spydy.eth

Day 79 – Solidity Development Was a bit busy with end-sem internals and practicals ✅ Added dynamic pricing — higher price for public users, lower for whitelisted users ✅ Implemented owner withdrawal of funds collected from NFT sales ✅ Enabled direct NFT transfer by owner

@panditdhamdhere What are the top 3 projects that should be on a fresher’s resume to increase the chances of getting hired?

Ask me anything about Blockchain.

@Abdulrahee84158 Lg

Smart Contract Security Day 13 Just wrapped up my first independent smart contract audit of TSwap... and I did it completely from scratch, without watching the Cyfrin Updraft tutorial! Found a Critical issue: The bonus reward that kicks in every 10 swaps breaks the core AMM constant product invariant (x * y = k). Because the bonus gets paid straight out of the pool reserves without updating the pricing math, anyone can repeatedly drain liquidity with tiny swaps. LPs slowly get drained while attackers walk away with extra value. The PoC is ridiculously simple but effective. Full 6-page report + clean PoC attached What do you think... have you spotted similar invariant-breaking bugs in AMMs? Or run into this during the Cyfrin course? Drop your thoughts below, I'd genuinely love feedback from the community! @PatrickAlphaC @_biggids @alexabelonix @tinchoabbate @CyfrinUpdraft @rosarioborgesi @Web3_Vinay @0xZulkifilu @SoloditOfficial

@Im_IrushiK Prod.

I'm a vibe coder, scare me with one word.

@Abdulrahee84158 ❤️

@0xspydy Well done 👏

🐉 Day 78 – Solidity Development Today I built and deployed an NFT project using ERC-721. ✅ Created an NFT smart contract using ERC-721 standard ✅ Deployed the project on the Sepolia testnet ✅ Implemented a whitelist (approved users) mechanism ✅ Only whitelisted users (approved by owner) can get early access to mint NFTs More functionality will be added tomorrow to further improve the project

@Web3_Vinay Lg

🦖 Pain is temporary. Quitting lasts forever Day 308 of learning Blockchain 📍 No dramatic story today. Just proof of what happens when you don’t stop. Another audit contest. Another payout. While most people chase motivation… I built a routine that works even when I feel nothing. There were days I was tired. Days I didn’t want to open the laptop. Days I questioned if any of this would pay off. Still showed up. That’s the difference. And yeah — same discipline in the gym. No perfect timing, no perfect energy… just consistency. Woke up half-asleep today… still seeing the pump in the body. 😂 That’s what happens when you stop negotiating with yourself. No noise. No shortcuts. Just work. Keep going.

🐉 Day 77 – Solidity Development Today I explored advanced concepts around NFTs and EVM internals. ✅ Learned what SVG is and how it’s used in NFTs ✅ Created a dynamic NFT collection ✅ Encoded SVGs to store fully on-chain ✅ Modified NFT metadata/images directly on-chain ✅ Deployed and interacted using Anvil (local blockchain) ✅ Explored advanced EVM opcodes and low-level calls ✅ Learned about EVM encoding & function selectors ✅ Understood how to verify transactions in MetaMask Diving deeper into low-level Solidity and fully on-chain NFT design.

@Abdulrahee84158 Lg buddy

Smart Contract Security Day 09 Another day learning smart contract security… and yeah, my brain is cooked 💀 Today I went from thinking “refund logic is simple” to realizing it can: – break contracts – drain funds – enable reentrancy attacks We walked through real examples and it finally clicked… It’s not just about writing a function that “works” , it’s about what happens when someone tries to break it. One wrong order of operations and suddenly: ETH is gone, state is messed up, and attackers are looping your contract. Wild how small mistakes turn into full exploits. I’m starting to see contracts less like code… and more like attack surfaces 👀 What bug made it click for you? @CyfrinUpdraft @PatrickAlphaC @panditdhamdhere @alexabelonix @_biggids @rosarioborgesi @Web3_Vinay @tinchoabbate @ForgeAudit @0xsadikbaba

@Tolu_dev571 @amishha06 Sure

@0xspydy @amishha06 Hey let’s connect 👨🏽‍💻

Builders in tech let’s connect

@RawlingsThought Lg i am also on the same lession

Seized the day to catch up on missed lessons due to the busyness of life. Today I: ✅ Started section 2 of Advanced Foundry. It defined NFTs as unique digital assets built with the ERC721 token standard. ✅ Started building my first ERC721 token. ✅ Smashed my quiz💯%.😎👨🏾‍💻

@Abdulrahee84158 Lg

Smart Contract Security 06 Congratulations to me 🎊 I just completed my first smart contract security review on Cyfrin… and it changed how I see code 🔍 We didn’t just “read contracts” - we broke them down like attackers: • Scoping (Etherscan, audit details, changelogs) • Recon (understanding context & code deeply) • Exploits (access control flaws, public data abuse) • Testing the protocol like an adversary Biggest lesson? Security isn’t about finding bugs… it’s about understanding how things can break. Still early, but I’m getting sharper ⚔️ @CyfrinUpdraft @PatrickAlphaC @alexabelonix @Web3_Vinay @rosarioborgesi @_biggids @yourweb3jobs @buildinpublic @ForgeAudit

🐉 Day 76 – Solidity Development Today I explored the world of NFTs and ERC-721. ✅ Learned about the ERC-721 standard ✅ Understood what NFTs are and how they work ✅ Explored IPFS for decentralized storage ✅ Uploaded and used data via IPFS ✅ Deployed an NFT smart contract on testnet ✅ Compared IPFS (Pinata) vs HTTP vs On-chain SVGs

🐉 Day 75 – Solidity Development Started diving into Advanced Foundry today. ✅ Learned how to create an ERC-20 token ✅ Explored deeper concepts in Foundry development workflow Moving towards more advanced smart contract development and standards.

🐉 Day 74 – Solidity Development Completed the Escrow project with full frontend integration. ✅ Built the UI for the Escrow project ✅ Successfully integrated frontend with the smart contract ✅ End-to-end functionality working smoothly

🐉 Day 73 – Solidity Development Continued building the Escrow Smart Contract with more advanced features. ✅ Added admin controls to cancel and release funds ✅ Implemented logic for automatic fund release once the seller completes delivery ✅ Used Chainlink Automation (Keepers) for triggering actions ✅ Deployed and tested the contract on the Sepolia testnet Project is getting closer to a real-world use case with automation and proper fund management.. #Web3 #Solidity #SmartContracts #Chainlink #Automation #Ethereum

🐉 Day 72 – Web3 Development Started the Escrow Smart Contract project today. ✅ Initial contract written ✅ Buyer can fund the escrow ✅ Buyer can cancel and retrieve funds if the seller doesn’t deliver Planning to add more business logic and functionality tomorrow. Step by step building a secure escrow system.

@whitecrow_dev Keep going

Day 9 of Learning #blockchain development I decided to take things slow today, so I revised & researched some concepts: solidity cheat codes, empty modifiers, constants... Today was really good, NEPA didn't disappoint atleast😅 #web3 #crypto #ethereum #solidity #buildinpublic

🐉 Day 71 – Web3 Development Today I did a deep dive into the Lottery Smart Contract project. ✅ Studied how all components work together ✅ Understood how Chainlink VRF is used for randomness ✅ Explored how performUpkeep and automation functions operate Taking time to fully understand the project and its mechanics before building more advanced projects.