Optimism

Optimism is a Layer 2 (L2) scaling solution for Ethereum that was founded by Jinglan Wang, Karl Floersch, and Kevin Ho in 2019. It is EVM-compatible and utilizes Ethereum's mainnet for security and support of Ethereum dApps. As a rollup scaling solution, Optimism submits faster and cheaper transactions to Ethereum.

All transactions on Optimism are eventually validated on Ethereum's mainnet using Optimistic Rollups, which makes it more efficient than the mainnet. Optimism offers higher throughput and reduced expenses compared to Ethereum, making it an excellent choice for Ethereum developers.

Since Optimism is compatible with EVM, it supports Ethereum tools and DApps. In theory this allows developers to easily port their projects from Ethereum. It is also easy for the user to configure applications such as MetaMask to work with the Optimism by simply tweaking a few settings.

Developers can use the connection endpoints provided by the API to interact with the data on the Optimism and send different types of transactions to the network. The API follows the JSON-RPC standard. JSON-RPC is a stateless, lightweight remote procedure call (RPC) protocol commonly used when interacting with on-chain.

Get testnet ETH

The prerequisite is that you have test ETH on Ethereum Goerli network in your account, once you have that Goerli ETH, use the Optimism Bridge to get it on Optimism Goerli.

For more information about Optimism, please see the official Optimism documentation.