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/contract*.wasm. Those are compiled and
optimized versions of contracts/hackatom
run through cosmwasm-opt.
To rebuild the test contract, 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=registry_cache,target=/usr/local/cargo/registry \
confio/cosmwasm-opt:0.6.2 ./contracts/hackatom
cp contracts/hackatom/contract.wasm lib/vm/testdata/contract_0.7.wasm