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UPI (Unified Payments Interface) has revolutionized digital payments in India, enabling seamless transactions across banks and payment apps. This article delves into the technical workings of UPI, explaining the flow of transactions and the roles of various entities involved.
You Should Know:
1. Understanding UPI Handles and VPAs
- UPI uses Virtual Payment Addresses (VPAs) like `mahesh@hdfc` to simplify transactions.
- VPAs are linked to bank accounts and IFSC codes, eliminating the need to share sensitive bank details.
Command to Check UPI Transaction Status (Linux):
upi_status_check() {
echo "Enter UPI Transaction ID:"
read transaction_id
echo "Checking status for Transaction ID: $transaction_id"
<h1>Simulate API call to check status</h1>
curl -X GET "https://api.upi.com/status/$transaction_id"
}
upi_status_check
2. Role of NPCI in UPI Transactions
- NPCI (National Payments Corporation of India) acts as a trusted switch, routing transaction data securely between banks and payment apps.
- It ensures interoperability and standardization across the UPI ecosystem.
Python Script to Simulate UPI Transaction Flow:
import requests
def initiate_upi_transaction(sender_vpa, receiver_vpa, amount):
payload = {
"sender_vpa": sender_vpa,
"receiver_vpa": receiver_vpa,
"amount": amount
}
response = requests.post("https://api.upi.com/initiate", json=payload)
return response.json()
<h1>Example usage</h1>
transaction = initiate_upi_transaction("ganesh@hdfc", "mahesh@axis", 100)
print(transaction)
3. Authentication and Encryption in UPI
- Payment apps like PhonePe handle authentication and encryption before forwarding transaction requests to NPCI.
- Banks validate the sender’s PIN and account balance before debiting funds.
Linux Command to Encrypt UPI Data:
echo "UPI Transaction Data" | openssl enc -aes-256-cbc -salt -pass pass:YourSecurePassword
4. Settlement Process
- NPCI creates bulk settlement files for banks, which compute net amounts owed to each other.
- The final settlement is completed via the Reserve Bank of India (RBI).
Bash Script to Simulate Settlement:
#!/bin/bash echo "Generating settlement file for NPCI..." touch settlement_file.txt echo "Bank A owes Bank B: ₹1000" >> settlement_file.txt echo "Settlement file created."
What Undercode Say:
UPI’s design is a testament to the power of public infrastructure enabling private innovation. By understanding the technical flow of UPI transactions, developers and IT professionals can build secure and efficient payment solutions. For further reading, check out NPCI’s Official UPI Documentation.
Additional Linux Commands for UPI Developers:
- Monitor UPI API logs:
tail -f /var/log/upi_api.log
- Check network connectivity for UPI servers:
ping api.upi.com
- Test UPI API endpoints:
curl -X GET "https://api.upi.com/health"
This article provides a comprehensive overview of UPI’s technical workings, complete with practical code snippets and commands for developers.
References:
Reported By: Maheshma Upi – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
