Check a verification code

Check the verification code that a user has provided. You should always check the verification code after sending it. This enables Vonage to determine the number of successful requests and protect against fraudulent use of the platform.

Where needed, replace the following variables in the sample code with your own values:

Key	Description
`REQUEST_ID`	The ID of the Verify request (this is returned in the API response when you send a verification code)
`JWT`	Used to authenticate your request. See Authentication for more information, including how to generate a JWT.
`VONAGE_APPLICATION_PRIVATE_KEY_PATH`	Private key path.
`VONAGE_APPLICATION_ID`	The Vonage Application ID.
`CODE`	The code the user supplies as having been sent to them

Write the code

Add the following to check-verification-code.sh:

curl -X POST "https://api.nexmo.com/v2/verify/$VERIFY_REQUEST_ID" \
  -H "Authorization: Bearer $JWT"\
  -H 'Content-Type: application/json' \
  -d $'{
    "code": "'$VERIFY_CODE'"
  }'

View full source

Run your code

Save this file to your machine and run it:

sh check-verification-code.sh

Prerequisites

npm install @vonage/server-sdk

Create a file named check-verification-code.js and add the following code:

const { Vonage } = require('@vonage/server-sdk');

const vonage = new Vonage ({
  applicationId: VONAGE_APPLICATION_ID,
  privateKey: VONAGE_APPLICATION_PRIVATE_KEY_PATH,
});

View full source

Write the code

Add the following to check-verification-code.js:

vonage.verify2.checkCode(VERIFY_REQUEST_ID, VERIFY_CODE)
  .then((status) => console.log(`The status is ${status}`),
  )
  .catch((err) => console.error(err));

View full source

Run your code

Save this file to your machine and run it:

node check-verification-code.js

Prerequisites

Add the following to build.gradle:

implementation 'com.vonage:server-sdk-kotlin:2.1.1'

Create a class named CheckVerificationCode and add the following code to the main method:

val client = Vonage {
    applicationId(VONAGE_APPLICATION_ID)
    privateKeyPath(VONAGE_PRIVATE_KEY_PATH)
}

View full source

Write the code

Add the following to the main method of the CheckVerificationCode class:

if (client.verify.request(VERIFY_REQUEST_ID).isValidVerificationCode(VERIFY_CODE)) {
    println("Code matches.")
}

View full source

Run your code

We can use the application plugin for Gradle to simplify the running of our application. Update your build.gradle with the following:

apply plugin: 'application'
mainClassName = project.hasProperty('main') ? project.getProperty('main') : ''

Run the following gradle command to execute your application, replacing com.vonage.quickstart.kt.verify with the package containing CheckVerificationCode:

gradle run -Pmain=com.vonage.quickstart.kt.verify.CheckVerificationCode

Prerequisites

Add the following to build.gradle:

implementation 'com.vonage:server-sdk:9.3.1'

Create a class named CheckVerificationCode and add the following code to the main method:

VonageClient client = VonageClient.builder()
		.applicationId(VONAGE_APPLICATION_ID)
		.privateKeyPath(VONAGE_PRIVATE_KEY_PATH)
		.build();

View full source

Write the code

Add the following to the main method of the CheckVerificationCode class:

try {
	client.getVerify2Client().checkVerificationCode(VERIFY_REQUEST_UUID, VERIFY_CODE);
	System.out.println("SUCCESS - code matches!");
}
catch (VerifyResponseException ex) {
	switch (ex.getStatusCode()) {
		case 400: // Code does not match
		case 404: // Already verified or not found
		case 409: // Workflow does not support code
		case 410: // Incorrect code provided too many times
		case 429: // Rate limit exceeded
		default:  // Unknown or internal server error (500)
			ex.printStackTrace();
	}
}

View full source

Run your code

We can use the application plugin for Gradle to simplify the running of our application. Update your build.gradle with the following:

apply plugin: 'application'
mainClassName = project.hasProperty('main') ? project.getProperty('main') : ''

Run the following gradle command to execute your application, replacing com.vonage.quickstart.verify2 with the package containing CheckVerificationCode:

gradle run -Pmain=com.vonage.quickstart.verify2.CheckVerificationCode

Prerequisites

Install-Package Vonage

Create a file named VerifyCodeRequest.cs and add the following code:

using Vonage;
using Vonage.Request;

View full source

Add the following to VerifyCodeRequest.cs:

var credentials = Credentials.FromAppIdAndPrivateKeyPath(VONAGE_APPLICATION_ID, VONAGE_APPLICATION_PRIVATE_KEY_PATH);
var client = new VonageClient(credentials);

View full source

Write the code

Add the following to VerifyCodeRequest.cs:

var request = Vonage.VerifyV2.VerifyCode.VerifyCodeRequest.Build()
    .WithRequestId(REQUEST_ID)
    .WithCode(CODE)
    .Create();
var response = await client.VerifyV2Client.VerifyCodeAsync(request);

View full source

Prerequisites

composer require vonage/client

Create a file named send_code.php and add the following code:

View full source

Write the code

Add the following to send_code.php:

View full source

Run your code

Save this file to your machine and run it:

php send_code.php

Prerequisites

pip install vonage python-dotenv

Write the code

Add the following to check-verification-code.py:

from vonage import Auth, Vonage
from vonage_verify import CheckCodeResponse

client = Vonage(
    Auth(
        application_id=VONAGE_APPLICATION_ID,
        private_key=VONAGE_PRIVATE_KEY,
    )
)

response: CheckCodeResponse = client.verify.check_code(
    request_id=VERIFY_REQUEST_ID, code=VERIFY_CODE
)
print(response)

View full source

Run your code

Save this file to your machine and run it:

python verify/check-verification-code.py

Prerequisites

gem install vonage

Create a file named check.rb and add the following code:

View full source

Write the code

Add the following to check.rb:

View full source

Run your code

Save this file to your machine and run it:

ruby check.rb