Web3 remains in its early stages, requiring deep technical knowledge for those exploring this space. However, diving into complex technical details may not be immediately beneficial for newcomers without a technical background.
Just as studying gold doesn’t require analyzing its molecular structure but rather its market value, properties, and circulation systems, this series adopts a product manager’s perspective—focusing on user-friendly insights into Ethereum’s architecture, mechanisms, and underlying logic, avoiding overly technical jargon.
This is the first article in the "Understanding Ethereum" series.
Blockchain Evolution: From Bitcoin to Ethereum
Blockchain technology has evolved through distinct phases:
- Blockchain 1.0: Bitcoin introduced decentralized digital currency.
- Blockchain 2.0: Ethereum pioneered smart contracts, expanding blockchain’s utility beyond payments.
While Bitcoin opened the door to decentralized finance, Ethereum transformed Web3 into a thriving ecosystem of applications.
Today, public blockchains follow a “two giants, multiple contenders” model:
- Giants: Bitcoin (digital gold) & Ethereum (world computer).
- Contenders: Chains like BSC (gaming) and Solana (NFTs), serving niche use cases.
As the leading smart contract platform, Ethereum’s technical framework helps us understand:
- Decentralized applications (DApps).
- Future blockchain trends.
This article breaks down Ethereum’s structure, transaction mechanisms, and operating principles.
01 Ethereum’s Core Purpose
Great innovations solve real problems. Ethereum emerged to address Bitcoin’s limitations:
- Bitcoin: A payment network for digital currency, unsuitable for complex applications.
- Ethereum: A general-purpose blockchain that abstracts infrastructure (e.g., consensus algorithms) so developers can build DApps without reinventing the wheel.
👉 Why Ethereum matters for decentralized apps
Key Distinctions:
| Bitcoin | Ethereum |
|-----------------------|----------------------------|
| Digital currency | App development platform |
| Limited scripting | Turing-complete smart contracts |
| POW consensus | Transitioned to POS (2022) |
Ether (ETH) isn’t just money—it’s fuel for running computations on Ethereum’s “world computer.”
02 Ethereum’s Development Phases
Timeline:
- 2013: Vitalik Buterin publishes Ethereum whitepaper.
- 2015: First block mined (Frontier launch).
- 2022: The Merge (POW → POS).
Four Evolutionary Stages:
- Frontier: Basic POW mining & contract execution.
- Homestead: Network stability improvements (e.g., GUI wallets).
- Metropolis: User-friendly interfaces & DApp store.
- Serenity: Full POS transition (current phase).
Future Roadmap (Vitalik’s 2021 Goals):
- The Merge: Shift to POS (completed).
- The Surge: Sharding for scalability.
- The Verge: Verkle trees for data efficiency.
- The Purge: Storage simplification.
- The Splurge: Minor optimizations.
Current Focus: Solving Ethereum’s high fees and slow speeds via sharding (splitting the database to parallelize transactions).
03 Ethereum’s Architectural Layers
Ethereum’s framework comprises four layers:
1. Data Layer
- Purpose: Secures transactions via cryptography.
- Key Concepts: Private/public keys, addresses.
- Why It Matters: Explains blockchain’s transparency vs. traditional finance.
2. Consensus Layer
- Purpose: Maintains network agreement (POW → POS).
Key Algorithms:
- POW: Energy-intensive (Bitcoin’s model).
- POS: Staking-based (Ethereum’s current system).
👉 How POS improves scalability
3. Contract Layer
- Smart Contracts: Self-executing code enabling DApps.
- Example: DeFi protocols like Uniswap.
4. Application Layer
- DApps: Web3 products (e.g., CryptoKitties, MetaMask).
Web2 vs. Web3:
- Centralized (Facebook) → Decentralized (Steemit).
FAQ
Q1: Why did Ethereum switch to POS?
A1: To reduce energy use and improve scalability for sharding.
Q2: What’s the biggest challenge for Ethereum?
A2: Balancing decentralization with speed—sharding aims to fix this.
Q3: How do smart contracts work?
A3: They auto-execute terms (e.g., releasing funds when conditions are met).