Horizen Sidechain SDK Documentation


Horizen Sidechain SDK allows developers to quickly spin-up their own blockchain, customize business logic depending on use case, maintain interoperability with the mainchain native token (which acts as the medium of exchange between the whole ecosystem).

Sidechain SDK offers out-of-the-box support for the common features you’d expect from a Blockchain, but can also be easily customised and extended by developers to create a Blockchain that is tailored to their precise needs.

Tutorials - start here

For the new Sidechain developer, from installation to creating your own decentralized applications.


Practical step-by-step guides for the more experienced developer, covering several important topics.


Explanation and analysis of some key concepts in Sidechain SDK.


Technical reference material, for classes, methods, APIs, commands.


General documentation and guides

Join us online

Horizen Sidechain SDK is supported by a friendly and very knowledgeable community.

Join our Discord Server, and check the #sidechains channel

Our StackOverflow is for questions around Sidechain SDK development.

Why Horizen Sidechains?

The first decentralized and fully customizable sidechain protocol in the industry that solves the biggest problems in applying blockchain solutions to real-world use cases.

  • A Novel Construction

A revolutionary system of blockchains with decoupled consensus linked through common Cross-Chain Transfer Protocol (CCTP) — is indefinitely scalable, fully configurable to meet heterogeneous needs, and inclusive of embedded incentives for endogenous growth.

  • Scalability and Flexibility

Zendoo uses a modular protocol that stresses functionality over design choice. Any type of rules can be deployed as a sidechain with this framework – whether it’s a blockchain or other types of computing systems. This modularization enables massive scalability, application design freedom, and flexibility such that any component can be changed over time.

  • Decentralization

Zendoo is decentralized in all its components. Decentralization provides resilience and reliability to the network. The Zendoo sidechain platform is fueled by a well-adopted cryptocurrency, ZEN, and supported by the largest node infrastructure in the industry. Furthermore, Zendoo doesn’t rely on third parties for backward transfers, removing the need for trusted parties and honesty.

  • Privacy and Auditability

Zendoo allows the verification of sidechains by the mainchain, without knowing the internal structure of the sidechain. Zendoo SDK provides a set of tools that will enable the creation of auditable and privacy-preserving blockchain applications, a requirement for many real-world applications.

  • Easy Deployment with the Sidechain SDK

Zendoo comes with an SDK that includes all necessary components required for building a blockchain in a single toolbox. This allows developers to focus only on the specific features of their blockchain instead of low-level tasks, making the deployment of a complete blockchain much easier and faster.