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# Frequently Asked Questions

# 🔍 What is the EVM Explorer for Nibiru?

Mainnet:
📎 https://nibiscan.io (opens new window)

Testnet (Testnet-2):
📎 https://testnet.nibiscan.io (opens new window)

# 🌐 What are the EVM RPC URLs and Chain IDs?

Mainnet

  • RPC: https://evm-rpc.nibiru.fi
  • Chain ID: 6900 (Hex: 0x1AF4)
  • Chain Name: cataclysm-1

Testnet-2

  • RPC: https://evm-rpc.testnet-2.nibiru.fi
  • Chain ID: 6911 (Hex: 0x1AFF)
  • Chain Name: nibiru-testnet-2

# 💡 What are FunTokens?

FunTokens enable seamless movement of tokens between the EVM and Cosmos environments on Nibiru.
You can:

  • Convert ERC-20 tokens into Cosmos bank coins
  • Convert Cosmos coins into ERC-20 tokens

This powers composability across DeFi apps, IBC, and Wasm smart contracts — all in one ecosystem.

# 🔄 How do I convert ERC-20 to Cosmos bank coins?

Call the FunToken precompile at 0x000...0800 using sendToBank() and specify your Cosmos Bech32 address.
It’ll convert your ERC-20 tokens to Bank Coins.

# 🔁 How do I convert Cosmos coins to ERC-20?

Use sendToEvm() on the FunToken precompile.
It burns your Cosmos coins and releases (or mints) ERC-20 to your Ethereum address.

# 📦 What are Precompiles on Nibiru?

Nibiru includes special precompiled contracts for cross-VM interoperability:

  • FunToken Precompile 0x000...0800: ERC-20 ↔ Bank coin transfer
  • Oracle Precompile 0x000...0801: Live price feeds (ChainLink format)
  • Wasm Precompile 0x000...0802: Call/query Wasm contracts from Solidity

These enable native bridging and modular contract design without external dependencies.

# 📊 How can I access live prices from oracles?

Use the Oracle Precompile at 0x0000000000000000000000000000000000000801.
It supports ChainLink’s AggregatorV3Interface, so you can fetch prices like ETH/USD, BTC/USD, NIBI/USD in Solidity, or via Ethers.js.

# 🧰 How do I deploy Solidity contracts to Nibiru?

You can use Hardhat:

Copy npx hardhat run scripts/deploy.js --network nibiru

Example config:

Copy networks: { nibiru: { url: "https://evm-rpc.nibiru.fi", chainId: 6900, accounts: [PRIVATE_KEY], } }

# 📚 How do I compile smart contracts for Nibiru?

Use Hardhat with Solidity 0.8.19+ and run:

Copy npx hardhat compile

Make sure your hardhat.config.js includes:

Copy require("@nomicfoundation/hardhat-toolbox"); module.exports = { solidity: "0.8.19", };

# 📈 What's on the roadmap?

Upcoming features include:

  • Multi-VM composability (Wasm + EVM)
  • Expanded oracle feeds and precompile utilities
  • Bridged and native stablecoins

📅 Roadmap page → (opens new window)

# 🧪 Is there a faucet for Testnet?

Yes — use the official faucet at:
🌐 https://app.nibiru.fi/faucet (opens new window).

# 🛠 What tools and SDKs are available?

# 📘 Is Wasm supported on Nibiru?

Yes. You can deploy and interact with CosmWasm contracts.
EVM developers can call Wasm contracts directly using the Wasm Precompile (0x000...0802).

# 🌉 How do I bridge tokens into Nibiru?

For now, bridging is manual via IBC for test assets. Nibiru is working on integrations with bridge providers like Axelar, IBC, and LayerZero for both testnet and mainnet.

# 🪙 Does Nibiru have a native token?

Yes — the native token is $NIBI. It’s used for:

  • Staking and governance
  • Paying gas fees on both Cosmos & EVM layers
  • Collateral and incentive systems
  • WNIBI is the ERC20 version is NIBI called Wrapped NIBI

# 📤 Can I launch a token (ERC20 or IBC) on Nibiru?

Yes. You can:

  • Use ERC20Minter.sol to deploy custom tokens via Hardhat
  • Use MsgCreateFunToken to create a Cosmos-EVM mapped token

# 🪙 Does Nibiru support token standards like CW20, ERC20, etc.?

Yes — Nibiru supports:

  • ERC20 on the EVM layer
  • Bank native and Token Factory tokens on the Wasm Layer
  • CW20/CW721 on the Wasm layer
  • ICS-20 for IBC tokens

And via FunToken, you can map these across VMs!

# ⚒ How do I test smart contract interactions?

You can:

  • Use Hardhat + Ethers.js on the EVM side
  • Use *NibiJS on the Cosmos/Wasm side
  • Call Wasm contracts from Solidity via the Wasm precompile

# ⚡ What’s the transaction speed and throughput?

  • Nibiru processes up to 10,000+ TPS
  • EVM layer supports single-threaded execution now, with parallel optimistic execution (PARE) on the roadmap

# 🧑‍💼 How can projects get listed or supported by Nibiru?

Submit your project or partnership request via the Ecosystem Portal (opens new window) or reach out in Discord (opens new window). There's also a grants program underway.

# 🧠 Is there indexer or subgraph support?

Not yet out of the box, but:

# 🏗 Can I use MetaMask?

Yes — Nibiru EVM is MetaMask compatible.
Just add the RPC, chain ID, and you're good to go.

Example config for MetaMask:

Copy { "network": "Nibiru Mainnet", "rpc": "https://evm-rpc.nibiru.fi", "chainId": 6900, "currency": "NIBI", "explorer": "https://nibiscan.io" }

# 🔗 Where can I learn more?

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