This is an abstraction layer around the wasmer VM to expose just what we need to run cosmwasm contracts in a high-level manner. This is intended both for efficient writing of unit tests, as well as a public API to run contracts in eg. go-cosmwasm. As such it includes all glue code needed for typical actions, like fs caching.
There are demo files in testdata/*.wasm. Those are compiled and optimized
versions of
contracts/hackatom
and
contracts/staking
run through rust-optimizer.
To rebuild the test contracts, go to the repo root and do
```sh docker run --rm -v "$(pwd)":/code \ --mount type=volume,source="$(basename "$(pwd)")cache",target=/code/target \ --mount type=volume,source=registrycache,target=/usr/local/cargo/registry \ cosmwasm/rust-optimizer:0.8.0 ./contracts/hackatom \ && cp contracts/hackatom/contract.wasm packages/vm/testdata/contract_0.8.wasm
docker run --rm -v "$(pwd)":/code \ --mount type=volume,source="$(basename "$(pwd)")cache",target=/code/target \ --mount type=volume,source=registrycache,target=/usr/local/cargo/registry \ cosmwasm/rust-optimizer:0.8.0 ./contracts/staking \ && cp contracts/staking/contract.wasm packages/vm/testdata/staking.wasm ```
By default, this repository is built and tested with the singlepass backend. This requires running Rust nighty:
sh
cd packages/vm
cargo +nightly test
To test with Rust stable, you need to switch to cranelift:
sh
cd packages/vm
cargo test --no-default-features --features default-cranelift
This package is part of the cosmwasm repository, licensed under the Apache License 2.0 (see NOTICE and LICENSE).