> For the complete documentation index, see [llms.txt](https://cascadia.gitbook.io/gitbook/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cascadia.gitbook.io/gitbook/developers/cosmwasm/cw20-base-contract.md).

# CW20 Base Contract

CW20 is a specification for fungible tokens. It's an ERC-20 standard but with distinct modifications. It can be integrated into contracts in Cascadia or used to interact with existing CW20-compliant contracts.