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.
~1 second block times
Fast finality for quick confirmations
Optimized for high throughput
Minimum gas price of just 7 Gwei
Predictable and low transaction costs
No surprise fees
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
Built on proven Tendermint technology
Streamlined specifically for EVM operations
Active testnet for safe experimentation
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
Explorer
Whether you're migrating from Ethereum, building your first DApp, or running infrastructure, OPN Chain provides the tools and performance you need.
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