# Gas Policy (/smart-accounts/permissions/policies/gas)

> For the complete documentation index, see [llms.txt](/llms.txt)



It can also enforce that the UserOps must use paymasters, or use a specific paymaster.

## API [#api]

```ts
import { toGasPolicy } from "@zerodev/permissions/policies"

// Set a total amount
const gasPolicy = toGasPolicy({
  allowed: parseEther('0.1'),
})

// Or enforce that a paymaster must be used
const gasPolicy = toGasPolicy({
  enforcePaymaster: true,
})

// Or enforce that a specific paymaster is used
const gasPolicy = toGasPolicy({
  allowedPaymaster: "PAYMASTER_ADDRESS",
})

const validator = toPermissionValidator(publicClient, {
  entryPoint,
  kernelVersion,
  signer: someSigner,
  policies: [
    gasPolicy,
    // ...other policies
  ],
})
```

`toGasPolicy` takes one or more of the following arguments:

* `allowed`: an amount, in wei, of the ETH (or whatever native token) that the signer can spend on gas, in total across all UserOps it sends.
* `enforcePaymaster`: a boolean value.  If set to true, enforce that a paymaster must be used.
* `allowedPaymaster`: a paymaster address.  If set, enforce that the specific paymaster is used.