dpp-spec

Note: This is currently a WIP as we transition documentation over to this specification repo.

Dash Platform Protocol Specification

The DPP spec defines a protocol for data objects which can be stored outside the blockchain layer. These objects can be verified using the blockchain via the inclusion of a cryptographic hash of the data objects into a DIP2 special transaction (which are indeed part of the Dash blockchain).

Table of Contents

• Overview
• Contributing
• Maintainers
• License

Overview

We define data objects which themselves are JSON and validated using the JSONSchema specification, using pre-defined JSON Schemas and meta-schemas which are currently available at: https://github.com/dashevo/js-dpp/tree/master/schema.

In addition to adherence to pre-defined JSON Schemata, we also define rules for hashing and serialization of these objects.

The included meta-schemas allow for creation of conforming schemas (called DPP-schemas) which are used to define fields in a Dash Platform application.

Hashing and Serialization

Objects are hashed using double-sha256. All objects to be hashed must use CBOR encoding as input to the hash function.

In pseudocode this example looks like:

const obj = {'dppid': 1234};
const cbor = CBORify(obj);
const theHash = hash(cbor);

Maintainers

@nmarley

Contributing

Feel free to dive in! Open an issue or submit PRs.

License

MIT © Dash Core Group, Inc.