# Reference: `sushi/mvm` Chain

The MVM chain module exposes Move VM chain metadata.

| Export | Purpose |
|---|---|
| `mvmChains`, `mvmChainIds` | Known MVM chains and IDs. |
| `MvmChainId` | Enum-like MVM chain ID lookup. |
| `isMvmChainId`, `getMvmChainById` | Guard and lookup by ID. |
| `MvmMainnetChainId`, `isMvmMainnetChainId` | Mainnet type and guard. |
| `MvmChainKey`, `isMvmChainKey`, `getMvmChainByKey` | Chain key type, guard, and lookup. |
| `defineMvmChain` | Define an MVM chain object. |

```ts twoslash
import { MvmChainId, getMvmChainById } from 'sushi/mvm'

const aptos = getMvmChainById(MvmChainId.APTOS)
```