Step 2: Create NFT Order

const axios = require('axios').default;

function generateHmac(data, nonce) {
    ...
 }
 
function sendPostRequest(query, payload) {
    const hostname = 'api.banxa-sandbox.com';
    const nonce = Date.now();
    let data = "POST\n" + query + "\n" + nonce + "\n" + payload;

    const authHeader = generateHmac(data, nonce);
    axios.post({
        method: "post",
        url: hostname + query,
        data: payload,
        headers: {
            'Authorization': 'Bearer ' + authHeader,
            'Content-Type': 'application/json'
        }
    }).then((response) => {
        console.log(response);
    }).catch((error) => {
        console.error(error);
    })
}

sendPostRequest('/api/orders/nft/buy', '{"account_reference": "testxxxx-1", "source": "USD", "source_amount": "150", "target": "ETH", "blockchain": "ERC20", "return_url_on_success": "http://test.com", "wallet_address": "{VALID_WALLET_ADDRESS}", "meta_data": { "purchase_reference": "XXX", "nft": {"contract_address: "0x0000000000", "token_id": "1", "name": "Banxa nft", "collection": "Banxa NFT shop", "media": { "type": "image", "link": "https://ipfs.example.cloud/ipfs/QmTWyo67Vd4GNVkbBCs96ddXnZZEJy41Cjc9DkcQRt41Np"}}}}')

import requests
import time
import hmac

url = 'https://[PARTNER-NAME].banxa-sandbox.com'

def generateHmac(payload, nonce):
    ...
    
def sendPostRequest(query, payload):
    nonce = int(time.time())

    data = 'POST\n' + query + '\n' + str(nonce) + '\n' + payload

    authHeader = generateHmac(data, nonce)

    response = requests.post(url + query,
        data = payload,
        headers = {
                'Authorization': 'Bearer ' + authHeader,
                'Content-Type': 'application/json'
        })

    print(response.content)

sendPostRequest('/api/orders', '{"account_reference":"test01","source":"USD","target":"BTC","source_amount":"100","return_url_on_success":"test.com","wallet_address":"[VALID_WALLET_ADDRESS]"}')

package com.banxa;

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.time.Duration;
import java.util.Formatter;

public class BanxaService {
    private static final String BANXA_URL = "https://api.banxa-sandbox.com";

    public static void main(String[] args) throws Exception {
        BanxaService banxaService = new BanxaService();

        banxaService.sendPostRequest("/api/orders", "{" +
                "\"account_reference\":\"test01\"," +
                "\"source\":\"USD\"," +
                "\"target\":\"BTC\"," +
                "\"source_amount\":\"100\"," +
                "\"return_url_on_success\":\"test.com\"," +
                "\"wallet_address\":\"[VALID_WALLET_ADDRESS]\""+
                "}");
    }

    private void sendPostRequest(String query, String payload) throws Exception {
        String hmac = getHmac("POST", query, payload);

        HttpClient httpClient = HttpClient.newHttpClient();
        HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create(BANXA_URL + query))
                .timeout(Duration.ofSeconds(10))
                .header("Authorization", "Bearer " + hmac)
                .header("content-type", "application/json")
                .POST(HttpRequest.BodyPublishers.ofString(payload))
                .build();

        HttpResponse<String> response = httpClient.send(request, HttpResponse.BodyHandlers.ofString());

        if (response.statusCode() == 200) {
            System.out.println("OK");
        } else {
            System.out.println("Failed: " + response.statusCode());
        }
    }

    public String getHmac(String method, String query, String payload) throws Exception {
        ...
    }
}