Deploy a Contract

Robinhood Chain is fully EVM-compatible, so smart contracts written in Solidity or Vyper deploy without modification using standard Ethereum tooling. This guide covers deploying a simple contract with Foundry or Hardhat — pick whichever you prefer.

Prerequisites

Before you begin, you'll need:

A wallet with ETH on Robinhood Chain for gas — see Add network to your wallet.
The network details below.

Property	Mainnet	Testnet
Network	Robinhood Chain	Robinhood Chain Testnet
Chain ID	4663	46630
RPC URL	`https://rpc.mainnet.chain.robinhood.com`	`https://rpc.testnet.chain.robinhood.com`
Block Explorer	robinhoodchain.blockscout.com	explorer.testnet.chain.robinhood.com

We recommend deploying to testnet first. The steps below target mainnet — to deploy to testnet instead, use the testnet values above: set RH_RPC_URL to the testnet RPC, use chain ID 46630, and verify against https://explorer.testnet.chain.robinhood.com/api/.

Security note: Never commit a real private key. Use an environment variable, and prefer a throwaway deployer key for testing.

Deploy with Foundry

1. Install Foundry

If Foundry is already installed, skip this step. Run the installer and follow the prompts:

# Install foundryup
curl -L https://foundry.paradigm.xyz | bash
 
# Install forge, anvil, cast, and chisel
foundryup

2. Create a project

# Initialize a new project
mkdir rh-deploy && cd rh-deploy
forge init

3. Create a contract

Create src/HelloRobinhood.sol with the following content:

// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.13;
 
contract HelloRobinhood {
    function hello() external pure returns (string memory) {
        return "Hello, Robinhood Chain!";
    }
}

4. Deploy

# Set environment variables
export PRIVATE_KEY=0x<your_private_key>
export RH_RPC_URL=https://rpc.mainnet.chain.robinhood.com
 
# Deploy contract
forge create HelloRobinhood \
  --rpc-url $RH_RPC_URL \
  --private-key $PRIVATE_KEY \
  --broadcast

5. Verify on Block Explorer

# Verify the contract on Blockscout
forge verify-contract <contract_address> \
  src/HelloRobinhood.sol:HelloRobinhood \
  --chain-id 4663 \
  --rpc-url $RH_RPC_URL \
  --verifier blockscout \
  --verifier-url https://robinhoodchain.blockscout.com/api/

After verification, view your contract at https://robinhoodchain.blockscout.com/address/<contract_address>.

Deploy with Hardhat

1. Create a project

Initialize your environment and Hardhat project:

# Initialize project and install Hardhat
mkdir rh-deploy && cd rh-deploy
npm init -y
npm install --save-dev hardhat
npx hardhat init

2. Configure Robinhood Chain

Update hardhat.config.js with the network settings:

require("@nomicfoundation/hardhat-toolbox");
 
module.exports = {
  solidity: "0.8.13",
  networks: {
    robinhood: {
      url: process.env.RH_RPC_URL,
      chainId: 4663,
      accounts: [process.env.PRIVATE_KEY],
    },
  },
  etherscan: {
    apiKey: { robinhood: "empty" },
    customChains: [
      {
        network: "robinhood",
        chainId: 4663,
        urls: {
          apiURL: "https://robinhoodchain.blockscout.com/api",
          browserURL: "https://robinhoodchain.blockscout.com/",
        },
      },
    ],
  },
};

Set your environment variables before proceeding:

export PRIVATE_KEY=0x<your_private_key>
export RH_RPC_URL=https://rpc.mainnet.chain.robinhood.com

3. Create a contract

Create contracts/HelloRobinhood.sol:

// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.13;
 
contract HelloRobinhood {
    function hello() external pure returns (string memory) {
        return "Hello, Robinhood Chain!";
    }
}

4. Compile and Deploy

Create scripts/deploy.js and then execute the deployment command:

const hre = require("hardhat");
 
async function main() {
  const contract = await hre.ethers.deployContract("HelloRobinhood");
  await contract.waitForDeployment();
  console.log("Deployed to:", await contract.getAddress());
}
 
main().catch((error) => {
  console.error(error);
  process.exitCode = 1;
});

# Compile and run deployment script
npx hardhat compile
npx hardhat run scripts/deploy.js --network robinhood

5. Verify on Block Explorer

# Verify the contract on Blockscout
npx hardhat verify --network robinhood <contract_address>

After verification, view your contract at https://robinhoodchain.blockscout.com/address/<contract_address>.