--- title: "Kelvin Ajayi (@scriptwiz) | Hashnode" description: "Kelvin Ajayi (@scriptwiz) writes on Hashnode. Read their latest articles and follow their work." url: "https://hashnode.com/@scriptwiz" --- @scriptwiz # Kelvin Ajayi @scriptwiz · Joined July 2025 ### [Understanding Ethereum: EVM, Blocks, Gas, Accounts, and Transactions](https://introduction-to-ethereum.hashnode.dev/understanding-ethereum-evm-blocks-gas-accounts-and-transactions?utm_source=hashnode&utm_medium=feed) Ethereum is more than just a digital currency. It's a platform that lets anyone build decentralized applications (dApps) and smart contracts. If you’re new to Ethereum, understanding the essentials EVM, blocks, gas, accounts, and transactions will he... 5 min read · [introduction-to-ethereum.hashnode.dev](https://introduction-to-ethereum.hashnode.dev/understanding-ethereum-evm-blocks-gas-accounts-and-transactions?utm_source=hashnode&utm_medium=feed) [Jul 17, 2025](https://hashnode.com/posts/understanding-ethereum-evm-blocks-gas-accounts-and-transactions/6878f264839eb362ca8fdfe6) ### [Introduction to Web 3.0 & Ethereum](https://introduction-to-ethereum.hashnode.dev/introduction-to-web-30-and-ethereum?utm_source=hashnode&utm_medium=feed) What is Web 3.0? Web 3.0 is the next phase of the internet, built on decentralized technology like blockchains. Unlike Web 2.0 where big companies own your data, Web 3.0 lets you own your own data, interact directly with others, and use decentralized... 9 min read · [introduction-to-ethereum.hashnode.dev](https://introduction-to-ethereum.hashnode.dev/introduction-to-web-30-and-ethereum?utm_source=hashnode&utm_medium=feed) [Jul 12, 2025](https://hashnode.com/posts/introduction-to-web-30-and-ethereum/687266a136dd4b997682dbd5) ### [Cryptography in Ethereum: Keys, Addresses, and Hashes](https://introduction-to-ethereum.hashnode.dev/cryptography-in-ethereum-keys-addresses-and-hashes?utm_source=hashnode&utm_medium=feed) What Is Cryptography? Cryptography is the science that keeps data safe and private across open networks. In Ethereum, cryptography is used for digital signatures, generating addresses, and ensuring the authenticity and integrity of transactions. Unli... 3 min read · [introduction-to-ethereum.hashnode.dev](https://introduction-to-ethereum.hashnode.dev/cryptography-in-ethereum-keys-addresses-and-hashes?utm_source=hashnode&utm_medium=feed) [Jul 10, 2025](https://hashnode.com/posts/cryptography-in-ethereum-keys-addresses-and-hashes/68703da84d42b31fefc2429f) ### [Proof of Stake on Ethereum: Rewards, Penalties, and Securing the Network](https://introduction-to-ethereum.hashnode.dev/proof-of-stake-on-ethereum-rewards-penalties-and-securing-the-network?utm_source=hashnode&utm_medium=feed) Proof of Stake Rewards and Penalties Proof of Stake(PoS) is a consensus mechanism used by Ethereum to secure the network. Validators are responsible for proposing and adding transactions to new blocks. In PoS, participants lock up their ETH called st... 3 min read · [introduction-to-ethereum.hashnode.dev](https://introduction-to-ethereum.hashnode.dev/proof-of-stake-on-ethereum-rewards-penalties-and-securing-the-network?utm_source=hashnode&utm_medium=feed) [Jul 9, 2025](https://hashnode.com/posts/proof-of-stake-on-ethereum-rewards-penalties-and-securing-the-network/686ef9322238aa1c2b8e3ec5) ### [Understanding Ethereum: Wallets, Currency, Networks, and Smart Contracts.](https://introduction-to-ethereum.hashnode.dev/understanding-ethereum-wallets-currency-networks-and-smart-contracts?utm_source=hashnode&utm_medium=feed) What Are Wallets in Blockchain? A wallet in blockchain is a tool (software, hardware, or even paper) that lets users manage their cryptocurrencies and interact with the blockchain. At its core, a wallet holds your private keys and cryptographic secre... 3 min read · [introduction-to-ethereum.hashnode.dev](https://introduction-to-ethereum.hashnode.dev/understanding-ethereum-wallets-currency-networks-and-smart-contracts?utm_source=hashnode&utm_medium=feed) [Jul 9, 2025](https://hashnode.com/posts/understanding-ethereum-wallets-currency-networks-and-smart-contracts/686e51d38ca9050d1b87ea5c)