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zk-rollup
ZK-rollup in Javascript, using circom & snarkJS. This is a meant-to-be-simple implementation aimed at learners.
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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
This is an example of a simple ZK-rollup application for Ethereum meant to help learner-practitioners of zero-knowledge applications. We use the Circom and SnarkJS.The main goal here is to document the implementation with a clean, well-organized code, making the topic more accessible to beginners. In addition, the scripts subdirectory has useful scripts for the ZK-proof pipeline in Javascript.
NOTE: I also published a meant-to-be-learned Javascript project for threshold signatures, blind signatures, ring signatures, KZG polynomial commitments, verifiable random functions (VRFs), etc in "Learning Cryptography with Javascript" (https://github.com/hammurabi-mendes/learn-crypto-javascript).