# Introduction ## What is SIX Protocol SIX Protocol is a blockchain built using the [Cosmos SDK](https://docs.cosmos.network/main), which is an initial blockchain with a Proof-of-Stake (PoS) consensus that secures blockchain applications on top of [CometBFT](https://www.notion.so/Introduction-f79819e1a1424cca9f73a213faa3980a) (also known as Tendermint BFT). After Proposal 6 passed on both Sixnet (mainnet) and Fivenet (testnet), the SIX Protocol now supports EVM-compatible Solidity, and all EVM tools work out of the box. To understand how the Cosmos chain is able to use EVM, you can check out the project called [Ethermint](https://docs.ethermint.zone/). ## What and Why EVM? What is evm? The Ethereum Virtual Machine (EVM) is a software environment that operates on the Ethereum network and enables the execution of smart contracts. The Ethereum Virtual Machine (EVM) runs smart contracts written in Solidity, which is the main programming language used for writing smart contracts on the Ethereum network. The EVM also manages the state of the Ethereum network, including account balances, transactions, and contract execution. SIX Network is committed to providing benefits to developers who contribute to the SIX Protocol. Most smart contract developers are familiar with the Solidity language and EVM tools such as Hardhat, Truffle, and Remix IDE. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://sixnetwork.gitbook.io/six-protocol-technical-document/introduction.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.