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 offchain transaction.

Offchain, 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 sepolia (testnet)

• Chain ID: 11155420
• Contract address: 0x68A2f4423ad3bf5139Db563CF3bC80aA09ed7079
• Network name: optimism-sepolia (used for Hardhat or ethersjs)
• Tableland validator API: https://testnets.tableland.network/api/v1
• RPC URLs: https://chainlist.org/chain/11155420
• Block time: 2 seconds
• Block depth: 0
• SQL materialization time: 2 seconds
• Symbol: ETH
• Bridge: https://app.optimism.io/bridge
• Faucet: https://www.alchemy.com/faucets/optimism-sepolia

optimism (mainnet)

• Chain ID: 10
• Contract address: 0xfad44BF5B843dE943a09D4f3E84949A11d3aa3e6
• Network name: optimism (used for Hardhat or ethersjs)
• Tableland validator API: https://tableland.network/api/v1
• RPC URLs: https://chainlist.org/chain/10
• Block time: 2 seconds
• Block depth: 0
• SQL materialization time: 2 seconds
• Symbol: ETH
• Bridge: https://app.optimism.io/bridge
• Faucet: https://www.alchemy.com/faucets/optimism-sepolia

Getting testnet funds

If you request testnet Ether from a faucet noted above, it should go direct to the testnet. However, you can also request funds from the Ethereum Sepolia testnet and bridge it. You must move the ETH from Ethereum to Arbitrum at the URL listed above—i.e., select "ETH" (or, as in the screenshot below, other ERC20 tokens that exist on Ethereum Sepolia can be bridged).