30 Seconds of TypeScript

Ethereum development focuses on creating Decentralized Applications (DApps) and smart contracts that execute on the Ethereum blockchain. Key architectural components include:

• Smart Contracts: Self-executing code that automates processes and enforces agreements. Common languages used include Solidity, Vyper, and LLL.
• Decentralized Applications (DApps): Applications that use smart contracts for backend logic and provide a frontend via web or mobile interfaces to ensure trustless and transparent functionality.
• Blockchain Fundamentals: Development requires knowledge of consensus mechanisms, transaction processing, cryptographic principles, and decentralized network structures.

Deno is a modern, secure runtime for JavaScript and TypeScript built in Rust and powered by the V8 engine. Key features include:

• Security: Secure by default; file, network, and environment access must be explicitly enabled.
• TypeScript Support: Native support for TypeScript without external transpilation.
• Deployment: Distributed as a single executable file.
• Built-in Tooling: Includes a code formatter (deno fmt) and a dependency inspector (deno info).
• Standard Library: Provides a set of audited standard modules available at deno.land/std.

Ethereum's architecture supports the creation of custom tokens and protocols. Key standards include:

• ERC-20: The de facto standard for creating fungible tokens.
• ERC-721: The standard used for creating unique, non-fungible tokens (NFTs). These standards enable the development of Decentralized Finance (DeFi) protocols and Decentralized Exchanges (DEXs).

Decentralized Applications (DApps) use smart contracts as their backend logic to provide transparent and trustless functionality. DApps run on a decentralized network of nodes rather than a central server. Common use cases include:

• Finance (DeFi): Lending, borrowing, and automated investment strategies.
• Marketplaces: Non-fungible token (NFT) trading.
• Exchanges: Decentralized exchanges (DEXs).
• Supply Chain: Tracking provenance of goods and automating payments.
• Governance: Digital identity verification and voting systems.

Ethereum is a decentralized platform designed as a "world computer" for executing smart contracts and building decentralized applications (DApps). Its architecture is based on four core pillars:

1. Decentralization: The network is maintained by a global set of nodes that collectively validate transactions, ensuring no single entity has control.
2. Smart Contracts: Self-executing agreements with predefined terms written in code, allowing for the automation of processes and trustless interactions without intermediaries.
3. Ethereum Virtual Machine (EVM): A Turing-complete, sandboxed runtime environment that executes smart contracts securely and deterministically across all network nodes.
4. Ether (ETH): The native cryptocurrency used to pay for transaction fees (gas) and smart contract execution, and to incentivize network security through staking or mining.

The EVM is a decentralized, deterministic virtual computer that runs on every node in the Ethereum network. It uses a stack-based architecture to execute smart contract bytecode. Its primary components include:

• Stack: A last-in, first-out (LIFO) data structure used to store operands and intermediate results for arithmetic, logical, and control flow instructions.
• Memory: A linear array of 32-byte words used for temporary data storage during contract execution.
• Storage: A persistent, contract-specific storage space used for state variables that must persist across multiple contract invocations.
• Program Counter (PC): Tracks the current position in the bytecode sequence to determine the next instruction to execute.