# Katana data apps

> Katana is a layer 2 built for DeFi liquidity, routing sequencer and protocol revenue back to its own markets. Its apps cover activity, liquidity and yields.

Markdown copy of https://voltfincrypto.com/chains/katana

## Ethereum

- [Multicall3, Permit2 and EntryPoint Addresses by Chain](https://voltfincrypto.com/apps/multicall3-permit2-entrypoint-addresses) (table, planned): Is Multicall3, Permit2 or an ERC-4337 EntryPoint deployed on a given chain, at its usual address and with the expected code?

## Layer 2s

- [EVM Chain List: Chain IDs, Native Tokens and RPC Support](https://voltfincrypto.com/apps/evm-chain-list) (table, planned): What is the chain ID and native token of each EVM chain, and which RPC methods do its public endpoints support?
- [WETH and Wrapped BTC Token Addresses by Chain](https://voltfincrypto.com/apps/wrapped-btc-eth-token-addresses) (table, planned): What is the WETH, WBTC or cbBTC contract address on each chain, and who issues or backs each one?
- [Katana Network Stats: Activity, Vault Bridge Yield and DeFi](https://voltfincrypto.com/apps/katana-network-stats) (dashboard, planned): How busy is Katana, how much sits in Vault Bridge earning yield and how much liquidity does the chain own?
- [Rollup Decentralization: Upgrade Keys and Exit Windows](https://voltfincrypto.com/apps/rollup-decentralization) (table, planned): Who can upgrade each rollup's bridge contracts, and how much notice do users get before an upgrade?