Flutterwave BVN API介绍 - Java

Flutterwave提供了一个基于RESTful的API，用于检索和验证BVN（银行验证号码）信息。本文将介绍如何在Java中使用Flutterwave BVN API。

步骤1：获取API密钥

在使用Flutterwave BVN API之前，您需要申请API密钥。请参阅Flutterwave API文档以了解如何获取API密钥。

步骤2：发送API请求

要检索和验证BVN信息，请执行以下步骤：

1. 导入必要的库

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Hex;
import org.apache.commons.lang.StringUtils;

2. 创建一个函数来发送API请求

public static void sendBVNRequest(String apiKey, String secretKey, String bvnNumber) throws Exception {
    
    String baseUrl = "https://api.flutterwave.com/v3/kyc/bvns/";
    String urlString = baseUrl + bvnNumber;
    URL url = new URL(urlString);
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestMethod("GET");
    connection.setRequestProperty("Content-Type", "application/json");
    connection.setRequestProperty("Authorization", "Bearer " + apiKey);
    connection.setRequestProperty("cache-control", "no-cache");
    long timestamp = System.currentTimeMillis();
    String hash = StringUtils.upperCase(getHash(apiKey, secretKey, timestamp, ""));
    connection.setRequestProperty("X-Flutterwave-Idempotency-Key", apiKey + timestamp);
    connection.setRequestProperty("X-Flutterwave-Nonce", apiKey + timestamp);
    connection.setRequestProperty("X-Flutterwave-Signature", hash);
    int responseCode = connection.getResponseCode();
    BufferedReader in = new BufferedReader(
            new InputStreamReader(connection.getInputStream()));
    String inputLine;
    StringBuffer response = new StringBuffer();
    while ((inputLine = in.readLine()) != null) {
        response.append(inputLine);
    }
    in.close();
    System.out.println(response.toString());
    
}

3. 创建一个函数来生成签名哈希值

public static String getHash(String apiKey, String secretKey, long timestamp, String requestBody) throws Exception {
    
    String toBeHashed = apiKey + timestamp + requestBody;
    SecretKeySpec keySpec = new SecretKeySpec(secretKey.getBytes("UTF-8"), "HmacSHA256");
    Mac mac = Mac.getInstance("HmacSHA256");
    mac.init(keySpec);
    byte[] result = mac.doFinal(toBeHashed.getBytes("UTF-8"));
    return Hex.encodeHexString(result);
    
}

4. 调用函数

public static void main(String[] args) {
    
    String apiKey = "your_api_key";
    String secretKey = "your_secret_key";
    String bvnNumber = "12345678901";
    try {
        sendBVNRequest(apiKey, secretKey, bvnNumber);
    } catch (Exception e) {
        e.printStackTrace();
    }
    
}

结论

以上是使用Flutterwave BVN API检索和验证BVN信息的过程。通过使用上述代码片段，您可以在Java中使用Flutterwave BVN API，并在获取API密钥后使用相应功能。