Build on Velana Testnet

mkdir velana-hello && cd velana-hello
npm init -y
npm install --save-dev hardhat@^2 @nomicfoundation/hardhat-toolbox@^5
npx hardhat init        # choose "Create a JavaScript project"
# put Greeter.sol in contracts/, the config and deploy script below in place, then:
export VELANA_TEST_KEY=0x...   # key of a NEW, empty test wallet only. Never a wallet with real funds.
npx hardhat run scripts/deploy.js --network velana

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

module.exports = {
  solidity: { version: "0.8.24", settings: { evmVersion: "cancun" } },
  networks: {
    velana: {
      url: "https://velanachain.com/rpc",
      chainId: 484148,
      accounts: process.env.VELANA_TEST_KEY ? [process.env.VELANA_TEST_KEY] : [],
    },
  },
};

// scripts/deploy.js
const hre = require("hardhat");

async function main() {
  const greeter = await hre.ethers.deployContract("Greeter");
  await greeter.waitForDeployment();
  const addr = await greeter.getAddress();
  console.log("Greeter deployed to", addr);
  console.log("Explorer: https://velanachain.com/explorer/#/address/" + addr);
  console.log("Greeting:", await greeter.greeting());
}

main().catch((e) => { console.error(e); process.exitCode = 1; });

[profile.default]
src = "src"
out = "out"
libs = ["lib"]
solc_version = "0.8.24"
evm_version = "cancun"

[rpc_endpoints]
velana = "https://velanachain.com/rpc"

# 1. Install Foundry (https://getfoundry.sh) and start a project
curl -L https://foundry.paradigm.xyz | bash && foundryup
forge init velana-hello && cd velana-hello

# 2. Put Greeter.sol in src/ and the foundry.toml above in the project root

# 3. Use a NEW, empty test wallet only. Import its key (you are prompted; it is stored encrypted)
cast wallet import velana-test --interactive
cast wallet address --account velana-test     # copy this address into the faucet

# 4. Check the network, then deploy
cast chain-id --rpc-url velana                # 484148
forge create src/Greeter.sol:Greeter --rpc-url velana --account velana-test --broadcast

# 5. Read it back
cast call <DEPLOYED_ADDRESS> "greeting()(string)" --rpc-url velana