# prepareCalls

Prepares and simulates write intents without submitting them.

## Import

```ts
import { Ensforge } from "@ensforge/sdk";
```

## Usage

:::code-group
```ts [index.ts]
import { sdk } from "./client";

const result = await sdk.batch.prepareCalls({
  calls: [],
});
```

```ts [client.ts]
// [!include ~/snippets/sdk/client.ts]
```
:::

## Parameters

```ts
import type { PrepareCallsParameters } from "@ensforge/sdk/batch";
```

### calls

`ReadonlyArray<EnsWriteIntent<unknown, WriteError>>`

Read requests or write intents included in the operation.

### walletClient

`WalletClient | undefined`

Viem wallet client override for this operation. Defaults to the wallet resolved from the config.

### account

`Account | Address | undefined`

Account used to authorize this operation. Defaults to the account exposed by the resolved wallet client.

## Return Type

```ts
type PrepareCallsResult = Awaited<ReturnType<typeof prepareCalls>>;
```

Returns `readonly PreparedWriteCall[]`.

## Effect

Use `.effect` when composing the method in an Effect program. The success and error channels remain
fully typed.

```ts
import { Effect } from "effect";
import { sdk } from "./client";

const program = sdk.batch.prepareCalls.effect(parameters);

type Success = Effect.Effect.Success<typeof program>;
type Failure = Effect.Effect.Error<typeof program>;

const result = await Effect.runPromise(program);
```

## Error

The method rejects with the corresponding Core action errors. Use `.effect` to keep those failures
in the typed Effect error channel.

See [Error Handling](/sdk/guides/error-handling).

## Action

* [`prepareCalls`](/core/api/actions/batch/prepare-calls)