Quick Start

In this guide we will deploy a simple Flipper smart contract onto Reef chain.

The guide is broken into 3 parts:

  • setting up the Reef development node
  • setting up the smart contract development environment
  • deploying and running your first smart contract

Setting up a development node

Requirements

Reef chain is written in Rust. A basic familiarity with Rust tooling is required.

Clone the repo

git clone --recursive https://github.com/reef-defi/reef-chain

Install Rust

If you don’t have Rust already, you can install it with:

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

You can install the development compiler and the toolchain with:

make init

Start a development node

The make run command will launch a temporary node and its state will be discarded after you terminate the process.

To run the temporary (development) node run:

make run

You should see an output like this when the Reef chain starts producing blocks.

(Optional) Run a persistent single-node chain

Use the following command to build the node without launching it:

make build

This command will start the single-node development chain with persistent state:

./target/release/reef-node --dev

Purge the development chain’s state:

./target/release/reef-node purge-chain --dev

Deploy a smart contract

Requirements

The Reef chain smart contracts are written in Solidity. We can use yarn to install and run packages required for deploying and running Solidity smart contracts on Reef chain. In the following example we use our plugin for a Hardhat development environment to deploy and interact with the contract.

Clone the examples repo

git clone https://github.com/reef-defi/hardhat-reef-examples

Install the dependencies

yarn

Deploy the contract

We are going to pick a simple Flipper contract for our demo, but feel free to try out other examples as well.

npx hardhat run scripts/flipper/deploy.js

Interact with a smart contract

After the contract is deployed you can interact with the contract. In our Flipper example the value in the Flipper contract can be flipped by calling:

npx hardhat run scripts/flipper/flip.js

There are multiple ways to interact with the contract. On the lowest level, we can use a web3 client such as bodhi.js (TypeScript). We recommend using our hardhat-reef plugin, which abstracts many of the intricacies.

Here is how we can call a function on our smart contract in TypeScript:

async function main() {
  const flipperAddress = "0x0230135fDeD668a3F7894966b14F42E65Da322e4";

  await hre.reef.getContractFactory("Flipper");

  const artifact = await hre.artifacts.readArtifact("Flipper");
  const flipper = new ethers.Contract(
    flipperAddress,
    artifact.abi,
    await hre.reef.getSigner()
  );

  // Call flip()
  console.log("Current value:", await flipper.get());
  await flipper.flip();
  console.log("New value after flip():", await flipper.get());
}

On the high level we can use a UI, such as polkadot.js, a block explorer or a custom UI for a specific contract.

Next steps

Congratulations. You now have a running development node with the first smart contract. You and now are ready to start building your first DeFi app.