Docker image (and wrappers) for reproducible contract builds (Rust). See docs.multiversx.com.
We use docker buildx to build the image:
docker buildx build --output type=docker --no-cache . -t sdk-rust-contract-builder:next -f ./Dockerfile
Maintainers can publish the image as follows:
docker buildx create --name multiarch --use
docker buildx build --no-cache --push --platform=linux/amd64,linux/arm64 . -t multiversx/sdk-rust-contract-builder:next -f ./Dockerfile
docker buildx rm multiarch
For the above to work properly, make sure to install tonistiigi/binfmt beforehand. Please follow the official Docker documentation here.
Though, note that currently (January 2023) we recommend against using the linux/arm64 image for performing reproducible contract builds. This is because, in some (possibly rare) circumstances, a WASM binary generated on the linux/amd64 image might differ (at the bytecode level) from one generated on the linux/arm64 image - probably due to distinct (unfortunate) bytecode-emitting logic in the Rust compiler.
If you are using a Mac with ARM64, we recommend setting the following variable beforehand (contract builds will be slower, but this eliminates the risk of not being able to reproduce the build on Linux):
export DOCKER_DEFAULT_PLATFORM=linux/amd64
Building from a project folder:
python3 ./build_with_docker.py --image=sdk-rust-contract-builder:next \
--project=~/contracts/example \
--output=~/contracts/output-from-docker
Building from a packaged source code:
python3 ./build_with_docker.py --image=sdk-rust-contract-builder:next \
--packaged-src=~/contracts/example-0.0.0.source.json \
--output=~/contracts/output-from-docker
pytest .
python3 ./integration_tests/test_previous_builds_are_reproducible.py --selected-builds "a.1" [...]
python3 ./integration_tests/test_project_folder_and_packaged_src_are_equivalent.py