Introduction
Ethereum is a decentralized, open-source blockchain platform with smart contract functionality. Often dubbed the "World Computer," it represents a global infrastructure for executing programmable agreements without intermediaries.
👉 Discover how Ethereum revolutionizes decentralized applications
Key Features
- Smart Contract Execution: Self-executing contracts with coded terms
- Ethereum Virtual Machine (EVM): Processes state transitions through bytecode execution
- Decentralized Applications (DApps): Build censorship-resistant apps with built-in economies
- Gas System: Measured computational resources using Ether (ETH)
- Blockchain Synchronization: Maintains state via distributed ledger technology
Core Components
1. Network Architecture
- Operates on TCP port 30303 using the DevP2P protocol
- Consists of mainnet and multiple testnets (Ropsten, Kovan, Rinkeby)
2. Accounts and Transactions
| Account Type | Characteristics |
|---|---|
| EOA (Externally Owned) | Contains address/balance, no code |
| Contract | Stores executable code and data |
Transactions contain:
- Sender/recipient addresses
- Value transfer amounts
- Data payloads for contract interactions
3. Ethereum Virtual Machine
- Stack-based VM executing bytecode
- Processes all smart contract computations
- Enforces gas limits for resource management
Ether: The Native Cryptocurrency
- Symbol: ETH
- Subunits: 1 ETH = 10¹⁸ wei
Distribution:
- Initial ICO (2014): 72 million ETH
- Block rewards: Current PoW (transitioning to PoS via Casper protocol)
- Uncle block incentives
Token Standards
| Standard | Purpose | Example Use Cases |
|---|---|---|
| ERC-20 | Fungible tokens | Utility tokens, stablecoins |
| ERC-721 | Non-fungible tokens (NFTs) | Digital collectibles |
Network Participants
Node Types Comparison
| Node Type | Storage Requirements | Verification Capabilities |
|---|---|---|
| Full Node | Complete blockchain | Validates all blocks |
| Light Node | Current state only | Partial verification |
| Remote Client | None | Wallet functionality |
👉 Explore Ethereum node deployment strategies
Smart Contract Development
- Languages: Solidity (primary), Vyper
- Tools: Remix IDE, Truffle Suite, Hardhat
Deployment Flow:
- Code compilation to EVM bytecode
- Gas fee payment for deployment
- Contract address generation
DApp Architecture
Essential components:
- On-chain smart contracts
- Off-chain web interfaces
- Wallet integration (e.g., MetaMask)
Key Terminology
- EIP: Ethereum Improvement Proposal
- Ethash: PoW mining algorithm
- Keccak256: Cryptographic hash function
- Faucet: Testnet ETH distribution tool
FAQ Section
What makes Ethereum different from Bitcoin?
While both are cryptocurrencies, Ethereum focuses on programmability through smart contracts rather than just peer-to-peer cash transactions.
How do gas fees work?
Gas fees pay for computation/bandwidth on Ethereum. Users set gas prices (Gwei) which miners prioritize—higher prices mean faster execution.
When will Ethereum 2.0 launch?
The transition to Proof-of-Stake is happening progressively, with the Beacon Chain already live and merge expected in the near future.
Are ERC-20 and ETH the same?
No. ETH is native currency, while ERC-20 tokens are smart contracts built atop Ethereum with their own supply/rules.
What's the best Ethereum client?
Popular options include Geth (Go), Nethermind (.NET), and Erigon (formerly Turbo-Geth) for different use cases.
Can I mine Ethereum after PoS transition?
No—mining will be replaced by staking where validators secure the network by locking ETH instead of using computational power.
References
- Mastering Ethereum (O'Reilly)
- Ethereum Yellow Paper (Formal Specification)
- Ethereum Foundation Documentation