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@tokamak-zk-evm/subcircuit-library

v2.0.15

Published

Prebuilt R1CS subcircuit library package for Tokamak zk-EVM

Vulnerabilities

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Links

Git

Maintainers

jehyukjehyukyoungsungsonyoungsungson

Keywords

artifactscircomethereumr1cssubcircuit-librarysubcircuitszero-knowledgetokamaktokamak-zk-evmlayer2tokamak-networkwasmzk-EVMzk-SNARK

Readme

Tokamak zk-EVM Subcircuit Library

Tokamak zk-EVM Subcircuit Library is a prebuilt R1CS subcircuit library package for Tokamak zk-EVM.

The published package exposes consumer-facing subcircuit artifacts, metadata, witness-generation helpers, and synced Circom constants used by Tokamak zk-EVM consumers on the main branch.

Release notes are maintained in the repository changelog.

Installation

npm install @tokamak-zk-evm/subcircuit-library

Package Contents

  • subcircuits/library/r1cs/: prebuilt R1CS subcircuit artifacts.
  • subcircuits/library/wasm/: per-subcircuit WASM artifacts used for witness generation and runtime loading.
  • subcircuits/library/json/: per-subcircuit JSON outputs generated alongside the compiled library.
  • subcircuits/library/*.json: library-wide metadata such as setup parameters, global wiring, frontend configuration, and the subcircuit catalog.
  • subcircuits/library/*.js: witness-generation helper scripts published with the library.
  • subcircuits/circom/constants.circom: synced Circom constants used by the generated library.
  • build-metadata.json: build metadata for the published package, including the tokamak-l2js package version used to generate the library.

Consumers

  • tokamak-cli: orchestrates install, setup, proving, and verification flows that package the generated subcircuit library into runnable resources.
  • synthesizer: consumes the published library metadata and WASM artifacts to synthesize transaction-specific circuit inputs.
  • backend: uses the subcircuit library as setup and proving input for the Tokamak zk-SNARK backend.
  • Tokamak-zk-EVM-contracts: integrates the generated subcircuit library through repository-level coordination with the Tokamak zk-EVM stack.

Example Integration

The synthesizer packages use the library as an installed artifact package rather than as a source dependency:

  1. They load library-wide metadata such as setup parameters, wiring data, frontend configuration, and the subcircuit catalog from the published package.
  2. They resolve that metadata into an internal subcircuit-library model used by the synthesizer runtime.
  3. They load the matching WASM subcircuit artifacts from the installed package to drive witness generation and execution-specific subcircuit handling.
  4. The web-facing synthesizer build can bundle those published assets ahead of time, while the Node-targeted synthesizer resolves them from the installed package at runtime.

Compatibility

Published artifacts are consumer-facing and platform-neutral. Maintainer-side regeneration of the library is documented separately.

| Surface | Compatibility | | --- | --- | | Consumer support | Supported for main-branch consumers of tokamak-cli, synthesizer, backend, and Tokamak-zk-EVM-contracts. | | Runtime shape | Consumers integrate against published R1CS, JSON metadata, WASM artifacts, witness-generation helpers, and synced Circom constants. | | Maintainer tooling | Source regeneration of the library is maintained on Node.js 18+ for macOS and Linux. |

FAQ

Is this package source circuits or prebuilt artifacts?

It is the published prebuilt subcircuit library package. Consumers use the generated artifacts that are shipped through npm.

How do consumers use this package?

Consumers install the package and read its published artifacts and metadata. They do not use it as an application-level API library.

What formats does the package publish?

The package publishes R1CS artifacts, WASM artifacts, JSON metadata, witness-generation helper scripts, and synced constants.circom.

Is it compatible with the Tokamak zk-EVM main branch?

Yes. This package is documented and maintained as the consumer-facing subcircuit library surface for main-branch Tokamak zk-EVM consumers.

Was this package previously called QAP compiler?

The maintainer-side generation algorithm and tooling are still referred to as qap-compiler in repository-internal contexts. The published consumer package is the Tokamak zk-EVM Subcircuit Library.

Further Documentation

Original Contribution

  • JehyukJang: Overall planning and direction. Constraints optimization.
  • pleiadex: Initial subcircuits design and implementation. Script development.
  • jdhyun09: Improvement of EVM compatibility. Constraints optimization.

License

Dual-licensed under MIT OR Apache-2.0.