Problem Faced:

• Regulatory Compliance: Financial authorities mandate identity verification.
• Fraud Prevention: Exchanges must filter out fake users.
• Onboarding Delays: KYC verification causes friction in user sign-ups.

Solution:

• Automate Document Verification: Integrate AI-based KYC providers like Sumsub, Onfido, or Jumio.
• Face Recognition: Use liveness detection to prevent deepfake attacks.
• AML (Anti-Money Laundering) Checks: Cross-check user identities against watchlists.

Sumsub API Integration in Node.js:
javascript

const axios = require('axios');

async function verifyUser(userId, document) {
    const response = await axios.post('https://api.sumsub.com/applicants', {
        applicant: {
            externalUserId: userId,
            email: 'user@example.com',
        },
        document: document,
    }, {
        headers: {
            'X-App-Token': 'YOUR_SUMSUB_API_KEY',
            'Content-Type': 'application/json'
        }
    });

    return response.data;
}

// Usage
verifyUser('user123', { type: 'passport', file: 'passport.jpg' })
    .then(data => console.log('KYC Verification:', data))
    .catch(err => console.error(err));

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