curl --request POST \
  --url https://sandbox-api.sakawave.example/v1/transfers/preview \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "sourceAccountId": "01K2Z3AB4D5E6F7G8H9JKMNPQR",
  "destinationId": "01K2Z3AB4F5G6H7J8KMNPQRSTV",
  "sourceCurrency": "NGN",
  "destinationCurrency": "NGN",
  "amountSide": "source",
  "sourceAmount": "2500000"
}
'

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    sourceAccountId: '01K2Z3AB4D5E6F7G8H9JKMNPQR',
    destinationId: '01K2Z3AB4F5G6H7J8KMNPQRSTV',
    sourceCurrency: 'NGN',
    destinationCurrency: 'NGN',
    amountSide: 'source',
    sourceAmount: '2500000'
  })
};

fetch('https://sandbox-api.sakawave.example/v1/transfers/preview', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://sandbox-api.sakawave.example/v1/transfers/preview"

payload = {
    "sourceAccountId": "01K2Z3AB4D5E6F7G8H9JKMNPQR",
    "destinationId": "01K2Z3AB4F5G6H7J8KMNPQRSTV",
    "sourceCurrency": "NGN",
    "destinationCurrency": "NGN",
    "amountSide": "source",
    "sourceAmount": "2500000"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

{
  "sourceCurrency": "NGN",
  "destinationCurrency": "NGN",
  "sourceAmount": "25000.00",
  "destinationAmount": "25000.00",
  "fee": "50.00",
  "totalDebit": "25050.00",
  "routeId": null,
  "scheme": "internal",
  "fxQuoteId": null,
  "quoteExpiresAt": null
}

{
  "statusCode": 400,
  "message": "Must be a valid identifier.",
  "code": "validation_failed",
  "errors": [
    {
      "message": "Must be a valid identifier.",
      "field": "accountId",
      "code": "custom",
      "path": [
        "accountId"
      ]
    }
  ]
}

{
  "statusCode": 401,
  "code": "INVALID_API_KEY",
  "message": "Invalid or inactive API credentials."
}

{
  "statusCode": 404,
  "code": "resource_not_found",
  "message": "Resource not found."
}

{
  "statusCode": 409,
  "code": "resource_conflict",
  "message": "The request conflicts with the current resource state."
}

{
  "statusCode": 429,
  "message": "Too many API requests. Try again later.",
  "code": "api_key_rate_limit_exceeded",
  "retryAfterSeconds": 17
}

{
  "statusCode": 500,
  "code": "internal_server_error",
  "message": "An unexpected error occurred."
}