curl --request POST \
  --url https://api.meetcampfire.com/coa/api/v1/invoice/{invoice_id}/calculate-payment \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "transactions": [
    {
      "transaction_id": 123,
      "amount": 0,
      "posted_at": "2023-12-25",
      "withholding_amount": 500000000000000000
    }
  ],
  "credit_memos": [
    {
      "credit_memo_id": 123,
      "amount": 0,
      "posted_at": "2023-12-25"
    }
  ],
  "empty_transactions": [
    {
      "amount": 0,
      "payment_date": "2023-12-25",
      "withholding_amount": 500000000000000000
    }
  ]
}
'

import requests

url = "https://api.meetcampfire.com/coa/api/v1/invoice/{invoice_id}/calculate-payment"

payload = {
    "transactions": [
        {
            "transaction_id": 123,
            "amount": 0,
            "posted_at": "2023-12-25",
            "withholding_amount": 500000000000000000
        }
    ],
    "credit_memos": [
        {
            "credit_memo_id": 123,
            "amount": 0,
            "posted_at": "2023-12-25"
        }
    ],
    "empty_transactions": [
        {
            "amount": 0,
            "payment_date": "2023-12-25",
            "withholding_amount": 500000000000000000
        }
    ]
}
headers = {
    "Authorization": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    transactions: [
      {
        transaction_id: 123,
        amount: 0,
        posted_at: '2023-12-25',
        withholding_amount: 500000000000000000
      }
    ],
    credit_memos: [{credit_memo_id: 123, amount: 0, posted_at: '2023-12-25'}],
    empty_transactions: [
      {amount: 0, payment_date: '2023-12-25', withholding_amount: 500000000000000000}
    ]
  })
};

fetch('https://api.meetcampfire.com/coa/api/v1/invoice/{invoice_id}/calculate-payment', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.meetcampfire.com/coa/api/v1/invoice/{invoice_id}/calculate-payment",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'transactions' => [
        [
                'transaction_id' => 123,
                'amount' => 0,
                'posted_at' => '2023-12-25',
                'withholding_amount' => 500000000000000000
        ]
    ],
    'credit_memos' => [
        [
                'credit_memo_id' => 123,
                'amount' => 0,
                'posted_at' => '2023-12-25'
        ]
    ],
    'empty_transactions' => [
        [
                'amount' => 0,
                'payment_date' => '2023-12-25',
                'withholding_amount' => 500000000000000000
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: <api-key>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.meetcampfire.com/coa/api/v1/invoice/{invoice_id}/calculate-payment"

	payload := strings.NewReader("{\n  \"transactions\": [\n    {\n      \"transaction_id\": 123,\n      \"amount\": 0,\n      \"posted_at\": \"2023-12-25\",\n      \"withholding_amount\": 500000000000000000\n    }\n  ],\n  \"credit_memos\": [\n    {\n      \"credit_memo_id\": 123,\n      \"amount\": 0,\n      \"posted_at\": \"2023-12-25\"\n    }\n  ],\n  \"empty_transactions\": [\n    {\n      \"amount\": 0,\n      \"payment_date\": \"2023-12-25\",\n      \"withholding_amount\": 500000000000000000\n    }\n  ]\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.meetcampfire.com/coa/api/v1/invoice/{invoice_id}/calculate-payment")
  .header("Authorization", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"transactions\": [\n    {\n      \"transaction_id\": 123,\n      \"amount\": 0,\n      \"posted_at\": \"2023-12-25\",\n      \"withholding_amount\": 500000000000000000\n    }\n  ],\n  \"credit_memos\": [\n    {\n      \"credit_memo_id\": 123,\n      \"amount\": 0,\n      \"posted_at\": \"2023-12-25\"\n    }\n  ],\n  \"empty_transactions\": [\n    {\n      \"amount\": 0,\n      \"payment_date\": \"2023-12-25\",\n      \"withholding_amount\": 500000000000000000\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.meetcampfire.com/coa/api/v1/invoice/{invoice_id}/calculate-payment")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"transactions\": [\n    {\n      \"transaction_id\": 123,\n      \"amount\": 0,\n      \"posted_at\": \"2023-12-25\",\n      \"withholding_amount\": 500000000000000000\n    }\n  ],\n  \"credit_memos\": [\n    {\n      \"credit_memo_id\": 123,\n      \"amount\": 0,\n      \"posted_at\": \"2023-12-25\"\n    }\n  ],\n  \"empty_transactions\": [\n    {\n      \"amount\": 0,\n      \"payment_date\": \"2023-12-25\",\n      \"withholding_amount\": 500000000000000000\n    }\n  ]\n}"

response = http.request(request)
puts response.read_body

{
  "total_due": 0,
  "applied_payments": 0,
  "applied_credits": 0,
  "applied_withholding": 0,
  "term_discounts": 0,
  "remaining_due": 0
}

{}

{}