Writing smart contracts with Rust and CosmWasm for Cosmos blockchains is fun to do. You can write smart contracts for Cosmos-based blockchains using the Rust programming language and the CosmWasm SDK and libraries. Cosmos is a blockchain that makes building new chains easier than before, also known as an internet of blockchains. Cosmos functions as a foundation that can be used to build application-specific blockchains that are interoperable.