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Razorpay INVALID_SIGNATURE_ERROR encountered during payment processing.

The signature verification failed, indicating a mismatch between the expected and received signatures.

Understanding Razorpay: A Comprehensive Payment Gateway

Razorpay is a leading payment gateway solution that enables businesses to accept, process, and disburse payments with ease. It offers a suite of products that allow businesses to handle payments across various channels, ensuring seamless transactions for both merchants and customers.

Identifying the Symptom: INVALID_SIGNATURE_ERROR

When integrating Razorpay into your application, you might encounter the INVALID_SIGNATURE_ERROR. This error typically manifests during the payment processing phase, indicating a problem with the signature verification process.

What You Observe

Upon attempting to process a payment, the application throws an INVALID_SIGNATURE_ERROR. This error suggests that the signature generated by your application does not match the one expected by Razorpay.

Delving into the Issue: Signature Verification

The INVALID_SIGNATURE_ERROR is triggered when there is a discrepancy between the signature generated by your application and the one Razorpay expects. This mismatch can occur due to incorrect signature generation logic or discrepancies in the data used for signature creation.

Understanding Signature Generation

Razorpay uses HMAC SHA256 for signature generation. The signature is a hash of the order ID and payment ID, created using a secret key. This ensures that the data has not been tampered with during transmission.

Steps to Resolve the INVALID_SIGNATURE_ERROR

To resolve this issue, follow these actionable steps:

1. Verify Signature Generation Logic

Ensure that your signature generation logic aligns with Razorpay's documentation. The signature should be generated using the following format:

const crypto = require('crypto');
const generated_signature = crypto.createHmac('sha256', secret)
.update(order_id + '|' + payment_id)
.digest('hex');

Refer to the Razorpay documentation for more details.

2. Check Data Consistency

Ensure that the order_id and payment_id used in the signature generation are consistent with those received from Razorpay's response.

3. Validate Secret Key

Confirm that the secret key used in the HMAC SHA256 function is correct and matches the one provided in your Razorpay account settings.

Additional Resources

For further assistance, consider exploring the following resources:

By following these steps, you should be able to resolve the INVALID_SIGNATURE_ERROR and ensure smooth payment processing in your application.

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