EY Blockchain Privacy Sandbox
The EY Blockchain Privacy Sandbox is a web-based development environment that allows developers to experiment with the Starlight compiler directly in the browser, without setting up a local development environment.
The sandbox includes sample projects that can be explored, cloned, and modified, helping developers understand how standard Solidity contracts are transformed into privacy-preserving applications.
It is designed for experimentation and proof-of-concept development, enabling developers to validate privacy use cases quickly before integrating Starlight into broader development workflows.
Starlight is an open-source zero-knowledge proof (ZKP) compiler for building privacy-preserving applications on the public Ethereum blockchain or other EVM-compatible blockchains.
It transforms standard Solidity smart contracts into private applications by replacing sensitive on-chain data with cryptographic commitments and zero-knowledge proofs, while preserving the original contract logic and execution flow.
Starlight is contributed by EY to the public domain and is available via its public GitHub repository for developers who wish to use it within their local development environments.
Latest Starlight update: Day 3 - EY Global Blockchain Summit 2025
Create and manage projects
Create new sandbox projects directly in the browser. Each project provides a structured workspace to develop, configure, and experiment with privacy-preserving smart contracts using the Starlight compiler.
Explore sample projects
Get started quickly using pre-built sample projects that demonstrate common privacy patterns. Developers can view, clone, and modify sample projects to quickly start building their own privacy-preserving applications.
Compile private smart contracts
Use the Starlight compiler within the sandbox to convert Solidity smart contracts into privacy-preserving applications. Sensitive variables are replaced with cryptographic commitments and zero-knowledge proofs, while preserving the original contract logic.
Configure and test in one environment
Configure projects and run tests directly within the sandbox, enabling developers to validate functionality, verify contract behavior, and iterate rapidly without local setup.
Proof-of-concept development
Designed for experimentation and learning, the sandbox allows developers to rapidly prototype and validate proof-of-concept use cases via a web-based user interface and API-based integration testing.
The team
Clare Adelgren
EY Interim Global Blockchain Leader
Wenxing Wang
EY Global Blockchain Product Manager
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