PolkaZK Verifier SDK

Overview

PolkaZK Verifier SDK is a developer-friendly Zero-Knowledge toolkit that eliminates the complexity of zkSNARK implementation by providing a one-command solution for Circom circuit compilation, Groth16 trusted setup, and verifier smart contract deployment on PolkaVM-compatible chains. This SDK enables developers to integrate privacy-preserving zero-knowledge proofs into their applications with minimal to no cryptographic expertise required.

The team recently won first prize at the Polkadot AssetHub Hackathon in Goa for this project's MVP. The SDK suite is built specifically utilising the PolkaVM's advantages over standard EVMs and EVM forks. The platform transforms complex zkSNARK workflows (typically requiring deep knowledge of Circom, SnarkJS, and Groth16 trusted setup ceremonies) into simple CLI commands and JavaScript function calls, making zero-knowledge technology accessible to mainstream developers.

Why Kusama?

• Kusama’s new alignment with ZK innovations makes this SDK a perfect fit for Kusama.
• PolkaVM is ready to use on the Kusama AssetHub.
• The SDK is not only usable for the Polkadot ecosystem developers, but also for the web2 developers who just want to generate as well as verify zkProofs in a decentralised manner without the need of them going through the vast web3 learning curve.

About PolkaZK Verifier SDK

zk-polka-sdk introduces a powerful, frictionless and developer-friendly Zero-Knowledge Proof (ZKP) abstraction layer tailored for all kinds of developers. It integrates the industry-standard Circom and SnarkJS stack to allow developers to compile circuits, generate proofs, and deploy Solidity verifier contracts directly onto PolkaVM-compatible parachains, all with a single command/function call.

Technical Specifications: PolkaZK Verifier SDK: Tech Specifications 👈

Target audience

• dApp developers building on PolkaVM or Substrate-based chains
• Parachain teams looking to enable private logic or compliance (e.g., age verification, KYC-gated access)
• Frontend and UI engineers integrating on-chain verifiers with zero-knowledge backend logic
• Hackathon builders and early-stage startups
• Ecosystem educators and researchers
• Web2 developers looking for plug-n-play SDK for zkProofs

Importance

• Provides fully on-chain ZK workflows which EVMs or equivalent forks are just incapable due to the standard code/blob size limit.
• Provides a high-level, user-friendly SDK that wraps the low-level Circom + SnarkJS toolchain.
• Simplifies complex ZK workflows (compilation → trusted setup → proof → verifier → on-chain verification).
• Eliminates the need for deep cryptographic or protocol knowledge to use ZK in production.
• Enables developers to create privacy-first apps without ever writing Solidity.

Impact

• Solution/suite built on the real-world feedback from the hackathon participants struggling to integrate Circom/SnarkJS workflows.
• Developer discussions across Polkadot Forum and Substrate StackExchange emphasizing the lack of plug-and-play ZK tooling.
• A comparative gap in documentation and tooling for Circom/SnarkJS in non-EVM environments.
• Observed limitations of ZK projects in other ecosystems; most are either closed, highly abstracted, or coupled tightly to their L2 protocols.
• High interest in use cases like ZK-based identity, voting, and selective disclosure, but limited tooling support to implement them.

Development Roadmap

Overview

• Estimated Duration: 3 - 4 months (77 working days, 40 hours per week of development commitment)
• Full-Time Equivalent (FTE): 1.3 FTE
• Total Costs: $49,440 USD

Phase 1: Core SDK Foundation (Duration: 6 weeks)

Phase 2: PolkaVM Integration & Production Features (Duration: 5-6 weeks)

Budget Breakdown

Multisig details:

Address: Ga8F4epsSY8pw3f7Qdjq3T6gjtC28ZnCdHhRykNX85npSkU
Threshold: 3/4 {2 team members and 2 contributors from Edgetributor SubDAO}

Contributors involved:

• Jatin Sahijwani:
  • https://github.com/jatinsahijwani
  • https://x.com/jatinsahijwani1
  • https://www.linkedin.com/in/jatinsahijwani/
• Anirudh Singh Chouhan:
  • https://github.com/AnirudhSingh07
  • https://x.com/KunwarAnirudhS3
  • https://www.linkedin.com/in/anirudhsinghchouhan/

Team Code Repos:

• https://github.com/jatinsahijwani/zk-polka-sdk
• https://github.com/AnirudhSingh07/web3test (Implementation using the mvp)

Edgetributor SubDAO’s role:

Edgetributor SubDAO (6 contributors) will be responsible for the following key operations, corresponding to the development span of 4 months:

• Project Management & Operations {Shankar, Gagan, Prashant}: 72 hours
• Architecture/Design/UX reviews {Rama, Shankar, Gagan}: 64 hours
• DevOps/ QA {Raj, Pranav}: 72 hours

{520 USD per contributor per month.}

Conclusion

We are passionate about privacy and accessibility in web3. We've seen how difficult it is for developers, especially newcomers, to use zero-knowledge proofs due to complex tooling and cryptographic knowledge requirements. Through ZK-POLKA-SDK we will democratize access to this powerful technology and make Kusama AssetHub the most developer-friendly hub for zk-based applications. By building this SDK, we aim to empower builders and attract more developers to Kusama through a seamless zk-onboarding experience.