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A toolbox for zkSNARKs on Ethereum
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README.md

ZoKrates (AVM)

ZoKrates is a toolbox for zkSNARKs. This fork augments the capabilities of ZoKrates by adding the following command to the command line interface (CLI)

./zokrates export-avm-verifier [--proving-scheme <'G16'|'PGHR13'|'GM17'>] [--input <verifier path>] [--output <path>]

This command enables generation of SNARK verification contracts which can be deployed directly onto the Aion Virtual Machine (AVM). All other ZoKrates features (i.e. expressing SNARKs using the ZoKrates DSL) work as documented.

Note: Currently only the Groth 16 (G16) proving scheme is supported for AVM verifier export. Capabilities to export PGHR13 and GM17 will be added shortly.

This is a proof-of-concept implementation. It has not been tested for production.

Getting Started

  • Build zokrates using the build.sh or build_release.sh scripts (requires Rust to be installed).
  • Express a SNARK using the ZoKrates DSL as usual (the documentation is quite helpful). The built binary will be located in target/release or target/debug folder.
  • When you're ready to generate a AVM contract containing the SNARK verification logic, simply run through the compile > setup > compute-witness > generate-proof steps using the built ZoKrates binary as usual.
  • Instead of calling export-verifier (which generates a Solidity contract), call export-avm-verifier, which generates a set of Java source files within a directory called avm-verifier. The entry-point to the AVM contract is called Verifier.java.
  • Deploy the contract files in the avm-verifier directory the usual way :)
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