Blockchain tokens—alternatively referred to as "通证" (tokens) or "令牌" (digital certificates)—are cryptographic assets registered on blockchain networks like Ethereum. By paying transaction fees in Ether (ETH), developers can deploy smart contracts that generate new tokens with customizable attributes, names, and symbols. These tokens are universally recognized within Ethereum's ecosystem as Tokens.
How Tokens Function Across Systems
Traditional Systems Example
In conventional platforms (e.g., Facebook), an Access Token—a string of alphanumeric characters—grants permissions to perform specific actions once user consent is obtained.
👉 Learn how Facebook implements access tokens
Blockchain Adaptation
Ethereum expands this concept by standardizing token types, such as:
- ERC20 Tokens: Fungible tokens for payments/staking (e.g., SELF TOKEN).
- ERC721 Tokens: Non-fungible tokens (NFTs) representing unique assets (e.g., CryptoKitties).
Token Standards in Practice
| Token Type | Example | Symbol | Supply | Contract Address |
|---|---|---|---|---|
| ERC20 | SELF TOKEN | SELF | 200,000,000 | 0x67...e21 |
| ERC721 | CryptoKitties | CK | 1,309,364 | 0x06...66d |
Note: Both examples are classified as Tokens but differ in utility and technical specifications.
Key Characteristics
- Interoperability: Tokens operate seamlessly within their native blockchains.
- Customizability: Developers define token behavior via smart contracts.
- Transparency: All transactions are publicly verifiable on-chain.
FAQ
Q1: What’s the difference between ERC20 and ERC721 tokens?
A1: ERC20 tokens are interchangeable (like currencies), while ERC721 tokens represent unique items (like collectibles).
Q2: Can tokens be created without coding knowledge?
A2: Yes—platforms like OpenZeppelin provide templates for token generation.
Q3: Are blockchain tokens regulated?
A3: Compliance varies by jurisdiction; consult legal experts for specifics.
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