CosmWasm VM
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.
Compatibility
A VM can support one or more contract-VM interface versions. The interface version is communicated by the contract via a Wasm import. This is the current compatibility list:
cosmwasm-vm | Supported interface versions | cosmwasm-std |
---|---|---|
1.0 | interface_version_8 |
1.0 |
0.16 | interface_version_7 |
0.16 |
0.15 | interface_version_6 |
0.15 |
0.14 | interface_version_5 |
0.14 |
0.13 | cosmwasm_vm_version_4 |
0.11-0.13 |
0.12 | cosmwasm_vm_version_4 |
0.11-0.13 |
0.11 | cosmwasm_vm_version_4 |
0.11-0.13 |
0.10 | cosmwasm_vm_version_3 |
0.10 |
0.9 | cosmwasm_vm_version_2 |
0.9 |
0.8 | cosmwasm_vm_version_1 |
0.8 |
Changes between interface versions
interface_version_5 -> interface_version_6
- Rename the fields from
send
tofunds
inWasmMsg::Instantiate
andWasmMsg::Execute
. - Merge messages and sub-messages.
- Change JSON representation of IBC acknowledgements (#975).
Setup
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
&&
&&
&&
&&
The cyberpunk_rust170.wasm
for
https://github.com/CosmWasm/cosmwasm/issues/1727 is built as follows
(non-reproducible):
RUSTFLAGS='-C link-arg=-s'
Testing
By default, this repository is built and tested with the singlepass backend. You
can enable the cranelift
feature to override the default backend with
Cranelift
Benchmarking
Using Singlepass:
cd packages/vm
cargo bench --no-default-features
Using Cranelift:
cd packages/vm
cargo bench --no-default-features --features cranelift
Tools
module_size
and module_size.sh
Memory profiling of compiled modules. module_size.sh
executes module_size
,
and uses valgrind's memory profiling tool (massif) to compute the amount of heap
memory used by a compiled module.
cd packages/vm
RUSTFLAGS="-g" cargo build --release --example module_size
./examples/module_size.sh ./testdata/hackatom.wasm
License
This package is part of the cosmwasm repository, licensed under the Apache License 2.0 (see NOTICE and LICENSE).