# personal\_sign

Calculates an ethereum signature of the given data from the selected account.

**Warning**

This method adds the standard `"\x19Ethereum Signed Message:\n" + len(message)` prefix when calculating the signature hash.

`ecdsa(keccak256("\x19Ethereum Signed Message:\n" + len(message) + message))`

**Parameters**[**​**](https://docs.constellationnetwork.io/stargazer/APIReference/ethereumRPCAPI/personal_sign#parameters)

| Name    | Type                    | Description           |
| ------- | ----------------------- | --------------------- |
| Data    | `HexString` \| `String` | Data to sign.         |
| Account | `Address`               | Account to sign from. |

**Return Type**[**​**](https://docs.constellationnetwork.io/stargazer/APIReference/ethereumRPCAPI/personal_sign#return-type)

`HexString<Signature>` - The ethereum ecdsa signature.

**Example**[**​**](https://docs.constellationnetwork.io/stargazer/APIReference/ethereumRPCAPI/personal_sign#example)

```typescript
await provider.request({
  method: "personal_sign",
  params: ["0xdeadbeaf", "0x9b2055d370f73ec7d8a03e965129118dc8f5bf83"],
});
// "0xa3f20717a250c2b0b729b7e5becbff67fdaef7e0699da4de7ca5895b02a170a12d887fd3b17bfdce3481f10bea41f45ba9f709d39ce8325427b57afcfc994cee1b"
```