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Vingd

Vingd enables users to pay with money or with time. Money goes directly to publishers and time is monetized indirectly through interaction with brands, content creation, loyalty, bringing new users, etc. As a result Vingd dramatically increases monetization while keeping reach. Vingd's secret sauce are mathematical models that are adapting to each user in order to extract as much value as possible from their time.

We use vingds (think of it as "digital currency", points, or credits) to express the value ("price") of intangible goods (such as TV streams or newspaper articles), to reward users for their activity (time), or to authorize ("charge") them access to digital goods.

Vingd API for Java

Vingd API enables you to register Vingd objects you're selling, create Vingd purchase orders, verify and commit Vingd purchases. You can also reward users, either directly (in backend), or indirectly via Vingd vouchers (Note: rewarding is not yet implemented in Java version of the library). Non-Java demos are available.

Installation

The last stable release of Java Vingd API is available on GitHub:

$ git clone https://github.com/vingd/vingd-api-java
$ # open in eclipse

Alternatively, you can download a zip archive.

Examples

Client initialization:

import com.vingd.client.VingdClient;
import com.vingd.client.VingdOrder;
import com.vingd.client.VingdPurchase;
import com.vingd.client.exception.VingdOperationException;
import com.vingd.client.exception.VingdTransportException;

String vingdUsername = "test@vingd.com";
String vingdPassword = "123";

// Initialize Vingd client.
VingdClient v = new VingdClient(
    vingdUsername, VingdClient.SHA1(vingdPassword),
    VingdClient.sandboxEndpointURL, VingdClient.sandboxFrontendURL
);

Sell content

Wrap up Vingd order and redirect user to confirm his purchase at Vingd frontend:

// Selling details.
String objectName = "My test object";
String objectURL = "http://localhost:666/";
double orderPrice = 200;

// Register Vingd object (once per selling item).
long oid = v.createObject(objectName, objectURL);

// Prepare Vingd order.
VingdOrder order = v.createOrder(oid, orderPrice);

// Order ready, redirect user to confirm his purchase at Vingd frontend.
String orderURL = order.getRedirectURL();

As user confirms his purchase on Vingd frontend he is redirected back to object URL expanded with purchase verification parameters.

// User confirmed purchase on Vingd frontend
// and came back to http://localhost:666/?token={"oid":<oid>,"tid":<tid>}

// Verify purchase with received parameters.
VingdPurchase purchase = v.verifyPurchase(<token_json_dictionary_from_query>);

// Purchase successfully verified, serve purchased content to user.
// ... content serving ...

// Content is successfully served, commit Vingd transaction.
v.commitPurchase(purchase);

Documentation

Full Java library documentation is not yet available, however general outline (with communication sequence diagrams) of interaction with Vingd is available in the vingd-flow.pdf. You can also browse through semantically equivalent PHP docs and Python docs. Feel free to inspect the VingdClient class code/comments for details.

Copyright and License

Vingd API is Copyright (c) 2013 Vingd, Inc and licensed under the MIT license. See the LICENSE file for full details.

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