# Networks and Connection Details

# Development Node

Purpose

This is the information for a local development node.

Parameter Value
Currency Ether (ETH)
Chain ID 420
HTTP Endpoint https://localhost:8545
HTTP Endpoint for L1 https://localhost:9545
Mnemonic for rich account test test test test test test test test test test test junk

# Optimistic Kovan

Purpose

This is our test network. You're welcome to deploy whatever contracts to wish to test here, no whitelist required

Parameter Value
Network Name Optimistic Kovan
Description Testnet (public)
Chain ID 69
Explorer https://kovan-optimistic.etherscan.io
HTTP Endpoint https://kovan.optimism.io
WebSocket Endpoint wss://ws-kovan.optimism.io
L1 Contract Addresses link (opens new window)
L2 Contract Addresses link (opens new window)

# Optimistic Ethereum

Restricted Access

This is our production network, our equivalent of mainnet. We currently have a whitelist system in place that limits who can deploy contracts to this network for reasons of performance, availability, and security. Eventually we will open it up to anybody who wants to deploy, but we need to do more development and testing before we get there. 99.9% secure is not good enough.

When you are ready to deploy to production please fill up this form (opens new window) and we'll get back to you.

Parameter Value
Network Name Optimistic Ethereum
Description Mainnet (restricted)
Chain ID 10
Explorer https://optimistic.etherscan.io
HTTP Endpoint https://mainnet.optimism.io
WebSocket Endpoint wss://ws-mainnet.optimism.io
L1 Contract Addresses link (opens new window)
L2 Contract Addresses link (opens new window)

# Third Party Applications

Click here to see the addresses for other applications running in Optimistic Ethereum.