📜 scroll-prover 📜

Usage

Prerequisite

Install Solidity compiler solc of version 0.8.19 via svm-rs:

cargo install svm-rs
svm install 0.8.19

Fetch git-submodule of test traces

git submodule init
git submodule update --checkout

Download all setup params, degree 20, 24 and 26 are used in config. Could only download params of degree 26, but it may affect performance (when downsizing params).

make download-setup -e degree=20
make download-setup -e degree=24
make download-setup -e degree=26

Or specify other degree and target directory to download.

# As default `degree=26` and `params_dir=./integration/test_params`.
make download-setup -e degree=DEGREE params_dir=PARAMS_DIR

Testing

make test-chunk-prove and make test-agg-prove are the main testing entries for multi-level circuit constraint system of scroll-prover. Developers could understand how the system works by reading the codes of these tests.

And there are other tests:

• make test-inner-prove could be used to test the first-level circuit.
• make test-batch-prove could be used to test the final two levels.
• make test-batches-with-each-chunk-num-prove could be used to test batch proving with different chunk numbers.

Binaries

Could use the following command to run binaries locally.

If run into linking issues you may need to run

cp `find ./target/release/ | grep libzktrie.so` /usr/local/lib/

To move the zktrielib into a path where your linker could locate it.

Run zkevm prover to generate chunk proof (work directory is ./integration)

cargo build --release --bin zkevm_prove

./target/release/zkevm_prove --help

Could specify arguments as

# Proof data will be saved to `./integration/proof_data`.
export OUTPUT_DIR="proof_data"

# Params file should be located in `./integration/test_params`.
cargo run --release --bin zkevm_prove -- --params=test_params --trace=tests/extra_traces/new.json

Run zkevm verifier to verify chunk proof (work directory is ./integration)

cargo build --release --bin zkevm_verify

./target/release/zkevm_verify --help

Could specify arguments as

cargo run --release --bin zkevm_verify -- --params=test_params --proof=proof_data

Scripts

• If you have read access for DB, could run command to generate full-proof for batch tests:

export DB_HOST=
export DB_USER=
export DB_NAME=

sh scripts/gen_full_chunk_proofs.sh BATCH_INDEX

Dockers

• docker/chunk-prover is used to build and run GPU chunk-prover.
• docker/mock-testnet is used to build and run GPU mock-testnet (inner-prove or chunk-prove).

Verifier Contract

Both YUL and bytecode of verifier contract could be generated when running aggregation tests (make test-agg-prove). After running aggregation tests, a new folder is created in integration folder of scroll-prover and named as agg_tests_output_multi_DATE_TIME. It contains below files:

• Chunk protocol: chunk_chunk_0.protocol
• Chunk VK: vk_chunk_0.vkey
• Batch VK: vk_batch_agg.vkey
• Verifier YUL source code: evm_verifier.yul
• Verifier bytecode: evm_verifier.bin

The YUL source code is generated by params, VK and num instance of proof, could reference gen_evm_verifier function in snark-verifier.

The verifier bytecode is compiled from YUL source code, it invokes Solidity compiler (0.8.19 as mentioned above) command line with specified parameters, could reference compile_yul function in snark-verifier.

License

Licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.