Tooling & Resources

Tools, libraries, wallets, and explorers for building on Cosmos EVM.

Cosmos EVM implements a complete Ethereum execution environment, so the standard development toolchain carries over without modification. You can use any of the EVM tools you already know; just point them at your chain’s RPC endpoint and chain ID.

Development Tools

The following tools are a few examples of the many tools that are available for development on Cosmos EVM:

Tool	Description
Hardhat	JavaScript/TypeScript-based framework with a flexible plugin system and Ethers.js integration.
Foundry	Rust-based toolkit with Solidity-native tests and fast execution. Includes forge, cast, anvil, and chisel.
OpenZeppelin Contracts	Audited implementations of common standards — ERC-20, ERC-721, access control, and more.

Client Libraries

Library	Description
Ethers.js	JS/TS library for contract interaction, transaction signing, and provider management.
Viem	TypeScript-first, tree-shakeable library for RPC calls, ABI encoding, and contract access. Used by Wagmi.
Wagmi	React hooks for wallet connection, chain state, and contract reads/writes. Built on Viem.
RainbowKit	React component library for wallet connection UI. Integrates with Wagmi.

Wallets

See the quick-start guide for a walkthrough of connecting MetaMask to a local chain. The following are a few examples of the many wallets that are available for development on Cosmos EVM:

Wallet	Notes
MetaMask	Add network via Settings → Networks
Rabby	Add network via Settings → Networks
WalletConnect	Standard WalletConnect integration
Keplr	Supports both Cosmos and Ethereum transaction formats
Leap	Supports both Cosmos and Ethereum transaction formats
Ledger	Compatible via MetaMask or other wallet interfaces

To add a chain manually, you’ll need: the network name, RPC URL (port 8545), chain ID, and currency symbol.

Block Explorers

Cosmos EVM chains support two types of explorer: EVM explorers for Ethereum-formatted data and Cosmos explorers for Cosmos and IBC data. Mintscan supports both but requires a custom integration.

Explorer	Type	Link
Blockscout	EVM	GitHub
Ping.pub	Cosmos	GitHub
BigDipper	Cosmos	GitHub

Testing & Analysis

Tool	Purpose
Slither	Static analysis — detects common vulnerability patterns in Solidity.
solidity-coverage	Reports untested code branches. Works with Hardhat and Foundry.
Echidna	Property-based fuzzer for Solidity contracts.
OpenZeppelin Test Helpers	Time manipulation, event assertions, and revert testing for Hardhat/Mocha.