Shubham Dev @Shubham91op

I promised, if #Ethererum pumps to $2800 I will give $10,000 $ETH to 5 people So as promised I will be giving away $10,000 to 5 person today. Rules: like, retweet, follow me 🔔 If you’re not following with bells, you will be disqualified. Proof will be posted in 24 hours

Day 35 of my #Blockchain journey Learned how to implement pausable contracts using OpenZeppelin’s Pausable module: Can temporarily halt functions like transfer, mint, etc Helpful in emergencies or upgrades Used whenNotPaused & pause()/unpause() with proper access control #Web3

Day 34 of my #Blockchain journey Studied access control patterns in smart contracts today: Used onlyOwner modifier with Ownable from OpenZeppelin Learned about Roles for more granular permissions Helps protect critical functions like mint(), pause(), withdraw() #BuildInPublic

Day 33 of my #Blockchain journey Looked into Integer Overflow & Underflow vulnerabilities in Solidity. Before Solidity 0.8.0, math operations could silently wrap Example: uint8 x = 255; x + 1 = 0 (overflow!) #Solidity #SmartContractSecurity #Web3 #BuildInPublic

Day 32 of my #Blockchain Today I explored reentrancy attacks Happens when an external call re-enters the same contract Can drain funds if state isn’t updated before sending ETH Solved using checks-effects-interactions + ReentrancyGuard #SmartContractSecurity #BuildInPublic

Day 31 of my #Blockchain journey Started exploring smart contract security today! Looked into common risks: reentrancy, overflows, access control Studied how require(), modifiers, and checks-effects-interactions pattern help #Solidity #SmartContracts #Web3 #BuildInPublic

Day 30 of my #Blockchain journey Wrapped up my first end-to-end dApp MVP this month! Smart contracts (ERC-20 & NFT) React frontend with Ethers.js MetaMask integration + testnet deployment From zero to deployed dApp in 30 days. Grateful for every line of code #Web3 #Solidity

Day 29 of my #Blockchain journey Today I implemented wallet connect status in my dApp! Shows “Connected” or “Connect Wallet” based on user state Listens to account & network changes in real time Helps users understand when they’re ready to interact #MetaMask #BuildInPublic

Day 28 of my #Blockchain journey Built a simple network check + switch feature using MetaMask & Ethers.js! Warns if user is on the wrong chain Auto-prompts to switch to correct network Added custom chain config for testnets #Web3 #MetaMask #Ethersjs #BuildInPublic

Day 27 of my #Blockchain journey Learned how to handle network switching in MetaMask: Detected if user is on the correct network Prompted switch using wallet_switchEthereumChain Can even add custom networks like Avalanche or Polygon! #Web3 #MetaMask #Ethersjs #BuildInPublic

Day 26 of my #Blockchain journey Explored MetaMask integration today: Connected wallet with window.ethereum.request({ method: 'eth_requestAccounts' }) Detected account changes Read balances using Ethers.js #Web3 #MetaMask #BuildInPublic #Solidity

Day 25 of my #Blockchain journey Today I integrated my smart contract with a React frontend using Ethers.js! Connected MetaMask Fetched on-chain data using provider & contract Triggered transactions right from the UI #Web3 #Ethersjs #Solidity #BuildInPublic

Day 24 of my #Blockchain journey Learned how to connect smart contracts to the frontend today using Ethers.js! Loaded contract ABI & address Used ethers.Contract() to call functions Now I can interact with the blockchain right from my UI #Ethersjs #Solidity #BuildInPublic

Day 23 of my #Blockchain journey Deployed my first ERC-721 NFT today using OpenZeppelin! Inherited from ERC721 & ERC721URIStorage Minted NFTs with metadata (images hosted on IPFS) Every token has a unique ID & metadata link #Solidity #NFT #BuildInPublic #Web3

Day 22 of my #Blockchain journey Today I explored ERC-721 tokens — the standard for NFTs. Each token is unique and has its own ID Built with functions like ownerOf() & safeTransferFrom() Perfect for art, collectibles, gaming assets, and more #Solidity #NFTs #BuildInPublic

Day 21 of my #Blockchain journey Deployed my first ERC-20 token today using OpenZeppelin! Used ERC20 contract from OpenZeppelin Set name, symbol & initial supply Deployed via Remix in just a few minutes Wild to see my own token live on testnet #Solidity #Web3 #BuildInPublic

Day 20 of my #Blockchain journey Today I explored ERC-20 tokens — the standard for fungible tokens on Ethereum. Common functions: totalSupply(), balanceOf(), transfer() Every major token (like USDC, DAI) follows this spec Interfaces + standards = interoperability in Web3 #Web3

Day 19 of my #Blockchain journey Learned about interfaces in Solidity today: Interfaces define function signatures without implementations Let contracts talk to other contracts Key to building modular & upgradable dApps #Solidity #Web3 #BuildInPublic

Day 18 of my #Blockchain journey Dived into inheritance in Solidity today! One contract can inherit from another using is Great for reusing logic Think of it like object-oriented programming — for smart contract #Solidity #Web3 #BuildInPublic

Day 17 of my #Blockchain journey Today I learned about constructor functions in Solidity: constructor() runs once when the contract is deployed Great for setting owner, initial values, or config After deployment, it's gone forever #Solidity #Web3 #BuildInPublic