# How to use the claimed gas grant

## Usage of Sponsorship Policies with permisionless.js

If you are using [permissionless.js](/references/permissionless), you can use the `PimlicoPaymasterClient` to use sponsorship policies.

:::steps
### Create the clients

First we must create the public, (optionally) paymaster clients that will be used to interact with the SimpleAccount.

```ts
import { createPublicClient, http } from "viem";

const publicClient = createPublicClient({
	transport: http("https://sepolia.rpc.thirdweb.com"),
});

const pimlicoClient = createPimlicoClient({
	chain: sepolia,
	transport: http(
		"https://api.pimlico.io/v2/sepolia/rpc?apikey=YOUR_PIMLICO_API_KEY",
	),
	entryPoint: {
		address: entryPoint07Address,
		version: "0.7",
	},
});
```

### Create an account

Now, create an account. This can any of the accounts supported by permissionless.js or custom accounts conforming to the interface. For this example, we'll use a Simple account.

```ts
import { privateKeyToAccount } from "viem/accounts";
import { toSimpleSmartAccount } from "permissionless/accounts";

export const simpleSmartAccount = await toSimpleSmartAccount({
	client: publicClient,
	owner: privateKeyToAccount("0xPRIVATE_KEY"),
	entryPoint: {
		address: entryPoint07Address,
		version: "0.7",
	},
});
```

### Create the smart account client with middleware

When creating the `smartAccountClient`, we can pass in a `middleware.sponsorUserOperation` function that will be called before a user operation is signed and sent.
This is where we can pass in the `sponsorshipPolicyId` that we want to use.

```ts
import { sepolia } from "viem/chains";
import { createSmartAccountClient } from "permissionless";
import { createPimlicoClient } from "permissionless/clients/pimlico";
import { entryPoint07Address } from "viem/account-abstraction";

export const smartAccountClient = createSmartAccountClient({
	account: simpleSmartAccount,
	chain: sepolia,
	bundlerTransport: http(
		"https://api.pimlico.io/v2/sepolia/rpc?apikey=YOUR_PIMLICO_API_KEY",
	),
	paymaster: pimlicoClient,
	paymasterContext: {
		sponsorshipPolicyId: "your_claimed_sponsorship_policy_id", // [!code ++]
	},
	userOperation: {
		estimateFeesPerGas: async () => {
			return (await pimlicoClient.getUserOperationGasPrice()).fast; // if using pimlico bundlers
		},
	},
});
```

### Send a sponsored transaction

Finally, let's submit a transaction from the smart account. We will send a transaction to the `0xd8da6bf26964af9d7eed9e03e53415d37aa96045` (vitalik.eth) address with `0x1234` as example `callData`.

```typescript
const txHash = await smartAccountClient.sendTransaction({
	to: "0xd8da6bf26964af9d7eed9e03e53415d37aa96045",
	value: 0n,
	data: "0x1234",
})

console.log(`User operation included: https://sepolia.etherscan.io/tx/${txHash}`)
```

Congratulations, you have sent a transaction using a gas grant! 🎉
:::