The Optimism Client SDK

There are a few areas in which the SDK can help you navigate the differences between Optimism and Ethereum:

• Gas costs
• Interlayer communication

JavaScript SDK

Reference (opens new window)

Tutorials:

• Viewing transactions between layers (opens new window)
• Bridging ETH with the Optimism SDK (opens new window)
• Bridging ERC-20 with the Optimism SDK (opens new window)
• Estimate the costs of an Optimistic (L2) transaction (opens new window)