🚀 Deploying Your First Smart Contract: A Step-by-Step Guide

Why Deployment Matters

  • ⛓️ Bring your code onto the blockchain
  • 🌍 Make it accessible worldwide
  • 🔐 Lock in immutable logic

📦 Preparation Checklist

Tool Purpose
MetaMask Wallet & Network Connection
Remix IDE Contract Development
Sepolia Faucet Test ETH Acquisition

Step 1: Write Your Contract

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract SimpleStorage {
    uint256 storedData;
    
    function set(uint256 x) public {
        storedData = x;
    }
    
    function get() public view returns (uint256) {
        return storedData;
    }
}

Step 2: Compile in Remix

  1. Go to the "Solidity Compiler" tab
  2. Select compiler version 0.8.0+
  3. Check "Auto Compile"
  4. Verify no errors in console

Step 3: Configure Deployment

Environment

  • Injected Provider (MetaMask)
  • Web3 Provider (Local Node)

Network

  • Sepolia (Testnet)
  • Mainnet (Real ETH)

Step 4: Deploy & Verify

1. Click "Deploy" button
2. Confirm MetaMask transaction
3. Wait for block confirmation
4. Check contract address
5. Verify on Etherscan

Typical gas costs:

  • SimpleStorage: ~200,000 gas
  • ERC20 Token: ~1,500,000 gas

⚠️ Common Deployment Errors

Out of Gas Increase gas limit
Nonce Too Low Reset MetaMask account
Compiler Mismatch Check pragma version

🚀 Your Deployment Mission

  1. Deploy SimpleStorage to Sepolia
  2. Call set() with a number
  3. Verify the get() function
  4. Share your contract address below!

💡 Pro Tips

  • Always test on testnets first
  • Use Hardhat for complex deployments
  • Monitor gas prices at Etherscan Gas Tracker

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