Optimism

An overview of using Optimism with Tableland.

---

Optimism is one of the EVM-compatible Layer 2 solutions that Tableland currently supports. Check out the overview of what this network is and relevant information when using it.

Overview

Optimism is an optimistic rollup built on top of Ethereum. It is a sidechain that inherits Ethereum’s security but operates as a separate protocol with its own set of nodes running. Rollups sequencers batch transactions onto the L1 at various intervals and leverage fraud proofs for self-enforced validation of the off-chain transaction.

Off-chain, the transactions happen much quicker than the batching. Note that developers must bridge assets from Ethereum to Optimism to take advantage of the faster transaction confirmation speeds and low costs.

Setup & resources

Optimism (mainnet)

• Average block time: 2 seconds
• Chain ID: 10
• Symbol: ETH
• Status Dashboard:
  • https://status.optimism.io/
• Block Explorer:
  • https://optimistic.etherscan.io/
• RPC URL:
  • See https://chainlist.org/chain/10
• Tableland contract address: 0xfad44BF5B843dE943a09D4f3E84949A11d3aa3e6
• SDK network name: optimism
• Tableland gateway: https://tableland.network/api/v1

Optimism Goerli (testnet)

• Average block time: 2 seconds
• Chain ID: 420
• Symbol: ETH
• Status Dashboard:
  • https://status.optimism.io/
• Block Explorer:
  • https://blockscout.com/optimism/goerli/
• Faucet:
  • Use the Ethereum Goerli faucet and then bridge ETH to Optimism
• Bridge:
  • https://app.optimism.io/bridge
• RPC URL:
  • See https://chainlist.org/chain/420
• Tableland contract address: 0xC72E8a7Be04f2469f8C2dB3F1BdF69A7D516aBbA
• SDK network name: optimism-goerli
• Tableland gateway: https://testnets.tableland.network/api/v1

Getting testnet funds

1. Request testnet Ether from a faucet noted above (e.g., here or here).
2. Move the ETH from Ethereum to Optimism at https://app.optimism.io/bridge—i.e., select "ETH" or any other ERC20 tokens that exist on Ethereum Goerli that can be bridged.