An Ethereum interface standard for fungible token contracts, covering balances, transfers, allowances, and events.

The permit standard so an ERC-20 approval can be signed off-chain and submitted with a swap.

A permissioned token standard family used for compliant security-token transfers (identity and eligibility checks).

The account-abstraction standard that adds user operations, bundlers, and paymasters without changing Ethereum consensus.

A vault standard so yield-bearing shares (like lending receipts) share one deposit and redeem interface.

A standard vocabulary of custom error types for common ERC-20, ERC-721, and ERC-1155 token failures.

Token-bound accounts. An NFT can own assets and initiate transactions like a wallet.

The Ethereum standard for non-fungible tokens, where each token id is unique.