Estimate transfer fees

curl --request POST \
  --url https://api.sandbox.hit-pay.com/v1/transfers/estimate \
  --header 'Content-Type: application/json' \
  --header 'X-BUSINESS-API-KEY: <x-business-api-key>' \
  --data '{
  "beneficiary_id": "9e3320ed-a47b-495b-8e60-e1b1347eb3e8",
  "source_currency": "sgd",
  "source_amount": 100
}'

{
  "source_amount": 100,
  "source_amount_fees": 0,
  "source_currency": "sgd",
  "exchange_rate": "1",
  "fx_pair": "sgdsgd",
  "payment_amount": 100,
  "payment_amount_fees": 0,
  "payment_currency": "sgd",
  "fee_payer": "beneficiary",
  "fee_currency": "sgd"
}