curl --request POST \
  --url https://gateway.varchev.com/wallet/{walletId}/asset/{assetId}/operation/{operationId}/fee \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'tenantId: <tenantid>' \
  --data '
{
  "paidBy": "source",
  "feeSharing": {
    "destination": [
      null,
      null
    ]
  },
  "appliedTo": "base",
  "feeApi": "feeApi",
  "feeValue": {
    "balanceType": "current",
    "name": "name",
    "instanceRef": {
      "refferTo": ""
    },
    "value": "value"
  },
  "type": "fixed",
  "group": 5.637376656633329,
  "order": 2.3021358869347655
}
'

import requests

url = "https://gateway.varchev.com/wallet/{walletId}/asset/{assetId}/operation/{operationId}/fee"

payload = {
    "paidBy": "source",
    "feeSharing": { "destination": [None, None] },
    "appliedTo": "base",
    "feeApi": "feeApi",
    "feeValue": {
        "balanceType": "current",
        "name": "name",
        "instanceRef": { "refferTo": "" },
        "value": "value"
    },
    "type": "fixed",
    "group": 5.637376656633329,
    "order": 2.3021358869347655
}
headers = {
    "tenantId": "<tenantid>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    tenantId: '<tenantid>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    paidBy: 'source',
    feeSharing: {destination: [null, null]},
    appliedTo: 'base',
    feeApi: 'feeApi',
    feeValue: {
      balanceType: 'current',
      name: 'name',
      instanceRef: {refferTo: ''},
      value: 'value'
    },
    type: 'fixed',
    group: 5.637376656633329,
    order: 2.3021358869347655
  })
};

fetch('https://gateway.varchev.com/wallet/{walletId}/asset/{assetId}/operation/{operationId}/fee', 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://gateway.varchev.com/wallet/{walletId}/asset/{assetId}/operation/{operationId}/fee",
  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([
    'paidBy' => 'source',
    'feeSharing' => [
        'destination' => [
                null,
                null
        ]
    ],
    'appliedTo' => 'base',
    'feeApi' => 'feeApi',
    'feeValue' => [
        'balanceType' => 'current',
        'name' => 'name',
        'instanceRef' => [
                'refferTo' => ''
        ],
        'value' => 'value'
    ],
    'type' => 'fixed',
    'group' => 5.637376656633329,
    'order' => 2.3021358869347655
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json",
    "tenantId: <tenantid>"
  ],
]);

$response = curl_exec($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://gateway.varchev.com/wallet/{walletId}/asset/{assetId}/operation/{operationId}/fee"

	payload := strings.NewReader("{\n  \"paidBy\": \"source\",\n  \"feeSharing\": {\n    \"destination\": [\n      null,\n      null\n    ]\n  },\n  \"appliedTo\": \"base\",\n  \"feeApi\": \"feeApi\",\n  \"feeValue\": {\n    \"balanceType\": \"current\",\n    \"name\": \"name\",\n    \"instanceRef\": {\n      \"refferTo\": \"\"\n    },\n    \"value\": \"value\"\n  },\n  \"type\": \"fixed\",\n  \"group\": 5.637376656633329,\n  \"order\": 2.3021358869347655\n}")

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

	req.Header.Add("tenantId", "<tenantid>")
	req.Header.Add("Authorization", "Bearer <token>")
	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://gateway.varchev.com/wallet/{walletId}/asset/{assetId}/operation/{operationId}/fee")
  .header("tenantId", "<tenantid>")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"paidBy\": \"source\",\n  \"feeSharing\": {\n    \"destination\": [\n      null,\n      null\n    ]\n  },\n  \"appliedTo\": \"base\",\n  \"feeApi\": \"feeApi\",\n  \"feeValue\": {\n    \"balanceType\": \"current\",\n    \"name\": \"name\",\n    \"instanceRef\": {\n      \"refferTo\": \"\"\n    },\n    \"value\": \"value\"\n  },\n  \"type\": \"fixed\",\n  \"group\": 5.637376656633329,\n  \"order\": 2.3021358869347655\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://gateway.varchev.com/wallet/{walletId}/asset/{assetId}/operation/{operationId}/fee")

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

request = Net::HTTP::Post.new(url)
request["tenantId"] = '<tenantid>'
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"paidBy\": \"source\",\n  \"feeSharing\": {\n    \"destination\": [\n      null,\n      null\n    ]\n  },\n  \"appliedTo\": \"base\",\n  \"feeApi\": \"feeApi\",\n  \"feeValue\": {\n    \"balanceType\": \"current\",\n    \"name\": \"name\",\n    \"instanceRef\": {\n      \"refferTo\": \"\"\n    },\n    \"value\": \"value\"\n  },\n  \"type\": \"fixed\",\n  \"group\": 5.637376656633329,\n  \"order\": 2.3021358869347655\n}"

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

{
  "walletId": "walletId",
  "assetId": "assetId",
  "oprationFee": {
    "paidBy": "source",
    "feeSharing": {
      "destination": [
        null,
        null
      ]
    },
    "appliedTo": "base",
    "feeApi": "feeApi",
    "feeValue": {
      "balanceType": "current",
      "name": "name",
      "instanceRef": {
        "refferTo": ""
      },
      "value": "value"
    },
    "type": "fixed",
    "group": 5.637376656633329,
    "order": 2.3021358869347655
  },
  "tenantId": "tenantId"
}

{
  "httpCode": 123,
  "internalCode": 123,
  "internalType": "<string>",
  "severity": "<string>",
  "description": "<string>"
}