# Batch Transactions

> Documentation index: [llms.txt](https://namera.ai/llms.txt).

Source: https://namera.ai/docs/sdk/guides/transactions/batch-transactions

Submit multiple calls in one execution.

Put multiple calls in the `calls` array to submit them together. A batch uses
one account, one session key, and one network, with a single submission ID to track.

## Before You Start [#before-you-start]

Set up [authentication](https://namera.ai/docs/sdk/authentication). Your session key must be
installed on **Base Sepolia**, allow both recipients, and permit the combined
**0.002 ETH** transfer. Fund the account with **0.002 test ETH**.

```sh
npm install @namera-ai/sdk viem
```

## Submit a Batch [#submit-a-batch]

Replace the IDs and both recipients with your own. Calls are executed in array order.

```ts title="index.ts"
import { NameraClient } from "@namera-ai/sdk";
import { parseEther } from "viem";

const namera = new NameraClient({ apiKey: process.env.NAMERA_API_KEY! });

const batch = await namera.executions.execute({
  namespace: "eip155",
  walletId: "0199dfe1-0000-7000-8000-000000000001",
  sessionKeyId: "0199dfe1-0000-7000-8000-000000000002",
  chainId: "eip155:84532",
  calls: [
    {
      to: "0x2222222222222222222222222222222222222222",
      value: parseEther("0.001"),
      data: "0x",
    },
    {
      to: "0x4444444444444444444444444444444444444444",
      value: parseEther("0.001"),
      data: "0x",
    },
  ],
  sponsor: true,
});

if (!batch.success) throw new Error(batch.error.message);

console.log(batch.data);
```

<div className="docs-response">

```json
{
  "namespace": "eip155",
  "submissionId": "0199dfe1-0000-7000-8000-000000000003",
  "status": "prepared",
  "userOperationHash": "0x1111111111111111111111111111111111111111111111111111111111111111"
}
```

</div>

Every call must pass the selected session key's permissions and policies.
Native spending limits apply to the sum of all call values, not each transfer
individually. A batch cannot combine authority from different session keys.

## Combine Different Calls [#combine-different-calls]

The array can contain native transfers and
[encoded contract calls](https://namera.ai/docs/sdk/guides/transactions/interact-with-contracts).
For dependent calls, such as approval followed by a contract interaction, put
the prerequisite first and ensure both calls are permitted.

[Simulate the full batch](https://namera.ai/docs/sdk/guides/transactions/simulate-transactions)
before submitting it, then
[track its submission](https://namera.ai/docs/sdk/guides/transactions/track-transactions).