# PublicKeyManager (https://dev.cosmospay.lat/docs/sdk/definitions/server/public-key-manager/)

> The shared public API key — client.publicKey. It is what an open-source wallet embeds to reach the few routes anonymous callers may use; the route that serves…

The shared public API key — `client.publicKey`. It is what an open-source wallet embeds to reach the few routes anonymous callers may use; the route that serves it takes no key at all. Mostly useful to tooling that ships such a wallet; a server with its own key has no need for it.

## Constructor

### PublicKeyManager

```ts
constructor(client: Client)
```

**Parameters**

- `client`: [`Client`](https://dev.cosmospay.lat/docs/sdk/definitions/server/client/)

## Properties

### client

```ts
readonly client: Client
```

**Type** [`Client`](https://dev.cosmospay.lat/docs/sdk/definitions/server/client/)

## Methods

### fetch()

The public key for an environment (`dev` → testnet, `prod` → mainnet).

```ts
fetch(env?: 'dev' | 'prod'): Promise<PublicKeyData>
```

**Parameters**

- `env` _(optional)_: `'dev' | 'prod'`

**Returns** `Promise<PublicKeyData>`

## Related

- [Client](https://dev.cosmospay.lat/docs/sdk/definitions/server/client/)