알림

{
    "event_name": "MERCHANTSHIELD_FRAUD",
    "creation_time": "2024-01-18T10:29:20.484649887Z",
    "notification_id": "0597ae4c-b6d2-4d47-ba58-36534e04f1cf",
    "payload": {
        "risk_id": "9beabb6d-77b9-474e-852a-3cb9fedabb3a",
        "entity_type": "BookingFraud",
        "entity_id": "1e5092ad-4440-40cf-9a14-0bf76ced339c",
        "decision_date_time": "2024-03-07T22:28:33.552Z",
        "decision": "PASS",
        "recommended_actions": [
            "RELEASE"
        ],
        "partner_account_id": "972edd1c-b50f-4d7e-b5bb-05212aa20d03"
    }
}

{
    "event_name": "MERCHANTSHIELD_FRAUD",
    "creation_time": "2024-01-18T10:29:20.484649887Z",
    "notification_id": "c9235ccb-8716-4ac3-a3ad-ef96042aa32a",
    "payload": {
        "risk_id": "d2f0d5ab-cda1-484e-9507-e0fcf81960dc",
        "entity_type": "Account",
        "entity_id": "13538ba1-df41-446c-8266-4f325e4ef264",
        "decision_date_time": "2024-03-07T22:28:33.552Z",
        "decision": "PASS",
        "recommended_actions": [],
        "partner_account_id": "34f8df88-26f3-48f2-a81b-12fae9306192"
    }
}

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.util.Base64;

public class TestApplication {

    public static final String HMAC_SHA_256 = "HmacSHA256";

    public static void main(String[] args){

        // extracted data from the notification request payload
        // x-eg-notification-timestamp: 1634021234
        String eg_timestamp_header_value = "timestamp_header_value";
        // x-eg-notification-signature: SHA256=signature_header_value
        String eg_signature_header_value = "signature_header_value";
        // api-key: api_key_to_validate
        String api_key_header_value = "api_key_to_validate";
        // json payload
        String json_payload = "json_payload";

        // your api key
        String api_key = "your_api_key";
        // signing secret from the secret store
        String your_endpoints_signing_secret = "your_endpoints_signing_secret";


        if (!api_key.equals(api_key_header_value)) {
            throw new RuntimeException("Failure! Api key does not match expected value!");
        }

        try {
            // Prepare the `signed_payload` string
            String signed_payload = eg_timestamp_header_value + "." + json_payload;

            // Determine the expected signature
            String expected_signature = generate_hmac(signed_payload,
                    your_endpoints_signing_secret);

            if (!eg_signature_header_value.equals(expected_signature)) {
                throw new RuntimeException("Failure! Signature does not match expected value!");
            }

            System.out.println("Success! The generated signature matches the expected value.");
        } catch (NoSuchAlgorithmException | InvalidKeyException e) {
            System.err.println("Error generating HMAC: " + e.getMessage());
        }
    }

    /**
     * Generates a hashed message authentication code using the HMAC-SHA256 algorithm.
     * This method may throw an Exception when the HMAC-SHA256 algorithm is not supported
     * or the secret key is invalid.
     *
     * @param message The message to be encoded
     * @param secret The secret key
     * @return The Base64 encoded HMAC
     */
    public static String generate_hmac(String message, String secret)
            throws NoSuchAlgorithmException, InvalidKeyException {
        Mac sha256_hmac = Mac.getInstance(HMAC_SHA_256);
        SecretKeySpec secret_key_spec = new SecretKeySpec(secret.getBytes(), HMAC_SHA_256);
        sha256_hmac.init(secret_key_spec);
        byte[] hmac = sha256_hmac.doFinal(message.getBytes());
        return Base64.getEncoder().encodeToString(hmac);
    }
}