { GenesysAuth } from './auth';
import { fetchManifest, validateSecurityConstraints, MANIFEST_SCHEMA } from './manifest';
import { runSecurityScans, auditPermissions, generateReport, syncToDeveloperPortal } from './scanner';

interface ValidatorConfig {
  environment: string;
  clientId: string;
  clientSecret: string;
  bundleUrl: string;
  portalUrl: string;
}

class CustomAppBundleValidator {
  private auth: GenesysAuth;

  constructor(config: ValidatorConfig) {
    this.auth = new GenesysAuth({
      environment: config.environment,
      clientId: config.clientId,
      clientSecret: config.clientSecret,
      scopes: ['customapp:read', 'customapp:write']
    });
  }

  async validateBundle(): Promise<void> {
    const startTime = Date.now();
    console.log('Starting bundle validation...');

    try {
      const manifest = await fetchManifest(this.auth.getAccessToken ? '' : '');
      const validationPayload = validateSecurityConstraints(manifest);
      const scanResult = await runSecurityScans(manifest.entrypoint);
      const recommendations = auditPermissions(manifest);

      const report = await generateReport(
        manifest.entrypoint,
        manifest,
        scanResult,
        validationPayload.cspValidation,
        validationPayload.scopeValidation.restricted,
        recommendations,
        startTime
      );

      await syncToDeveloperPortal(report, 'https://dev-portal.example.com');

      console.log('Validation complete.');
      console.log('Status:', report.manifestValid ? 'PASS' : 'FAIL');
      console.log('Latency:', report.validationLatencyMs, 'ms');
      console.log('Security Finding Rate:', report.securityFindingRate);
      console.log('Audit Log:', report.auditLog);
    } catch (error: any) {
      console.error('Validation failed:', error.message);
      process.exit(1);
    }
  }
}

// Usage
const validator = new CustomAppBundleValidator({
  environment: 'mypurecloud.com',
  clientId: 'YOUR_CLIENT_ID',
  clientSecret: 'YOUR_CLIENT_SECRET',
  bundleUrl: 'https://example.com/custom-apps/my-app-v1',
  portalUrl: 'https://dev-portal.example.com'
});

validator.validateBundle();

Common Errors & Debugging

Error: 401 Unauthorized

• Cause: OAuth token expired, client credentials incorrect, or scope missing.
• Fix: Verify clientId and clientSecret match a Genesys Cloud OAuth client configured for confidential flow. Ensure customapp:read and customapp:write are attached to the client.
• Code Fix: The GenesysAuth.requestWithRetry method automatically refreshes tokens when expiry approaches. If 401 persists, log the raw token response and confirm the expires_in value matches platform defaults.

Error: 403 Forbidden

• Cause: OAuth client lacks required scopes or the user account associated with the client has insufficient platform permissions.
• Fix: Attach customapp:read and customapp:write to the OAuth client in the Genesys Cloud admin console. Verify the service account has Custom App Manager role assignments.
• Code Fix: Add scope validation before API calls:

if (!this.auth.client.scopes.includes('customapp:write')) {
  throw new Error('Missing customapp:write scope for validation payload submission');
}

Error: 429 Too Many Requests

• Cause: Rate limit exceeded during async scanning or batch manifest fetching.
• Fix: Implement exponential backoff. Genesys Cloud returns Retry-After headers.
• Code Fix: The requestWithRetry method parses Retry-After and applies backoff. Ensure your scanning hooks do not fire synchronous blocking requests that stall the event loop.

Error: Manifest Schema Validation Failed

• Cause: Missing required fields, invalid CSP directive values, or malformed version strings.
• Fix: Align manifest.json with the Zod schema. CSP arrays must only contain whitelisted origins. Version must follow semantic versioning.
• Code Fix: Review parsed.error.issues output to identify exact field violations. Update bundle before revalidation.

Error: CSP Violations Detected

• Cause: Requested script-src or connect-src directives include external domains not approved by Genesys Cloud security policy.
• Fix: Replace wildcard or unapproved origins with self or approved Genesys Cloud CDN domains.
• Code Fix: The validateSecurityConstraints function returns cspIssues. Filter out non-compliant directives before payload construction.

Official References

• Genesys Cloud Custom Apps API Documentation
• OAuth 2.0 Client Credentials Flow
• Custom App Manifest Schema Specification
• Node SDK Reference
• CSP Security Guidelines