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Frequently Asked Questions ​

🔍 What is the EVM Explorer for Nibiru? ​

Mainnet:
📎 https://nibiscan.io

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

🌐 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:

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

Example config:

js
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:

bash
npx hardhat compile

Make sure your hardhat.config.js includes:

js
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 →

🧪 Is there a faucet for Testnet? ​

Yes — use the official faucet at:
🌐 https://app.nibiru.fi/faucet.

🛠 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 or reach out in Discord. There's also a grants program underway.

🧠 Is there indexer or subgraph support? ​

Not yet out of the box, but:

  • EVM-compatible indexers like SubQuery can work

🏗 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:

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

🔗 Where can I learn more? ​