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IERC20

Standard interface for fungible tokens

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What is IERC20?

IERC20 defines the standard interface for fungible tokens on Ethereum. It specifies functions for transferring tokens, checking balances, and managing allowances. Every ERC-20 token implements this interface, making it the most widely used standard in the ecosystem.

Supported chains
EthereumPolygonArbitrumOptimismBaseBNB ChainAvalanche

Key Features

transfer() and transferFrom() for token movement
approve() and allowance() for delegated spending
balanceOf() for checking token holdings
Transfer and Approval events for tracking

Tools related to IERC20

Discover tools that are frequently used with IERC20

IERC721

Standard interface for non-fungible tokens

EthereumPolygonArbitrum +4

IERC1155

Multi-token standard for fungible and non-fungible tokens

EthereumPolygonArbitrum +4

IERC4626

Tokenized vault standard for yield-bearing tokens

EthereumPolygonArbitrum +4

OpenZeppelin Solidity Interfaces

Reference guide to the most important Solidity interfaces from OpenZeppelin Contracts. ERC-20, ERC-721, ERC-1155, vaults, royalties, and more.

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