# z.tempo.ZoneId.chainId

Codec decoding a zone chain id into a zone id.

## Imports

```ts
import { z } from 'ox/zod'

z.tempo.ZoneId.chainId
```

## Definition

```ts
export const chainId = z.codec(z.number(), ZoneId, {
  decode: (value) => core_ZoneId.fromChainId(value),
  encode: (value) => core_ZoneId.toChainId(value),
})
```

**Source:** [src/zod/tempo/ZoneId.ts](https://github.com/wevm/ox/blob/main/src/zod/tempo/ZoneId.ts)