contracts for subDAO, using ink! 3.0.0.0-rc4.

reference here.

rustup default stable
rustup update
rustup update nightly
rustup component add rust-src --toolchain nightly
rustup target add wasm32-unknown-unknown --toolchain nightly

As a pre-requisite for the tool you need to install the binaryen package, which is used to optimize the WebAssembly bytecode of the contract.

binaryen version must be >=99.

git submodule init
git submodule update

Please use version 0.11!

cargo install cargo-contract --vers ^0.11 --force --locked

cargo +nightly contract build

./build.sh

the ABI, wasm, and contract files are copied in ./release dir.

visit polkadot.js apps, and connect subDAO node. then Develpoer->Contract->upload WASM.