Rust runtime for OP_NET VM

• Rust contract is able to run under op-vm
• The interface is defined by btc-runtime
• Library is tested like: opnet-unit-test
• Reference contract: OP_20

Compilation

rustup install nightly # ensure that you have last nightly version
cargo build --release -p example --target wasm32-unknown-unknown
wasm-opt -O2 -Oz --strip-debug --strip-dwarf --dce --disable-multimemory --disable-fp16 --disable-mutable-globals --disable-gc --disable-multivalue --disable-nontrapping-float-to-int --disable-threads --mvp-features --remove-unused-module-elements ./target/wasm32-unknown-unknown/release/example.wasm -o ./rust.wasm

Testing

With opnet-unit-test on wasm interpreter

cp ./rust.wasm ../opnet-unit-test/bytecode/rust.wasm
node build/tests/rust.js

Without wasm32 runtime

cargo test --target x86_64-unknown-linux-gnu

Size (outdated)

• Compiled code from moto library: 24KB (24689)
• Unoptimized code from current Rust library: 45KB (45584)
• Optimized code with wasm-opt: 33KB (33573)

Structure

• ./src/ - Library providing the interface and helper functions for contract interaction
• ./example/ - Sample smart contract, similar to contract used in unit tests