This is a basic implementation of a cw20 staking contract. Staked tokens can be unbonded with a configurable unbonding period. Staked balances can be queried at any arbitrary height by external contracts.
You will need Rust 1.58.1+ with wasm32-unknown-unknown target installed.
You can run unit tests on this via:
cargo test
Once you are happy with the content, you can compile it to wasm via:
RUSTFLAGS='-C link-arg=-s' cargo wasm
cp ../../target/wasm32-unknown-unknown/release/stake_cw20.wasm .
ls -l stake_cw20.wasm
sha256sum stake_cw20.wasm
Or for a production-ready (optimized) build, run a build command in the the repository root: https://github.com/CosmWasm/cw-plus#compiling.