contracts hub

This repository is used to show case how to build smart contracts on laguna-chain-devnet. It also contains a integration tests with the node to ensure that all examples are compatible on chain.

prepare contracts

laguna-chain uses pallet-contracts under the hood, which means you'll be able to use all of the supported source langues ink, solang or ask that can be compiled in wasm.

compile solidity contracts with solang

You'll need to first obtain the solang compiler, which should be available for you if you can access laguna-chain's private docker registry:

docker run --rm -it us-docker.pkg.dev/laguna-chain/laguna-chain/solang:ink_metadata --help

this will be fixed once it's merged upstream, and eventually you can get the official binary and run:

solang compile $ARGS

compile solidity contracts

To compile a contract, use this command:

docker run --rm -it -v $(pwd)/$HOST_DIR:/$MOUNT_PATH_IN_CONTAINER us-docker.pkg.dev/laguna-chain/laguna-chain/solang:ink_metadata compile --target substrate $MOUNT_PATH_IN_CONTAINER/$CONTRACT_PATH.sol -o $MOUNT_PATH_IN_CONTAINER/$OUTPUT_PATH

Afer this you'll recieve two file at your specified path: $CONTRACT.contract, and $CONTRACT.wasm, which the first one is the ABI bundle with the wasm code inside it. And a standalone wasm file.

interact with contracts through a front-end

Once you have prepared your ABI bundle and wasm blob, you can use either of the methods to deploy to laguna-chain-devnet:

1. polkadot.js/apps contracts tab(https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Flaguna-chain-dev.hydrogenx.tk%3A443#/contracts)
2. use contracts-ui(https://contracts-ui.substrate.io/?rpc=wss://laguna-chain-dev.hydrogenx.tk:443)

interact with contracts through a cli

TBD: javscript with polkadot.js

TBD: rust with subxt

---

integration tests

Currently a subxt integration tests is maintained under this repo with the package subxt-tests.

The test can be run at the subxt directory:

cd subxt-tests
ENDPOINT=$WS_ENDPOINT_DEV_NET cargo test -- --test-threads=1

For example, to run it against a local devnet you can try:

docker run -it --rm -p 9944:9944  us-docker.pkg.dev/laguna-chain/laguna-chain/laguna-chain:dev --dev --unsafe-ws-external
ENDPOINT="ws:127.0.0.1:9944" cargo test -- --test-threads=1

For example, to run it against a live devnet you can try:

docker run -it --rm -p 9944:9944  us-docker.pkg.dev/laguna-chain/laguna-chain/laguna-chain:dev --dev --unsafe-ws-external
ENDPOINT="wss://laguna-chain-dev.hydrogenx.tk:443" cargo test -- --test-threads=1