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How to Compile Solidity Smart Contracts

Use zksolc compiler to compile Solidity smart contracts. zksolc compiler requires solc to be installed. Specific version of zksolc compiler is compatible with specific versions solc so make sure to make correct versions of your compilers.

There are 3 solidity smart contracts:

  • Storage: contract without constructor.
  • Incrementer: contract with constructor.
  • Demo: contract that has dependency to Foo contract.

In following examples Docker is used to create containers with already solc installed.

Compile Smart Contracts

Run the container has solc tool already installed:

# create container with installed solc tool
SOLC_VERSION="0.8.19-alpine"
docker create -it --name zksolc --entrypoint ash  ethereum/solc:${SOLC_VERSION}

# copy smart contracts source files to container
docker cp examples/solidity zksolc:/solidity

# run and attach to the container
docker start -i zksolc

Run commands in container:

# download zksolc
ZKSOLC_VERSION="v1.3.9"
wget https://github.com/matter-labs/zksolc-bin/raw/main/linux-amd64/zksolc-linux-amd64-musl-${ZKSOLC_VERSION} -O /bin/zksolc; chmod +x /bin/zksolc

Compile Storage Smart Contract

# create combined-json with abi and binary
zksolc -O3 -o solidity/storage/build \
  --combined-json abi,bin \
  solidity/storage/Storage.sol

Compile Incrementer Smart Contract

# create combined-json with abi and binary
zksolc -O3 -o solidity/incrementer/build \
  --combined-json abi,bin \
  solidity/incrementer/Incrementer.sol

Compile Demo Smart Contract

# create combined-json with abi and binary
zksolc -O3 -o solidity/demo/build \
  --combined-json abi,bin \
  solidity/demo/Demo.sol \
  solidity/demo/Foo.sol

Exit from container

exit

Copy generated files from container to host machine

# copy generated files from container to host
docker cp zksolc:/solidity ./examples/

# remove container
docker rm zksolc

On host machine, for each smart contract there is build/combined.json file (e.g. solidity/storage/build/combined.json) that can be used in program for deploying and interacting with smart contract.