0xBarnabas @GasFeeDreams

@JB_Xponential @rosarioborgesi so using transfer is the best practice? and simple....?

@rosarioborgesi True, but saying the hack “wouldn’t work” depends on implementation. call prevents forced reverts, but if unchecked, it opens the door to inconsistent state and logic flaws.

📌 Transfer vs Call — what actually reverts? When sending ETH: 🔹 transfer ❌ reverts automatically on failure 🔹 call ⚠️ returns false, does NOT revert 💣 Hack Example — King of the Ether If they had used call instead of transfer, the hack wouldn’t work 👇

@Olaniyi_dev Keep going👏

Class is in session. A wise man once told me the best way to learn is by doing. My github is looking very good these days. 🤍

@timsilva112 Are you sure you understood all that at once?

Today's #solidity grind:Merkle Airdrop contd ✅signature standards ✅ took a quick quiz ✅Decoding ECDSA #signatures ✅Transaction types intro ✅Blob #Transactions ✅Understanding Type 113 transaction ✅Took another quick quiz ✅Implementing Signatures ✅Another quiz 😪

@timsilva112 Are you sure you understood all that at once? For today?

🐉 ✅Day 95 Mastering Blockchain Today humbled me…hard 😤 Spent Hours debugging a Foundry issue. Not my code → dependency mismatch. File didn’t exist in that version. 💡Lesson: verify versions. Web3 bugs ≠ always your code. Painful…but I leveled up 🚀 #web3 #cyfrinupdraft

What is ERC-777? -An advanced token standard designed to improve ERC20 token. Key Features: -Backward Compatibility -Hooks(send/receive triggers) -Operator system -Better contract interaction Why Not widely used? -Reentrancy risks✳️ -ERC20 -> dominant -Industry supports ERC20

🐢 Day 94 Mastering Blockchain ✅Advanced Foundry -Repeated validateUserOperation function -Imported & reviewed IEntryPoint.sol >=0.7.5 before implementing it on ethAccountAbstraction.sol ✅Chainlink Fundamentals -ERCs & EIPs review(ERC-777) -Libraries & Inheritance review

@thekiro0 This is awesome and super great🫡 Keep the fire burning mate.

1 week of learning crypto from zero. Here’s what I covered 👇 Day 1 — Blockchain Day 2 — Crypto Transaction Day 3 — After you send crypto Day 4 — HASH Day 5 — Why blockchain is hard to hack Day 6 — Miners vs Validators Day 7 — Consensus 7 days. 7 concepts. Day 8 today👀

🪲 Day 93 Learning Blockchain ✅Account Abstraction -Deth.net intro -PackedUserOperation -Validating UserOp ✅Chainlink Fundamentals Looked at : -Chainlink services : Data feeds(types of data to fetch)&Price feeds -Reviewed DevHub docs & Chainlink docs for deeper understanding

@ChidiebereEzen4 Wow This is great

Day 77. Audited my 12th smart contract today. Found a vulnerability I haven't seen before a buyer setting themselves as arbitrator in an escrow contract, then ruling in their own favor during a dispute. The seller delivers. The buyer gets their money back. The arbitrator never questions it. Because the buyer IS the arbitrator. One missing check. Full protocol trust broken. This is why smart contract security exists. 12 contracts. 4 months. Still building.

@ChidiebereEzen4 Thanks aton😁

@BarnabyChainDev Congratulations Welcome onboard

🐊 Day 92 Mastering Blockchain . Part A ✅Account Abstraction -Code Overview(already loving it) -Ethereum minimal Account Abstraction setUp ✅Chainlink Fundamentals -Perused notes: Introduction + Oracles & Data feeds -Chainlink solves Oracle Problem.(Off-chain data ->OnChain)

🐊 Part B ✅Made a Github commit -proposed test file naming convention change ✅Lottery Smart Contract - Successfully deployed HelperConfig.s.sol to both Local Anvil & default Anvil private key. -Though no Transactions broadcasted because I need to implement DeployRaffle.s.sol

@whitecrow_dev @CyfrinUpdraft Keep it up mate😃

I started taking the Solidity smart contract development course on @CyfrinUpdraft today. I learned about ABI, using AI as a study buddy and inheritance in Solidity (not done yet) All in all, today is shaping up to be a good day. ...before I forget, Day 1 of #100daysofcode

@0xspydy @CiaraNightingal @PatrickAlphaC Thanks buddy😃

@BarnabyChainDev @CiaraNightingal @PatrickAlphaC Gg buddy

🐍 Day 91 Mastering Blockchain ✅Account Abstraction(EIP-4337) -Introduction- In the Blockchain Basics course @CiaraNightingal said is key to mainstream adoption 4 new DeFI users eg(baby @PatrickAlphaC) ✅Reviewed & rebuit HelperConfig script on Lottery Contract & solved bugs

@thekiro0 @CiaraNightingal @PatrickAlphaC 😃very powerful. Though when you get used to it it's normal stuff😁

@BarnabyChainDev @CiaraNightingal @PatrickAlphaC This is powerful!

@abrahamonchain Wow😃I now understand

Do you know that an Auditor is different from a Security Researcher? Auditors secure contracts before deployment. Security Researchers secure contracts after deployment. Both roles are critical to maintaining security in the Web3 ecosystem. Read more @iamabraham/web3-security-careers-smart-contract-auditors-vs-security-researchers-d8361759011a?source=user_profile_page---------4-------------bff1acbd70c1----------------------" target="_blank" rel="nofollow noopener">medium.com/@iamabraham/we…

@thekiro0 @CyfrinUpdraft Sure, you're welcome. I'd like to visit Ukraine someday🙂

@BarnabyChainDev @CyfrinUpdraft That's nice to see, I completely agree with you. Maybe I'll visit Kenya someday😅

🦎 Day 90 Mastering Blockchain Tech ✅Upgradeable Smart Contracts DONE📌🥳 - Learned that when deploying proxy contracts you MUST initialize them. - Added two new tests & passed(To review this soon for deep learning) ✅Blockchain Basics DONE, had done the exam some months ago🥳