Development Environment Setup

node --version   # v18.0.0+
git --version    # 2.20.0+

await window.ethereum.request({
  method: "wallet_addEthereumChain",
  params: [
    {
      chainId: "0x7a9",
      chainName: "Selendra Mainnet",
      rpcUrls: ["https://rpc.selendra.org"],
      nativeCurrency: { name: "Selendra", symbol: "SEL", decimals: 18 },
      blockExplorerUrls: ["https://explorer.selendra.org"],
    },
  ],
});

mkdir my-project && cd my-project
npm init -y
npm install --save-dev hardhat @nomicfoundation/hardhat-toolbox dotenv
npx hardhat init

require("dotenv").config();
require("@nomicfoundation/hardhat-toolbox");

module.exports = {
  solidity: "0.8.19",
  networks: {
    selendra: {
      url: "https://rpc.selendra.org",
      chainId: 1961,
      accounts: process.env.PRIVATE_KEY ? [process.env.PRIVATE_KEY] : [],
    },
  },
};

PRIVATE_KEY=your_private_key_here

npx hardhat compile
npx hardhat test
npx hardhat run scripts/deploy.js --network selendra

# Install Rust 1.79.0
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
rustup default 1.79.0
rustup target add wasm32-unknown-unknown
rustup component add rustfmt clippy rust-src

# Install cargo-contract
cargo install cargo-contract --version 3.2.0
cargo contract --version

# Create project
cargo contract new my-contract
cd my-contract
cargo contract build
cargo test

git clone https://github.com/selendra/selendra.git
cd selendra
git submodule update --init --recursive
cargo build --release
./target/release/selendra-node --dev --tmp

{
  "chainId": "0x7a9",
  "chainName": "Selendra Local",
  "rpcUrls": ["http://localhost:9944"],
  "nativeCurrency": { "name": "Selendra", "symbol": "SEL", "decimals": 18 }
}

module.exports = {
  networks: {
    local: {
      url: "http://localhost:9944",
      chainId: 1961,
      accounts: {
        mnemonic:
          "bottom drive obey lake curtain smoke basket hold race lonely fit walk",
      },
    },
  },
};

npx hardhat test

cargo test

curl -X POST -H "Content-Type: application/json" \
  --data '{"jsonrpc":"2.0","method":"eth_chainId","params":[],"id":1}' \
  http://localhost:9944
# Expected: {"jsonrpc":"2.0","result":"0x7a9","id":1}