Gr4vy SDK for Java

Gr4vy provides any of your payment integrations through one unified API. For more details, visit gr4vy.com.

Installation

Add the jitpack.io repository to your pom.xml:

	<repository>
	    <id>jitpack.io</id>
	    <url>https://jitpack.io</url>
	</repository>

Add the gr4vy-java dependency to your pom.xml:

  	<dependency>
	    <groupId>com.github.gr4vy</groupId>
	    <artifactId>gr4vy-java</artifactId>
	    <version>0.27.0</version>
	</dependency>

Getting Started

To make your first API call, you will need to request a Gr4vy instance to be set up. Please contact our sales team for a demo. Please ensure that you have the latest version of com.squareup.okhttp3

Once you have been set up with a Gr4vy account you will need to head over to the Integrations panel and generate a private key. We recommend storing this key in a secure location but in this code sample we simply read the file from disk.

Import Gr4vy:

import com.gr4vy.sdk.*;
import com.gr4vy.api.model.*;

Call the API:

	Gr4vyClient client = new Gr4vyClient.Builder()
				.gr4vyId("[YOUR_GR4VY_ID]")
				.privateKeyLocation("private_key.pem")
				.build();

	try {
		Buyers result = gr4vyClient.listBuyers(null, null, null);
		System.out.println(result);
	} catch (Gr4vyException e) {
		System.err.println("Exception when calling Gr4vyClient#listBuyers");
		System.err.println("Status code: " + e.getCode());
		System.err.println("Reason: " + e.getResponseBody());
		System.err.println("Response headers: " + e.getResponseHeaders());
	}

Environment

The SDK defaults the environment to "sandbox", to send transactions to production, set the environment in Gr4vyClient:

	Gr4vyClient client = new Gr4vyClient.Builder()
				.gr4vyId("[YOUR_GR4VY_ID]")
				.privateKeyLocation("private_key.pem")
				.environment("sandbox")
				.build();

	Gr4vyClient client = new Gr4vyClient.Builder()
				.gr4vyId("[YOUR_GR4VY_ID]")
				.privateKeyLocation("private_key.pem")
				.environment("production")
				.build();

Multi merchant

In a multi-merchant environment, the merchant account ID can be set after the SDK has been initialized.

	Gr4vyClient client = new Gr4vyClient.Builder()
				.gr4vyId("[YOUR_GR4VY_ID]")
				.privateKeyLocation("private_key.pem")
				.merchantAccountId("default")
				.build();

Gr4vy Embed

To create a token for Gr4vy Embed, call the client.getEmbedToken(embed) function with the amount, currency, and optional checkout session and optional buyer information for Gr4vy Embed.

	Gr4vyClient client = new Gr4vyClient.Builder()
				.gr4vyId("[YOUR_GR4VY_ID]")
				.privateKeyLocation("private_key.pem")
				.build();
			
	Map<String, Object> embed = new HashMap<String, Object>();
	embed.put("amount", 1299);
	embed.put("currency", "USD");

	String token = client.getEmbedToken(embed);

You can now pass this token to your front-end where it can be used to authenticate Gr4vy Embed.

The buyer_id and/or buyer_external_identifier fields can be used to allow the token to pull in previously stored payment methods for a user. A buyer needs to be created before it can be used in this way.

	Gr4vyClient client = new Gr4vyClient.Builder()
				.gr4vyId("[YOUR_GR4VY_ID]")
				.privateKeyLocation("private_key.pem")
				.build();
	
	BuyerRequest buyer = new BuyerRequest();
	buyer.setDisplayName("Tester T.");
	try {
		Buyer result = gr4vyClient.newBuyer(buyer);
		System.out.println(result);
	} catch (ApiException e) {
		
	}

Builder

The Gr4vy client can be initialized with the Gr4vyClient.Builder. The following fields can be optionally set using the builder:

  	Gr4vyClient client = new Gr4vyClient.Builder()
				.gr4vyId("[YOUR_GR4VY_ID]") // required
				.privateKeyLocation("private_key.pem") // conditional
				.privateKeyString("-----BEGIN PRIVATE KEY-----\n...") // conditional
				.environment("sandbox") // optional, defaults to sandbox
				.host(null) // optional - allows setting a custom host
				.client(null) // optional - allows setting the http client
				.merchantAccountId("default") // optional, defaults to default
				.connectTimeout(Duration.ofSeconds(10)) // optional, defaults to 10s
				.writeTimeout(Duration.ofSeconds(10)) // optional, defaults to 10s
				.readTimeout(Duration.ofSeconds(30)) // optional, defaults to 30s
				.build();

Setting Private Key

Your API private key can be created in your admin panel on the Integrations tab.

There are three methods of setting the private key when using the SDK:

1. Setting the privateKeyLocation, which is a path to the location of the pem file e.g.

   	Gr4vyClient client = new Gr4vyClient.Builder()
   		.gr4vyId("[YOUR_GR4VY_ID]")
   		.privateKeyLocation("./path/to/private_key.pem")
   		.build();

2. Setting the privateKeyString to the value of the private key e.g.

   	Gr4vyClient client = new Gr4vyClient.Builder()
   		.gr4vyId("[YOUR_GR4VY_ID]")
   		.privateKeyString("-----BEGIN PRIVATE KEY-----\n...")
   		.build();

3. Setting the environment variable PRIVATE_KEY

Making API calls

This library conveniently maps every API path to a separate function. For example, GET /buyers?limit=2 would be:

	Map<String, Object> params = new HashMap<String, Object>();
    params.put("limit", 2);
	Buyers response = client.listBuyers(params);

To create, the API requires a request object for that resource that is conveniently named <Resource>Request. To update, the API requires a request object for that resource that is named <Resource>Update.

For example, to create a buyer you will need to pass a BuyerRequest object to the addBuyer method.

	BuyerRequest buyer = new BuyerRequest();
	buyer.setDisplayName("Tester T.");
	Buyer result = client.addBuyer(buyer);

So to update a buyer you will need to pass in the BuyerUpdate object to the updateBuyer method.

	BuyerUpdate buyer = new BuyerUpdate();
	buyer.setDisplayName("Tester T.");
	Buyer result = client.updateBuyer(buyerId, buyer);

Generating an API Token for calls outside the SDK

You can also use the SDK to generate a stand-alone API Token by calling the getToken method:

	Gr4vyClient client = new Gr4vyClient.Builder()
			.gr4vyId("[YOUR_GR4VY_ID]")
			.privateKeyString("-----BEGIN PRIVATE KEY-----\n...")
			.build();
	String[] scopes = {"*.read", "*.write"};
	String token = client.getToken(scopes);

Development

Updating models

To update API models, run the following command:

./openapi-generator-generate.sh

Run the tests to ensure the changes do not break any existing tests.

mvn test

Publishing

This library is published using Maven.

License

This library is released under the MIT License.