It calculates sqrt using an RPC server implemented in Rust.

• protoc from here
• scarb from here
• lambdaworks/provers/cairo from here for proving only. As of February 2024, the tested revision is fed12d6.

1. Start the hints server:
   1. Rust: cd rust; cargo run
   2. Javascript: cd js; npm install; npm start
2. Run scarb hints-run --oracle-server http://127.0.0.1:3000 --layout all_cairo

If the circuit requires built-ins, it's possible to add the flag --layout <VALUE>

It's possible to generate trace and memory files when running the circuit by adding the flags --trace-file <PATH> --memory-file <PATH>.

If the intention is to generate and verify a proof, execute scarb hints-run with the flag --proof-mode. The proof can be generated and verified using lambdaworks/provers/cairo. The command to generate the proof is: platinum-prover prove <TRACE_FILE> <MEMORY_FILE> <PROOF_FILE>. The command to verify a proof is: platinum-prover verify <PROOF_FILE>.

The command for running tests is: scarb hints-test --oracle-server http://127.0.0.1:3000 --layout all_cairo

Proof generation and verification has been tested exclusively with lambdaworks-fed12d6. Other versions may generate invalid proofs.

To install the prover, execute the following commands:

    git clone https://github.com/lambdaclass/lambdaworks.git
    cd lambdaworks
    git checkout fed12d674418e4f09bc843b71bc90008a85b1aed
    cd provers/cairo
    cargo install --path . --locked --features=cli,instruments,parallel