Solv Documentation


This page provides an overview of ERC-3525 Semi-Fungible Token standard.
The Ethereum Foundation approved the ERC-3525 Semi-Fungible Token as its 35th ERC token standard on September 5, 2022, placing semi-fungible tokens (SFT) on par with existing fungible tokens (ERC-20) and non-fungible tokens (ERC-721).
ERC-3525 is a general-purpose and omni-asset token standard that combines the quantitative attributes of an ERC-20 token and the descriptive features of an ERC-721 token (NFT).
It is a combination of ERC-20’s _value-based, quantitative operations and ERC-721’s _tokenID-based non-fungible aspects, along with additional innovation on a more generalized classification mechanism like _slot for financial scenarios or business purposes.
Conceptualizing the Semi-Fungible Token
While ERC-20 can represent currencies, company stocks, and point systems, and ERC-721 can represent arts, collectibles, and digital goods, ERC-3525 is a versatile digital representation of ownership with ties to certain values. Assets an ERC-3525 SFT could represent range from simple instruments like gift cards, loyalty points, and checks to more heavy-duty things like bonds, futures/options contracts, ETFs, ABS, or land titles.