What is an ERC-20 Token? Ethereum's Fungible Token Standard

Things to know:

The ERC-20 token standard was the first token standard on the Ethereum network, allowing developers to create fungible (interchangeable) tokens. Let’s explore what ERC-20 tokens are and why this standard is pivotal in the blockchain ecosystem.

Understanding ERC-20 Tokens

ERC-20 is a fungible token standard on the Ethereum blockchain. It enables the creation of tokens that are identical and interchangeable, unlike non-fungible tokens (NFTs), which are unique.

Key Features:

• Standardized Interface: Ensures compatibility across wallets, exchanges, and dApps.
• Versatility: Represents assets like currencies, shares, or commodities.
• Smart Contract-Based: Leverages Ethereum’s security and programmability.

👉 Discover how ERC-20 powers DeFi

History of ERC-20 Tokens

Proposed by Fabian Vogelsteller in 2015 via an Ethereum Improvement Proposal (EIP), ERC-20 introduced core functions like:

• totalSupply
• balanceOf
• transfer

Today, ERC-20 tokens dominate Ethereum’s ecosystem, underpinning stablecoins (USDC, USDT), governance tokens (AAVE, MKR), and utility tokens.

How ERC-20 Tokens Work

The standard defines:

1. Rules: Token issuance, transfers, and approvals.
2. Events: Logs for transactions (e.g., Transfer).

This ensures seamless integration with platforms like MetaMask and Uniswap.

Use Cases of ERC-20 Tokens

| Application | Examples | Description |
|----------------------|------------------------------|--------------------------------------|
| Stablecoins | USDC, USDT | Pegged to fiat currencies. |
| Governance | AAVE, MKR | Voting rights in DAOs. |
| Utility Tokens | LINK, ENJ | Access to platform services. |
| Asset-Backed | Tokenized gold | Represents physical assets. |

👉 Explore top ERC-20 tokens

Benefits of ERC-20

1. Standardization: Streamlines development.
2. Interoperability: Works across EVM chains.
3. Security: Community-audited.
4. Programmability: Supports staking, burns, etc.

Top ERC-20 Tokens

1. USDC: Dollar-pegged stablecoin.
2. LINK: Powers Chainlink’s oracles.
3. AAVE: DeFi governance token.
4. MANA: Currency for Decentraland.

⚠️ Disclaimer: Not financial advice.

Creating ERC-20 Tokens

Methods:

1. Custom Smart Contract: Use Solidity.
2. Templates: Leverage audited contracts via thirdweb.

Popular Contracts:

• Token Drop: Release tokens with conditions.
• Airdrop: Distribute tokens to recipients.

Build your ERC-20 token

FAQs

1. Are all Ethereum tokens ERC-20?

No. Other standards like ERC-721 (NFTs) exist.

2. Where can I store ERC-20 tokens?

Any ERC-20-compatible wallet (e.g., MetaMask).

3. How to buy ERC-20 tokens?

Use exchanges like Uniswap or Coinbase.

4. Is ETH an ERC-20 token?

No. ETH is Ethereum’s native currency.

Future of ERC-20 Tokens

ERC-20 remains the backbone of Ethereum’s economy, enabling innovation in DeFi, DAOs, and beyond. Start building today with free thirdweb tools.

Got questions? Join our Discord!