Razorpay Signature Verification Failed in python - python-3.7

Question

I am verifying the payment status done using the razorpay payment links using a webhook. I have added the webhook to the RazorPay webhook section with payment_links as the active elements. I am getting a payment completed indication while using the payment link. But the webhook is throwing this error.
This is how I am verifying the signature
webhook_secret = "abc"
webhook_signature = request.headers['X-Razorpay-Signature']
client = razorpay.Client(auth=("xyz", "pqr"))
payload_body = json.dumps(request.json, separators=(',', ':'))
verify = client.utility.verify_webhook_signature(payload_body, webhook_signature, webhook_secret)
print(verify)
Also tried it with
payload_body = json.dumps(request.data, separators=(',', ':'))
But I keep getting the error,
razorpay.errors.SignatureVerificationError: Razorpay Signature Verification Failed
I tried like this
verify = client.utility.verify_webhook_signature(request.data.decode('utf-8'), webhook_signature, webhook_secret)
print(verify)
The output is None
Edited
I have tried the below methods but none of them work
1) verify = client.utility.verify_webhook_signature(json.dumps(request.data, separators=(',', ':')), webhook_signature, webhook_secret)
print("verification of signature {}".format(verify))
Resulted in TypeError: Object of type bytes is not JSON serializable.
2) verify = client.utility.verify_webhook_signature(json.dumps(request.json, separators=(',', ':')), webhook_signature, webhook_secret)
print("verification of signature {}".format(verify))
#razorpay.errors.SignatureVerificationError: Razorpay Signature Verification Failed
3) verify = client.utility.verify_webhook_signature(json.dumps(body, separators=(',', ':')), webhook_signature, webhook_secret)
print("verification of signature {}".format(verify))
2 and 3 resulted in razorpay.errors.SignatureVerificationError: Razorpay Signature Verification Failed

Answer 1

If your are using Django the use request.body instead of request.json to get raw body and send it to verify_webhook_signature method after decoding. Here is the example code -
def verify_payment(request):
payload_body = request.body.decode()
webhook_secret = "abc"
webhook_signature = request.headers['X-Razorpay-Signature']
client = razorpay.Client(auth=("xyz", "pqr"))
verify = client.utility.verify_webhook_signature(payload_body,
webhook_signature, webhook_secret)
print(verify)
You have to decode the body before verifying because of this issue https://github.com/razorpay/razorpay-python/issues/121 otherwise it will raise a TypeError.
And If you are using Flask the use request.data instead of request.json and other steps are same.

Answer 2

If you are using django with rest_framework, request.data will give a dict and don't do json.dumps(response.data).Instead use response.body.decode() and pass it to verify_webhook_signature.it will work.
Reference - https://github.com/razorpay/razorpay-python/issues/65#issuecomment-485752662