Practical Applications of Hooks

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Fraud detection & risk assessment

• Type: PRE_TRANSACTION
• Scenario:
  • Before approving a transaction, a pre-transaction hook triggers an external fraud detection system.
  • The fraud detection system analyzes transaction patterns and generates a risk score.
  • If the risk score exceeds a predetermined threshold, the transaction is either flagged for manual review or automatically rejected.
• Benefit: This process minimizes fraudulent transactions while ensuring legitimate transactions are unaffected.

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Customer due diligence & KYC checks

• Type: PRE_TRANSACTION
• Scenario:
  • When a high-value transaction is initiated, a pre-transaction hook activates an external identity verification system.
  • The system provides verification details, such as KYC compliance status and risk category.
  • If the user is not verified, the transaction is halted, and a manual review is initiated.
• Benefit: This ensures regulatory compliance and prevents fraudulent transactions.

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Dynamic transaction enrichment

• Type: PRE_TRANSACTION
• Scenario:
  • A pre-transaction hook retrieves additional metadata for a transaction before it is processed.
  • For example, it enhances payment transactions with geolocation data or customer segmentation tags.
  • This can be achieved by calling a metadata enrichment endpoint, such as:
    Copy

    curl -X POST YOUR_BLNK_INSTANCE_URL/<id>/metadata \
    -H "Content-Type: application/json" \
    -d '{
      "meta_data": {
        "last_name": "Brooks",
        "verification_status": "Pending"
      }
    }'
    

• Benefit: Enhances transaction data without altering the core system logic.

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Loyalty points & rewards processing

• Type: POST_TRANSACTION
• Scenario:
  • After a successful transaction, a post-transaction hook triggers a loyalty system to award reward points.
  • The system updates the user’s loyalty points based on the transaction value.
  • If the user reaches a milestone, an automated reward is triggered.
• Benefit: Ensures financial accuracy and prevents mismatches.

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Real-time reconciliation & settlement

• Type: POST_TRANSACTION
• Scenario:
  • A post-transaction hook sends transaction details to an external reconciliation service.
  • The system cross-checks balances, payments, and pending transactions.
  • Any discrepancies trigger alerts for manual intervention.
• Benefit: Ensures financial accuracy and prevents mismatches.

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