Blockchain technology encompasses a vast range of applications. This series will focus specifically on smart contract development, omitting theoretical concepts already well-covered in existing literature.
Article Structure: A 30-Part Series
The content is divided into three key segments:
- Blockchain Fundamentals:
Covers transactions, blocks, accounts, blockchain networks, clients, Gas, and Remix. - Hands-On Smart Contract Development:
Explores compiling, deploying, and executing smart contracts, Solidity programming basics, and Oraclize integration. - Practical Exercises:
Real-world implementation scenarios.
Author’s Writing Style
- The term "contract" will occasionally replace "smart contract" for brevity.
- Technical terms are highlighted with English equivalents only at first mention.
👉 Explore blockchain development tools
About the Author
Ailin Liou is a software consultant and instructor with expertise spanning API design, backend architecture, automated testing, web development, and decentralized applications (DApps). Since 2009, she has:
- Authored smart contract tutorials for 2018 DISTRIBUTED HEALTH.
- Lectured at Modern Web, JSDC, and iThome workshops.
- Founded Taiwan’s Remote Workers Community.
For collaborations, contact [email protected].
Traditional Contracts vs. Smart Contracts
Key Elements of Traditional Contracts
- Parties: Identifiable entities (e.g., Company A and B).
- Terms: Enforceable business logic.
- Duration: Valid within a specified timeframe.
- Immutability: Amendments require new contracts.
Example Payment Schedule:
| Payment Phase | Date | Amount (Tax-Inclusive) |
|---------------|------------|------------------------|
| Initial Deposit | 01/01/2023 | XXX |
| Interim Payment | 03/01/2023 | XXX |
| Final Settlement | 05/01/2023 | XXX |
Automation Challenges:
- Secure identity verification.
- Unalterable code execution.
- Banking integration for transactions.
Ethereum’s infrastructure simplifies these hurdles.
What Are Smart Contracts?
In essence, they are self-executing programs on a blockchain. While Ethereum dominates the space, platforms like EOS also support smart contracts.
Key Differences from Conventional Programs
- Built-in Payment Systems:
Every contract has a native wallet for seamless transactions. - Costly Data Storage:
Writing to the blockchain incurs fees (Gas) paid to miners for decentralized storage. - Immutable Post-Deployment:
Code cannot be altered, ensuring trust in DApps. - No Centralized Hosting:
Runs across Ethereum nodes globally, eliminating single-point failures.
👉 Learn about Gas optimization
Common Use Cases
- Token Sales (ICOs)
- Decentralized Games (e.g., poker, pet simulators)
- Crypto Exchanges
ICO: Initial Coin Offering—a cryptocurrency fundraising method.
Summary
Today’s introduction outlined smart contracts’ unique traits and applications. Upcoming sections will delve into blockchain mechanics essential for developers.
FAQ
1. Can smart contracts be updated after deployment?
No. Once deployed, the logic is permanent to prevent manipulation.
2. Why is Gas required?
It compensates miners for computational resources used in transaction validation.
3. Which blockchain is best for smart contracts?
Ethereum remains the most widely adopted, but alternatives like EOS offer scalability.