snarkjs VS perpetualpowersoftau

git clone https://github.com/iden3/snarkjs cd snarkjs npm ci cd ../simple-zk

The generated wasm and r1cs files are available in the build folder. To generate the proof, we need a proving key file, and to generate this file, we need a ptau file. This ptau file can be generated by snarkjs, or you can download a pregenerated one (you can find the links in the snarkjs repo). For testing, the generated one is good for us, but in your production app, it’s recommended to do the ceremony and generate your own ptau file. (You can read about it in my previous article.)

Their goal was to teach how to use Circom to build zero-knowledge circuits and SnarkJS to compile them into solidity smart contracts.

Oh yeah, this is a known issue with windows; it's perfect on Mac. Do the steps here resolve it: https://github.com/iden3/snarkjs/issues/57 ?

The project mentions that it uses snarkjs and I thought I'd link it directy here. [1] What's interesting in the setup of systems like this one is the "Powers of Tau" ceremony which in decentralized manner (secure multi-party computation) avoid the "trusted setup" problem in non-interactive variants of zero knowledge proof systems like this one. [2]

[1] https://github.com/iden3/snarkjs

[2] https://github.com/ebfull/powersoftau

The formats used in this library for the multi-party computation are compatible with the ones used in Semaphore's Perpetual Powers of Tau and other implementations.