<VersionWarning version="0.1" />

# signTypedData

Signs typed data from a smart account and calculates an Ethereum-specific signature in [https://eips.ethereum.org/EIPS/eip-712](https://eips.ethereum.org/EIPS/eip-712): `sign(keccak256("\x19\x01" ‖ domainSeparator ‖ hashStruct(message)))`

## Usage

:::code-group
```ts [example.ts]
import { smartAccountClient } from "./smartAccountClient"

const signedData = await smartAccountClient.signTypedData({
    domain: {
        name: "Ether Mail",
        version: "1",
        chainId: 1,
        verifyingContract: getAddress("0xCcCCccccCCCCcCCCCCCcCcCccCcCCCcCcccccccC"),
    },
    types: {
        Person: [
            { name: "name", type: "string" },
            { name: "wallet", type: "address" },
        ],
        Mail: [
            { name: "from", type: "Person" },
            { name: "to", type: "Person" },
            { name: "contents", type: "string" },
        ],
    },
    primaryType: "Mail" as const,
    message: {
        from: {
            name: "Bob",
            wallet: "0xbBbBBBBbbBBBbbbBbbBbbbbBBbBbbbbBbBbbBBbB",
        },
        to: {
            name: "Alice",
            wallet: "0xaAaAaAaaAaAaAaaAaAAAAAAAAaaaAaAaAaaAaaAa",
        },
        contents: "Hello Alice!",
    },
})
```

```ts [smartAccountClient.ts]
import { ENTRYPOINT_ADDRESS_V07, createSmartAccountClient } from "permissionless"
import { privateKeyToSimpleSmartAccount } from "permissionless/accounts"
import { createPimlicoPaymasterClient } from "permissionless/clients/pimlico"
import { createPublicClient, http } from "viem"
import { sepolia } from "viem/chains"

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

// if using a paymaster
const paymasterClient = createPimlicoPaymasterClient({
	transport: http("https://api.pimlico.io/v2/sepolia/rpc?apikey=YOUR_PIMLICO_API_KEY"),
	entryPoint: ENTRYPOINT_ADDRESS_V07,
})

export const simpleSmartAccount = await privateKeyToSimpleSmartAccount(publicClient, {
	privateKey: "0xPRIVATE_KEY",
	factoryAddress: "0x91E60e0613810449d098b0b5Ec8b51A0FE8c8985", // simple version
	entryPoint: ENTRYPOINT_ADDRESS_V07,
})

export const smartAccountClient = createSmartAccountClient({
	account: simpleSmartAccount,
	entryPoint: ENTRYPOINT_ADDRESS_V07,
	chain: sepolia, // or whatever chain you are using
	bundlerTransport: http("https://api.pimlico.io/v2/sepolia/rpc?apikey=YOUR_PIMLICO_API_KEY"),
	middleware: {
		sponsorUserOperation: paymasterClient.sponsorUserOperation, // if using a paymaster
	},
})
```
:::

## Returns

* **Type:** `Hex`

The signed data.

## Parameters

### domain

* **Type:** `TypedDataDomain`

The typed data domain.

### types

* **Type:** `TypedData`

The type definitions for the typed data.

### primaryType

* **Type:** Inferred `string`.

The primary type to extract from `types` and use in `value`.

### message

* **Type:** Inferred from `types` & `primaryType`.

The message to sign