Check whether the requested funds amount is available on the VRP consent.

Note that you should not call this before each VRP payment submission because we do it for you.

Required feature: VARIABLE_RECURRING_PAYMENT_FUNDS_CONFIRMATION

{
  "paymentAmount": {
    "amount": 10,
    "currency": "GBP"
  }
}

{
  "data": {
    "reference": "Own Account Sweeping",
    "paymentAmount": {
      "amount": 10,
      "currency": "GBP"
    }
  }
}