Refund API throwing error

Steps to reproduce the behavior

await razorpay.payments.refund(payment_id, {
        amount: 150000,
        speed: "normal",
        notes: {
            appointment_id,
            user_fhir_id,
            reason
        }
});

Error I am getting is :

 {
  statusCode: 400,
  error: {
  code: 'BAD_REQUEST_ERROR',
   description: 'invalid request sent',
  metadata: {},
   reason: 'NA',
    source: 'NA',
   step: 'NA'
} }

Expected behavior

• This API should execute the refund , without throwing any error

Actual behavior

• Throwing error

Code snippets

Node version

v22.14.0

Library version

^2.9.6

Additional Information

No response

Start at the payments.refund entry point and reproduce the request using Node v22.14.0 and library version ^2.9.6. Check the refund API requirements for payment_id, amount, speed, and notes; done when the same request executes without the reported 400 BAD_REQUEST_ERROR.