What is ERC-20?
ERC-20 (Ethereum Request for Comment 20) is the standard technical framework used to create and implement fungible tokens on the Ethereum blockchain. Similar to how websites require web standards like HTTP to function consistently across browsers, ERC-20 defines a mandatory set of rules and functions that smart contracts must follow to ensure seamless interoperability across the network.
Key Characteristics
- Fungibility: Each token unit is identical in value, specification, and utility to any other unit, making them fully interchangeable like traditional fiat currencies.
- Standardization: By establishing common functions for transferring tokens, approving spending limits, and querying wallet balances, ERC-20 ensures that crypto wallets, exchanges, and decentralized applications (dApps) can instantly support any compliant token.
- Smart Contract Automation: Token logic—such as total supply limits, minting rules, and transfer mechanisms—is executed automatically via Ethereum smart contracts.
Common Use Cases
- In-Game Assets: Serving as native currencies or tradeable digital goods within Web3 gaming ecosystems.
- Loyalty and Rewards: Powering modern loyalty point initiatives and corporate rewards programs.
- Decentralized Finance (DeFi): Functioning as collateral, liquidity pool tokens, and trading pairs across financial protocols.
- Governance: Granting holders voting rights to manage Decentralized Autonomous Organizations (DAOs).