Crypto Fundamentals
Explore the foundational concepts of Web3. Understand blockchain mechanics, crypto slang, technical terms, market cycles, and advanced network architecture.
What Is the Solana Virtual Machine (SVM) and How Does It Work?
The Solana Virtual Machine (SVM) is high-performance execution infrastructure that powers smart contracts on Solana and compatible blockchains. By separating program logic from state data and utilizing parallel transaction processing, the SVM enables ultra-fast execution, low latency, and high scalability for decentralized applications.
What Is the Ethereum London Hard Fork? How EIP-1559 Changed Gas Fees?
The Ethereum London hard fork was a major network upgrade activated on August 5, 2021, at block 12,965,000, best known for introducing EIP-1559 to overhaul transaction fees. By implementing a protocol-calculated base fee that gets burned alongside an optional priority fee (tip) for validators, London made gas fee estimation more predictable and tied ETH token supply directly to network usage. The upgrade comprised five total EIPs that also reduced gas refunds, reserved EVM bytecode prefixes, and delayed the difficulty bomb to prepare Ethereum for its eventual transition to proof-of-stake.
What Is Proof of Stake (PoS) and How Does It Work?
Proof of Stake (PoS) is an energy-efficient blockchain consensus mechanism where validators lock up cryptocurrency collateral to verify transactions, propose blocks, and maintain overall network security. In exchange for securing the ledger and ensuring reliable uptime, participants earn staking rewards, while malicious behavior or downtime can result in penalties like slashing.
What Is ERC-1155? How Ethereum's Multi-Token Standard Works
ERC-1155 is a versatile multi-token standard on Ethereum and EVM-compatible networks that enables a single smart contract to manage fungible tokens, non-fungible tokens (NFTs), and semi-fungible assets simultaneously. Designed to streamline blockchain applications like web3 gaming and digital collectibles, ERC-1155 supports batch transfers and unified balance tracking to reduce network transactions and gas costs. While offerring superior efficiency over single-purpose standards like ERC-20 and ERC-721, it requires careful contract verification due to shared implementation risks and broad operator permissions.
What Is a Parallel EVM and How Does Parallel Execution Work?
A Parallel EVM (Ethereum Virtual Machine) is a high-performance execution engine that processes independent smart contract transactions concurrently across multiple CPU cores while maintaining Ethereum’s deterministic ledger state and developer compatibility. By replacing traditional single-threaded processing with optimistic concurrency, Parallel EVM networks like Monad and Sei significantly increase blockchain throughput and reduce congestion without breaking existing Solidity contracts or tooling.
What Is a Layer 3 Blockchain Network and How Does It Work?
A Layer 3 (L3) blockchain network is a highly customizable, application-specific scaling solution built on top of a Layer 2 (L2) parent chain rather than directly settling on Layer 1 (L1) blockchains like Ethereum. By leveraging L2 infrastructure for settlement and data availability, L3 networks enable hyper-scalable execution, lower transaction fees, custom gas tokens, and dedicated block space for Web3 gaming, enterprise, and privacy-focused applications.
What Is a Layer 1 Blockchain and How Does It Work?
A Layer 1 (L1) blockchain is a foundational, standalone network that executes transactions, enforces consensus, and provides final settlement and security for its entire ecosystem. Serving as the underlying infrastructure for decentralized applications and smart contracts, leading Layer 1 networks such as Bitcoin, Ethereum, and Solana manage their own native assets, fee markets, and ledger state independently without relying on external blockchains.
What Is a DAG (Directed Acyclic Graph)?
A Directed Acyclic Graph (DAG) is a non-linear distributed ledger architecture that links transactions or blocks as a network of vertices instead of a single sequential chain. By allowing parallel processing of concurrent activity, DAG-based systems aim to improve scalability and throughput while reducing network bottlenecks. Unlike traditional linear blockchains that rely on a global block tip, DAG protocol performance, security, and consensus models depend heavily on their specific rules for ordering, conflict resolution, and finality.
What Is a Blockchain Virtual Machine and How Does It Work?
A blockchain virtual machine (VM) is a software-based execution environment that processes smart contract instructions and determines state changes deterministically across a decentralized network. By isolating application logic from underlying node operating systems and enforcing strict resource metering (such as gas fees), blockchain VMs like the Ethereum Virtual Machine (EVM) and Solana Virtual Machine (SVM) enable secure, interoperable, and predictable smart contract performance without relying on a centralized server.
What Is a Blockchain Explorer and How Does It Track Onchain Activity?
A blockchain explorer is a search tool that converts raw public blockchain data into readable onchain records, allowing users to track transaction status, wallet balances, token transfers, smart contracts, and network activity. While explorers like Etherscan, Solscan, and mempool.space provide essential verification and debugging tools for crypto transactions, users must distinguish onchain consensus facts from external interpretations like address labels or price data.
