# SignMessage()

**Method Signature:**

```go
func SignMessage(message string, privateKey string) map[string]interface{}
```

**Parameters**

| Name         | Type   | Description                                                         |
| ------------ | ------ | ------------------------------------------------------------------- |
| `message`    | String | Message that you want to sign. In transactions it must be the TxID. |
| `privateKey` | String | Private key in hexadecimal format.                                  |

**Example**

```go
package main

import (
	"fmt"

	"github.com/circular-protocol/circular-go/circular_protocol_api"
	"github.com/circular-protocol/circular-go/utils"
)

func main() {
	var private_key := "0x40942ed2f05daf2a1b0a36453e5164755dd9ac4c79636f1a243eb21a16e0e4df"
	var message := "Hello, World!"

	result := utils.SignMessage(message, private_key)
	fmt.Println(result)
}

```

**Result**

The result will be of type `Map`, but for easier readability, here is the equivalent in JSON.

```json
{
 "Signature" : "0x...",
 "R" : "value",
 "S" : "value"
}
```