> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sei.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Sei Network Interoperability Framework

> Understand how Sei enables seamless interaction between EVM and Cosmos ecosystems through its dual address system and precompiles.

<Info>
  **CosmWasm deployments are frozen, and inbound IBC is being disabled.** Per [Proposal 115](https://www.mintscan.io/sei/proposals/115), no new CosmWasm contracts can be uploaded or instantiated on Sei. [Proposal 116](https://www.mintscan.io/sei/proposals/116) additionally disables inbound IBC transfers, so IBC assets bridged from Cosmos chains can no longer arrive on Sei. The interoperability features described on this page apply to **already-deployed** CosmWasm contracts, native Bank Module assets, and Cosmos-SDK modules accessed via precompiles. For new smart contract development, build directly on the EVM. See [SIP-3](https://github.com/sei-protocol/sips/blob/main/sips/sip-3.md) for the full migration context.
</Info>

## Dual Address Support

Sei utilizes two distinct address types:

* **EVM (0x) address:** Ethereum-style addresses, with "0x" prefix.
* **Cosmos address:** Bech-32 addresses, with "sei1" prefix.

Both addresses are derived from the same public key, ensuring seamless asset
integration across formats. You can find your corresponding wallet addresses
directly in the Sei Dashboard.

For more details on interoperability, explore our article
[here](https://blog.sei.io/sei-v2-interoperability/).

## Virtual Machine Interoperability

EVM and existing CosmWasm-based smart contracts co-exist on Sei, but live in
different execution environments. This creates a challenge for users, who use
wallets that typically only support a single execution environment. Likewise for
developers, existing tooling and libraries can only interact with either EVM or
Wasm (Think EthersJS vs CosmJS).

To bridge the gap between EVM and Wasm, Sei exposes Cosmos-SDK modules and
already-deployed CosmWasm contracts to the EVM via precompiled contracts. New
smart contracts on Sei should be deployed on the EVM directly.

## Precompile Contracts

Sei precompiles are smart contracts embedded directly within the Sei EVM
environment. They provide a gateway for users and developers to access Cosmos-SDK functions through the EVM RPC interface.

For instructions on utilizing EVM precompiles, refer to the
[Example Usage](/evm/precompiles/example-usage) section.

## Example Diagram

<img src="https://mintcdn.com/seilabs/szEAtr1JphlH_mVc/assets/interoperability.png?fit=max&auto=format&n=szEAtr1JphlH_mVc&q=85&s=627916f13ccb6a95abd7ce56fabe2324" alt="Interoperability" width="1746" height="1168" data-path="assets/interoperability.png" />

*Enabling seamless access to all tokens and contracts on Sei*