Welcome to OPN Chain Docs

What is OPN Chain?

OPN Chain is a high-performance EVM blockchain developed by IOPn, built as an optimized version of Cronos focused purely on Ethereum compatibility. Unlike standard Cosmos SDK chains, OPN Chain is designed specifically for EVM operations with IBC (Inter-Blockchain Communication) planned for the future.

Why OPN Chain?

Lightning Fast

• ~1 second block times

• Fast finality for quick confirmations

• Optimized for high throughput

Cost Efficient

• Minimum gas price of just 7 Gwei

• Predictable and low transaction costs

• No surprise fees

Developer Friendly

• Full EVM compatibility - deploy existing Ethereum contracts without modification

• Support for latest Ethereum features including Pectra upgrade

• Familiar tooling - works with Hardhat, Foundry, Remix, and more

Battle-Tested

• Built on proven Cronos technology

• Streamlined specifically for EVM operations

• Active testnet for safe experimentation

Network Information

Parameter	Value
Network Name	OPN Testnet
Chain ID	984 (0x3d8)
RPC URL	https://testnet-rpc.iopn.tech
Currency Symbol	OPN
Block Time	~1 second
Min Gas Price	7 Gwei
Faucet	https://faucet.iopn.tech
Explorer	https://testnet.iopn.tech

Start Building Today

Whether you're migrating from Ethereum, building your first DApp, or running infrastructure, OPN Chain provides the tools and performance you need.