curl --request POST \
  --url https://sandbox.payfi.global/v1/operations/{operationId}/documents \
  --header 'Content-Type: application/json' \
  --header 'Idempotency-Key: <api-key>' \
  --header 'X-PayFi-Api-Key: <api-key>' \
  --header 'X-PayFi-Nonce: <api-key>' \
  --header 'X-PayFi-Signature: <api-key>' \
  --data '
{
  "documentType": "invoice",
  "fileName": "invoice-123.pdf",
  "contentType": "application/pdf",
  "sizeBytes": 123456
}
'

import requests

url = "https://sandbox.payfi.global/v1/operations/{operationId}/documents"

payload = {
    "documentType": "invoice",
    "fileName": "invoice-123.pdf",
    "contentType": "application/pdf",
    "sizeBytes": 123456
}
headers = {
    "X-PayFi-Api-Key": "<api-key>",
    "X-PayFi-Nonce": "<api-key>",
    "X-PayFi-Signature": "<api-key>",
    "Idempotency-Key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'X-PayFi-Api-Key': '<api-key>',
    'X-PayFi-Nonce': '<api-key>',
    'X-PayFi-Signature': '<api-key>',
    'Idempotency-Key': '<api-key>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    documentType: 'invoice',
    fileName: 'invoice-123.pdf',
    contentType: 'application/pdf',
    sizeBytes: 123456
  })
};

fetch('https://sandbox.payfi.global/v1/operations/{operationId}/documents', 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://sandbox.payfi.global/v1/operations/{operationId}/documents",
  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([
    'documentType' => 'invoice',
    'fileName' => 'invoice-123.pdf',
    'contentType' => 'application/pdf',
    'sizeBytes' => 123456
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "Idempotency-Key: <api-key>",
    "X-PayFi-Api-Key: <api-key>",
    "X-PayFi-Nonce: <api-key>",
    "X-PayFi-Signature: <api-key>"
  ],
]);

$response = curl_exec($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://sandbox.payfi.global/v1/operations/{operationId}/documents"

	payload := strings.NewReader("{\n  \"documentType\": \"invoice\",\n  \"fileName\": \"invoice-123.pdf\",\n  \"contentType\": \"application/pdf\",\n  \"sizeBytes\": 123456\n}")

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

	req.Header.Add("X-PayFi-Api-Key", "<api-key>")
	req.Header.Add("X-PayFi-Nonce", "<api-key>")
	req.Header.Add("X-PayFi-Signature", "<api-key>")
	req.Header.Add("Idempotency-Key", "<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://sandbox.payfi.global/v1/operations/{operationId}/documents")
  .header("X-PayFi-Api-Key", "<api-key>")
  .header("X-PayFi-Nonce", "<api-key>")
  .header("X-PayFi-Signature", "<api-key>")
  .header("Idempotency-Key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"documentType\": \"invoice\",\n  \"fileName\": \"invoice-123.pdf\",\n  \"contentType\": \"application/pdf\",\n  \"sizeBytes\": 123456\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://sandbox.payfi.global/v1/operations/{operationId}/documents")

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

request = Net::HTTP::Post.new(url)
request["X-PayFi-Api-Key"] = '<api-key>'
request["X-PayFi-Nonce"] = '<api-key>'
request["X-PayFi-Signature"] = '<api-key>'
request["Idempotency-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"documentType\": \"invoice\",\n  \"fileName\": \"invoice-123.pdf\",\n  \"contentType\": \"application/pdf\",\n  \"sizeBytes\": 123456\n}"

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

{
  "documentId": "doc_example",
  "status": "UPLOAD_PENDING",
  "uploadUrl": "https://storage.example.com/presigned-upload",
  "uploadUrlExpiresInSeconds": 300
}

{
  "error": {
    "code": "INVALID_REQUEST",
    "message": "The request payload is invalid."
  }
}

{
  "error": {
    "code": "UNAUTHORIZED",
    "message": "Authentication failed."
  }
}