* Nodes run smart contracts code on Ethereum Virtual Machine (EVM). It is a virtual machine designed to operate as a runtime environment for Ethereum-based smart contracts.
* EVM is operated in a sandboxed environment (isolated from the main network). This is a perfect testing environment.
* You can download the EVM, run your smart contract locally in an isolated manner and once you have tested and verified it, you can deploy it on the main network.
